Vahid Jabbari - Structural, morphological and photocatalytic characterisations of Ag-coated anatase TiO2 fabricated by the sol–gel dip-coating method

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      Publication Details (including relevant citation   information):

      Journal of Experimental Nanoscience 8 (7-8), 901-912

      Abstract:

      This study reports on the synthesis, characterisation and   environmental applications of immobilised Titanium dioxide   (TiO2) as photocatalyst. Nanostructured thin films   have been prepared on glass substrates using a layer-by-layer   dip-coating method. The crystalline phase and surface morphology   of the thin films were investigated by X-ray diffraction (XRD)   pattern and scanning electron microscopy (SEM), respectively. The   XRD results show that the TiO2 thin films crystallise   in anatase phase and we have found that the thin films consist of   titanium dioxide nanocrystals. SEM shows that the nanoparticles   are sintered together to form a compact structure and   TiO2 particles coated with silver nanoclusters were   observed. Ag-coated TiO2 films demonstrated   photocatalysis performance when irradiated, and the Ag carrier   further showed an electron-scavenging ability to mitigate   electron–hole pair recombination, which can improve the   photocatalytic efficiency. With the oxidisation and   electron-scavenging ability of Ag and the photocatalysis ability   of TiO2, Ag-coated TiO2 can decolour methyl   orange (MO) more than bare TiO2. It is a new approach   to form Ag-coated TiO2 nanoparticles with a simple   system and non-toxic materials. The high photocatalytic effect of   Ag-coated TiO2 nanoparticles on pollutant (MO)   suggests that it may have a promising future for water and   wastewater treatments.

      Address (URL): DOI:   10.1080/17458080.2011.620018