Visible-light-driven photocatalytic degradation of non-azo dyes over Ag2O and its acceleration by the addition of an azo dye

Visible-light-driven photocatalytic degradation of non-azo dyes over Ag2O and its acceleration by the addition of an azo dye
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Ag2O 上可见光驱动的光催化降解非偶氮染料及其通过添加偶氮染料加速降解

DOI:
10.1016/j.jece.2018.04.047
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发表时间:
2018-04
影响因子:
7.7
通讯作者:
Bin Liang
Bin Liang
中科院分区:
工程技术2区
文献类型:
--
作者:
Na Bi;Hanxiao Zheng;Yingming Zhu;Wei Jiang;Bin Liang

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在这项研究中,我们发现,使用氧化银作为可见光驱动的光催化剂的非偶氮染料的光降解加速通过添加的偶氮染料。加入甲基橙子后,罗丹明B和亚甲基蓝的光降解时间分别从50 min和20 min缩短到18 min和8 min。这种加速是不敏感的偶氮染料和溶液pH值的类型。结果表明,这种加速可以归因于Ag2O和偶氮物种的协同效应。在Ag2O上的偶氮物种的光降解的中间体具有苯胺,磺胺酸,苯酚型结构,这些物种促进非偶氮有机物的光分解。该催化剂在染料废水的光降解处理中具有良好的应用前景。
In this study, we reveal that the photodegradation of non-azo dyes using Ag2O as a visible-light-driven photocatalyst is accelerated by the addition of an azo dye. Upon addition of methyl orange, the time taken for the photodegradation of Rhodamine B and methylene blue was significantly shortened from 50 to 18 min and from 20 to 8 min, respectively. This acceleration is not sensitive to the type of azo dye and solution pH. The results indicate that this acceleration can be ascribed to the synergistic effect of the Ag2O and azo species. The intermediates of the photodegradation of the azo species over Ag2O have aniline-, sulfanilic-acid-, and phenol-type structures, and these species promote the photodecomposition of the non-azo organics. This acceleration has promising applications in dye wastewater photodegradation treatment.
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发表时间: 2003-03
影响因子: 4.3
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