物理化学学报 >> 2026, Vol. 42 >> Issue (4): 100175.doi: 10.1016/j.actphy.2025.100175

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MOF衍生的g-C3N4/ZnIn2S4 S型异质结:界面工程增强光催化NO转化

邱艳平1, 张佳桐1, 李林萍1, 高旸钦1, 李宁1,2,*(), 戈磊1,2,*()   

  1. 1 中国石油大学(北京)新能源与材料学院, 重质油国家重点实验室, 北京 102249
    2 中国山东省东营市利津县循环经济产业园, 东营国安化工有限公司, 山东 东营 257400
  • 收稿日期:2025-07-19 修回日期:2025-08-22 录用日期:2025-08-25 发布日期:2026-01-29
  • 通讯作者: Email: gelei08@sina.com (戈磊)wubian.good@163.com (李宁)

MOF-derived g-C3N4/ZnIn2S4 S-scheme heterojunction: interface-engineering enhanced photocatalytic NO conversion

Yanping Qiu1, Jiatong Zhang1, Linping Li1, Yangqin Gao1, Ning Li1,2,*(), Lei Ge1,2,*()   

  1. 1 State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing 102249, China
    2 Dongying Guoan Chemical Co., Ltd, Circular Economy Industrial Park, Lijin County, Dongying 257400, Shandong Province, China
  • Received:2025-07-19 Revised:2025-08-22 Accepted:2025-08-25 Published:2026-01-29
  • Contact: Email: gelei08@sina.com (Ge Lei)wubian.good@163.com (Li Ning)

摘要:

为应对大气中日益严峻的氮氧化物(NOx)污染问题,亟需开发兼具高效性与高选择性的光催化剂。本研究构建了g-C3N4/ZnIn2S4 (CN/ZIS) S型异质结光催化剂,其中通过MOF衍生策略合成了具有中空管状形貌的ZnIn2S4,g-C3N4则作为高效电子转移平台。优化后的CN/ZIS-0.1在可见光照射下表现出显著提升的光催化性能,NO去除效率达67.29%,显著高于原始g-C3N4 (41.41%)和ZIS (27.8%);同时NO向硝酸盐的选择性转化率达到77.47%,亦明显优于g-C3N4 (49.01%)。材料表征结果表明,CN/ZIS-0.1不仅有更宽的光吸收范围,其独特结构还提供了更多反应位点。光电化学测试与DFT计算进一步证实,CN/ZIS界面形成的内建电场(BIEF)驱动光生电子向g-C3N4表面迁移、空穴向ZIS表面定向迁移,从而促进关键活性物种生成并增强NO吸附。本工作不仅证明了MOF衍生中空结构与二维半导体耦合构建S型异质结在NO光催化氧化中的潜力,还为开发高选择性NO光催化剂提供有效策略。

关键词: 光催化, NO转化, g-C3N4/ZnIn2S4异质结, 界面工程, S型异质结

Abstract:

Addressing the growing challenge of nitrogen oxides (NOx) pollution in the atmosphere requires the development of photocatalysts with both high efficiency and strong selectivity. In this study, a g-C3N4/ZnIn2S4 (CN/ZIS) S-scheme heterojunction photocatalyst was constructed, in which ZnIn2S4 with a hollow tubular morphology was synthesized via a MOF-derived strategy, and g-C3N4 served as an efficient electron transfer platform. The optimized CN/ZIS-0.1 exhibited remarkable photocatalytic efficacy under visible-light radiation, attaining a NO removal efficiency of 67.29%, markedly surpassing that of pristine g-C3N4 (41.41%) and ZIS (27.8%). Additionally, a high NO-to-nitrate selectivity of 77.47% was attained, exceeding that of pristine g-C3N4 (49.01%). The material characterization results revealed that CN/ZIS-0.1 not only has a wider light absorption range but also its unique structure provides more reaction sites. Further photoelectrochemical measurements and DFT simulations confirm that the built-in electric field (BIEF) formed at the CN/ZIS interface facilitates the directional migration of photogenerated electrons towards the g-C3N4 surface, and photogenerated holes migrate towards the surface of ZIS, thereby promoting the generation of key reactive species and enhancing NO adsorption. This work not only demonstrates the potential of constructing S-scheme heterojunctions by coupling MOF-derived hollow structures with two-dimensional semiconductors for NO oxidation, but also offers an effective strategy for developing highly selective NO photocatalysts.

Key words: Photocatalysis, NO conversion, g-C3N4/ZnIn2S4 heterojunction, Interface engineering, S-scheme