A novel P-doped and NCDs loaded g-C_(3)N_(4) with enhanced charges separation for photocatalytic hydrogen evolution  

作　　者：Shuaiyang Zhang Yan Yang Yunpu Zhai Jiaqi Wen Meng Zhang Jingkun Yu Siyu Lu 

机构地区：[1]Green Catalysis Center,College of Chemistry,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Chemical Letters》2023年第4期172-177,共6页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 52122308, 21905253,51973200, U21A20329);the Natural Science Foundation of Henan(No. 202300410372);the Key Scientific Research Projects of Higher Education Institutions in Henan Province;China (No.21A150054)。

摘　　要：Graphite carbon nitride(g-C_(3)N_(4)) is a promising non-metal photocatalyst for photocatalytic hydrogen production, but its performance is still limited due to sluggish charges separation and low utilization of light.In this work, P-doped and N-doped carbon dots(NCDs) supported g-C_(3)N_(4)were successfully prepared via hydrothermal and polymerization reactions. The sub-bandgap formed by P-doping enhances the utilization of visible light, and the high electron density of P sites is conducive to the trapping of holes. NCDs also improve light utilization and, more importantly, act as electron acceptors and transporters to promote electron transport. The built-in electric field formed by the synergy of P-doping and NCDs-loading greatly promotes the separation of charges. The PCN/NCDs showed a significantly improved hydrogen evolution activity of 3731 μmol h^(-1)g^(-1), which was 6.7 times that of pure carbon nitride(560 μmol h^(-1)g^(-1)). This strategy may be generalized to the design of g-C_(3)N_(4)-based photocatalysts, facilitating the separation of charges for enhanced catalytic activity.

关 键 词：g-C_(3)N_(4) N-doped carbon dots P-DOPING PHOTOCATALYST Hydrogen evolution 

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]