Effects of water environmental factors on the photocatalytic degradation of sulfamethoxazole by AgI/UiO-66 composite under visible light irradiation
Effects of water environmental factors on the photocatalytic degradation of sulfamethoxazole by AgI/UiO-66 composite under visible light irradiation
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可见光照射下水环境因素对AgI/UiO-66复合材料光催化降解磺胺甲恶唑的影响
DOI：
10.1016/j.jallcom.2018.03.129
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发表时间：
2018-06
影响因子：
6.2
通讯作者：
Ao Yanhui
中科院分区：
文献类型：
--
作者：
Wang Chao;Xue Yao;Wang Peifang;Ao Yanhui
为了快速、简便地降解水环境中的有机污染物，有必要寻找可见光响应型光催化剂。本工作采用原位生长法制备了可见光响应型复合光催化剂AgI/UIO-66。以磺胺甲恶唑(SMZ)抗生素为目标污染物，考察了所制备的AgI/UIO-66复合材料在可见光照射下的光催化性能。结果表明，与纯AgI相比，AgI/UIO-66复合材料的光催化性能显著提高。考察了典型环境因素(即pH、无机盐离子和常见阴离子)对SMZ降解的影响。结果表明，除pH 2.5外，所考察的pH值(5.2、7.0、9.5)对SMZ的光催化降解均无明显影响，此时SMZ的降解率显著降低。此外，无机盐离子和水中的Cl-−、HCO3-−和SO42-−阴离子对SMZ的降解没有明显的影响。考察了水基质对SMZ降解的影响。在河水中，SMZ的去除效率与清洁水基质相比有所降低。自由基捕获实验证实，超氧阴离子自由基(DOTO2、−)和羟基自由基(DOTOH)是本工作中SMZ光催化降解的主要活性物种。最后，在中间体分析的基础上提出了SMZ的初步降解途径。
It is necessary to find visible light responsive photocatalysts for rapid and simple degradation of organic pollutants in water environment. In this work, a visible light responsive composite photocatalyst AgI/UiO-66 was prepared by an in situ growth method. Sulfamethoxazole (SMZ) antibiotic was selected as the target contaminant to probe the photocatalytic performance of the as-prepared AgI/UiO-66 composite under visible light irradiation. The results showed that the photocatalytic performance of the AgI/UiO-66 composite enhanced significantly compared to pure AgI. The effects of typical environment factors (i.e. pH, inorganic salt ions and common anions) on the degradation of SMZ were evaluated extensively. Results showed that the investigated pH (5.2, 7.0, 9.5) had no apparent effect on the photocatalytic degradation of SMZ except pH 2.5, at which the degradation rate of SMZ decreased significantly. In addition, inorganic salt ions and Cl−, HCO3−and SO42−anions in water exhibited no apparent effect on the degradation of SMZ. The effect of water matrix on the degradation of SMZ was also investigated. In the river water, the removal efficiency of SMZ was reduced compared with the cleaner water matrix. The capture experiments of radicals confirmed that superoxide radicals (radical dotO2−) and hydroxyl radicals (radical dotOH) were the main active species for the photocatalytic degradation of SMZ in the present work. Finally, the tentative degradation pathways of SMZ were proposed based on the intermediates analysis.
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影响因子：
2.8
作者：
Chunsheng Lei;Meng Pi;Xiaofeng Zhu;Pengfei Xia;Yingqing Guo;Fenge Zhang
通讯作者：
Chunsheng Lei;Meng Pi;Xiaofeng Zhu;Pengfei Xia;Yingqing Guo;Fenge Zhang
新型2D-2D p-n异质结BiOBr/La2Ti2O7复合光催化剂的合成，在紫外光和可见光照射下具有增强的光催化性能
影响因子：
22.1
作者：
Ao, Yanhui;Wang, Kedan;Hou, Jun
通讯作者：
Hou, Jun
影响因子：
3.3
作者：
Chavan, Sachin;Vitillo, Jenny G.;Bordiga, Silvia
通讯作者：
Bordiga, Silvia
影响因子：
9.9
作者：
Elmolla, Emad S.;Chaudhuri, Malay
通讯作者：
Chaudhuri, Malay
具有协同光催化活性的新型可见光驱动AgX/类石墨C3N4 (X = Br, I)杂化材料
影响因子：
22.1
作者：
Xu, Hui;Yan, Jia;Wan, Huilin
通讯作者：
Wan, Huilin