Hybridisation of sebacic acid on the surface of γ-alumina nanoparticles in sub- And supercritical water

Varu Singh, Seiichi Takami, Kimitaka Minami, Daisuke Hojo, Toshihiko Arita, Tadafumi Adschiri

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The surface modification of γ-alumina nanoparticles by sebacic acid in super- and subcritical water was investigated. The modified alumina was characterised by Fourier-transform infrared spectra, X-ray diffraction patterns, transmission electron microscopy images, and thermogravimetric studies. The alumina nanoparticles were found to remain stable, and sebacic acid was bound to their surfaces at 200 °C, but their crystallite structure was partially changed to that of boehmite above 200 °C. Under supercritical conditions at 400 °C, the alumina nanoparticles were totally changed to boehmite nanoparticles. The surface adsorption of sebacic acid is attributed to reactions between the surface-OH groups of alumina and the-COOH groups of sebacic acid. The modified alumina nanoparticles have-COOH groups on their surface, enabling hybridisation with various biomolecules, and thus allowing their application in several areas.

Original languageEnglish
Pages (from-to)1045-1050
Number of pages6
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume65
Issue number8
DOIs
Publication statusPublished - 2010

Keywords

  • Nano alumina
  • Supercritical and subcritical water
  • Surface modification

ASJC Scopus subject areas

  • Chemistry(all)

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