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2026 Volume 45 Issue 2
2026, 45(2): 100746
doi: 10.1016/j.cjsc.2025.100746
Abstract:
Expediting the discovery of extra-large-pore zeolites enabled by MicroED and combinatorial chemistry
2026, 45(2): 100748
doi: 10.1016/j.cjsc.2025.100748
Abstract:
2026, 45(2): 100770
doi: 10.1016/j.cjsc.2025.100770
Abstract:
Nanofibers hold great promise as oxygen electrode materials in solid oxide cells (SOCs). However, conventional fabrication methods—such as slurry processing and high-temperature sintering—inevitably disrupt their delicate nano-architectures. Here, we propose an innovative self-assembly strategy mediated by current polarization to construct La0.6Sr0.4Co0.2Fe0.8O3-δ-Gd0.1Ce0.9O2-δ (LSCF-GDC) nanofiber composite film electrodes. This approach largely preserves the fibrous morphology while promoting coherent heterointerfaces, abundant active sites, and efficient electron/ion pathways. Benefiting from this tailored architecture, the electrode achieves a low polarization resistance of 0.117 Ω cm2 and a peak power density of 1.482 W cm-2 at 800 °C. Moreover, in CO2 electrolysis mode, it delivers an impressive current density of 2.30 A cm-2 at 1.8 V. These results establish nanofiber heterostructure films, enabled by current polarization assembly, as a powerful strategy to simultaneously enhance activity, durability, and mass transport, offering new opportunities for high-performance intermediate-temperature SOCs.
Nanofibers hold great promise as oxygen electrode materials in solid oxide cells (SOCs). However, conventional fabrication methods—such as slurry processing and high-temperature sintering—inevitably disrupt their delicate nano-architectures. Here, we propose an innovative self-assembly strategy mediated by current polarization to construct La0.6Sr0.4Co0.2Fe0.8O3-δ-Gd0.1Ce0.9O2-δ (LSCF-GDC) nanofiber composite film electrodes. This approach largely preserves the fibrous morphology while promoting coherent heterointerfaces, abundant active sites, and efficient electron/ion pathways. Benefiting from this tailored architecture, the electrode achieves a low polarization resistance of 0.117 Ω cm2 and a peak power density of 1.482 W cm-2 at 800 °C. Moreover, in CO2 electrolysis mode, it delivers an impressive current density of 2.30 A cm-2 at 1.8 V. These results establish nanofiber heterostructure films, enabled by current polarization assembly, as a powerful strategy to simultaneously enhance activity, durability, and mass transport, offering new opportunities for high-performance intermediate-temperature SOCs.
2026, 45(2): 100771
doi: 10.1016/j.cjsc.2025.100771
Abstract:
Cobalt-based catalysts for peroxymonosulfate (PMS) activation are often hindered by metal leaching and structural instability, limiting their practical application. To address these challenges, we developed a novel Co9S8/Ni3S2 heterojunction catalyst via a hydrothermal method followed by thermal reduction, employing interface engineering to inhibit metal co leaching. The resulting Co9S8/Ni3S2/PMS system achieved complete tylosin degradation within 120 s. Notably, cobalt leaching was reduced by 4.5 times compared to pure Co9S8, demonstrating significantly enhanced catalyst stability. Furthermore, the system exhibited high efficiency in degrading a variety of antibiotics, good cyclic stability, and strong tolerance to diverse aqueous environments. The enhanced performance is attributed to the interface-engineered heterostructure, which not only improves the structural stability by suppresses metal cation leaching, but also facilitates enhanced PMS adsorption onto the catalyst surface. This improved PMS adsorption, particularly on cobalt active sites, results in substantial electron enrichment, thereby promoting efficient tylosin degradation. This work highlights the importance of interface engineering in designing advanced heterojunction catalysts for stable, and efficient antibiotic wastewater treatment.
