Novel biochar@CoFe2O4/Ag3PO4 photocatalysts for highly efficient degradation of bisphenol a under visible-light irradiation

被引：105

作者：

Zhai, Yali ^{[1
]}

Dai, Youzhi ^{[1
]}

Guo, Jing ^{[1
]}

Zhou, Lulu ^{[1
]}

Chen, Minxing ^{[1
]}

Yang, Hantong ^{[1
]}

Peng, Liangping ^{[1
]}

机构：

[1] Xiangtan Univ, Coll Environm & Resources, Dept Environm Sci & Engn, Xiangtan 911105, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2020年 / 560卷

关键词：

Biochar@CoFe2O4/Ag3PO4; Magnetic biochar; Magnetically separable; Visible light photocatalysis; Bisphenol A; ORGANIC POLLUTANTS DEGRADATION; FACILE SYNTHESIS; COMPOSITE; MICROSPHERES; MECHANISM; REMOVAL; PERFORMANCE; FABRICATION; DYE; PEROXYMONOSULFATE;

D O I：

10.1016/j.jcis.2019.08.065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the study, a series of novel Z-scheme biochar@CoFe2O4/Ag3PO4 photocatalysts were synthesized and employed to degrade bisphenol A under visible light irradiation (lambda >= 420 nm). The structural morphology, optical properties and physicochemical properties of composites were characterized by means of TEM, XRD, FT-IR, XPS, UV-Vis, BET, EIS and VSM analysis. The photocatalytic performances of the photocatalysts were evaluated systematically. The MBA-3 photocatalyst exhibited the highest photocatalytic and mineralization ability within 60 min among all photocatalysts, 91.12% and 80.23%, respectively. After four cycles, the degradation of BPA still kept the photocatalytic activity of 73.94%, and the removal rate of TOC remained 58.96%. Moreover, the active species in the photocatalytic process were evaluated, and we proposed the Z-scheme photocatalytic mechanism for highly efficient degradation of BPA. According to the GC-MS results, the photodegradation pathway of BPA is also suggested. The present study has provided a valuable way of using the magnetic biochar in the design of new and efficient system for the degradation of organic pollutions in waste water. (C) 2019 Published by Elsevier Inc.

引用

页码：111 / 121

页数：11

共 61 条

[1] Ag3PO4/CoFe2O4 magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants [J].