Efficient photocatalytic H_(2) evolution over tubular mesoporous carbon nitride with N-vacancy by microwave-assisted synthesis  

作　　者：Yuanlong Pan Qiang Zhang Guangzheng Huang Yannan Luo Honglin Gao 

机构地区：[1]School of Materials and Energy,National Center for International Research on Photoelectric and Energy Materials,Yunnan University,Kunming 650091,China

出　　处：《Science China Chemistry》2025年第3期866-873,共8页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (22369024)。

摘　　要：Modifying the microstructure of photocatalysts while simultaneously introducing vacancies has shown significant potential in enhancing their performance for hydrogen production.Herein,a novel tubular mesoporous carbon nitride(TMCN)with nitrogen vacancies was fabricated using a microwave-assisted synthesis strategy,employing melamine-cyanuric acid supramolecular(MC-S)as the precursor.The optimized TMCN exhibited an outstanding H_2 production rate,approximately 29 times higher than that of pristine g-C_(3)N_(4).The N-vacancies serve as sites for reactant adsorption and activation,leading to enhanced delocalization of HOMO-LUMO.Furthermore,the porous structures of TMCN facilitate the reactant diffusion,while its tubular architectures promote the oriented transfer of charge carriers.Crucially,the markedly improved photocatalytic performance of TMCN can be predominantly attributed to the synergistic effects arising from its superior structure and N-vacancy defects.This work opens new possibilities for the simultaneous formation of surface defect states as photocatalytic reaction sites and distinctive structures conducive to charge carrier transport.

关 键 词：g-C_(3)N_(4) microwave synthesis N-vacancies SUPRAMOLECULAR hydrogen production 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]