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A facile microwave approach to synthesize RGO-BaWO4 composites for high performance visible light induced photocatalytic degradation of dyes

Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore-575025, Karnataka, India

Topical Section: Materials Characterization

Photocatalysts with enhanced efficiency for environmental remediation requires an effective separation of photogenerated electron hole pairs and optimum charge carrier transport. Based on the above criteria, a cost effective, facile one-pot microwave approach was made to synthesize RGO-BaWO4 composites with excellent stability and reusability in photodegradation of methylene blue (MB) and methyl orange (MO). A series of composites with varying composition with respect to RGO was synthesized and thoroughly characterized using various techniques. The composite with 2.5% RGO-BaWO4 showed maximum efficiency under visible light irradiation. The mechanism of charge transfer and kinetics of the reaction was also studied. The interfacial/interparticle charge transfer between the narrow elliptical BaWO4 particles and RGO is found to be responsible for the increased efficiency. The photo generated holes and the superoxide radical were found to play a key role in the degradation process. The synergistic action makes RGO-BaWO4 composites a promising material as high performance photocatalyst for degradation of organic dyes.
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Keywords RGO-BaWO4 composites; microwave method; photodegradation; methylene blue; methyl orange

Citation: Mohamed Jaffer Sadiq Mohamed, Denthaje Krishna Bhat. A facile microwave approach to synthesize RGO-BaWO4 composites for high performance visible light induced photocatalytic degradation of dyes. AIMS Materials Science, 2017, 4(2): 487-502. doi: 10.3934/matersci.2017.2.487


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  • 2. M. Mohamed Jaffer Sadiq, U. Sandhya Shenoy, D. Krishna Bhat, NiWO 4 -ZnO-NRGO ternary nanocomposite as an efficient photocatalyst for degradation of methylene blue and reduction of 4-nitro phenol, Journal of Physics and Chemistry of Solids, 2017, 10.1016/j.jpcs.2017.05.023
  • 3. M. Mohamed Jaffer Sadiq, Sankararao Mutyala, Jayaraman Mathiyarasu, D. Krishna Bhat, RGO/ZnWO 4 /Fe 3 O 4 nanocomposite as an efficient electrocatalyst for oxygen reduction reaction, Journal of Electroanalytical Chemistry, 2017, 799, 102, 10.1016/j.jelechem.2017.05.051

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Copyright Info: © 2017, Denthaje Krishna Bhat, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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