Synergistic effect of phosphorus doping and MoS_(2) co-catalysts on g-C_(3)N_(4) photocatalysts for enhanced solar water splitting  

作　　者：Xunfu Zhou Pai Wang Meng Li Minfu Wu Bei Jin Jin Luo Meifeng Chen Xiaoqin Zhou Yanning Zhang Xiaosong Zhou 

机构地区：[1]School of Chemistry and Chemical Engineering,Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes,Lingnan Normal University,Zhanjiang,Guangdong 524048,China [2]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 611731,China [3]Electrochemical NanoEnergy Group,School of Chemical Engineering and Light Industry at Guangdong University of Technology,Guangzhou 510006,China [4]Department of Food Science Foshan Polytechnic,Foshan 528137,China

出　　处：《Journal of Materials Science & Technology》2023年第27期171-179,共9页材料科学技术（英文版）

基　　金：supported by Guangdong Basic and Ap-plied Basic Research Foundation(Nos.2021A1515110003 and 2020A1515110332);financial support from the National Natural Science Foundation of China(Nos.51974158 and 21902070);Scientific Research Projects of Key Disciplines in Guangdong Province(No.2019-GDXK-0023);Projects of“Leiyang Scholar”post plan of Lingnan Normal University(2021);Open Project of Key Laboratory of Chean Energy Material Chemistry in Guangdong General University(No.CEMC2022011).

摘　　要：Carbon nitride(g-C_(3)N_(4))is a promising metal-free and visible-light-responsive photocatalyst.However,its photocatalytic efficiency still suffers from high recombination rates of photoinduced charge carriers,slow kinetics of surface redox reactions,and relatively poor light absorption.Herein,a non-noble metal photocatalyst of MoS_(2) nanodots anchored on P-doped g-C_(3)N_(4) via in situ photodeposition was constructed.With the synergetic effect of the P-doping and MoS_(2) co-catalyst,the as-prepared P-doped g-C_(3)N_(4)/MoS_(2) catalyst has achieved efficient photocatalytic overall water splitting with a hydrogen evolution rate of 121.7μmol h−1 g−1.Experimental results and Density functional theory(DFT)simulations indicate that the enhanced photo-absorption capacity originates from the reduced band gaps by P doping.Meanwhile,the MoS_(2) reduces the overpotential of the water oxidation process and improves hydrogen adsorption capability in the hydrogen evolution reaction.This work can pave a new avenue to design and develop noble-metal-free water-splitting photocatalysts for future large-scale applications.

关 键 词：Synergistic effect Noble-metal-free photocatalyst P-DOPING MoS_(2)co-catalyst Water splitting g-C_(3)N_(4) 

分 类 号：TB33[一般工业技术—材料科学与工程]