Vahid Jabbari - Photodeposition-assisted synthesis of novel nanoparticulate In, S-codoped TiO 2 powders with high visible light-driven photocatalytic activity

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      Publication Details (including relevant citation   information):

      Applied Surface Science 285, 121-129


      In order to search for an efficient photocatalysts working under   visible light illumination, we have investigated the effect of   metal and nonmetal ions (In, S) codoping on the photocatalytic   activity of TiO2 nanoparticles (TiO2 NPs)   prepared by combining of sol–gel (SG) and photodeposition (PD)   methods using titanium tetra isopropoxide (TTIP), indium nitrate   (In(NO3)3) and thiourea as precursors. In   this regard, at first three different percentage of S (0.05, 0.2   and 0.5) doped into the TiO2 by SG method, and then   different amount of In(III) loaded on the surface of the prepared   samples by PD technique. The results showed that the In,   S-codoped TiO2 (In, S-TiO2) with a   spheroidal shape demonstrates a smaller grain size than the pure   TiO2. Meanwhile, the UV–vis DRS of In,   S-TiO2 showed a considerable red shift to the visible   region. Finally, the photocatalytic activity of In,   S-TiO2 photocatalysts were evaluated by photooxidative   degradation of methyl orange (MO) solution under UV and visible   light illumination. As a result, it was found that   0.05%S-0.5%In/TiO2, 0.2%S-1.5%In/TiO2 and   0.5%S-0.5%In/TiO2 had the highest catalytic activity   under visible light in each group and among these samples   0.2%S-1.5%In/TiO2 showed the best photocatalytic   performance under visible light and decomposes more than 95% MO   in only 90 min.

      Address (URL): doi:10.1016/j.apsusc.2013.07.165