NH2-MIL-125/Na掺杂g-C3N4复合S型异质结的构建及其光催化产过氧化氢性能

引用本文: 樊凡, 修浩, 王宇婷, 崔永朋, 王雅君. NH₂-MIL-125/Na掺杂g-C₃N₄复合S型异质结的构建及其光催化产过氧化氢性能[J]. 物理化学学报, 2026, 42(2): 100143. doi: 10.1016/j.actphy.2025.100143 shu

Citation: Fan Fan, Hao Xiu, Yuting Wang, Yongpeng Cui, Yajun Wang. Construction of NH₂-MIL-125/Na-doped g-C₃N₄ composite S-scheme heterojunction and its performance in photocatalytic hydrogen peroxide production[J]. Acta Physico-Chimica Sinica, 2026, 42(2): 100143. doi: 10.1016/j.actphy.2025.100143 shu

NH₂-MIL-125/Na掺杂g-C₃N₄复合S型异质结的构建及其光催化产过氧化氢性能

中国石油大学(北京)新能源与材料学院, 重质油全国重点实验室, 北京 102249

通讯作者: Email: wangyajun@cup.edu.cn (王雅君); Tel.: +86-10-89739125

摘要: 异质结构建已被证明是实现高效电荷分离和提高光催化性能的有效策略。在本研究中，基于元素掺杂和异质结构建的协同优化策略，通过简单的浸渍法构建了钛基金属有机框架(NH₂-MIL-125，简称NMT)与钠掺杂氮化碳(Na-CN)复合的S型异质结光催化剂(x% NMT/Na-CN)。通过Na的层内掺杂调节了催化剂的能带结构，引入氮缺陷提高了光生电荷的分离效率。此外，Na-CN与NMT的复合形成了S型异质结，进一步提高了光生电荷的分离效率，同时保留了复合催化剂的强氧化还原能力。得益于Na掺杂和NMT复合的协同效应，15% NMT/Na-CN在异丙醇溶液中的光催化H₂O₂产率高达2474.6 μmol g⁻¹ h⁻¹，未改性块状氮化碳的38倍。这项工作为基于掺杂-异质结协同优化策略实现氮化碳基光催化剂高效生产H₂O₂提供了一种新方法。

关键词:

氮化碳
/ MOF
/ 过氧化氢
/ S型异质结
/ 掺杂

English

Construction of NH₂-MIL-125/Na-doped g-C₃N₄ composite S-scheme heterojunction and its performance in photocatalytic hydrogen peroxide production

State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum, Beijing 102249, China

Corresponding author: Email: wangyajun@cup.edu.cn (Yajun Wang); Tel.: +86-10-89739125

Received Date: 17 June 2025
Accepted Date: 29 July 2025
Revised Date: 27 July 2025
Available Online: 15 February 2026

Abstract: Heterogeneous structure building has proven to be an effective strategy for achieving efficient charge separation and improving photocatalytic performance. In this study, based on the synergistic optimization strategy of elemental doping and heterostructure construction, an S-scheme heterojunction photocatalyst (x% NMT/Na-CN) composed of titanium-based metal-organic framework (NH₂-MIL-125, abbreviated as NMT) and sodium-doped carbon nitride (Na-CN) was constructed by a simple impregnation method. The energy band structure of the catalysts was modulated by intra-layer doping of Na, which introduced nitrogen defects and improved the separation efficiency of photogenerated charges. In addition, the composite of Na-CN and NMT formed an S-scheme heterojunction, which further improved the photogenerated charge separation efficiency while retaining the strong redox ability of the composite catalyst. Owing to the synergistic effect of Na doping and NMT composite, the photocatalytic H₂O₂ production rate of 15% NMT/Na-CN in isopropanol solution was as high as 2474.6 μmol g⁻¹ h⁻¹, which was 38 times higher than that of unmodified bulk carbon nitride. This work offers a novel approach to realize the efficient production of H₂O₂ from carbon nitride-based photocatalysts based on the doping-heterojunction synergistic optimization strategy.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

NH₂-MIL-125/Na掺杂g-C₃N₄复合S型异质结的构建及其光催化产过氧化氢性能

通讯作者: Email: wangyajun@cup.edu.cn (王雅君); Tel.: +86-10-89739125

English

Construction of NH₂-MIL-125/Na-doped g-C₃N₄ composite S-scheme heterojunction and its performance in photocatalytic hydrogen peroxide production

Corresponding author: Email: wangyajun@cup.edu.cn (Yajun Wang); Tel.: +86-10-89739125

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