All-solid-state WO3/TQDs/In2S3 Z-scheme heterojunctions bridged by Ti3C2 quantum dots for efficient removal of hexavalent chromium and bisphenol A

被引：72

作者：

Yuan, Zhenting ^{[1
]}

Huang, Huoshuai ^{[1
]}

Li, Najun ^{[1
,2
]}

Chen, Dongyun ^{[1
,2
]}

Xu, Qingfeng ^{[1
,2
]}

Li, Hua ^{[1
,2
]}

He, Jinghui ^{[1
,2
]}

Lu, Jianmei ^{[1
,2
]}

机构：

[1] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

[2] Natl Ctr Int Res Intelligent New Nanomat & Detect, Suzhou 215123, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2021年 / 409卷

基金：

中国国家自然科学基金;

关键词：

Ti3C2; QDs; All-solid-state; Z-scheme; Photo-oxidation; Photo-reduction; TITANIUM CARBIDE MXENE; DRIVEN; CR(VI); PHOTOREDUCTION; COMPOSITES; VACANCIES;

D O I：

10.1016/j.jhazmat.2020.125027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ti3C2 quantum dots (TQDs) derived from ultrathin few-layered Ti3C2 nanosheets were served as the low-cost solid electron mediator of photogenerated carriers at the semiconductor interfaces, which could greatly reserve the reductive and oxidative reaction sites on the surface of heterojunctions and accelerate the reduction and oxidation reactions. The all-solid-state TQDs-bridge WO3/TQDs/In2S3 Z-scheme photocatalysts exhibited extremely promoted photocatalytic reduction of Cr (VI) and photocatalytic oxidation of Bisphenol A (BPA) under visible light irradiation, which are 4 and 3 times higher than that of WO3/In2S3 heterojunctions, respectively. The favorable photocatalytic activities of WO3/TQDs/In2S3 should attribute to the effective electron transfer and charges separation with introduction of TQDs as the electron mediators in the Z-scheme system. In addition, the stability of WO3/TQDs/In2S3 was investigated and the possible mechanisms during photo-reduction of Cr(VI) and photo-oxidation of BPA were proposed. This work provides a new strategy for fabrication of all-solid-state Z-scheme heterojunctions using Ti3C2 quantum dots as the low-cost solid electron mediator for efficient environmental remediation.

引用

页数：13

共 52 条

[1] Fabrication of BiFeO3-g-C3N4-WO3 Z-scheme heterojunction as highly efficient visible-light photocatalyst for water reduction and 2,4-dichlorophenol degradation: Insight mechanism [J].