Development of visible light sensitive titania photocatalysts by combined nitrogen and silver doping

Fabrication of Ag/TiO2 photocatalyst for the treatment of simulated hospital wastewater under sunlight

“…This is in agreement with Binitha et al[16] and El Saliby et al[7] who have explained the absence of distinct peaks of Ag as an indication of efficient dispersion of such nanoparticles present in low concentrations. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.…”

Effect of Pt or Pd doping on stability of TiO2 nanoparticle suspension in water

“…These results provide an important understanding that the pH at IEP and zeta potential of the synthesized TiO 2 could be simply altered by types of dopant and its doping content. The enhancement in surface acidity would attribute to the improvement of the photocatalytic activity of TiO 2 nanoparticles has also been reported in some previous works [20,21].…”

“…The cationic dopant would still bond to oxygen atoms, resulting in a charge imbalance. The charge imbalance on positive or negative aspect could be considered as Lewis site or Brö nsted sites, respectively [20]. It should be noted that Pt and Pd could be 4-coordinated with oxygen atoms.…”

“…Since Ti is octahedral coordinated, two oxygen atoms could be bonded to the Ti core which would still be available of anchoring of four oxygen atoms. When either a Pt or a Pd atom is attached to Ti lattice, four valence electrons of Pt or Pd would be distributed to four bonds, while the two negative charges of oxygen atom would be distributed to three bonds [20]. The charge difference for each individual bond would be equal to +1 À 2/3, namely +1/3.…”

Water Reclamation by Heterogeneous Photocatalysis over Titanium Dioxide

“…The growing importance of wastewater reuse and the resulting need to remove recalcitrant pollutants from effluents have impacted the science and engineering of water treatment, to generate significant research interest in this area (Ollis et al 1989;Herrmann et al 1993;Gaya and Abdullah 2008;Shon et al 2008;Lee et al 2009;Chong et al 2010;Okour et al 2010;El Saliby et al 2011). The widely used conventional biological wastewater treatment technologies have limited ability to remove certain pollutants, such as pharmaceuticals, personal care products, and pesticides from water.…”