Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (1): 276-282.doi: 10.1007/s40242-025-5106-9

• Research Articles • Previous Articles     Next Articles

Molecular-doped Precursor Derived Porous g-C3N4 for Photocatalytic H2 Production

ZHAI Binjiang1, JIANG Yuzhou1,2, ZONG Shichao3,4, WANG Mingzhi1, WANG Zixin1, JIN Hui1, LIU Yanbing1, KANG Xing1, SHI Jinwen1   

  1. 1. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China;
    2. Huaneng Shaanxi Power Generation Co., Ltd, Xi'an 710075, P. R. China;
    3. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710054, P. R. China;
    4. Key Laboratory of Eco-hydrology and Water Security in Arid and Semiarid Regions of the Ministry of Water Resources, Chang'an University, Xi'an 710054, P. R. China
  • Received:2025-05-22 Online:2026-02-01 Published:2026-01-28
  • Contact: ZONG Shichao,E-mail:shichaozong@chd.edu.cn;JIN Hui,E-mail:jinhui@mail.xjtu.edu.cn;SHI Jinwen,E-mail:jinwen_shi@mail.xjtu.edu.cn E-mail:shichaozong@chd.edu.cn;jinhui@mail.xjtu.edu.cn;jinwen_shi@mail.xjtu.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (No. 2022YFB3803600), the Key Research and Development Program of Shaanxi Province, China (No. 2024GX-YBXM-459), the Natural Science Basic Research Program of Shaanxi Province, China (No. 2023-JC-QN-0618), the Natural Science Foundation of Sichuan Province, China (No. 2025ZNSFSC1250), the Shaanxi Postdoctoral Science Foundation, China (No. 2023BSHYDZZ126), and the Fundamental Research Funds for the Central Universities, China.

Abstract: Molecular design of novel precursors represents a strategic approach to mitigating severe charge recombination in g-C3N4. Distinct from conventional high-temperature thermal polymerization, this work develops novel precursors through lowtemperature hydrothermal assembly of melamine-cyanuric acid supramolecule with hexamethylenetetramine doping. After the calcination of modified precursors, the obtained g-C3N4 has a porous structure and an ultra-high specific surface area. Advanced characterizations confirm the reduced layer stacking, the disrupted π-π conjugated structure, and critically, the accelerated charge transport efficiency. Remarkably, the modified g-C3N4 achieves a 22 times enhancement in visible-light-driven hydrogen evolution (λ>400 nm) compared to pristine g-C3N4, which is among the highest improvements reported for supramolecular modified g-C3N4 systems. This molecular engineering strategy for precursors establishes a new approach to designing high-performance photocatalysts.

Key words: Graphite carbon nitride, Photocatalysis, Hydrogen, Supramolecule