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R. I. Bickley, G. Munuera and F. S. Stone, “Photoadsorption and Photocatalysis at Rutile Surfaces: II. Photocatalytic Oxidation of Isopropanol,” Journal of Catalysis, Vol. 31, No. 3, 1973, pp. 398-407. doi:10.1016/0021-9517(73)90311-4

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• TITLE: Self Assembly of Honeycomb TiO2 Coatings by Tea-Leaf Extracts as the Dispersoids

  AUTHORS: Masayuki Kamei

  KEYWORDS: TiO2, Coatings, Photo-Catalysis

  JOURNAL NAME: World Journal of Condensed Matter Physics, Vol.1 No.3, August 22, 2011

  ABSTRACT: Photo catalytic TiO2 coatings with well defined honeycomb structure were successfully self-assembled on glass substrates by a simple “dip and burn solgel method“. The crux of this new method is that the starting material for the sol-gel coating (the water solution of ammonium titanium citrate) was “doped” with “tea-leaf extracts”. Tea-leaf extracts were completely dissolved in the water solution of ammonium titanium citrate and nucleate uniformly during the drying procedure of the coating precursor formation. This uniformly dispersed nucleation of the “tea-leaf extracts (tannin, catechin…)” were extracted during calcinations and leaving honeycomb-cell like nano-structure in the TiO2 coatings. Self-assembled cells were uniformly distributed in the TiO2 coatings and the diameter of the cells was in the range of 200 - 1000 nm. Fine honeycomb structures were clearly observed with microscopic observations.