Synthesis of uniform anatase TiO2 nanoparticles by gel-sol method: 1. Solution chemistry of Ti(OH)n(4-n)+ complexes

Tadao Sugimoto, Xingping Zhou, Atsushi Muramatsu

研究成果: Article査読

192 被引用数 (Scopus)


The mole fractions of hydroxo complexes of titanium(IV) ion in an aqueous solution with 0.10 mol dm-3 NaClO4 at 25°C have been determined as a function of pH by a newly developed analytical procedure based on UV spectrophotometry, using a metastable homogeneous solution of 1.25 × 10-4 mol dm-3 in total concentration of Ti(IV). Also, the total concentration of the hydroxo complexes in equilibrium with Ti(OH)4 solid, or the solubility of Ti(OH)4 solid in an inhomogeneous system, has been obtained by ICP measurement for the solution phase. A combination of these data yielded the absolute concentration of each complex species in equilibrium with Ti(OH)4 solid. Finally, Ti(OH)3+ complex has been assigned to the precursor for the formation of anatase TiO2 nanoparticles transformed from Ti(OH)4 gel from a comparison between the above equilibrium data and a kinetic study on the formation rate of the anatase TiO2 particles in the gel-sol system.

ジャーナルJournal of Colloid And Interface Science
出版ステータスPublished - 2002 1 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学


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