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Characterization of the surface hydroxyl properties of sepiolite and Ti(OH)(4) and investigation of new properties generated over physical mixture of Ti(OH)(4)-sepiolite

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Jung, SM Grange, Paul [UCL]

The behavior of hydroxyl groups of sepiolite and Ti(OH)(4) has been investigated by in situ diffuse reflectance infrared Fourier transform spectrometer (DRIFTS) during heat treatment, in order to understand the generation of new properties due to the mutual interaction between Ti(OH)(4) and sepiolite. The higher intensity ratio of SiOH/(Mg)(3)OH in the mechanical mixture than that in pure sepiolite shows the dissociation of Si-O-Si bond in sepiolite crystalline structure. The new acid property generated in the physical mixing between sepiolite and Ti(OH)(4) can be explained by the formation of Ti-O-Si bonds due to the interaction of Si-OH and Si-O-Si in sepiolite with Ti(OH)(4). (C) 2003 Elsevier B.V. All rights reserved.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2004
Language Anglais
Journal information "Applied Surface Science" - Vol. 221, no. 1-4, p. 167-177 (2004)
Peer reviewed yes
Publisher Elsevier Science Bv (Amsterdam)
issn 0169-4332
e-issn 1873-5584
Affiliation UCL
Keywords sepiolite ; Ti(OH)(4) ; physical mixing ; DRIFTS ; acidity
Links
Bibliographic reference Jung, SM ; Grange, Paul. Characterization of the surface hydroxyl properties of sepiolite and Ti(OH)(4) and investigation of new properties generated over physical mixture of Ti(OH)(4)-sepiolite. In: Applied Surface Science, Vol. 221, no. 1-4, p. 167-177 (2004)
Permanent URL http://hdl.handle.net/2078.1/40451