非常规CeO2-WO3光催化剂降解水中邻苯酚杀菌剂

R. Fiorenza, Stefano Andrea Balsamo, S. Sciré
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引用次数: 0

摘要

由于农药、药物和/或增塑剂等新出现的污染物造成的水污染是一个严重的环境问题,与人类和生态系统生命的安全密切相关。因此,开发用于水净化的高性能(光)催化剂至关重要。近年来,高级氧化工艺(AOPs)的协同效应可以更好地去除水中的难降解性污染物。在本次竞赛中,比较了光催化、Fenton和类Fenton工艺对ceo2 - wo2材料降解邻苯酚杀菌剂的(光)催化活性。以六亚甲基四胺(HMTA)为表面活性剂,通过沉积-沉淀法制备了样品。采用拉曼光谱、紫外-可见漫反射光谱(UV-Vis DRS)、x射线光电子能谱(XPS)、N2吸附-解吸光谱和透射电子显微镜(TEM)对材料的化学物理性质进行了表征。(照片)催化测量是通过一个由太阳能灯照射的自制光反应器进行的。用紫外-可见光谱法测定了杀菌剂的降解情况。在CeO2和WO2氧化物之间形成了一个高效的异质结,采用太阳能光- fenton -like反应提供了良好的农药降解率(65%),是三种AOPs中性能最好的工艺。wo3在CeO2上的加入促进了Ce和W离子之间的离子交换,提高了氧化铈的氧化还原性能。CeO2和WO3之间的强相互作用以及这种非常规复合材料的特殊性能为其作为一种有前途的水净化材料铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Degradation of the o-phenylphenol fungicide in water by unconventional CeO2-WO3 photocatalysts
Water pollution due to emerging contaminants such as pesticides, pharmaceutics and/or plasticizers, is a serious environmental problem strictly connected to the safety of human and ecosystem life. For this reason, the development of high-performing (photo)catalysts for water purification is crucial. In recent years, the synergistic effects in Advanced Oxidation Processes (AOPs) can perform better strategies to remove recalcitrant contaminants from water. In this contest, the (photo)catalytic activity of CeO2-WO2materials for the degradation of the orto-phenylphenol fungicide comparing the photocatalytic, the Fenton and the photo-Fenton-like processes, has been examined. The samples were synthetized through deposition-precipitation mediated with the hexamethylenetetramine (HMTA) surfactant. The chemico-physical properties of the materials were examined by Raman, UV-Vis Diffuse Reflectance (Uv-vis DRS) and X-Ray photoelectron (XPS) spectroscopies, N2 adsorption-desorption measurements and transmission electron microscopy (TEM). The (photo)catalytic measurements were made through a home-made photoreactor irradiated by a solar lamp. The degradation of the fungicide was measured by UV-vis spectroscopy. An efficient heterojunction was formed between the CeO2 and the WO2 oxides, which provided a good degradation percentage of the pesticide (65%) employing the solar photo-Fenton-like reaction that was the best performing process among the three investigated AOPs. The addition of WO3on CeO2 facilitated the ionic exchange between the Ce and the W ions, boosting the redox properties of cerium oxide. The strong interaction between CeO2 and WO3 and the peculiar properties of this unconventional composite pave the way to its use as a promising material for water depollution.
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