Ag-石墨烯的制备及修饰电极对对苯二酚的电催化氧化
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摘要
以石墨为原料,用改进的Hummers法制备了氧化石墨(GO),以葡萄糖为还原剂,采用一步还原法制备了Ag-石墨烯(Ag-Gr)纳米复合材料。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、热重分析(TGA)等手段对复合材料的结构及形貌进行了表征,并用循环伏安法考察了复合材料的电化学性能。结果表明:氧化石墨和银离子在葡萄糖的作用下,氧化石墨失去部分含氧官能团,被还原为石墨烯(Gr),银离子被还原为银纳米颗粒,均匀分布在石墨烯片层表面;在p H值为7.0,Ag-石墨烯浓度为2.5 mg/m L时,Ag-石墨烯修饰玻碳电极对对苯二酚具有良好的电催化氧化作用。
Graphite oxide( GO) was prepared by a modified Hummers method with the graphite as raw material,and the silver-graphene( Ag-Gr) nanocomposite was fabricated in one step using glucose as a reducing agent. The structure and morphology of the nanocomposite was characterized using X-ray diffraction( XRD),a scanning electron microscope( SEM),and thermogravimetric analysis( TGA). In addition,the electrochemical properties of the nanocomposite were investigated using cyclic voltammetry( CV). The results showed that GO was partially reduced to graphene( Gr),while Ag+was reduced to an Ag nanopartical and evenly distributed on the surface layer of graphene. The Ag-Gr nanocomposite-modified electrode has excellent electrocatalytic activity for the oxidation of hydroquinone with a p H of 7. 0 and the concentration of the Ag-Gr nanocomposite was 2. 5mg / m L.
Graphite oxide( GO) was prepared by a modified Hummers method with the graphite as raw material,and the silver-graphene( Ag-Gr) nanocomposite was fabricated in one step using glucose as a reducing agent. The structure and morphology of the nanocomposite was characterized using X-ray diffraction( XRD),a scanning electron microscope( SEM),and thermogravimetric analysis( TGA). In addition,the electrochemical properties of the nanocomposite were investigated using cyclic voltammetry( CV). The results showed that GO was partially reduced to graphene( Gr),while Ag+was reduced to an Ag nanopartical and evenly distributed on the surface layer of graphene. The Ag-Gr nanocomposite-modified electrode has excellent electrocatalytic activity for the oxidation of hydroquinone with a p H of 7. 0 and the concentration of the Ag-Gr nanocomposite was 2. 5mg / m L.
引文
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[3]Gilje S.,Han Song,Wang Minsheng,et al.A chemical route to graphene for device applications.Nano Letters,2007,7(11):3394-3398
[4]Hu Yaqi,Xue Zhonghua,He Hongxia,et al.Photoelectrochemical sensing for hydroquinone based on porphyrinfunctionalized Au nanoparticles on graphene.Biosensors and Bioelectronics,2013,47:45-49
[5]Lu Xiaoquan,Li Yan,Zhang Xia,et al.A simple and an efficient strategy to synthesize multi-component nanocomposites for biosensor applications.Analytica Chimica Acta,2012,711:40-45
[6]Yang Chunli,Chai Yaqin,Yuan Ruo,et al.Gold nanoparticle-graphene nanohybrid bridged 3-amino-5-mercapto-1,2,4-triazole-functionalized multiwall carbon nanotubes for the simultaneous determination of hydroquinone,catechol,resorcinol and nitrite.Analytical Methods,2013,5(3):666-672
[7]Su Biling,Tang Dianpipng,Li Qunfang,et al.Gold-silvergraphene hybrid nanosheets-based sensors for sensitive amperometric immunoassay of alpha-fetoprotein using nanogold-enclosed titania nanoparticles as labels.Analytica Chimica Acta,2011,692(1-2):116-124
[8]Liu Sen,Tian Jingqi,Wang Lei,et al.A method for the production of reduced graphene oxide using Benzylamine as a reducing and stabilizing agent and its subsequent decoration with Ag nanoparticles for enzymeless hydrogen peroxide detection.Carbon,2011,49(10):3158-3164
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[10]Pasricha R.,Gupta S.,Srivastava A.K.A facile and novel synthesis of Ag-graphene-based nanocomposites.Small,2009,5(20):2253-2259
[11]Das M.R.,Sarma R.K.,Borah S.C.,et al.The synthesis of citrate-modified silver nanoparticles in an aqueous suspension of graphene oxide nanosheets and their antibacterial activity.Colloids and Surfaces B:Biointerfaces,2013,105:128-136
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[15]黄克靖,余晟,王兰,等.石墨烯/铁氰化钴复合膜修饰玻碳电极同时测定对苯二酚、邻苯二酚和间苯二酚.化学学报,2012,70(6):735-740Huang Kejing,Yu Sheng,Wang Lan,et al.Simultaneous determination of hydroquinone,catechol and resor cinol based on graphene/cobalt hexacyanoferrate modified glassy carbon electrode.Acta Chimica Sinica,2012,70(6):735-740(in Chinese)
[16]Lee J.K.,Smith K.B.,Hayner C.M.,et al.Silicon nanoparticles-graphene paper composites for Li ion battery anodes.Chemical Communications,2010,46(12):2025-2027
[17]牛玉莲,金鑫,郑佳,等.石墨烯/钴镍双金属氢氧化物复合材料的制备及电化学性能研究.无机化学学报,2012,28(9):1878-1884Niu Yulian,Jin Xin,Zheng Jia,et al.Synthesis and electrochemical property of graphene/Co-Ni double hydroxides composites.Chinese Journal of Inorganic Chemistry,2012,28(9):1878-1884(in Chinese)
[18]Tian Jingqi,Liu Sen,Zhang Yingwei,et al.Environmentally friendly,one-pot synthesis of Ag nanoparticle-decorated reduced graphene oxide composites and their application to photocurrent generation.Inorganic Chemistry,2012,51(8):4742-4746
[19]于美,刘鹏瑞,孙玉静,等.石墨烯-银纳米粒子复合材料的制备及表征.无机材料学报,2012,27(1):89-94Yu Mei,Liu Pengrui,Sun Yujing,et al.Fabrication and characterization of graphene-Ag nanoparticles composites.Journal of Inorganic Materials,2012,27(1):89-94(in Chinese)
[20]范冰冰,郭焕焕,李稳,等.石墨烯/银纳米复合材料的制备及其影响因素研究.物理学报,2013,62(14):148101-1-148101-6Fan Bingbing,Guo Huanhuan,Li Wen,et al.Preparation and influencing factors of graphene-silver nanocomposites.Acta Physica Sinica,2013,62(14):148101-1-148101-6(in Chinese)
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[22]Shen Jianfeng,Hu Yizhe,Shi Min,et al.Fast and facile preparation of graphene oxide and reduced graphene oxide nanoplatelets.Chemistry of Materials,2009,21(15):3514-3520