ABSTRACT
Titanium dioxide (TiO2) has proven to be a promising n-type semiconductor material because of its wide band gap (3.2 eV) under UV light (Zaleska, 2008). In addition to this, it has a high physical and chemical stability and also a high refractive index. This makes the material widely used by material scientists (Abbas et al., 2011; Xie et al., 2012). Several semiconductor oxides such as ZnO, TiO2, NiO, CuO, Al2O3, Fe2O3, SnO2, ZrO2, and WO3 have received considerable attention over the last few years due to their distinctive optical and electronic properties, but TiO2can also be used in several other domains such as photocatalysts, solar cells, sensors and bactericidal action (Chaturvedi et al., 2012; Gómez et al., 2003; Grieshaber et al., 2008). Recently, there is a considerable interest in using TiO2 nanoparticles as a modifier since they have a high surface area, good biocompatibility and relatively good conductivity (Chaturvedi et al., 2012; Liu et al., 2012).
