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Graphene-metal nanocomposites are the best candidates for the greater sensitivity for various applications. We have prepared Graphene-Tin Oxide (G/SnO2) nanocomposite by using facile eco-friendly Anton-Paar microwave synthesis reactor method. X-ray diffraction patterns revealed the formation of G/SnO2 nanocomposite. The scanning electron microscopy and transmission electron microscopy images show a uniform distribution of nano-needles on the graphene surface and the average particle size was found to be in the range of 3-5 nm. The G/SnO2 composite shows an enhanced optical property, i.e., tunability in the band of pristine SnO2 nanoparticles while in contacted with graphene. The dielectric properties of the G/SnO2 nanocomposite were measured in the frequency ranges of 75Hz to 4MHz and real value of dielectric constant is found to be 1200, which is quite larger than that of pristine SnO2 nanoparticle, i.e., 12. Further, AC conductivity analysis revealed that the G/SnO2 is two orders conductive than the pristine SnO2. This work may offer an effective and economically viable for the preparation of graphene/metal-oxide nanocomposites for various applications.

Microwave Assisted Synthesis of Graphene/SnO2 Nanocomposite and its Structural, Dielectric and Electrical Properties