tailieunhanh - Báo cáo hóa học: " Assessment of Microwave/UV/O3 in the Photo-Catalytic Degradation of Bromothymol Blue in Aqueous Nano TiO2 Particles Dispersion"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Assessment of Microwave/UV/O3 in the Photo-Catalytic Degradation of Bromothymol Blue in Aqueous Nano TiO2 Particles Dispersion | Nanoscale Res Lett 2010 5 1627-1632 DOI s11671-010-9686-y NANO EXPRESS Assessment of Microwave UV O3 in the Photo-Catalytic Degradation of Bromothymol Blue in Aqueous Nano TiO2 Particles Dispersions Sung Hoon Park Sun-Jae Kim Seong-Gyu Seo Sang-Chul Jung Received 15 June 2010 Accepted 1 July 2010 Published online 18 July 2010 The Author s 2010. This article is published with open access at Abstract In this study a microwave UV TiO2 ozone H2O2 hybrid process system in which various techniques that have been used for water treatment are combined is evaluated to develop an advanced technology to treat non-biodegradable water pollutants efficiently. In particular the objective of this study is to develop a novel advanced oxidation process that overcomes the limitations of existing single-process water treatment methods by adding microwave irradiation to maximize the formation of active intermediate products . OH radicals with the aid of UV irradiation by microwave discharge electrodeless lamp photo-catalysts and auxiliary oxidants. The results of photo-catalytic degradation of BTB showed that the decomposition rate increased with the TiO2 particle dosages and microwave intensity. When an auxiliary oxidant such as ozone or hydrogen peroxide was added to the microwave-assisted photo-catalysis however a synergy effect that enhanced the reaction rate considerably was observed. Keywords Photo-catalysts Microwave UV Ozone Dye S. H. Park . Jung Department of Environmental Engineering Sunchon National University Jeonnam 540-742 Korea e-mail jsc@ . Kim Department of Nano Science and Technology Sejong University Seoul 143-747 Korea . Seo Department of Civil Environmental Engineering Chonnam National University Jeonnam 550-749 Korea Introduction Azo dye is the most widely used one of those synthesized organic dyes whose market share is about 50 of the whole dye market. The high market share of azo dye is due to its relatively .