Different samples of Sn and W-codoped TiO2
Nowadays, photocatalysis has attracted lively interest due to its potential applications in environmental remediation and clean energy production. Among various photocatalysts, TiO2
Visible light sensitive TiO2
Doping TiO2
In our previous research we studied the effect of doping Sn (up to 30 mol%) and Nb (up to 20 mol%) on photo-catalytic behavior of titania based thin films. We found that 15 mol% of Sn and 1 mol% on Nb shows the most significant improvement on photo-catalytic behavior of TiO2
However, very few studies of Sn,W co-doped TiO2
Tungsten doping is proven to be an efficient technique for solving the major problems associated with the use of titania as a photocatalyst. Having an ionic radius similar to that of titanium, tungsten is expected to be incorporated into the titania crystal lattice in a substitutional manner (Ratova et al. 2013). Several authors have reported significant improvements in the photoactivity of titania through doping it with tungsten (Farahani et al. 2011; Kubacka et al. 2009; Saepurahman et al. 2010; Rampaul et al. 2003). Li et al. described titania with 3 at.% of W as high activity photocatalyst for coatings deposited by the sol-gel method (Li et al. 2011), while Kubacka et al. found the optimum concentration to be significantly higher-19 at.%, with the coatings prepared by a microemulsion method (Kubacka et al. 2009).
