Photoelectrocatalyzed degradation of organophosphorus pesticide fenamiphos using WO3 nanorods as photoanode
Photoelectrocatalyzed degradation of organophosphorus pesticide fenamiphos using WO3 nanorods as photoanode
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DOI：
10.1016/j.chemosphere.2019.125677
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发表时间：
2020-05-01
期刊：
影响因子：
8.8
通讯作者：
Garcia-Anton, J.
中科院分区：
文献类型：
--
作者：
Rosello-Marquez, G.;Fernandez-Domene, R. M.;Garcia-Anton, J.
本研究利用电化学阳极氧化技术制备了WO 3纳米结构，并将其应用于农药灭线磷等持久性有机物的降解。在阳极氧化期间使用的酸电解质是两种不同的：1.5 M H2SO 4 -0.05 M H2 O2和1.5 M CH 4 O3 S-0.05 M H2 O2。一旦样品被制造出来，它们就会受到不同的测试，以分析纳米结构的特性。用场发射扫描电子显微镜（FESEM）对样品进行了形貌观察，用拉曼光谱研究了样品的组成和结晶度，用光电化学阻抗谱（PEIS）研究了样品的光电化学行为。最后，降解试验已经进行了使用的技术称为光电催化（PEC）。在该技术中应用的条件是1V-Ag/AgCl的电势和模拟太阳照射。通过紫外可见分光光度法和高效液相色谱法对降解过程进行监测，控制实验进程。用1.5 M CH 4 O3 S-0.05 M H2 O2电解质获得的纳米结构显示出比用1.5 M H2SO 4 -0.05 M H2 O2合成的纳米结构更好的光电化学行为。在实验2 h时，灭线磷被降解，在PEC实验1 h时，发现中间产物的形成。(C)2019爱思唯尔有限公司版权所有。
In this study, WO3 nanostructures were synthesized by the electrochemical anodization technique to use them on the degradation of persistent organic compounds such as the pesticide fenamiphos. The acids electrolyte used during the anodization were two different: 1.5 M H2SO4-0.05 M H2O2 and 1.5 M CH4O3S-0.05 M H2O2. Once the samples have been manufactured, they have been subjected to different tests to analyze the properties of the nanostructures. With Field Emission Scanning Electron Microscopy (FESEM) the samples have been examined morphologically, their composition and crystallinity has been studied through Raman Spectroscopy and their photoelectrochemical behaviour by Photoelectrochemical Impedance Spectroscopy (PEIS). Finally, degradation tests have been carried out using the technique known as photoelectrocatalysis (PEC). The conditions that were applied in this technique were a potential of 1 V-Ag/AgCI and simulated solar illumination. The degradation process was monitored by UV-Visible and High-Performance liquid Chromatography (HPLC) to control the course of the experiment. The nanostructures obtained with 1.5 M CH4O3S-0.05 M H2O2 electrolyte showed a better photoelectrochemical behaviour than nanostructures synthesized with 1.5 M H2SO4-0.05 M H2O2. The fenamiphos degradation was achieved at 2 h of experiment and the intermediate formation was noticed at 1 h of PEC experiment. (C) 2019 Elsevier Ltd. All rights reserved.