S-Scheme Bi2S3/CdS Nanorod Heterojunction Photocatalysts with Improved Carrier Separation and Redox Capacity for Pollutant Removal

被引：37

作者：

Zhang, Yiming ^{[1
,2
,3
]}

Jin, Zhouzheng ^{[1
,2
]}

Liu, Dan ^{[4
,5
]}

Tan, Zaitian ^{[4
]}

Mamba, Bhekie B. ^{[5
]}

Kuvarega, Alex T. ^{[5
]}

Gui, Jianzhou ^{[1
,2
,4
,5
]}

机构：

[1] Tiangong Univ, Tianjin Key Lab Green Chem Technol & Proc Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China

[2] Tiangong Univ, Sch Mat Sci & Engn, Tianjin 300387, Peoples R China

[3] Lanzhou Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

[4] Tiangong Univ, Sch Chem & Chem Engn, Tianjin 300387, Peoples R China

[5] Univ South Africa, Coll Sci Engn & Technol, Nanotechnol & Water Sustainabil Res Unit, ZA-1710 Johannesburg, South Africa

来源：

ACS APPLIED NANO MATERIALS | 2022年 / 5卷 / 04期

基金：

中国国家自然科学基金;

关键词：

S-scheme; Bi2S3/CdS; photocatalytic; Cr(VI); CIP; CHARGE SEPARATION; HYDROGEN; CDS; HETEROSTRUCTURE; REDUCTION; PERFORMANCE; FABRICATION; EFFICIENCY; COMPOSITE; NANOSHEETS;

D O I：

10.1021/acsanm.2c00446

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Constructing step scheme (S-scheme) heterojunctions makes it possible for promoting the separation and transfer of photoinduced carriers, as well as maintaining strong photoredox capacities. Herein, S-scheme Bi2S3/CdS heterojunctions were designed and constructed by the in situ substitution of Bi3+ on CdS nanorods. The S-scheme 10%-Bi2S3/CdS heterojunction with intense interfacial contacts shows not only an optimal photoreduction rate toward Cr(VI) (3.18 and 7 times that of pure CdS and Bi2S3, respectively) but also a high photodegradation rate of ciprofloxacin (1.94 and 8.75 times that of pure CdS and Bi2S3, respectively). Meanwhile, the S-scheme 1096-Bi2S3/CdS heterojunction could efficiently prevent itself from photoetching. It is confirmed that the S-scheme 10%-Bi2S3/CdS heterojunction is produced by a built-in electric field between CdS and Bi2S3, which not only improves the charge transfer and separation efficiencies but also maintains strong redox capacities. The present study will provide distinguished insight into fabricating an S-scheme heterojunction with strong photoredox capabilities for the removal of pollutants.

引用

页码：5448 / 5458

页数：11

共 58 条

[31] One-pot fabrication of 2D/2D HCa2Nb3O10/g-C3N4type II heterojunctions towards enhanced photocatalytic H2evolution under visible-light irradiation [J].