Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation

Annie K.M. Fung; Brenda K.W. Chiu; Michael H.W. Lam

doi:10.1016/S0043-1354(02)00567-5

Author(s)

Annie K.M. Fung
Brenda K.W. Chiu
Michael H.W. Lam

Detail(s)

Original language	English
Pages (from-to)	1939-1947
Journal / Publication	Water Research
Volume	37
Issue number	8
Publication status	Published - Apr 2003

Link(s)

DOI	DOI https://doi.org/10.1016/S0043-1354(02)00567-5 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-0037374811&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(55cd8c70-f462-4801-9a44-7e4a89830a0a).html

Abstract

A new ruthenium(II) photosensitizer, [Ru^II(py-pzH)₃]²⁺ (where py-pzH=3-(2′-pyridyl)pyrazole), has been synthesized. The complex displayed outstanding excited state redox properties (estimated Ru^III/Ru^II*≈-1.24V vs. NHE) and was expected to sensitize the injection of electrons into the conduction band of anatase TiO₂ upon visible irradiation. The photosensitizer was anchored onto the surface of anatase TiO₂ particles via in situ silylation. The silyl-linkage displayed excellent stability in both aqueous media, over a wide pH range, and in common organic solvents. The resultant material, TiO₂ - [Ru^II(py-pz-Si≡)₃], was found to be able to mediate degradation of CCl₄ in neutral aqueous medium under broad band visible irradiation (λ>450nm). The relation between the rate of degradation and concentration of substrate was explored and the mechanism of the photodegradation of the perhalogenated organic was discussed. © 2002 Elsevier Science Ltd. All rights reserved.

Research Area(s)

Photocatalytic degradation, Photosensitization, Regenerative sensitization, TiO2

Citation Format(s)

[ RIS ] [ BibTeX ]

Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation. / Fung, Annie K.M.; Chiu, Brenda K.W.; Lam, Michael H.W.
In: Water Research, Vol. 37, No. 8, 04.2003, p. 1939-1947.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Fung, AKM, Chiu, BKW & Lam, MHW 2003, 'Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation', Water Research, vol. 37, no. 8, pp. 1939-1947. https://doi.org/10.1016/S0043-1354(02)00567-5

Fung, A. K. M., Chiu, B. K. W., & Lam, M. H. W. (2003). Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation. Water Research, 37(8), 1939-1947. https://doi.org/10.1016/S0043-1354(02)00567-5

Fung AKM, Chiu BKW, Lam MHW. Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation. Water Research. 2003 Apr;37(8):1939-1947. doi: 10.1016/S0043-1354(02)00567-5

Fung, Annie K.M. ; Chiu, Brenda K.W. ; Lam, Michael H.W. / Surface modification of TiO2 by a ruthenium(II) polypyridyl complex via silyl-linkage for the sensitized photocatalytic degradation of carbon tetrachloride by visible irradiation. In: Water Research. 2003 ; Vol. 37, No. 8. pp. 1939-1947.