摘要
采用一步室温搅拌法,以氧化石墨烯(GO)和AgNO3为原料,在不添加任何还原剂和形貌控制剂的条件下,利用GO和Ag^(+)的氧化还原电势差实现了银/氧化石墨烯(Ag/GO)纳米复合材料的绿色制备。采用SEM、TEM、FT-IR、XRD、UV-Vis、Raman和XPS对分别对所得Ag/GO纳米复合材料的形貌、结构进行了表征。产物中Ag纳米颗粒的平均粒径为6.5 nm,且在GO表面均匀分布。并以4-硝基苯酚的催化还原反应和甲基蓝的催化降解过程为模型考察了所制备的Ag/GO的催化性能。所得Ag/GO纳米复合材料在上述催化过程中表现优异,两个催化模型均遵循一级催化动力学反应规律,对应的一级催化动力学常数分别为0.8678和0.4105 min-1,均高于现有报道中的同类材料。本文所报道的材料制备方法绿色、简便,具有推广价值,所得材料催化性能优异,在工业催化和环保领域具有广阔的应用前景。
In this paper,silver/graphene oxide(Ag/GO)nanocomposite is obtained by a one-step green stirring method at room temperature with graphene oxide(GO)and AgNO3 as raw materials,and the redox potential difference between GO and Ag^(+)as the driving force.The morphology and structure of the obtained Ag/GO nanocomposite are characterized by SEM,TEM,FT-IR,XRD,UV-vis,Raman and XPS.The average size of Ag nanoparticles in the product is determined to be 6 nm,and they are uniformly distributed on the surface of GO.The catalytic performance of the prepared Ag/GO is investigated using the catalytic reduction reaction of 4-nitrophenol and the catalytic degradation process of methyl blue as models.The obtained Ag/GO nanocomposite has excellent performance in the above-mentioned catalytic process.Both catalytic models follow the first-order catalytic kinetic reaction law,and the corresponding first-order catalytic kinetic constants are 0.8678 and 0.4105 min-1 respectively,which are higher than similar materials in reported literatures.The preparation method of Ag/GO reported in this article is green,simple and has popularization value.The obtained material has excellent catalytic performance and has broad application prospects in the fields of industrial catalysis and environmental protection.
作者
韩兴威
潘慧莹
郭帅
HAN Xingwei;PAN Huiying;GUO Suai(School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China)
出处
《功能材料》
CAS
CSCD
北大核心
2021年第9期9114-9120,共7页
Journal of Functional Materials
基金
辽宁省博士启动基金资助项目(20180540031)。
作者简介
通讯作者:韩兴威(1988—),女,黑龙江拜泉人,博士,从事石墨烯基复合材料制备与应用研究,E-mail:hanxingwei0529@sina.com。
