title: Hydrothermal preparation of reduced graphene oxide-silver nanocomposite using Plectranthus amboinicus leaf extract and its electrochemical performance.
abstract: Graphene based nanocomposites are receiving increasing attention in many fields such as material chemistry, environmental science and pharmaceutical science. In this study, a facial synthesis of a reduced graphene oxide-silver nanocomposite (RGO-Ag) was carried out from Plectranthus amboinicus leaf extract. The synthesized nanocomposite was characterized by using X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscope and UV-vis spectroscopy for structural confirmation. The reduction of graphene oxide and silver ions was achieved simultaneously due to the reducibility of the Plectranthus amboinicus leaf extract. We further investigated the electrochemical properties of the biosynthesized RGO-Ag nanocomposite. A nonenzymatic H2O2electrochemical sensor was shown to be successfully fabricated by using biosynthesized RGO-Ag nanocomposite. Moreover, the fabricated electrochemical sensor also showed good selectivity.
authors.affiliation: Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong.
authors.forename: Aiwu
authors.initials: A
authors.lastname: Wang
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong.
authors.forename: Wen
authors.initials: W
authors.lastname: Cai
authors.affiliation: Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Peng
authors.affiliation: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, PR China. Electronic address: liuzhong@isl.ac.cn.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China. Electronic address: lifugyt@gmail.com.
authors.forename: Li
authors.initials: L
authors.lastname: Fu
mesh_terms: D001709:Biotechnology; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D055772:Green Chemistry Technology; D053768:Metal Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism; D031346:Plectranthus / Q000378:metabolism*; D012834:Silver / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D010936:Plant Extracts; D012834:Silver; D006108:Graphite
keywords: Biosynthesis; Graphene; H(2)O(2) sensor; Plectranthus amboinicus; Silver nanocomposite