Investigation of Titanium-Dioxide Coatings on Membrane Filtration Properties

Abstract

ABSTRACT. In this study, synthesized TiO2 nanorods and commercial Aeroxide P25 TiO2 nanoparticles were deposited on polyethersulfone (PES) membrane surfaces to compare their photocatalytic activity and effects on membrane surface and filtration properties. The catalysts were deposited on the membrane surface by physical deposition. The effect of the TiO2 amount on the stability of the catalyst layer and its effect on membrane resistance in presence and absence of UV irradiation were investigated. 1.2 mg/cm 2 catalyst coverage proved to be a minimal appropriate coverage to prevent membrane damage during UV irradiation. The catalysts formed hydrophilic layers on the surface, and in case of both catalyst the surface free energy increased compared to the neat membrane. The photocatalytic activity and retention of the modified membranes were tested spectrophotometrically by using Acid Red1, azo dye.

In Vitro Behaviour of New Experimental Adhesive Systems

“…Additions of TiO 2 nanoparticles increase the stability of adhesive, and the resistance to water sorption and solubility. Other studies revealed that TiO 2 present unique photocatalytic, antibacterial and UVabsorbing properties that recommend as beneficial additives in adhesives and resin composites [8,27].…”

Overview of Photocatalytic Membrane Reactors in Organic Synthesis, Energy Storage and Environmental Applications

“…Physical deposition (5) was used by Kovács et al [69] ( Figure 1c). In this method, the TiO 2 suspension was simply filtered through the membrane in a dead-end stirring cell.…”

“…SEM images of PMs prepared by (a) dip-coating[65]; (b) electrospinning-hydrothermal synthesis[68]; (c) physical deposition[69]; (d) chemical vapor deposition[58].…”