Effect of the Amount of H 2 O on the Crystallization of TiO 2  Films Prepared from Alkoxide Solutions Containing Acetylacetone | Zendy

Uchiyama Hiroaki | Zendy; Okada Momoto | Zendy; Kozuka Hiromitsu | Zendy

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Effect of the Amount of H 2 O on the Crystallization of TiO 2 Films Prepared from Alkoxide Solutions Containing Acetylacetone

Author(s) -

Uchiyama Hiroaki,

Okada Momoto,

Kozuka Hiromitsu

Publication year - 2014

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.12860

Subject(s) - crystallite , crystallization , anatase , grain size , acetylacetone , alkoxide , rutile , dip coating , materials science , sol gel , phase (matter) , refractive index , mineralogy , analytical chemistry (journal) , chemical engineering , crystallography , coating , chemistry , inorganic chemistry , nanotechnology , photocatalysis , organic chemistry , metallurgy , catalysis , optoelectronics , engineering

Sol–gel‐derived TiO 2 films were prepared by dip‐coating from Ti ( OC 3 H 7 i ) 4 – CH 3 COCH 2 COCH 3 – HNO 3 – H 2 O – C 2 H 5 OH solutions, and the effect of the H 2 O content in solutions on the crystallization of TiO 2 films during the heat treatment at 800°C was discussed. The crystalline phase, crystallite size, grain size, and refractive index of the TiO 2 films depended on the H 2 O / Ti ( OC 3 H 7 i ) 4 mole ratios ( x ) in the coating solutions. Highly dense and crystalline rutile films were obtained at x = 0.5–10, where the crystallites and grains became larger with increasing x . The further increase in x from 10 to 50 reduced the crystallite size and refractive index of the films, where anatase phase appeared at x = 30–50.

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