Facile fabrication of CdIn_(2)S_(4)/TiO_(2)heterojunction for enhanced solar light efficient CO_(2)reduction  

作　　者：Xiaoyu Ma Longlong Wang Houde She Yu Zhou Lei Wang Jingwei Huang Qizhao Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China [2]School of Environment Science and Engineering,Chang’an University,Xi’an 710064,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第9期101-112,共12页化学科学与工程前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.21663027);the Key Research and Development Program of Gansu Province(Grant No.21YF5GA068);the Innovative Research Team for Science and Technology of Shaanxi Province(Grant No.2022TD-04);Industry Supporting Project for Gansu Institution of Higher Learning(Grant No.2021CYZC-26).

摘　　要：Photocatalytic CO_(2)reduction is a promising solution to simultaneously provide renewable chemical fuels and address the greenhouse effect.However,designing practical photocatalysts with advanced architectures remains challenging.Herein,we report the preparation of a novel CdIn_(2)S_(4)/TiO_(2)binary heterojunction via an in situ solvothermal approach,which exhibits superior photocatalytic activity for sunlight-driven CO_(2)reduction.The CdIn_(2)S_(4)/TiO_(2)composites exhibit significantly enhanced photocatalytic performance for CO_(2)reduction compared to unmodified TiO_(2).Among them,the 3%CdIn_(2)S_(4)/TiO_(2)composite has optimal CO and CH_(4) evolution rates of 18.32 and 1.03μmol·g^(–1)·h^(–1),respectively.The yield of CO is 4.7 times higher than that of pristine TiO_(2).This improved photocatalytic activity of the CdIn_(2)S_(4)/TiO_(2)heterostructure can be attributed to its large surface area,extended light absorption range and high separation efficiency of photogenerated electron-hole pairs,which are supported by the results of photoluminescence spectroscopy and the photoelectrochemical measurements.Moreover,the photocatalytic mechanism based on the binary CdIn_(2)S_(4)/TiO_(2)heterojunction is proposed and separation process of photogenerated electron-hole pairs is discussed.In brief,we aim to provide insights into the application of TiO_(2)in energy conversion processes through the construction of heterogeneous junctions.

关 键 词：TiiO_(2) CdIn_(2)S_(4) HETEROJUNCTION photocatalytic CiO_(2)reduction 

分 类 号：O64[理学—物理化学]