Tailoring S-scheme-based carbon nanotubes(CNTs)mediated Ag-CuBi_(2)O_(4)/Bi_(2)S_(3)nanomaterials for photocatalytic dyes degradation in the aqueous system  

作　　者：Vishal Dutta Anita Sudhaik Sonu Pankaj Raizada Archana Singh Tansir Ahamad Sourbh Thakur Quyet Van Le Van-Huy Nguyen Pardeep Singh 

机构地区：[1]School of Advanced Chemical Sciences,Shoolini University,Solan,Himachal Pradesh,173212,India [2]Department of Chemistry,University Centre for Research and Development,Chandigarh University,Gharuan,Mohali,Punjab,India [3]Advanced Materials and Processes Research Institute,Hoshangabad Road,Bhopal,462026,MP,India [4]Department of Chemistry,College of Science,King Saud University,Riyadh,Saudi Arabia [5]Department of Organic Chemistry,Bioorganic Chemistry and Biotechnology,Silesian University of Technology,B.Krzywoustego 4,44-100 Gliwice,Poland [6]Department of Materials Science and Engineering,Institute of Green Manufacturing Technology,Korea University,145,Anam-ro Seongbuk-gu,Seoul,02841,Republic of Korea [7]Faculty of Allied Health Sciences,Chettinad Hospital and Research Institute,Chettinad Academy of Research and Education,Kelambakkam,603103,Tamil Nadu,India

出　　处：《Journal of Materials Science & Technology》2023年第31期11-24,共14页材料科学技术（英文版）

基　　金：the Researchers Supporting Project number(No.RSP2023R6),King Saud University,Riyadh,Saudi Arabia.

摘　　要：In this study,S-scheme-based hydrothermal synthesis of Ag-CuBi_(2)O_(4)/CNTs/Bi_(2)S_(3)layered composites has been successfully reported.The photo-degradation of toxic dyes,viz.methyl orange(MO),and methylene blue(MB),has been used to examine nanocomposites with varying weight percent of Bi_(2)S_(3)for photocat-alytic activity in the visible range.Among candidates,Ag-CuBi_(2)O_(4)/CNTs/Bi_(2)S_(3)with a 10%loading of Bi_(2)S_(3)outperformed both pure and hybrid composites in photocatalytic activity.For MO degradation,the hybrid composite with 10%Bi_(2)S_(3)loading degrades 7.04 times higher than pristine CuBi_(2)O_(4)and Bi_(2)S_(3)samples,and for MB degradation,it degrades 4.96 times higher than pristine samples.High surface area,less re-combination rate of photogenerated charge carriers,photogenerated carriers faster separation,and high redox ability of Ag-CuBi_(2)O_(4)/CNTs/Bi_(2)S_(3)(10%)are all attributed to the improving photocatalytic perfor-mance.Even after ten cycles,the hybrid composite is chemically stable and reusable.Carbon nanotubes(CNTs)are a transfer bridge in layered structure for electrons because of their coordinated Fermi level between Ag-CuBi_(2)O_(4)and Bi_(2)S_(3).In addition,the scavenger and electron spin resonance(ESR)experiments verified that·O_(2)^(−),·OH,and h+were the important reactive species that successfully facilitated the pho-tocatalytic degradation process to degrade dyes.This study presents a straightforward and economical approach for obtaining a stable semiconductor-based photocatalytic system and a potential technique for future applications.

关 键 词：Ag-CuBi_(2)O_(4) Bi_(2)S_(3) Carbon nanotubes(CNTs) S-scheme charge transfer Dye degradation 

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]