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The current study focuses on graphene oxide (GO) and its composite with zinc oxide and titanium dioxide nanoparticles to develop a simple nano chemistry-based clean and efficient process for the effective degradation of methylene blue (MB) dye. Graphene oxide composite with zinc oxide and titanium dioxide nanoparticles were fabricated via a thermal coupling process that demonstrates exclusive physiochemical properties. A detailed comparison of the structure, morphology, and surface analysis of synthesized GO and nanocomposites, as well as their electrochemical properties, has been accomplished. By using the degradation of methylene blue (MB) dye the photocatalytic function of nanocomposites was studied. Results reveal that the rate constants of GO, GO-TiO 2 , and GO-ZnO photocatalysts are 1.06 × 10 −3  min −1 , 2.56 × 10 −3  min −1 , and 1.63 × 10 −3  min −1  respectively which discloses GO-TiO 2  nanocomposite shows maximum degradation of MB dye among both catalysts. The reuse of photocatalyst even after five cycles retained the degradation efficiency of 80, 77, and 49% respectively for GO-TiO 2 , GO-ZnO, and GO when tested against MB. Hence, as a result, it was determined that these photocatalysts are ideal for the remediation of dye-contaminated wastewater.

zeitschrift für physikalische chemie

A novel synthesis of graphene oxide-titanium dioxide (GO-TiO 2 ) and graphene oxide-zinc oxide (GO-ZnO) nanocomposites and their application as effective, reusable photocatalysts for degradation of methylene blue (MB) dye