The p-n heterojunction-engineered Bi2MoO6/KNbO3 with 2D/3D architecture for enhanced photocatalytic activity towards benzene-containing contaminants under visible light illumination

被引：11

作者：

Liu, Chen ^{[1
]}

He, Xi ^{[1
,2
,3
]}

Fan, Yuhan ^{[1
]}

Li, Jun ^{[1
]}

He, Xinxia ^{[1
]}

Chen, Ming ^{[1
,4
,5
]}

机构：

[1] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China

[2] Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China

[3] Chongqing Jiaotong Univ, Chongqing 400074, Peoples R China

[4] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China

[5] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2022年 / 10卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Multi-targeted removal; Benzene-containing contaminants; 2D/3D p-n heterojunction; Photocatalytic; Visible light; RHODAMINE-B; WASTE-WATER; DEGRADATION; REMOVAL; NANOSTRUCTURES; NANOPARTICLES; CONSTRUCTION; PERFORMANCE; ADSORPTION; EXCITATION;

D O I：

10.1016/j.jece.2022.108302

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

It is extremely challenging for multi-targeted removal of benzene-containing contaminants (BCCs) due to their complex structure. Here, we successfully fabricate a novel two-dimensional (2D)/three-dimensional (3D) Bi2MoO6/KNbO3-3 (the molar ratio of Bi2MoO6 to KNbO3 is controlled at 1:3) p-n heterojunction through in-situ growth method, which can effectively degrade both typical BCCs: rhodamine B (RhB, 91.3% in 60 min) and oxytetracycline hydrochloride (OTC-HCl, 80.7% in 90 min). Bi2MoO6/KNbO3-3 exhibits great stability after four cycles with low metal ions leaching (< 0.34 ppm). The possible degradation pathways of typical BCC are proposed with the combination of N-de-ethylation, chromophore cleavage and mineralization, 14 intermediates are clarified. Three-dimensional excitation-emission matrix fluorescence spectra (3D EEMs) are conducted to grasp the overall change of OTC-HCl. Moreover, Bi2MoO6/KNbO3-3 can simultaneously degrade coexisted BCCs (RhB, malachite green and methylene blue) in real surface water under visible light illumination with the removal rates of 85.8%, 97.7% and 97.7%, respectively. This work provides a novel strategy for multi-targeted removal of BCCs in real surface water, and demonstrates that the structure of 2D/3D p-n heterojunction can effectively limit the leaching of metal ions which will avoid the potential secondary pollution.

引用

页数：13