文献类型：会议论文

英文题名：Gamma irradiation assisted synthesis of Ag/rGO composites and their surface properties

作者：Liang, Ying[1]; Fang, Bin[1]; Lin, Fang Fang[1]; Zhu, Xu Min[1]

机构：[1] Institute of Nuclear Technology and Application, School of Science, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China

会议论文集：IUMRS International Conference in Asia - IUMRS-ICA 2016

会议日期：October 20, 2016 - October 24, 2016

会议地点：Qingdao, China

语种：英文

外文关键词：Graphene - Nanosheets - Synthesis (chemical) - X ray photoelectron spectroscopy - Irradiation - Surface plasmon resonance - Transmission electron microscopy - Gamma rays - Metal ions - Ultraviolet spectroscopy - Radiation chemistry - Scanning electron microscopy - Silver nanoparticles - X ray diffraction

摘要：Ag/rGO composites were synthesized under gamma irradiation using silver nitrate and graphene oxide (GO) as the starting materials. Comparing with traditional methods, gamma irradiation is a simple and "green" technique. In the irradiation system, silver ions were reduced to silver nanoparticles (AgNPs) by the electrons generated from the radiolysis of solvent. GO nanosheets provided reactive sites for the formation of AgNPs and acted as a colloidal surfactant preventing the aggregation of AgNPs. Meanwhile, GO were partially reduced to reduced graphene oxide (rGO). X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, Raman spectra and UV-Vis absorption spectra were applied for the characterization of Ag/rGO composites. The results showed that the absorbed dose (3.1 kGy, 4.7 kGy, 9.4 kGy and 27.4 kGy) plays an important role in the size distribution of AgNPs and the reduction degree of GO nanosheetes. The Ag/rGO composites exhibit a broad absorption band at visible light due to the surface plasmon resonance of AgNPs. Because of the unique surface properties, Ag/rGO composites behave enhanced performance for the adsorption of organic dye from water. ? 2017 Trans Tech Publications, Switzerland.