Cobalt-based catalysts for peroxymonosulfate (PMS) activation are often hindered by metal leaching and structural instability, limiting their practical application. To address these challenges, we developed a novel Co9S8/Ni3S2 heterojunction catalyst via a hydrothermal method followed by thermal reduction, employing interface engineering to inhibit metal co leaching. The resulting Co9S8/Ni3S2/PMS system achieved complete tylosin degradation within 120 s. Notably, cobalt leaching was reduced by 4.5 times compared to pure Co9S8, demonstrating significantly enhanced catalyst stability. Furthermore, the system exhibited high efficiency in degrading a variety of antibiotics, good cyclic stability, and strong tolerance to diverse aqueous environments. The enhanced performance is attributed to the interface-engineered heterostructure, which not only improves the structural stability by suppresses metal cation leaching, but also facilitates enhanced PMS adsorption onto the catalyst surface. This improved PMS adsorption, particularly on cobalt active sites, results in substantial electron enrichment, thereby promoting efficient tylosin degradation. This work highlights the importance of interface engineering in designing advanced heterojunction catalysts for stable, and efficient antibiotic wastewater treatment.
2026, 45(2): 100772
doi: 10.1016/j.cjsc.2025.100772
Abstract:
In the application of nonlinear optical components, ideal nonlinear optical media typically need to possess high nonlinear absorption coefficients and large modulation depths, among other characteristics. The extreme thinness of two-dimensional (2D) materials, typically at the atomic scale, offers significant advantages in miniaturized optoelectronic devices. However, this also reduces the effective light-matter interaction length, ultimately limiting the achievable interaction intensity. To enhance their nonlinear optical response and unlock their full potential in nanophotonics, current research primarily focuses on two directions: one is to develop novel 2D quantum-confined material systems with enhanced intrinsic nonlinear optical responses; the other is to design effective performance modulation strategies based on nonlinear optical theory to enable precise regulation of nonlinear optical properties. Here, recent progress in tailoring third-order nonlinear optical responses of 2D materials is systematically reviewed here. Various strategies for modulating and enhancing third-order nonlinear optical responses in 2D materials are comprehensively discussed, which can be systematically classified into intrinsic regulation and light-matter interaction modulation. Moreover, the remaining challenges in modulating third-order nonlinear optical responses of 2D materials and perspectives on future research directions are discussed.
In the application of nonlinear optical components, ideal nonlinear optical media typically need to possess high nonlinear absorption coefficients and large modulation depths, among other characteristics. The extreme thinness of two-dimensional (2D) materials, typically at the atomic scale, offers significant advantages in miniaturized optoelectronic devices. However, this also reduces the effective light-matter interaction length, ultimately limiting the achievable interaction intensity. To enhance their nonlinear optical response and unlock their full potential in nanophotonics, current research primarily focuses on two directions: one is to develop novel 2D quantum-confined material systems with enhanced intrinsic nonlinear optical responses; the other is to design effective performance modulation strategies based on nonlinear optical theory to enable precise regulation of nonlinear optical properties. Here, recent progress in tailoring third-order nonlinear optical responses of 2D materials is systematically reviewed here. Various strategies for modulating and enhancing third-order nonlinear optical responses in 2D materials are comprehensively discussed, which can be systematically classified into intrinsic regulation and light-matter interaction modulation. Moreover, the remaining challenges in modulating third-order nonlinear optical responses of 2D materials and perspectives on future research directions are discussed.
2026, 45(2): 100774
doi: 10.1016/j.cjsc.2025.100774
Abstract:
Developing single-component all-inorganic perovskites with excitation-dependent multicolor emission remains a considerable challenge for next-generation anti-counterfeiting technologies. Herein, we report an excitation-dependent tunable photoluminescence (PL) switching behavior in all-inorganic CsCdCl3 perovskite, which arises from by its unique structural asymmetry featuring both isolated [CdCl6]4− octahedra (D3d symmetry) and face-sharing [Cd2Cl9]5− dimers (C3v symmetry). This dual-coordination environment facilitates the dual-band emissions at 500 nm and 590 nm, attributed to free exciton (FE) recombination in [CdCl6]4− octahedra and self-trapped exciton (STE) emission from [Cd2Cl9]5− dimers, respectively. The competitive excitation pathways between FE and STE enable the reversible color switching between green and orange emission via excitation-wavelength modulation. The excitation-wavelength sensitivity is governed by the emission intensity ratio, where 254 nm excitation favors the dimer-associated STE emission at 590 nm while 365 nm excitation selectively strengthens the octahedral FE emission at 500 nm. Density functional theory (DFT) calculations confirm the direct bandgap of CsCdCl3 (2.62 eV), and elucidate the electronic transition mechanism. The excitation-dependent color-switching capability of CsCdCl3 offers promising potential for advanced applications in anti-counterfeiting and information encryption technologies. This work establishes a paradigm for designing single-component emitters with excitation-controlled multicolor PL, thereby unlocking possibilities for developing high-security anti-counterfeiting technologies.
