Boosting photocatalytic hydrogen production via interfacial engineering over a Z-scheme core/shell heterojunction  

作　　者：Bing Luo Jinghua Li Wei Wang Chaoqian Ai Haihan Zhang Yuxin Zhao Dengwei Jing 

机构地区：[1]School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,China [2]International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Nano Research》2023年第1期352-359,共8页纳米研究（英文版）

基　　金：This work was financially supported by the National Key Research and Development Program of China(No.2018YFB1502000);the National Natural Science Foundation of China(Nos,62074123 and 52106270);the PetroChina Innovation Foundation(No.2019D-5007-0410);the Young Talent Support Plan of Xi'an Jiaotong University(No.7121191202);the Natural Science Foundation of Shaanxi Province(No.2021JQ-040);the China Postdoctoral Science Foundation(No.2020M683472).

摘　　要：Designing high efficacy photocatalysts is a promising way to improve solar fuel production efficiency.In this work,we prepared a core/shell composite of loose ZnCr layered double hydroxide nanosheets modified CdS nanorods for efficient visible light driven photocatalytic hydrogen production.The highest hydrogen production rate achieved 425.8μmol·h^(−1) without adding any noble metal cocatalyst under the visible light stimulus,which is 22.4 times that of 1 wt.%Pt-modified CdS.The corresponding apparent quantum yield is 13.9%at 420 nm.It is revealed that the synergistic actions of the interfacial redox shuttle of Cr^(3+)/Cr^(δ+)and the interfacial electric field enable the efficient separation of photoinduced charge carriers between two components via a Z-scheme energy band configuration.Meanwhile,with the hydrogen evolution contribution of Zn^(2+),a remarkable improvement in photocatalytic performance was achieved in contrast to bare CdS.This work provides an effective methodology to construct highly efficient and economically viable photocatalysts for solar H_(2)production and mechanistic study.

关 键 词：photocatalysis HETEROJUNCTION interfacial engineering noble metal free hydrogen production 

分 类 号：O644.1[理学—物理化学]