The metallic 1T-WS_(2)as cocatalysts for promoting photocatalytic N_(2) fixation performance of Bi_(5)O_(7)Br nanosheets  

作　　者：Pengyuan Qiu Jianwei Wang Zhangqian Liang Yanjun Xue Yanli Zhou Xiaoli Zhang Hongzhi Cui Guiqing Cheng Jian Tian 

机构地区：[1]School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]School of Environmental and Material Engineering,Yantai University,Yantai 264005,China [3]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Chemical Letters》2021年第11期3501-3504,共4页中国化学快报（英文版）

基　　金：funding from the National Natural Science Foundation of China(Nos.51872173 and 51772176);Taishan Scholars Program of Shandong Province(No.tsqn201812068);Higher School Youth Innovation Team of Shandong Province(No.2019KJA013);Science and Technology Special Project of Qingdao City(No.20-3-4-3-nsh).

摘　　要：Recently,widespread attention has been devoted to the typical layered BiOCl or BiOBr because of the suitable nanostructure and band structure.However,owing to the fast carrier recombination,the photocatalytic performance of BiOX materials is not so satisfactory.Loading 1T phase WS_(2)nanosheets(NSs)onto Bi_(5)O_(7)Br NSs can improve the photocatalytic N_(2)fixation activity.Among these,the obtained 1T-WS_(2)@Bi_(5)O_(7)Br composites with optimum 5%1T-WS_(2)NSs display a significantly improved photocatalytic N_(2)fixation rate(8.43 mmol L^(−1)h^(−1)g^(−1)),2.51 times higher than pure Bi_(5)O_(7)Br(3.36 mmol L^(−1)h^(−1)g^(−1)).And the outstanding stability of 1T-WS_(2)@Bi_(5)O_(7)Br-5 composites is also achieved.Exactly,the photoexcited electrons from Bi_(5)O_(7)Br NSs are quickly transferred to conductive 1T phase WS_(2)as electron acceptors,which can promote the separation of carriers.In addition,1T-WS_(2)NSs can provide abundant active sites on the basal and edge planes,which can promote the efficiency of photocatalytic N_(2)fixation.This work offers a novel solution to improve the photocatalytic performance of Bi_(5)O_(7)Br NSs.

关 键 词：Photocatalytic N_(2)fixation Bi_(5)O_(7)Br IT phase WS_(2) Electron-hole pairs Photocatalytic performance 

分 类 号：TQ113.26[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]