Developing single-component all-inorganic perovskites with excitation-dependent multicolor emission remains a considerable challenge for next-generation anti-counterfeiting technologies. Herein, we report an excitation-dependent tunable photoluminescence (PL) switching behavior in all-inorganic CsCdCl3 perovskite, which arises from by its unique structural asymmetry featuring both isolated [CdCl6]4− octahedra (D3d symmetry) and face-sharing [Cd2Cl9]5− dimers (C3v symmetry). This dual-coordination environment facilitates the dual-band emissions at 500 nm and 590 nm, attributed to free exciton (FE) recombination in [CdCl6]4− octahedra and self-trapped exciton (STE) emission from [Cd2Cl9]5− dimers, respectively. The competitive excitation pathways between FE and STE enable the reversible color switching between green and orange emission via excitation-wavelength modulation. The excitation-wavelength sensitivity is governed by the emission intensity ratio, where 254 nm excitation favors the dimer-associated STE emission at 590 nm while 365 nm excitation selectively strengthens the octahedral FE emission at 500 nm. Density functional theory (DFT) calculations confirm the direct bandgap of CsCdCl3 (2.62 eV), and elucidate the electronic transition mechanism. The excitation-dependent color-switching capability of CsCdCl3 offers promising potential for advanced applications in anti-counterfeiting and information encryption technologies. This work establishes a paradigm for designing single-component emitters with excitation-controlled multicolor PL, thereby unlocking possibilities for developing high-security anti-counterfeiting technologies.
2026, 45(2): 100788
doi: 10.1016/j.cjsc.2025.100788
Abstract:
Four zinc borates, MNa9ZnB16O28(OH)4 (M = K, Rb, Cs; 1−3) and Na3ZnB5O10 (4) have been made under solvothermal conditions. Compounds 1−3 are isostructural and contain an unprecedented [B16O28(OH)4]12− cluster constructed from eight B3O3 rings sharing BO4 tetrahedra. The clusters further link with ZnO4 tetrahedra to form one-dimensional (1-D) chains, which further assemble into a 3-D supramolecular framework through hydrogen bonds. 4 was made by raising the reaction temperature of 1 and features a porous-layer structure composed of [B4O9]6−clusters, BO3 units and ZnO4 tetrahedra. All compounds exhibit short deep ultraviolet (DUV) cutoff edges below 190 nm. Notably, 1−3 crystallize in the acentric space group I−4 and display second harmonic generation (SHG) responses of approximately 1.26, 1.30 and 1.32 times that of KH2PO4 (KDP), respectively, highlighting their potential as DUV nonlinear optical materials.
Four zinc borates, MNa9ZnB16O28(OH)4 (M = K, Rb, Cs; 1−3) and Na3ZnB5O10 (4) have been made under solvothermal conditions. Compounds 1−3 are isostructural and contain an unprecedented [B16O28(OH)4]12− cluster constructed from eight B3O3 rings sharing BO4 tetrahedra. The clusters further link with ZnO4 tetrahedra to form one-dimensional (1-D) chains, which further assemble into a 3-D supramolecular framework through hydrogen bonds. 4 was made by raising the reaction temperature of 1 and features a porous-layer structure composed of [B4O9]6−clusters, BO3 units and ZnO4 tetrahedra. All compounds exhibit short deep ultraviolet (DUV) cutoff edges below 190 nm. Notably, 1−3 crystallize in the acentric space group I−4 and display second harmonic generation (SHG) responses of approximately 1.26, 1.30 and 1.32 times that of KH2PO4 (KDP), respectively, highlighting their potential as DUV nonlinear optical materials.
2026, 45(2): 100789
doi: 10.1016/j.cjsc.2025.100789
Abstract:
Boron cage hybrid supramolecular metal-organic frameworks (BSFs) are a subclass of anion-pillared MOFs (APMOFs). This type of materials are formed through the self-assembly of borane cage anions, metal cations and organic ligands. They possess dense arrays of anionic binding sites within the one-dimensional pores, which can interact selectively with hydrocarbon molecules via B-H···H-C dihydrogen bonds. Therefore, the design of BSFs with appropriate pore properties holds significant potential for achieving highly efficient hydrocarbon separation. However, the current research on BSFs is still in its infancy when compared to other types of APMOFs. Due to the weak coordination ability of borane anions, the directional assembly of BSFs remains challenging. This review article targets to provide an overview of the development history of BSFs, and introduce in detail their design strategies and synthesis methods. In addition, this review will elaborate on the characteristics of BSFs and discuss their gas separation performance. Finally, the current challenges faced by BSFs are summarized, and reasonable suggestions for the future design, development, and industrial application of BSFs are put forward.
