Multi-channel photogenerated charge transfer in double S-scheme for promoting photostability and mineralization of pollutants  

作　　者：Runlin Chen Lifeng Li Yufeng Gong Hongming Lou Yuxia Pang Dongjie Yang Xueqing Qiu 

机构地区：[1]School of Chemistry and Chemical Engineering,Guangdong Provincial Key Lab of Green Chemical Product Technology,State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China [2]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Journal of Materials Science & Technology》2024年第35期67-81,共15页材料科学技术(英文版)

基　　金：funded by the National Natural Science Foun-dation of China(Nos.U21A20309 and 21978106);the Fundamental Research Funds for the Central Universities(No.2022ZYGXZR108).

摘　　要：Superior photo-mineralization of pollutants,outstanding charge separation efficiency and exceptional photostability of catalysts constitute three pivotal factors for the effective photodegradation of organic pollutants.In this study,a dual S-scheme In2 O3/Pedot/In2 S3(IO/Pedot/IS),inspired by natural photosyn-thesis,was successfully synthesized for the degradation of lignin and antibiotics.The resulting exceptional semiconductor contact creates a dual-interface electric field on Pedot,facilitating multi-channel charge transport and enhancing charge separation efficiency.The establishment of the dual S-scheme hetero-junction raised the reduction-oxidation potential of the type-II In2 O3/In2 S3.When subjected to 5 W LED irradiation for 60 min,IO/Pedot-2/IS demonstrated a remarkable mineralization rate of 85.8%for sodium lignosulfonate(SL),surpassing the 53.7%mineralization rate achieved by IO/IS.Furthermore,the degra-dation efficiency for tetracycline(TC)and ciprofloxacin(CIP)reached 91%and 88%,respectively.Crucially,the hole(h+)conductivity of Pedot efficiently alleviated the photocorrosion of sulfide,ensuring robust cyclic stability.Experimental simulations of natural photocatalysis showcased the exceptional versatility and applicability of IO/Pedot/IS.In-depth analysis led to the proposal of a potential photodegradation pathway for lignin,based on the intermediates detected through liquid chromatography-mass spectrom-etry(LC-MS).Overall,this study presents an effective strategy for the efficient photocatalytic treatment of organic pollutants.

关 键 词：PHOTODEGRADATION Lignin Pedot PHOTOCORROSION Double S-scheme 

分 类 号：TB3[一般工业技术—材料科学与工程]