Photo-Fenton like degradation of tetrabromobisphenol A with graphene-BiFeO3 composite as a catalyst
Photo-Fenton like degradation of tetrabromobisphenol A with graphene-BiFeO3 composite as a catalyst
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石墨烯-BiFeO3复合材料催化光芬顿降解四溴双酚A
DOI：
10.1016/j.cej.2013.01.013
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发表时间：
2013-03-01
影响因子：
15.1
通讯作者：
Tang, Heqing
中科院分区：
文献类型：
--
作者：
An, Junjian;Zhu, Lihua;Tang, Heqing
采用溶胶-凝胶法制备了石墨烯-BiFeO_3纳米复合材料，并在可见光照射下对其进行了类Fenton光催化性能的评价。石墨烯-BiFeO_3复合材料的比表面积为35.07 m(2)g(-1)，明显大于BiFeO_3纳米粒子的比表面积(7.50 m(2)g(-1))。焙烧温度、石墨烯含量和溶液pH值对复合材料具有良好的可见光Fenton催化活性。在最佳的可见光照射条件下，石墨烯-BiFeO3复合材料对四溴双酚A的表观降解速率常数为1.19min(-1)，分别是BiFeO3和BiFeO3/石墨烯混合物的5.43倍和3.68倍。与BiFeO_3相比，石墨烯BiFeO_3复合材料的可见光-Fenton类催化性能显著增强，这归因于它具有较大的比表面积、较大的吸附容量和较强的电子传递能力。(C)2013爱思唯尔B.V.保留所有权利。
Graphene-BiFeO3 nanoscaled composites were prepared with a sol-gel method and evaluated as highly efficient photo-Fenton like catalyst under visible light irradiation. The graphene-BiFeO3 composite had a specific surface area of 35.07 m(2) g(-1), being considerably larger than that of BiFeO3 nanoparticles (7.50 m(2) g(-1)). The composite exhibited excellent visible light-Fenton like catalysis activity, being influenced by calcination temperature, graphene content and solution pH value. Under optimal conditions with visible light irradiation, the graphene-BiFeO3 composite yielded fast degradation of tetrabromobisphenol A with a apparent rate constant of 1.19 min(-1), which was 5.43 and 3.68 folds of that achieved by using BiFeO3 and the mixture of BiFeO3 and graphene, respectively. The significantly enhanced visible light-Fenton like catalytic properties of the graphene BiFeO3 composite in comparison with that of BiFeO3 was attributed to a large surface area, much increased adsorption capacity and the strong electron transfer ability of graphene in the composite. (C) 2013 Elsevier B.V. All rights reserved.