Fe3O4@graphene oxide composite: A magnetically separable and efficient catalyst for the reduction of nitroarenes
Fe3O4@graphene oxide composite: A magnetically separable and efficient catalyst for the reduction of nitroarenes
复制标题
Fe3O4@氧化石墨烯复合材料：一种可磁分离的高效硝基芳烃还原催化剂
DOI：
10.1016/j.materresbull.2013.01.038
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发表时间：
2013-05-01
影响因子：
5.4
通讯作者：
Chen, Haiqun
中科院分区：
文献类型：
--
作者：
He, Guangyu;Liu, Weifeng;Chen, Haiqun
报道了一种简便的共沉淀法制备高活性的Fe3O4@石墨烯氧化物(Fe3O4@GO)复合催化剂，并用X射线衍射仪、傅里叶变换红外光谱、透射电子显微镜和N-2(中心点)吸附-脱附测试对其进行了表征。结果表明，Fe3O4纳米粒子(Fe3O4 NPs)均匀致密地沉积在氧化石墨烯(GO)薄膜上，纳米粒子的直径约为12 nm。首次探索了制备的Fe3O4@GO复合催化剂对一系列硝基芳烃的还原活性，其转化频率(TOF)为3.63min(-1)，是商用Fe3O4纳米粒子的45倍。催化剂用量和水合肼用量均低于文献报道。此外，复合催化剂具有磁可分性和高稳定性，易于回收。(C)2013爱思唯尔有限公司。保留所有权利。
We reported a facile co-precipitation method to prepare a highly active Fe3O4@graphene oxide (Fe3O4@GO) composite catalyst, which was fully characterized by means of X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and N-2(center dot) adsorption-desorption measurements. The results demonstrated that the Fe3O4 nanoparticles (Fe3O4 NPs) with a small diameter of around 12 nm were densely and evenly deposited on the graphene oxide (GO) sheets. The as-prepared Fe3O4@GO composite was explored as a catalyst to reduce a series of nitroarenes for the first time, which exhibited a great activity with a turnover frequency (TOF) of 3.63 min(-1), forty five times that of the commercial Fe3O4 NPs. The dosages of catalyst and hydrazine hydrate are both less than those reported. Furthermore, the composite catalyst can be easily recovered due to its magnetic separability and high stability. (C) 2013 Elsevier Ltd. All rights reserved.