Abstract
A serious of nitrogen-doped reduced graphene oxide/barium tungstate (NRGO/BaWO4) nanocomposites has been synthesized by microwave method and it was examined by the photocatalytic studies for the degradation of methylene blue (MB) dye under visible light irradiation. The as-synthesized catalysts were confirmed by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Photoluminescence Spectroscopy (PL) and Diffuse Reflectance Spectroscopy (DRS) techniques. The prepared nanocomposites are tested for its performance to the photodegradation of MB dye via illumination of 120 minutes under visible light source. Significantly, the 2.5%-NRGO-BaWO4 nanocomposite indicated that the highest photocatalytic activity under visible light source. The observed photocatalytic performances were ascribed to the synergetic effects of NRGO and BaWO4 and improved photogenerated electron-hole pairs charge separation efficiency. On the basis of the experimental results, we concluded that the new strategy of these types of photocatalytic property of NRGO/BaWO4 based binary nanocomposites materials can be a suitable candidate for the various environmental applications.
Highlights
Semiconductor photocatalysis has attracted interest of research community as it can solve environmental problems [1]
Based on the above facts, we report the synthesis of NRGO/BaWO4 nanocomposites via microwave method
The diffraction peaks corresponding to NRGO/BaWO4 nanocomposite can be indexed to scheelite type tetragonal crystal of BaWO4 (JCPDS No 43-0646) with space group I41/a indicating that incorporation of BaWO4 into NRGO matrix does not change the orientation and crystal structure of Scheelite BaWO4 [11]
Summary
Semiconductor photocatalysis has attracted interest of research community as it can solve environmental problems [1]. Several strategies have been developed to achieve the above said properties like doping, coupling with semiconductors and compositing with layered materials to improve the surface area [2]. Despite these efforts commercialization of these materials is yet to be realized. Designing materials with catalytical activity such as, high performance towards photodegradation would help in solving the environmental problems must be thoroughly considered Such catalysts will provide an economical way to serve several applications. The band gap has to be small which leads to higher recombination rate, the transport property is tuned by doping carbon containing species to improve the photocatalytic efficiency [7]. The reported material is highly efficient in photocatalytic degradation of MB dye under visible light irradiation
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