期刊
CHINESE JOURNAL OF CATALYSIS
卷 37, 期 8, 页码 1283-1292出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(16)62449-X
关键词
Sol-gel method; La-doping; Bismuth ferrite; Photocatalysis; Phenol
资金
- National Natural Science Foundation of China [21166015]
A series of BiFeO3 and lanthanum-doped BiFeO3 photocatalysts were synthesized by a facile sol-gel method using citric acid as complexing agent, and used to remove phenol in industrial wastewater under simulated sunlight irradiation. The samples were characterized by X-ray diffraction, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The introduction of La effectively suppressed the generation of an impurity phase. All the metals (La, Bi and Fe) are well distributed. Under simulated sunlight irradiation, the La-doped BiFeO3 photocatalysts exhibited superior photocatalytic activity to pure BiFeO3. The 15% La-doped BiFeO3 photocatalyst exhibited the best activity, with a degradation rate of 96% and COD removal rate of 81.53% after irradiation for 180 min, and it showed good recycling stability. The enhanced photocatalytic ability of 15% La-doped BiFeO3 was attributed to the increase of adsorbed surface hydroxyl groups, enhancement of visible light absorption and reduction of electron-hole recombination. We confirmed that the primary active species was (OH)-O-center dot by adding different scavengers during the photodegradation of phenol and proposed a reaction mechanism based on these experiments. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据