Photocatalytic disinfection of water with Ag–TiO2 nanocrystalline composite

Abstract

A method of solution impregnation and calcination has been demonstrated for synthesizing nanoparticles of Ag-TiO 2 composite photocatalysts for use in the disinfection of water. Only a small proportion of the TiO 2 surface is covered by nano-islands of Ag corresponding to a loading of 4 wt.% of Ag; thus, most of the TiO 2 surface is available for photocatalytic function. Although the primary particles of both Ag and TiO 2 are in the 10-to 20-nm range, microscopic studies indicate that the primary particles of Ag are deposited on nano-agglomerates of 30-to 70-nmsized TiO 2 . It is seen that the relatively small loading of Ag has not caused any UV-vis spectral shift but has enhanced the rate of photocatalytic antibacterial action of TiO 2 , presumably by electron trapping.

Effect of Nanocomposite Packaging Containing Ag and Zno on Reducing Pasteurization Temperature of Orange Juice

“…However, Ag/TiO 2 shows great promise as a photocatalytic material because of its photoreactivity and visible light response (Li et al . 2008) and are found to be significantly more photocatalytically and antimicrobially active than a titania coating (Kumar and Raza 2009). Zhang and Chen (2009) showed that by doping TiO 2 with metallic form of nanosilver, the bactericidal activity increased because of its unique structural feature of nanosilver dispersed on the TiO 2 surface and indicated that TiO 2 serve as a solid antiaggregation support to maintain the dispersion of nanosilver, which could also contribute to the antibacterial performance.…”

Producing colored cotton fabrics with functional properties by combining silver nanoparticles with nano titanium dioxide

“…The images at higher magnification (Fig. 2f, i, l) indicate that the particles are roughly agglomerated, which could be attributed to the high surface energy of nanoparticles (Kumar and Raza 2009;Vamathevan et al 2002;Zhang et al 2003;Cao et al 2017).…”

Recombinant Escherichia coli BL21-pET28a-egfp Cultivated with Nanomaterials in a Modified Microchannel for Biofilm Formation

“…This is because the internal convection of the aqueous segments enhanced the mass transfer arising from the segmented flow, which was beneficial to increase the growth rate of the biofilms. In addition, the oxygen input in the air segments was beneficial to increase the growth rate of biofilms [ 21 ]. Thus, fluid flow regimes have a significant impact on the structures and development of biofilms.…”