|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Symposium on Functional Nanomaterials: Discovery and Integration of Nanomaterials
||Mixed-phase Nanoscale TiO2 Photocatalysts: Aqueous Synthesis and Application to Water Detoxification
||Konstantina Chalastara, George P. Demopoulos
|On-Site Speaker (Planned)
Mixed phase titanium dioxide (TiO<SUB>2</SUB>) nanoparticles are of interest as photocatalysts in environmental applications, as thanks to intrinsic heterojunction may experience less photogenerated electron-hole pair recombination. In search of an optimum mixed phase composition TiO<SUB>2</SUB> nano-photocatalyst, we employ a novel hydrolysis process operating at steady state to synthesize powders with variable percentages of anatase, rutile and brookite. The process involves hydrolysis of TiCl<SUB>4</SUB> solution at different conditions, namely concentration, pH, and residence time. The mixed phase TiO<SUB>2</SUB> nanoparticles are characterized and evaluated as photocatalysts. Their performance is contrasted to that of pure phases and physical mixtures of the same to demonstrate the photocatalytic advantage of mixed phase nanoparticles. The comparison is extended to the commercial benchmark mixed-phase titania photocatalyst, Evonik P25. Photocatalytic activity is assessed both in terms of photo-assisted degradation of organic pollutants (represented by the model methyl orange compound) and inorganic pollutants (like selenate/selenite species).
||Planned: Supplemental Proceedings volume