Author(s)

Sunitha Medidi^1,2, Sowmyasree Markapurapu³, Mastan Rao Kotupalli⁴, Rama Krishna Reddy Chinnam¹, Venkata Mahalakshmi Susarla¹, Hima Bindu Gandham¹, Paul Douglas Sanasi^1*

¹Department of Engineering Chemistry, AU College of Engineering, Andhra University, Visakhapatnam, India.
²SKR College for Women, Rajamahendravaram, India.
³SKR College for Women, Rajamahendravaram, India.
⁴Department of Chemistry, University of Dodoma, Dodoma, Tanzania.

Copper Tungstate-Graphene Oxide nano composites have been successfully applied as excellent catalysts for the photocatalytic degradation with Methylene blue and Malachite green dyes under visible light irradiation. A facile solid state metathesis synthesis of copper tungstate (CuWO₄) followed by ball milling and subsequent preparation of copper tungstate-graphene oxide (CuWO₄-GO) nano composite using a colloidal blending process and its application as a visible light photocatalyst for the degradation of Malachite green and Methylene blue dyes. The morphology and composition of copper tungstate (CuWO₄) nano composite have been characterized using X-Ray Diffraction (XRD), UV-Visible Diffuse Reflectance Spectra (UV-DRS), Raman Spectra, Field Emission Scanning Electron Microscopy (FESEM)-EDS and UV Visible Spectroscopy. It shows a band gap value of 2.13 eV, an increase in range and intensity of light absorption and the reduction of electron-hole pair recombination in CuWO₄ with the introducing of GO on to it.

Copper Tungstate, Graphene Oxide, Metathesis, Methylene Blue, Malachite Green, Visible Light Photodegradation

Medidi, S. , Markapurapu, S. , Kotupalli, M. , Chinnam, R. , Susarla, V. , Gandham, H. and Sanasi, P. (2018) Visible Light Photocatalytic Degradation of Methylene Blue and Malachite Green Dyes with CuWO₄-GO Nano Composite. Modern Research in Catalysis, 7, 17-34. doi: 10.4236/mrc.2018.72002.