Synthesis of silica particles in the hydrolysis of tetraethyl orthosilicate with amine catalysts

Daisuke Nagao, Eiichi Mine, Yoshio Kobayashi, Mikio Konno

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Methylamine (MA) and dimethylamine (DMA) were examined as catalysts for the hydrolysis of tetraethyl orthosilicate (TEOS) to synthesize monodispersed silica particles. Experimental results were compared with those in ammonia-catalyzed hydrolysis of TEOS. The hydrolysis reactions were carried out at a water concentration of 11 kmol/m3 in ranges of catalyst concentration (0.01-1.5 kmol/m3) and TEOS concentration (0.02-0.2 kmol/m3). Spherical particles were formed at catalyst concentrations lower than 1.5 kmol/m3 for NH3 and lower than 0.2 kmol/m3 for MA and DMA. Comparison of the coefficient of variation (Cv) for monodisperse spherical particles indicated that silica particles obtained with the amine catalysts were more highly monodisperse than those obtained with NH3 catalyst.

Original languageEnglish
Pages (from-to)905-907
Number of pages3
JournalJOURNAL of CHEMICAL ENGINEERING of JAPAN
Volume37
Issue number7
DOIs
Publication statusPublished - 2004 Jul 1

Keywords

  • Amine catalyst
  • Hydrolysis
  • Monodisperse
  • Silica particles
  • Tetraethyl orthosilicate

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Synthesis of silica particles in the hydrolysis of tetraethyl orthosilicate with amine catalysts'. Together they form a unique fingerprint.

Cite this