气液界面自组装还原氧化石墨烯薄膜
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摘要
为了获得优异性能的还原氧化石墨烯薄膜电极,以氧化石墨烯分散液为原料、聚乙烯亚胺为粘结剂,采用气液界面自组装法制备了氧化石墨烯薄膜,利用氢碘酸还原得到还原氧化石墨烯薄膜电极。通过扫描电子显微镜、原子力显微镜、X射线衍射仪和X射线光电子能谱仪对薄膜电极进行了表征。结果表明:还原氧化石墨烯薄膜具有良好的表面形貌、均匀的厚度且还原后的碳氧比达到了10.2。当氧化石墨烯分散液浓度为1.5 mg/mL时,还原氧化石墨烯薄膜电极的电导率达到495.44 S/cm。为石墨烯薄膜在微纳电子器件电极材料的应用方面提供了重要的实验依据。
In order to obtain the reduced graphene oxide film electrodes with superior performance,graphene oxide films were prepared by a method of self-assembled at a liquid-air interface with graphene oxide dispersion as raw material,polyethylene imine as binder. The reduced graphene film electrodes were obtained by hydroiodic acid. The film electrodes were characterizated using scanning electron microscopy,atomic force microscopy image,X-ray diffraction and X-ray photoelectron spectroscopy. The results showed that the reduced graphene films had good surface morphologies,uniform thickness and a carbon to oxygen atomic ratio of the reduced graphene films can achieve 10. 2 after HI acid reduction. When the concentration of GO dispersion was 1. 5 mg/ml,the reduced graphene film electrodes had an electrical conductivity as high as 495. 44 Scm~(-1). This study provides experimental basis for the application of electrode materials in micro/nano electronic devices.
In order to obtain the reduced graphene oxide film electrodes with superior performance,graphene oxide films were prepared by a method of self-assembled at a liquid-air interface with graphene oxide dispersion as raw material,polyethylene imine as binder. The reduced graphene film electrodes were obtained by hydroiodic acid. The film electrodes were characterizated using scanning electron microscopy,atomic force microscopy image,X-ray diffraction and X-ray photoelectron spectroscopy. The results showed that the reduced graphene films had good surface morphologies,uniform thickness and a carbon to oxygen atomic ratio of the reduced graphene films can achieve 10. 2 after HI acid reduction. When the concentration of GO dispersion was 1. 5 mg/ml,the reduced graphene film electrodes had an electrical conductivity as high as 495. 44 Scm~(-1). This study provides experimental basis for the application of electrode materials in micro/nano electronic devices.
引文
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[3]SCHEDIN F,GEIM A K,MOROZOV S V,et al.Detection of Individual Gas Molecules Adsorbed on Graphene[J].Nat.Mater,2007(6):183-191.
[4]NOVOSELOV K S,GEIM A K,MOROZOV S V,et al.Electric Field Effect in Atomically Thin Carbon Films[J].Science,2004(22):666-669.
[5]REINA A,JIA X T,HO J,et al.,Large Area,Few-layer Graphene Film on Arbitrary Substrates by Chemical Vapor Deposition[J].Nano Letters,2009,9(1):30-35.
[6]KIM K S,ZHAO Y,JANG H,et al.Large-scale Pattern Growth of Graphene Film for Strechable Transparent Elecrodes[J].Nature,2009(457):707-710.
[7]PEI S F,CHENG H M.The Reduction of Graphene Oxide[J].Carbon,2012(50):3210-3228.
[8]PEI S F,ZHAO J P.Direct Reduction of Graphene Oxide Films into Highly Conductive and Flexible Graphene Films by Hydrohalic Acids[J].Carbon,2010(48):4466-4474.
[9]GUO Y L,DI C A,LIU Y T,et al.,General Routw toward Patterning of Graphene Oxide by a Combination of Wettability Modulation and Spin-coating[J].ACS Nano,2010,4(10):5749-5754.
[10]EDA G,FANCHINI G,CHHOWALLA M.Large-area Ultrathin Film of Reduced Graphene Oxide as a Trasparent and Flexible Electronic Material[J].Nature Nanotechnology,2008,3(5):270-274.
[11]BISWAS S J,DRIZAL L T.A Novel Approach to Create a Highly Ordered Monolayer Film of Graphene Nanosheets at the Liquid-liquid Interface[J].Nano Letters,2009,9(1):167-172.
[12]LV W,XIA Z G,WU S D,et al.Conductive Graphene-based Macroscopic Membrane Self-assembled at a Liquid-air Interface[J].Mater.Chem.2011(21):3359-3364.
[13]刘杰,王彬,石瑞英,等。用静电自组装法制备的石墨烯薄膜特性研究[J].光散射学报,2014,26(2):159-163.
[14]CHEN C M,YANG Q H,et al.Self-assembled Free-standing Graphite Oxide Membrane[J].Adv.Mater.,2009(21):3007-3011.
[15]王艳,张伟花.自组装制备氧化石墨烯薄膜的研究[J].电池,2003,33(5):330-332.
[16]LI D,MULLER M B,GILJE S,et al.,Processable Aqueous Dispersions of Graphene Nanosheets[J].Nat Nanoteclmol,2008(3):101-105.
[17]WU Z S,PARVEZ K,FENG X L,Klaus MULLEN K,et al.,Photolithographic Fabrication of High-performance All-solid-state Graphene-based Planar Micro-supercapacitors with Different Interdigital Fingers[J].J.Mater.Chem.A,2014(2):8288-8293.
[18]LIU C G,YU Z N,et al.,Graphene-based Supercapacitor with an Ultrahigh Energy Density[J].Nano Lett,2010(10):4863-4868.
[19]HYUNMIN H W,PILJAE J,MOON S K,et al.,Highly Tunable Charge Transport in Layer-by-Layer Assembled Graphene Transistors[J].ACS Nano,2012,6(3):2432-2440.
[20]WU Z S,PARVEZ K.Graphene-based In-plane Micro-supercapacitors with High Power and Energy Densities[J].Nature Communications,2013(4):1-8.