Synchronous photosensitized degradation of methyl orange and methylene blue in water by visible-light irradiation

被引：43

作者：

Chen, Peng ^{[1
,2
]}

Liang, Yumeng ^{[2
]}

Xu, Yifeng ^{[2
]}

Zhao, Yunliang ^{[1
]}

Song, Shaoxian ^{[1
]}

机构：

[1] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

[2] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2021年 / 334卷

基金：

中国国家自然科学基金;

关键词：

Methyl orange; Methylene blue; Photosensitized degradation; Visible-light irradiation; PHOTOCATALYTIC ACTIVITY; COMPOSITE; OXIDATION; HYDROGEN; G-C3N4;

D O I：

10.1016/j.molliq.2021.116159

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 this work, a novel method that homogeneous degrading methyl orange (MO) with methylene blue (MB) as a photosensitizer under visible-light irradiation is proposed. MO can be efficiently degraded at a wide concentration range, and its degradation rate is significantly promoted by increasing MB concentration. The result of EPR, LC-MSMS, TOC and ion chromatography reveals that the degradation mechanism of MO consists two parts: O-1(2) mediated Type II pathway and Type I photosensitization of involving direct electron transfer between (MB)-M-3* and MO. Furthermore, benefitting from the self-degradation of MB, synchronous removal of MO and MB in water can be realized by controlling the initial MB concentration in system, thus avoiding the problems faced by heterogeneous photocatalytic such as solid-liquid separation. Therefore, this cost-effective and easy method possesses great potential in the application of eliminating MO and MB from wastewater as well as provides a new strategy for sustainable water treatment. (C) 2021 Published by Elsevier B.V.

引用

页数：8

共 37 条

[1] Inexpensive and quick photocatalytic activity of rare earth (Er, Yb) co-doped ZnO nanoparticles for degradation of methyl orange dye [J].