A study of cobaltous chloride dispersion on the surface of the silica gel

Balkose D., Kokturk U., Yilmaz H.

APPLIED SURFACE SCIENCE, vol.147, no.1-4, pp.77-84, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 147 Issue: 1-4
  • Publication Date: 1999
  • Doi Number: 10.1016/s0169-4332(99)00088-4
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.77-84
  • Keywords: electron super probe, surface analysis, silica gel, cobaltous chloride, dispersion, COBALT(II), SPECTRA
  • Dokuz Eylül University Affiliated: Yes

Abstract

Cobalt (II) salts dispersed on different substrates have functions as humidity indicating desiccants and catalysts. CoCl2, containing silica gel granules of 3 mm size for packed column applications were prepared by impregnation of the aqueous solution of the salt to silica hydro gel at pH near 2, drying and ageing methods. X-ray diffraction and electron microprobe studies indicated cobalt element was both dispersed in particulate form and as sub-monolayer. IR spectra indicated presence of Si-OH groups in all of the silica gels. CoCl2, containing silica gels changed colour from blue to pink upon moisture adsorption due to presence of the CoCl2, Co2SiO4 and Na2CoSiO4. (C) 1999 Elsevier Science B.V. All rights reserved.