Boron cage hybrid supramolecular metal-organic frameworks (BSFs) are a subclass of anion-pillared MOFs (APMOFs). This type of materials are formed through the self-assembly of borane cage anions, metal cations and organic ligands. They possess dense arrays of anionic binding sites within the one-dimensional pores, which can interact selectively with hydrocarbon molecules via B-H···H-C dihydrogen bonds. Therefore, the design of BSFs with appropriate pore properties holds significant potential for achieving highly efficient hydrocarbon separation. However, the current research on BSFs is still in its infancy when compared to other types of APMOFs. Due to the weak coordination ability of borane anions, the directional assembly of BSFs remains challenging. This review article targets to provide an overview of the development history of BSFs, and introduce in detail their design strategies and synthesis methods. In addition, this review will elaborate on the characteristics of BSFs and discuss their gas separation performance. Finally, the current challenges faced by BSFs are summarized, and reasonable suggestions for the future design, development, and industrial application of BSFs are put forward.
2026, 45(2): 100790
doi: 10.1016/j.cjsc.2025.100790
Abstract:
2026, 45(2): 100791
doi: 10.1016/j.cjsc.2025.100791
Abstract:
Diatomic-site catalysts (DACs) have recently emerged as highly promising platforms for photocatalytic CO2 reduction, offering unique opportunities to control reaction thermodynamics and kinetics for selective C2+ product formation. By integrating two adjacent metal centers within well-defined architectures, DACs enable synergistic activation of CO2 and stabilization of key C–C coupling intermediates, surpassing the limitations of single-atom or bulk catalysts. This perspective highlights the recent advances in DAC synthesis strategies, characterization techniques, mechanistic insights into multi-carbon formation, and the fundamental reasons why DACs facilitate C–C bond formation with high selectivity. A critical discussion is presented on the mechanism of C2+ formation on these unique active sites. Furthermore, the role of defect engineering within the catalyst support or surrounding matrix in modulating the electronic structure and stability of DACs, is thoroughly examined. Finally, this perspective outlines future research directions to further unlock the full potential of DACs for efficient and selective photocatalytic CO2 reduction to C2+ products.
Diatomic-site catalysts (DACs) have recently emerged as highly promising platforms for photocatalytic CO2 reduction, offering unique opportunities to control reaction thermodynamics and kinetics for selective C2+ product formation. By integrating two adjacent metal centers within well-defined architectures, DACs enable synergistic activation of CO2 and stabilization of key C–C coupling intermediates, surpassing the limitations of single-atom or bulk catalysts. This perspective highlights the recent advances in DAC synthesis strategies, characterization techniques, mechanistic insights into multi-carbon formation, and the fundamental reasons why DACs facilitate C–C bond formation with high selectivity. A critical discussion is presented on the mechanism of C2+ formation on these unique active sites. Furthermore, the role of defect engineering within the catalyst support or surrounding matrix in modulating the electronic structure and stability of DACs, is thoroughly examined. Finally, this perspective outlines future research directions to further unlock the full potential of DACs for efficient and selective photocatalytic CO2 reduction to C2+ products.
2026, 45(2): 100793
doi: 10.1016/j.cjsc.2025.100793
Abstract:
Crystalline porous organic frameworks (CPOFs), with their highly ordered pores and tunable organic structures, have shown immense promise as platforms for enzyme immobilization. However, research on enzyme@CPOF composites, particularly for biomedical applications, is still in its early stages and lacks comprehensive and systematic review. This article provides a thorough overview of recent advances in the rational design, synthesis, and application of enzyme@CPOF biocomposites. Emphasis is placed on immobilization strategies and the structure-performance relationships revealed through molecular-level investigations. Furthermore, we highlight emerging applications in biocatalysis and biomedical engineering, and discuss persistent challenges and future directions to advance CPOFs as versatile, high-performance substrates for enzyme immobilization.
