Citation: Changzhi Ai, Li Tong, Zhipeng Wang, Xidong Zhang, Guizhen Wang, Shengjue Deng, Jin Li, Shiwei Lin. Facile synthesis and photoelectrochemical properties of novel TiN/C₃N₄/CdS nanotube core/shell arrays[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1645-1653. doi: S1872-2067(19)63512-6 shu

Facile synthesis and photoelectrochemical properties of novel TiN/C₃N₄/CdS nanotube core/shell arrays

Changzhi Ai ^a,b, ,
Li Tong ^b ,
Zhipeng Wang ^a,b ,
Xidong Zhang ^a,b ,
Guizhen Wang ^b ,
Shengjue Deng ^c ,
Jin Li ^d ,
Shiwei Lin ^a,b

a State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, Hainan, China;
b School of Materials Science and Engineering, Hainan University, Haikou 570228, Hainan, China;
c College of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
d School of Science, Hainan University, Haikou 570228, Hainan, China

Received Date: 21 February 2020
Revised Date: 29 March 2020

Fund Project: This work was supported by the Key Research and Development Program of Hainan Province (ZDYF2017166), and the National Natural Science Foundation of China (51462008, 61764003, 11574157).

Recently, the g-C₃N₄-based heterojunctions have been widely investigated for their greatly enhanced photogenerated carrier separation efficiency. However, most studies are based on the study of g-C₃N₄ powders. In this study, a novel TiN/C₃N₄/CdS nanotube arrays core/shell structure is designed to improve the photoelectrochemical catalytic performance of the g-C₃N₄-based heterojunctions. Among them, TiN nanotube arrays do not respond to simulated solar light, and thus only serve as an excellently conductive nanotube arrays backbone for supporting g-C₃N₄/CdS heterojunctions. g-C₃N₄ prepared by simple liquid atomic layer deposition, which possesses appropriate energy band position, mainly acts as the electron acceptor to transport and separate electrons. Deposited CdS quantum dots obtained by successive ionic layer adsorption reaction can effectively absorb visible light and thus act as a light absorber. The TiN/C₃N₄/CdS nanotube arrays core/shell structure could be verified by X-ray diffractions, Raman spectra, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy elemental mappings and X-ray photoelectron spectroscopy. Compared with TiN/C₃N₄ nanotube arrays, the TiN/C₃N₄/CdS samples greatly improve the photoelectrochemical performance, which can be evaluated by photoelectrochemical tests and photoelectrochemical catalytic degradation. Especially, the optimized photocurrent density of TiN/C₃N₄/CdS has almost 120 times improvement on TiN/C₃N₄ at 0 V bias under simulated sunlight, which can be ascribed to the effective expansion of the light absorption range and separation of electron-hole pairs.
- TiN,
- g-C₃N₄/CdS,
- PEC catalysis,
- Degradation,
- Nanotube arrays
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Facile synthesis and photoelectrochemical properties of novel TiN/C3N4/CdS nanotube core/shell arrays

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Facile synthesis and photoelectrochemical properties of novel TiN/C₃N₄/CdS nanotube core/shell arrays