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Controllable Crystalline Nano‐TiO 2 by Homogeneous Hydrolysis with Toluene‐ p ‐Sulfonic Acid
Author(s) -
Liu Wei,
Chen AiPing,
Lin JiaPing,
Dai ZhiMing,
Qiu Wei,
Liu Wei,
Zhu MengQin,
Usuda Shouji
Publication year - 2005
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/j.1551-2916.2004.00036.x
Subject(s) - anatase , rutile , nanocrystalline material , materials science , crystal (programming language) , chemical engineering , hydrolysis , toluene , nano , sulfonic acid , nanotechnology , chemistry , catalysis , photocatalysis , organic chemistry , polymer chemistry , composite material , computer science , engineering , programming language
The homogeneous hydrolysis method was proposed to synthesize nano‐TiO 2 with mixed crystal of anatase and rutile. It is remarkable that the crystal‐form‐controllable nanosize TiO 2 was obtained by the addition of toluene‐ p ‐sulfonic acid (TSA). Two processes of the rutile phase formation were proposed. TiO 2 was pure anatase crystalline in the absence of TSA. The sample with 0.2 mole ratio of TSA was mixed crystal of anatase and rutile, and characterized that the size of nanocrystalline was 19.5 nm for rutile and 13.5 nm for anatase, the specific surface area was 72.7 m 2 /g, and the energy of band gap was 2.83 eV. And the mechanism of the development of rutile nano‐TiO 2 was presented in homogeneous hydrolysis system with TSA.