Crystalline porous organic frameworks (CPOFs), with their highly ordered pores and tunable organic structures, have shown immense promise as platforms for enzyme immobilization. However, research on enzyme@CPOF composites, particularly for biomedical applications, is still in its early stages and lacks comprehensive and systematic review. This article provides a thorough overview of recent advances in the rational design, synthesis, and application of enzyme@CPOF biocomposites. Emphasis is placed on immobilization strategies and the structure-performance relationships revealed through molecular-level investigations. Furthermore, we highlight emerging applications in biocatalysis and biomedical engineering, and discuss persistent challenges and future directions to advance CPOFs as versatile, high-performance substrates for enzyme immobilization.
2026, 45(2): 100794
doi: 10.1016/j.cjsc.2025.100794
Abstract:
2026, 45(2): 100795
doi: 10.1016/j.cjsc.2025.100795
Abstract:
The advantages of transition metal compounds such as ultrahigh theoretical capacity and abundant active sites make them promising anode materials for high energy density lithium-ion batteries. Unfortunately, problems such as severe volume expansion and poor electrical conductivity seriously hinder their large-scale application. In general, reasonable optimization of composition and structure is an effective strategy for developing anode materials with excellent lithium storage properties. In this paper, ZnS/MnO composites were constructed by solvothermal sulfidation and calcination using Zn-Mn organic frameworks as self-sacrificing templates. From the perspective of material composition, both ZnS and MnO have excellent theoretical specific capacity, and the two-component metal center can provide more abundant active sites. From the perspective of structural optimization, the ZnS/MnO composites inherit the loose porous structure of the calcined metal-organic frameworks, which can not only effectively alleviate the volume expansion during the charge and discharge process, but can also help improve the conductivity of the composites and promote charge transport. Both experimental results and density functional theory calculations show that the two-component metal center of ZnS/MnO composites can improve the electronic conductivity and reduce the migration energy barrier, thus showing excellent cycle stability and remarkable rate performance. The study provides another idea for the development of high-performance anode materials for lithium-ion batteries.
The advantages of transition metal compounds such as ultrahigh theoretical capacity and abundant active sites make them promising anode materials for high energy density lithium-ion batteries. Unfortunately, problems such as severe volume expansion and poor electrical conductivity seriously hinder their large-scale application. In general, reasonable optimization of composition and structure is an effective strategy for developing anode materials with excellent lithium storage properties. In this paper, ZnS/MnO composites were constructed by solvothermal sulfidation and calcination using Zn-Mn organic frameworks as self-sacrificing templates. From the perspective of material composition, both ZnS and MnO have excellent theoretical specific capacity, and the two-component metal center can provide more abundant active sites. From the perspective of structural optimization, the ZnS/MnO composites inherit the loose porous structure of the calcined metal-organic frameworks, which can not only effectively alleviate the volume expansion during the charge and discharge process, but can also help improve the conductivity of the composites and promote charge transport. Both experimental results and density functional theory calculations show that the two-component metal center of ZnS/MnO composites can improve the electronic conductivity and reduce the migration energy barrier, thus showing excellent cycle stability and remarkable rate performance. The study provides another idea for the development of high-performance anode materials for lithium-ion batteries.
2026, 45(2): 100796
doi: 10.1016/j.cjsc.2025.100796
Abstract:
Zinc-air batteries (ZABs) have emerged as promising candidates for next-generation energy storage systems due to their high energy density, safety, and environmental benignity. However, their efficiency is hindered by sluggish oxygen reduction reaction (ORR) kinetics. Constructing heterojunction with optimized interfacial electronic structure has emerged as a promising approach to enhance ORR activity. Herein, we report a Co–Mo2C heterojunction encapsulated within nitrogen-doped carbon (Co–Mo2C@NC) derived from a ZnCoMo-based metal–organic framework (ZnCoMo–HZIF). The intimate interface between Co and Mo2C enables the strong electronic coupling, which induces the interfacial charge redistribution and optimizes the d-band center of Co active sites. This electronic modulation significantly enhances the oxygen intermediate adsorption and lowers the energy barrier. As a result, Co–Mo2C@NC delivers outstanding ORR performance with a high half-wave potential (E1/2) of 0.85 V, a low Tafel slope of 94.7 mV dec-1, and a good long-term stability. Additionally, Co–Mo2C@NC as the air cathode in a zinc-air battery exhibits superior power performance and outstanding cycling stability.
