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 

机构地区：[1]Key Laboratory of Jiangxi Province for Environment and Energy Catalysis,The College of Chemistry,Nanchang University,Nanchang 330031,Jiangxi,China [2]College of Chemistry and Environmental Science,Shangrao Normal University,Shangrao 334001,Jiangxi,China [3]Jiangxi Energy Sales Co.,Ltd,Nanchang 330031,Jiangxi.China

出　　处：《Journal of Energy Chemistry》2021年第2期139-146,I0006,共9页能源化学（英文版）

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

摘　　要：Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band structure.However, 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.

关 键 词：Carbon nitride MACROPORE PHOTOCATALYTIC H_(2)evolution CO_(2)reduction 

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]