3D macropore carbon-vacancy g-C_(3)N_(4) constructed using polymethylmethacrylate spheres for enhanced photocatalytic H_(2) evolution and CO_(2) reduction

作     者：Xuewen Wang Qjuchan Li Lei Gan Xinfei Ji Fayun Chen Xinke Peng Rongbin Zhang Xuewen Wang;Qiuchan Li;Lei Gan;Xinfei Ji;Fayun Chen;Xinke Peng;Rongbin Zhang

作者机构：Key Laboratory of Jiangxi Province for Environment and Energy CatalysisThe College of ChemistryNanchang UniversityNanchang 330031JiangxiChina College of Chemistry and Environmental ScienceShangrao Normal UniversityShangrao 334001JiangxiChina Jiangxi Energy Sales Co.LtdNanchang 330031Jiangxi.China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第2期

页      面：139-146,I0006页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financial support from the National Natural Science Foundation of China (51862023, 51662030, 21868016) the Natural Science Foundation of Jiangxi Province (20171BAB206014, 2018BCD40004) 

主　　题：Carbon nitride Macropore Photocatalytic H_(2)evolution CO_(2)reduction 

摘      要：Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band ***, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates. In this study, the 3 D macropore C-vacancy g-C_3N_4 was prepared through a facile one-step route. Polymethylmethacrylate is used as a template to increase the surface reaction sites of g-C_3N_4 and extend its visible-light range. Compared to unmodified g-C_3N_4, the H2 production and CO_2 reduction rates of the fabricated g-C_3N_4 significantly improved. The special pore structure significantly improved the light utilization efficiency of g-C_3N_4 and increased the number of surface-active sites. The introduction of C-vacancy extended the absorption band of visible-light and suppressed the carrier recombination. The newly developed synthesis strategy can improve solar energy conversion efficiency and potentially modifies g-C_3N_4.