Zinc-air batteries (ZABs) have emerged as promising candidates for next-generation energy storage systems due to their high energy density, safety, and environmental benignity. However, their efficiency is hindered by sluggish oxygen reduction reaction (ORR) kinetics. Constructing heterojunction with optimized interfacial electronic structure has emerged as a promising approach to enhance ORR activity. Herein, we report a Co–Mo2C heterojunction encapsulated within nitrogen-doped carbon (Co–Mo2C@NC) derived from a ZnCoMo-based metal–organic framework (ZnCoMo–HZIF). The intimate interface between Co and Mo2C enables the strong electronic coupling, which induces the interfacial charge redistribution and optimizes the d-band center of Co active sites. This electronic modulation significantly enhances the oxygen intermediate adsorption and lowers the energy barrier. As a result, Co–Mo2C@NC delivers outstanding ORR performance with a high half-wave potential (E1/2) of 0.85 V, a low Tafel slope of 94.7 mV dec-1, and a good long-term stability. Additionally, Co–Mo2C@NC as the air cathode in a zinc-air battery exhibits superior power performance and outstanding cycling stability.
2026, 45(2): 100797
doi: 10.1016/j.cjsc.2025.100797
Abstract:
Surface-enhanced Raman scattering (SERS) spectroscopy based on transition metal oxide (TMO) substrates has emerged as a frontier research area, offering distinctive advantages in chemical stability, cost-effectiveness, and tunable optoelectronic properties compared to conventional noble metal substrates. This review systematically clarifies the dual enhancement mechanisms of TMO-based SERS including charge transfer (CT) resonance at the molecule-semiconductor interface and electromagnetic field amplification induced by localized surface plasmon resonance (LSPR); the two work synergistically to achieve signal amplification. In practical applications, TMO enable multi-scenario analysis via the controllable defect engineering-interfacial CT synergistic mechanism in SERS technology. These scenarios include ultrasensitive detection of biomarkers, dynamic tracking of cellular metabolism, real-time monitoring of environmental pollutants, and mechanistic analysis of catalytic reaction pathways. Nevertheless, critical challenges persist, particularly regarding quantitative reproducibility and long-term stability under operational conditions. This review focuses on discussing the SERS enhancement mechanisms of TMO, summarizing their diverse analytical applications across multiple fields, and briefly addressing existing limitations, aiming to provide insights for further advancement in TMO-based SERS research.
Surface-enhanced Raman scattering (SERS) spectroscopy based on transition metal oxide (TMO) substrates has emerged as a frontier research area, offering distinctive advantages in chemical stability, cost-effectiveness, and tunable optoelectronic properties compared to conventional noble metal substrates. This review systematically clarifies the dual enhancement mechanisms of TMO-based SERS including charge transfer (CT) resonance at the molecule-semiconductor interface and electromagnetic field amplification induced by localized surface plasmon resonance (LSPR); the two work synergistically to achieve signal amplification. In practical applications, TMO enable multi-scenario analysis via the controllable defect engineering-interfacial CT synergistic mechanism in SERS technology. These scenarios include ultrasensitive detection of biomarkers, dynamic tracking of cellular metabolism, real-time monitoring of environmental pollutants, and mechanistic analysis of catalytic reaction pathways. Nevertheless, critical challenges persist, particularly regarding quantitative reproducibility and long-term stability under operational conditions. This review focuses on discussing the SERS enhancement mechanisms of TMO, summarizing their diverse analytical applications across multiple fields, and briefly addressing existing limitations, aiming to provide insights for further advancement in TMO-based SERS research.
2026, 45(2): 100798
doi: 10.1016/j.cjsc.2025.100798
Abstract:
The construction of heterojunctions at phase interfaces represents a crucial strategy for enhancing photocatalytic activity, but developing more cost-effective and higher-performance photocatalysts remains a challenge. Herein, we designed a S-scheme van der Waals heterojunctions (vdWHs) photocatalyst by in situ growth of Co9S8 on flower-like graphitic carbon nitride (FCN). The S-scheme heterojunction ensures efficient charge separation and significantly enhances redox capabilities, while the vdWHs specifically overcome the lattice mismatch limitation inherent in conventional S-scheme heterojunctions owing to its interfacial coupling. In situ XPS analysis was used to confirm the direction of interfacial charge transfer. Consequently, the photocatalyst achieved an optimal H2 evolution of 948.04 μmol h-1 g-1 without Pt cocatalysts. The tetracycline hydrochloride degradation reached 97.90% within 9 min through photocatalytic peroxymonosulfate activation that generated multiple reactive oxygen species. Liquid chromatography-mass spectrometry was employed to identify the possible reaction pathways and investigate the degradation products. This work advanced a rational design of S-scheme Co9S8/FCN vdWHs photocatalysts and offered promising solutions for both renewable energy production and wastewater remediation.
