氧化石墨烯负载金纳米颗粒及其催化活性研究

摘要

在不外加任何还原剂的情况下,利用氯金酸和氧化石墨烯之间的氧化还原反应将金纳米颗粒成功负载到氧化石墨烯上,合成了金纳米颗粒/氧化石墨烯复合材料.利用透射电镜(TEM)和X-射线衍射(XRD)对复合材料进行了结构表征与形态分析,并研究了金纳米颗粒/氧化石墨烯复合材料对Suzuki-Miyaura偶联反应的催化效果.结果表明,通过调节氯金酸与氧化石墨烯的质量比,可以得到不同形状的金纳米颗粒；金纳米颗粒/氧化石墨烯复合材料对Suzuki-Miyaura偶联反应具有很高的催化活性,并且很容易从反应体系中回收.%Au nanoparticles were successfully synthesized and loaded onto graphene oxide(GO) sheets by a redox reaction between HAuC14 and GO nanosheets without adding any additional reductant.The Au/GO nano-composites were characterized by transmission electron microscopy(TEM) and X-ray diffraction(XRD).Thecatalytic performance of Au/GO for Suzuki-Miyaura coupling reaction was studied.The experimental resultsshowed that the Au nanoparticles with different shape could be obtained by adjusting the mass ratio of HAuCl4 to GO.The Au/GO nanocomposites showed superior catalytic activity for Suzuki-Miyaura coupling reaction and they could be easily removed from the reaction system after use.