Direct measurement of nucleation and growth modes in titania nanoparticles generation by a CVD method

Chan Soo Kim, Kikuo Okuyama, Koichi Nakaso, Manabu Shimada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

To understand the mechanism by which titania (TiO2) nanoparticles are generated by a CVD method, the primary nucleation mode size distributions of TiO2 nanoparticles prepared from two different chemical precursors (TTIP and TiCl4) were directly measured using a DMA/PSM/CNC system. This represents the first report of such direct measurement in the nucleation mode. These results are particularly important for experimental investigation of particle nucleation and growth, something which has never been achieved before. In the nucleation mode, titania nanoparticles with a diameter of about 2 nm were produced by nucleation. At low reactor temperatures, nucleation and surface reaction were major contributors to particle generation. At a high reaction temperature, coagulation and sintering became more important. The morphology and crystallinity of the particles were investigated by TEM and XRD as a function of temperature and precursor concentration. The properties of the titania nanoparticles, such as particle size distribution, the morphology and crystallinity, changed as a function of reaction temperature and chemical reaction rate.

Original languageEnglish
Pages (from-to)1379-1389
Number of pages11
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume37
Issue number11
DOIs
Publication statusPublished - Nov 1 2004
Externally publishedYes

Keywords

  • CVD method
  • Growth mode
  • Measurement
  • Nucleation mode
  • TiO nanoparticle

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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