Abstract:
This study was conducted to find an effective way to immobilize
titania nanoparticles (un-doped & silver-doped) on a suitable solid
substrate so that this coated substrate would be used for photocatalytic
elimination of toxic environmental pollutants in water. In this study
immobilization of titania on glass beads was carried out by conventional
Sol Gel (SG) method and the Modified Sol Gel (MSG) method
(Balasubramanian et al., 2003) using three different types of titania
precursors; (a) Titania General Purpose Reagent (GPR); (b) Titania Undoped
nanaoparticles (UNP) and (c) Titania Ag-doped nanoparticles
(AgNP). Pure and silver doped (1% molar ratio) titania nanoparticles
were synthesized from titania General Purpose Reagent (GPR) by
calcination and liquid impregnation methods (Asghar et al., 2011). XRD,
SEM, EDS, analysis were performed to characterize the synthesized
particles and the coating on the beads. The results of this study show that
MSG method offers superior coatings as compared to SG method, in term
of titania quantity and nanoparticles added MSG method offers better
coatings results, in term of coating coverage and photocatalytic
performance for elimination of 4-Nitrophenol and Arsenic from water.
