Preparation and Application of TiO2 Photocatalytic Coatings

Abstract

In this study the titanium dioxide (TiO2) nanoparticles were applied in wastewater and volatile organic compounds (VOCs) flue gas treatment equipment TiO2 based nanoparticle for photocatalytic oxidation application were successfully synthesized using the titanium isopropoxide as precursor These nanoparticles were coated to metal substrate through dip coating The coating uniformity adhesion on metallic substrate and other characteristics were analyzed and improved Methylene blue (MB) removal and acetaldehyde removal were measured to evaluate photocatalytic activity performance of the TiO2 coating The freshly coated substrate was used for MB removal with 60% dye removal However MB removal rate were reduced to 45% after several measurement repetitions which indicates the catalyst poisoning For the long term application the catalyst needs to be cleaned and regenerated in order to achieve stable VOCs removal performance Thus some catalyst regeneration techniques were developed and studied thoroughly The freshly coated substrate removed up to 99% of acetaldehyde Through a proper regeneration step the removal efficiency was maintained at 97 56% after several repetitions This result showed that catalyst regeneration method helps reduce the effects of catalyst surface deterioration which can be a major challenge for long term application

Date of Award	2018 Aug 2
Original language	English
Supervisor	Franklin Chau-Nan Hong (Supervisor)