IR spectroscopy of surface water and hydroxyl species on nanocrystalline TiO2 films

K S Finnie; D J Cassidy; John R Bartlett; J L Woolfrey

doi:10.1021/la0009240

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IR spectroscopy of surface water and hydroxyl species on nanocrystalline TiO2 films

Journal article

Peer reviewed

IR spectroscopy of surface water and hydroxyl species on nanocrystalline TiO2 films

K S Finnie, D J Cassidy, John R Bartlett and J L Woolfrey

Langmuir, Vol.17(3), pp.816-820

2001

DOI: https://doi.org/10.1021/la0009240

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Abstract

The speciation of water and hydroxyl groups bound to the surface of a nanocrystalline titania film has been investigated by in-situ infrared spectroscopy as a function of temperature. Calibration of the absorbance of the δ(H2O) mode at 1625 cm-1 by thermogravimetry has enabled an estimation of the concentration of surface H2O present during thermal dehydration of the films, which varied from 5 to 0.65 molecules per nm2 over the temperature range 27-150 °C. Two types of coordinated H2O and both terminally bound and bridging hydroxyls have been identified by the temperature-dependent behavior of their corresponding O-H stretching modes. Hydrogen bonding was observed between coordinated H2O and terminally bound hydroxyls (v(OH) = 3730 cm-1), whereas bridging hydroxyls (v(OH) = 3670 cm-1) do not appear to be affected by similar H-bonding.

Details

Title: IR spectroscopy of surface water and hydroxyl species on nanocrystalline TiO2 films
Authors: K S Finnie (Author) - Australian Nuclear Science and Technology Organisation Materials Division
D J Cassidy (Author) - Australian Nuclear Science and Technology Organisation Materials Division
John R Bartlett (Author) - Australian Nuclear Science and Technology Organisation Materials Division
J L Woolfrey (Author) - Australian Nuclear Science and Technology Organisation Materials Division
Publication details: Langmuir, Vol.17(3), pp.816-820
Publisher: American Chemical Society
Date published: 2001
DOI: 10.1021/la0009240
ISSN: 0743-7463; 0743-7463
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449032002621
Output Type: Journal article

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Web Of Science research areas: Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary