In-suit fabricating an efficient electronic transport channels via S-scheme polyaniline/Cd_(0.5)Zn_(0.5)S heterojunction for rapid removal of tetracycline hydrochloride and hydrogen production  

作　　者：Yan Xiao Yinhua Jiang Ershuai Zhou Wenli Zhang Yan Liu Jianming Zhang Xiangyang Wu Qi Qi Zhanchao Liu 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China [2]Institute of Environmental Health and Ecological Security,School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China [3]School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China [4]Foshan(Southern China)Institute for New Materials,Foshan 528200,China [5]School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

出　　处：《Journal of Materials Science & Technology》2023年第22期205-218,共14页材料科学技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos.21777062,22178151 and 51872128);National&Local Joint Engineering Research Center for Mineral Salt Deep Utilization of Huaiyin Institute of Technology (Nos.SF202008,SF202204 and SF202106);Guangdong Basic and Applied Basic Research Foundation (No.2021A1515111231).

摘　　要：The development of highly efficient catalyst is the key for photocatalytic technology to deal with water pollution and energy problems.In this work,the S-scheme polyaniline/Cd_(0.5)Zn_(0.5)S(PANI/CZS)nanocomposites were elaborately prepared for the first time by in-situ oxidation polymerization.Compared to pure PANI and Cd_(0.5)Zn_(0.5)S,this PANI/CZS hybrid displayed outstanding photocatalytic performance in removing tetracycline hydrochloride(TCH)and hydrogen evolution under light irradiation.Among them,15 PANI/CZS sample could achieve 84.9%TCH degradation efficiency within 25 min,and the degradation rate(0.06931 min−1)was 5.13 times than that of Cd_(0.5)Zn_(0.5)S(0.0135 min^(−1)).The optimal photocatalytic H_(2) evolution rate of 30 PANI/CZS sample was 15.57 mmol g^(-1) h^(-1),which was twice that of Cd_(0.5)Zn_(0.5)S(7.34 mmol g^(-1) h^(-1)).These results were mainly attributed to the efficient electronic transport channels provided by S-scheme heterojunction structure.The density functional theory(DFT)calculation proved that the difference of work function resulted in band bending and forming built-in electric field on the contact interface of PANI/CZS,which facilitated the migration and separation of interfacial photogener-ated charge carriers for the strengthened photocatalytic performance.Further,the degradation interme-diate products and pathways of TCH were also put forwarded in depth based on MS experiment.At last,the S-scheme electron transport model and the photocatalytic reaction mechanism in PANI/CZS hetero-junction structure were studied.This work provided an innovative vision in developing high-performance S-scheme heterojunction multifunctional photocatalysts.

关 键 词：S-scheme heterostructure Cd_(0.5)Zn_(0.5)S PANI H_(2)evolution TCH photodegradation 

分 类 号：TG139.8[一般工业技术—材料科学与工程]