Photocatalytic Degradation of Methylene Blue by TiO₂- Graphene Composite

Abstract:

Inappropriate treatments of discharge wastewater from textile industries effluents with high concentrated dye are dangerous to the human and aquatic life due to the carcinogenic effect and chemical toxicity. Therefore, the usage of TiO₂ photocatalysis in water treatment has shown a significant impact on the degradation of dye into less carcinogenic and toxicity of the water. Interestingly, the addition of graphene oxide into TiO₂ system showed better photocatalytic efficiency of dye degradation as compared toTiO₂ photocatalyst alone due to a sufficient amount of radicals supply by the graphene oxide. The oxide radicals reacted with the dye radicals and eliminate the possibility of any chances of recombination of photons and electrons during the photodegradation process. These immobilized graphene/TiO₂ films were coated onto the glass substrate under the influence of polymeric polyvinyl aceatate/ polyvinyl chloride (PVA/PVC) mixture act as a binder. The adhesion strength of the immobilized system was fixed at ratio 1:0.025 of PVA/PVC binders. As a result, the immobilized system showed a high degradation rate of methylene blue dye due to the improvement of charge separation and also good adhesion property and sustainability of the film during continuous wastewater treatment.

• Periodical: Solid State Phenomena (Volume 317)
• Pages: 257-262
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.317.257
• Online since: May 2021
• Authors: Mohd Fairul Sharin Abdul Razak*, Ong Soon Hin, Raihan Hamzah
• Keywords: TiO₂, Graphene, Immobilized, Photocatalytic Degradation

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