Charge transfer kinetic analysis of S-scheme heterojunction by femtosecond transient absorption spectrum  

作　　者：Juntao Yan Jianjun Zhang 

机构地区：[1]College of Chemistry and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,China [2]Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,68 Jincheng Street,Wuhan 430078,China

出　　处：《Journal of Materials Science & Technology》2024年第26期18-21,共4页材料科学技术(英文版)

基　　金：supported by the National Natural Science Foun-dation of China(No.52202375);the International Postdoctoral Ex-change Fellowship Program(No.PC2022051);the China Post-doctoral Science Foundation(Nos.2021TQ0311 and 2021M702990).

摘　　要：An emerging S-scheme photocatalyst consisting of Ni-doped Zn_(0.2)Cd_(0.8)S quantum dots and TiO_(2)micro-spheres has been reported to show excellent H2 production performance and high benzylidene benzy-lamine evolution efficiency.To monitor the charge transfer dynamics in this S-scheme heterojunction,femtosecond transient absorption spectroscopy measurements are conducted.The charge transfer kinetic analysis confirms that S-scheme heterojunction promotes interfacial electron transfer and accelerates hole consumption.This work provides an in-depth explanation for the enhanced photocatalytic performance of S-scheme photocatalysts from the perspective of charge dynamics.

关 键 词：Electron transfer dynamics Ultrafast electron transfer Charge dynamics Electron quenching Lifetime 

分 类 号：O62[理学—有机化学]