Ingenious Design of Co Al-LDH p-n Heterojunction Based on CuI as Holes Receptor for Photocatalytic Hydrogen Evolution  

作　　者：Yue Cao Hongqian Gou Pengfei Zhu Zhiliang Jin 

机构地区：[1]School of Chemistry and Chemical Engineering,Key Laboratory for Chemical Engineering and Technology,State Ethnic Affairs Commission,Ningxia Key Laboratory of Solar Chemical Conversion Technology,North Minzu University,Yinchuan 750021,China [2]School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第6期79-85,共7页结构化学（英文）

基　　金：financially supported by the National Natural Science Foundation of China(22062001)。

摘　　要：Reasonable design of heterojunction can greatly improve the photocatalytic hydrogen evolution activity of materials.Herein,p-n heterojunction of 2D/3D structure is constructed by the nanosheet of CoAl-LDH and rock-like CuI.The introduction of CuI can make CoAl-LDH disperse better,which brings more reaction sites for the hydrogen evolution reaction.Meanwhile,the 2D/3D structure is conducive to the construction of p-n heterojunction between the CoAl-LDH and CuI.The optical and electrochemical properties of the material indicate that the separation and transference of photon-generated carriers are promoted by the p-n heterojunction.The activity of composite catalyst(CI-10)reaches a maximum of 3.59 mmol g^(−1) h^(−1) which is 28.5 times higher than that of CuI.Furthermore,the influence of the amount of CuI and pH value on the hydrogen evolution reaction is explored.Based on the band structures of CoAl-LDH and CuI,the mechanism of photocatalytic reaction of CI-10 is proposed.The p-n heterojunction constructed with the CuI as hole receptor provides a new way to enhance the activity of photocatalytic H_(2) evolution.

关 键 词：CoAl-LDH CUI p-n heterojunction photocatalysis hydrogen production 

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]