Hydrothermal synthesis of brookite-type titania crystals using water-soluble titanium complexes

Makoto Kobayashi, Hideki Kato, Masato Kakihana

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Brookite is a polymorph of titania found in nature. Synthesis of single-phase brookite is difficult in comparison to anatase and rutile. It is well known that brookite has various potential applications. Therefore, methods for the synthesis of brookite with high purity are highly desirable. This chapter summarizes simple hydrothermal methods for the synthesis of brookite crystals with various morphologies using water-soluble titaniumcomplexes. Physical properties of the brookite powders obtained are also described. In addition, the formation mechanisms are discussed. A series of studies have indicated that the structures and nature of the complexes have a strong influence on the formation of brookite nuclei. Therefore, the titanium source is quite important for the selective synthesis of titania polymorphs. Application of the present approach allows the synthesis of rod-like brookite crystals with aspect ratios of 1 - 10, as well as snowflake-like crystal agglomerations. The mechanism of morphological control is also discussed.

Original languageEnglish
Title of host publicationTitanium Dioxide Nanoparticles
Subtitle of host publicationCharacterizations, Properties and Syntheses
PublisherNova Science Publishers, Inc.
Number of pages22
ISBN (Electronic)9781536110838
ISBN (Print)9781536110739
Publication statusPublished - 2017 Jan 1


  • Brookite
  • Hydrothermal method
  • Morphological control
  • Water-soluble titanium complex


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