TiO2 photocatalyst film using circulating fluidised bed–chemical vapour deposition. (February 2015)

• Record Type: Journal Article
• Authors: Lee, H.; Park, Y. K.; Kim, S. J.; Park, J. H.; Ki, S. J.; Jung, S. C.
• Is Part Of: Surface engineering. Volume 31:Number 2(2015)
• Page Start: 134
• Page End: 139
• Publication Date: 2015-02
• Subjects: Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1179/1743294414Y.0000000350
• Languages: English
• ISSNs: 0267-0844

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>TiO₂ photocatalyst beads were synthesised using the circulating fluidised bed–chemical vapour deposition (CFB-CVD) method. Their photocatalytic activity was compared with the TiO₂ photocatalyst balls synthesised using the conventional CVD (C-CVD) method. The TiO₂ film synthesized by CFB-CVD showed (110) oriented anatase crystal structure. Compared to the film synthesised by C-CVD, the CFB-CVD synthesised film had much less dense crystal structure owing to TiO₂ powders precipitated during the film growth. When the CFB-CVD synthesised TiO₂ beads were used in the photocatalytic decomposition of RhB in a fluidised bed reactor, the decomposition rate increased with increasing UV intensity and circulating flowrate and with decreasing initial RhB concentration. One important shortcoming of the TiO₂ photocatalyst beads synthesised by CFB-CVD turned out to be that the photocatalytic activity was decreased significantly by repeated reuse, calling for further investigation to improve the durability.</p> </abstract>