水热法制备石墨烯/二硫化钼复合物及其电化学性能的研究
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摘要
以氧化石墨烯分散液、硫代乙酰胺与水合钼酸铵为原料,采用水热法制备了石墨烯/二硫化钼复合物.通过扫描电镜(SEM)、红外光谱(FT-IR)、紫外可见光谱(UV-Vis)和X射线衍射分析(XRD)对复合物进行形貌及结构分析,发现石墨烯与二硫化钼形成团簇状复合物.循环伏安法(CV)等电化学测试表明:石墨烯的加入提高了石墨烯/二硫化钼复合物的比电容.当石墨烯与二硫化钼质量比为1∶1时,比电容最大为0. 47 F/g.
Graphene/molybdenum disulfide composites were prepared by hydrothermal method with graphene oxide aqueous dispersion, thioacetamide and ammonium molybdate as raw materials. The structure and morphology of the samples were characterized by SEM,FT-IR,UV-Vis,and XRD. It was found that the obtained graphene/molybdenum disulfied composites has been formed into clusters. Cyclic voltammetry(CV) and other electrochemical measurements showed that the specific capacitance of graphene/molybdenum disulfide composites increased with the addition of graphene. The highest specific capacitance of the composites was 0. 47 F/g,when the mass ratio of graphene to molybdenum disulfide was 1∶1.
Graphene/molybdenum disulfide composites were prepared by hydrothermal method with graphene oxide aqueous dispersion, thioacetamide and ammonium molybdate as raw materials. The structure and morphology of the samples were characterized by SEM,FT-IR,UV-Vis,and XRD. It was found that the obtained graphene/molybdenum disulfied composites has been formed into clusters. Cyclic voltammetry(CV) and other electrochemical measurements showed that the specific capacitance of graphene/molybdenum disulfide composites increased with the addition of graphene. The highest specific capacitance of the composites was 0. 47 F/g,when the mass ratio of graphene to molybdenum disulfide was 1∶1.
引文
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[2]RAO C N R,PISHARODY K P R.Transition Metal Sulfides[J].Progress in Solid State Chemistry,1976,10(4):207-270.
[3]WORSLEY M A,SHIN S J,MERRILL M D.Ultralow Density,Monolithic WS2,MoS2,and MoS2/Graphene Aerogels[J].ACS Nano,2015,9(5):4698-4705.
[4]BISSETT M A,KINLOCH I A,DRYFE R A.Characterization of MoS2 Graphene Composites for HighPerformance Coin Cell Supercapacitors[J].ACSAppl.Mater.Interfaces,2015,7(31):17388-17398.
[5]O'NEILL A O,KHAN U,COLEMAN J N.Preparation of High Concentration Dispersions of Exfoliated MoS2 with Increased Flake Size[J].Chem.Mater.,2012,24(12):2414-2421.
[6]CUNNINGHAM G,LOTYA M,CUCINOTTA C S,et al.Solvent Exfoliation of Transition Metal Dichalcogenides:Dispersibility of Exfoliated Nanosheets Varies Only Weakly between Compounds[J].Nano,2012,6(4):3468-3480.
[7]田野,何俣,尚静.水热法合成MoS2层状材料及其结构表征[J].化学学报,2004,62(18):1807-1810.
[8]HU L R,REN Y M,YANG H X,et al.Fabrication of 3D Hierarchical MoS2/Polyaniline and MoS2/CArchitectures for Lithium-Ion Battery Applications[J].ACS Appl.Mater.Interfaces,2014,6(16):14644-14652.
[9]ZHOU W J,ZHOU K,HOU D M,et al.Three-Dimensional Hierarchical Frameworks Based on MoS2Nanosheets Self-Assembled on Graphene Oxide for Efficient Electrocatalytic Hydrogen Evolution[J].ACS Appl.Mater.Interfaces,2014,6(23):21534-21540.
[10]GEIM A K,NOVOSELOV K S.The Rise of Graphene[J].Nat.Mat.,2007,6(3):183-191.
[11]BALANDIN A A,GHOSH S,BAO W Z,et al.Superior Thermal Conductivity of Single-Layer Graphene[J].Nano.Lett.,2008,8(3):902-907.
[12]LEE C,WEI X D,KYSAR J W,et al.Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene[J].Science,2008,321(5887):385-388.
[13]STANKOVICH S,DIKIN D A,DOMMETT G H.Graphene-based Composite Materials[J].Nature,2006,442(7100):282-286.
[14]韩雪松.MoS2电化学储能性能的研究[D].天津:天津理工大学,2013:47-48.