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    • Keywords


      Ag@rGO nanocomposite; UV–visible; I–V characteristics; electrochemical measurement.

    • Abstract


      Silver-decorated reduced graphene oxide (Ag@rGO) nanocomposite was synthesized via a facile chemical reduction method, and its morphology, functional groups, structure, optical and electrical characteristics were investigated.Large distributions of spherical Ag nanoparticles with particle size ranging from 108 to 126 nm anchored into rGO sheets were observed. The energy dispersive X-ray confirms the presence of carbon, oxygen and silver elements in the Ag@rGO nanocomposite. Fourier-transform infrared spectrum exhibited stretching vibrations due to C=O, C–H$_2$, C–O,C=C, O–H and Ag–O bonds in Ag@rGO nanocomposite. X-ray diffraction results of Ag@rGO nanocomposite confirmthe formation of rGO and metallic Ag nanoparticles exhibiting FCC structure. The bandgap and ID/IG values of Ag@rGO nanocomposite were obtained as 2.76 and 1.49 eV respectively. Moreover, the study of electrochemical properties ofAg@rGO nanocomposite was carried out, where the maximum specific capacitance of 717.3 and 433.05 F g$^{-1}$ was achieved at 5 mV s$^{-1}$ scan rate and 1 A g$^{-1}$ current density. Moreover, the impedance spectroscopy study exhibited thecharge transfer resistance (R$_{CT}$) value as 6.98 and 71.29${\Omega}$ from the Nyquist and Bode plots. I–V characteristics curveshows that the addition of Ag into rGO increases its electrical conductivity. Thus, the results of Ag@rGO nanocompositecan be suitable for supercapacitor application.

    • Author Affiliations



      1. Department of Physics, National Institute of Technology Manipur, Imphal West 795004, India
    • Dates

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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