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Biogenic synthesis of a Ag–graphene.pdf
New J. Chem. (2015)
  • Mohammad Ehtisham Khan, School of Chemical Engineering Yeungnam University
Abstract
This paper reports an environmentally benign, simple, cost efficient, one-step, surfactant free, and
biogenic synthesis of a silver–graphene (Ag–graphene) nanocomposite using an electrochemically active
biofilm (EAB). The EAB was used for the reduction of Ag+ to Ag0 onto the graphene sheets. The morphology,
structure, composition, and optical properties and contact angle of the Ag–graphene were obtained using
a range of techniques which confirmed the anchoring/presence of silver nanoparticles (AgNPs) onto the
graphene sheets. The photocatalytic activity of Ag–graphene was evaluated by the degradation of methylene
blue and Congo red dye in aqueous solution at an ambient temperature in the dark and under visible-light
irradiation. The results showed that the photocatalytic activity of the Ag–graphene nanocomposite was
enhanced significantly by the loading of AgNPs in the graphene sheets. Contact angle measurements confirm
the hydrophilic nature of the Ag–graphene nanocomposite which is very helpful in photocatalysis. The electrical
conductivity and photocurrent measurements of the Ag–graphene nanocomposite exhibited a much better
performance than P–graphene. This study highlights the design of a novel facile synthetic route for a new
photocatalyst using the SPR of Ag and graphene as a support. The as-synthesized Ag–graphene nanocomposite
has potential applications in photocatalytic degradation, photoelectrodes and optoelectronic devices
Keywords
  • EAB,
  • AgNPs,
  • Graphene,
  • Ag-Graphene nanocomposite,
  • photocatalysis,
  • photoelectrochmical,
  • energy application
Disciplines
Publication Date
Spring August 4, 2015
Citation Information
Mohammad Ehtisham Khan. "Biogenic synthesis of a Ag–graphene.pdf" New J. Chem. (2015)
Available at: http://works.bepress.com/mohammadehtisham-khan/4/