Photocatalytic deactivation of airborne microbial cells on TiO2-loaded plate

Electrospun Titanium Dioxide Fibres for POME Treatment

“…In this experiment, 4ml of the Ti(OiPr) 4 solution was mixed with 4ml of the PVP solution to obtain the said stock solution. The solution was then placed inside a 10ml capacity syringe, the excess air bubbles were removed, and the syringe was placed in the syringe pump horizontally as shown in Figure 1.…”

“…The formation of a stable jet was the first attempt with blank PVP solution via an adjustable knob on a variable scale with reading from a multimeter. Therefore the flow rate and voltage were varied to establish a range of electrospinning conditions for Ti(OiPr) 4 and PVP mixed solution. The power supply delivers at 18kV in this experiment, at flow rate of 0.5mlh-1 at a distance of 8cm from the needle tip to the collector.…”

“…Nanotitania is widely accepted as one of the photocatalyst materials on the market today [1][2][3][4]. Photocatalyst is a material that enters a high-energy state by absorbing photoenergy, then emitting energy to a reactive substance, promoting a chemical reaction.…”

Effect of the radiation flux on the photocatalytic inactivation of spores of Bacillus subtilis

“…Goswami et al [24] reported the total inactivation of Serratia marcescens in a photocatalytic reactor with recirculation. The photocatalytic inactivation of bioaerosols was also the subject of a handful of more recent publications [25][26][27][28][29][30][31][32][33][34][35][36][37][38]. The use of photocatalytic process to degrade spores immobilized on a TiO 2 -coated surface was first reported by Wolfrum et al [27].…”

“…However, there are only few papers in which kinetic models describing photocatalytic inactivation of immobilized microorganisms are linked to the relevant operating variables, such as microorganism concentration, radiation flux on the catalytic surface, and exposition time or residence time. In this regard, Sato et al [29] developed a model of the photocatalytic inactivation kinetics of E. coli immobilized on quartz plates covered with TiO 2 . Moreover, Pal et al [31] studied the inactivation kinetics of E. coli, B. subtilis and Microbacterium sp.…”