The construction of heterojunctions at phase interfaces represents a crucial strategy for enhancing photocatalytic activity, but developing more cost-effective and higher-performance photocatalysts remains a challenge. Herein, we designed a S-scheme van der Waals heterojunctions (vdWHs) photocatalyst by in situ growth of Co9S8 on flower-like graphitic carbon nitride (FCN). The S-scheme heterojunction ensures efficient charge separation and significantly enhances redox capabilities, while the vdWHs specifically overcome the lattice mismatch limitation inherent in conventional S-scheme heterojunctions owing to its interfacial coupling. In situ XPS analysis was used to confirm the direction of interfacial charge transfer. Consequently, the photocatalyst achieved an optimal H2 evolution of 948.04 μmol h-1 g-1 without Pt cocatalysts. The tetracycline hydrochloride degradation reached 97.90% within 9 min through photocatalytic peroxymonosulfate activation that generated multiple reactive oxygen species. Liquid chromatography-mass spectrometry was employed to identify the possible reaction pathways and investigate the degradation products. This work advanced a rational design of S-scheme Co9S8/FCN vdWHs photocatalysts and offered promising solutions for both renewable energy production and wastewater remediation.
2026, 45(2): 100799
doi: 10.1016/j.cjsc.2025.100799
Abstract:
2026, 45(2): 100801
doi: 10.1016/j.cjsc.2025.100801
Abstract:
The control of magnetic state is crucial for spintronic applications but remains a significant challenge. Traditionally, controlling magnetic state relies on physical approaches, such as applying external magnetic fields or utilizing spin-orbit coupling. In our previous work, we proposed a novel chemical approach to manipulate the magnetic state of a system through lactim-lactam tautomerization. Here, by first principles calculations, we extend the type of tautomerization to intramolecular hydrogen migration, and reveal that hydrogen migration can modulate magnetic coupling and lead to distinct magnetic configurations in two-dimensional (2D) metal-organic frameworks (MOFs) composed of diradical porphyrinoid and Fe. The migration of hydrogen atoms within porphyrinoid results in four isometric MOFs with notable changes in spin density distribution on organic linkers, which subsequently alters the magnetic coupling between the metal node and organic linkers, leading to ferromagnetic-ferrimagnetic transition in the framework. The magnetic coupling strength also changes significantly, with the Curie temperature enhanced from 5.2 K to 100.1 K. Furthermore, accompanying with the magnetic transition, the MOFs experience an electronic transition from normal half semiconductors (with band gaps of 0.11 and 0.03 eV), where the valence band (VB) and conduction band (CB) share the same spin channel, to bipolar magnetic semiconductors (with band gaps of 0.06 and 0.13 eV), where the VB and CB become fully spin-polarized in opposite directions.
The control of magnetic state is crucial for spintronic applications but remains a significant challenge. Traditionally, controlling magnetic state relies on physical approaches, such as applying external magnetic fields or utilizing spin-orbit coupling. In our previous work, we proposed a novel chemical approach to manipulate the magnetic state of a system through lactim-lactam tautomerization. Here, by first principles calculations, we extend the type of tautomerization to intramolecular hydrogen migration, and reveal that hydrogen migration can modulate magnetic coupling and lead to distinct magnetic configurations in two-dimensional (2D) metal-organic frameworks (MOFs) composed of diradical porphyrinoid and Fe. The migration of hydrogen atoms within porphyrinoid results in four isometric MOFs with notable changes in spin density distribution on organic linkers, which subsequently alters the magnetic coupling between the metal node and organic linkers, leading to ferromagnetic-ferrimagnetic transition in the framework. The magnetic coupling strength also changes significantly, with the Curie temperature enhanced from 5.2 K to 100.1 K. Furthermore, accompanying with the magnetic transition, the MOFs experience an electronic transition from normal half semiconductors (with band gaps of 0.11 and 0.03 eV), where the valence band (VB) and conduction band (CB) share the same spin channel, to bipolar magnetic semiconductors (with band gaps of 0.06 and 0.13 eV), where the VB and CB become fully spin-polarized in opposite directions.
