Browsing by Author "ZUNAIRA ARSHAD"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Dye degradation by nanophotocatalysis
    (UMT, Lhr, 2018) ZUNAIRA ARSHAD
    TiO2/Graphene oxide nanocomposites have been prepared by TiO2 nanoparticles deposition on graphene oxide sheets via liquid phase deposition. This chemical method of Liquid phase deposition has been used for composite preparation due to hydrophobic/hydrophilic incompatibility of graphene oxide with metal oxides.TiO2/GO nanocomposites have larger surface area than that of prepared TiO2 nanoparticles and showed enhanced rate of photocatalytic activity. Crystallinity, dislocation density, specific surface area and anatase phase of TiO2 are estimated by XRD. Average crytallite size of TiO2 calculated from XRD is 12.42 nm and that of GO is 4.01 nm. Characteristic peaks in XRD at 2Ѳ =25.3° and 47.9° are for anatase phase of TiO2. Successful synthesis of GO, TiO2 and TiO2/GO nanocomposites is confirmed by FTIR. Morphology and size of composites and TiO2 nanoparticles are estimated by SEM. The synthesized nanoparticles have uniform distribution on graphene oxide sheets. TiO2 nanoparticles with diameter range of 10-100nm, are found deposited on graphene oxide sheets. 8% nanocomposites showed fastest and highest rate of dye degradation among all composites and pure TiO2 nanoparticles.Excellent photocatalytic activity is attributed to thin two dimensional sheet support, larger surface area, higher adsorption capacity and good electron acceptability of graphene oxide.