Solar photocatalytic degradation of methyl orange over La0.7Sr0.3MnO3 nano-perovskite
Solar photocatalytic degradation of methyl orange over La0.7Sr0.3MnO3 nano-perovskite
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DOI：
10.1016/j.seppur.2014.07.022
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发表时间：
2014-09-25
影响因子：
8.6
通讯作者：
Malekzadeh, Azim
中科院分区：
文献类型：
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作者：
Ghiasi, Mahnaz;Malekzadeh, Azim
采用柠檬酸盐法成功合成了钙钛矿型纳米La0.7Sr0.3MnO3。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和粒度分析仪（PSA）对产物进行了表征。研究了在可见光催化剂La0.7Sr0.3MnO3的水悬浮液中，在不同的条件下（包括催化剂用量、溶液pH值以及电子受体过氧化氢、过硫酸钾和过氧化氢-尿素）对有机污染物模型物甲基橙子（MO）的降解。发现MO在酸性溶液中或在过硫酸钾作为氧化剂的存在下更有效地降解。研究了MO的吸附等温线和光催化降解动力学。催化剂的重复使用性也进行了研究。(C)2014爱思唯尔有限公司版权所有。
Nanosized La0.7Sr0.3MnO3 perovskite has successfully synthesized via citrate method. The product was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and particle size analyzer (PSA). The degradation of methyl orange (MO), as a model of organic pollutant, was investigated in aqueous suspensions of La0.7Sr0.3MnO3, as a visible-light photocatalyst, under a variety of conditions comprising amount of catalyst mass, pH of solution and the presence of electron acceptors of hydrogen peroxide, potassium persulphate, or hydrogen peroxide-urea. The MO was found to degrade more efficiently in acidic solution or in the presence of potassium persulphate as oxidant. The adsorption isotherm and the kinetic of photocatalytic degradation of MO were investigated. Reusability of the catalyst was also investigated. (C) 2014 Elsevier B.V. All rights reserved.