Fabrication of ZnO-ZnS@polyaniline nanohybrid for enhanced photocatalytic degradation of 2-chlorophenol and microbial contaminants in wastewater
Fabrication of ZnO-ZnS@polyaniline nanohybrid for enhanced photocatalytic degradation of 2-chlorophenol and microbial contaminants in wastewater
复制标题
DOI：
10.1016/j.ibiod.2016.10.018
复制
发表时间：
2017-04-01
影响因子：
4.8
通讯作者：
Barakat, M. A.
中科院分区：
文献类型：
--
作者：
Anjum, Muzammil;Oves, Mohammad;Barakat, M. A.
本文合成了一种可见光活性半导体光催化剂ZnO-ZnS@ Pani（ZnO-ZnS@Pani），并将其应用于光催化降解水中有机物和微生物污染物。采用X射线衍射、场发射扫描电子显微镜、傅里叶变换红外光谱、紫外-可见漫反射光谱、拉曼光谱和X射线光电子能谱对材料的形貌和结构特征进行了分析。研究了ZnO-ZnS@Pani在可见光照射下降解模拟废水中2-氯苯酚（2-CP）的光催化活性，考察了接触时间、pH值和污染物初始浓度对2-CP光催化活性的影响。当污染物浓度为50 mg/L、WI为0.5时，2-CP的降解率最高可达89%。催化剂剂量。由于ZnO-ZnS@Pani纳米复合材料中的聚苯胺对可见光有较宽的吸收范围，增加了电子/空穴的分离，从而实现了有效的降解。此外，该催化剂表现出高的稳定性，并保持其光催化活性的最高水平，即使在多次重复使用。此外，ZnO-ZnS@Pani在阳光下对水中粪便E.线圈，其中与ZnO-ZnS相比，观察到13.4%的效率。这些结果表明ZnO-ZnS@Pani是一种有效的可见光催化剂，可用于废水的净化。(C)2016爱思唯尔有限公司版权所有
In this work, a visible light active semiconductor photocatalyst ZnO-ZnS@polyaniline (ZnO-ZnS@Pani) nanocomposite was synthesized and its application was investigated for the photocatalytic degradation of organic and microbial contaminants in aqueous solution. The morphology and structural characteristics of the prepared materials were analysed using X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, ultraviolet visible diffuse reflectance spectroscopy, Raman analysis and X-ray photoelectron spectroscopy. The photocatalytic activity of ZnO-ZnS@Pani was investigated for the degradation of 2-chlorophenol (2-CP) in synthetic wastewater under visible light irradiation as a function of contact time, pH and initial pollutant concentration. The highest 89% degradation of 2-CP was achieved at the pollutant concentration of 50 mg/L and 0.5 WI. catalyst dose. The efficient degradation was achieved due to the polyaniline in ZnO-ZnS@Pani nanocomposite which absorbs a wide range of visible light and inceases the eletron/hole separation. Moreover, the catalyst showed high stability and retained its photocatalytic activity up to the maximum level even after multiple reuses. Furthermore, ZnO-ZnS@Pani showed excellent antimicrobial action in sunlight against water born fecal E. coil, where 13.4% more effectiveness was observed as compared to ZnO-ZnS. These results revealed that ZnO-ZnS@Pani is an efficent visible light catalyst and can be used for the decontamination of wastewater. (C) 2016 Elsevier Ltd. All rights reserved.