Photocatalytic decolorization of anthraquinonic dye by TiO2 thin film under UVA and visible-light irradiation

C. H. Ao; M. K H Leung; Ringo C.W. Lam; Dennis Y.C. Leung; Lilian L.P. Vrijmoed; W. C. Yam; S. P. Ng

doi:10.1016/j.cej.2006.10.022

Author(s)

C. H. Ao
Ringo C.W. Lam
Dennis Y.C. Leung
Lilian L.P. Vrijmoed
W. C. Yam
S. P. Ng

Detail(s)

Original language	English
Pages (from-to)	153-159
Journal / Publication	Chemical Engineering Journal
Volume	129
Issue number	1-3
Publication status	Published - 1 May 2007

Link(s)

DOI	DOI https://doi.org/10.1016/j.cej.2006.10.022 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-34047269112&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(d08fd0cf-9f7e-415e-8840-62907e12cd05).html

Abstract

In this investigation, the effectiveness of using photocatalytic sol-gel TiO₂ thin film to decolorize anthraquinonic dye Acid Blue 80 was evaluated experimentally. The TiO₂ photocatalysts synthesized were characterized by DSC-TG, XRD, HRTEM, UV-vis spectra, SEM, and XPS. The experimental results showed that a TiO₂ thin film formed without high temperature calcination could effectively perform photocatalytic decolorization under UVA irradiation. After the TiO₂ thin film was modified by Cr ion implantation, the characterization by UV-vis spectra showed that the light absorption was extended beyond UV to the visible range. The modified thin film could perform visible-light-assisted photocatalytic decolorization of the dye. The overall study demonstrates the promise of solar photocatalytic decolorization of dye for treatment of textile effluent. By adopting immobilized TiO₂ thin films instead of conventional suspended TiO₂ particles, the photocatalytic water treatment method becomes more cost-effective as the costly filtration process, normally needed to recover TiO₂ particles from the effluent discharge, can be omitted. © 2006 Elsevier B.V. All rights reserved.

Research Area(s)

Anthraquinonic dye, Chromium ion implantation, Photocatalytic decolorization, Sol-gel thin film, Titanium dioxide

SDG 6 - Clean Water and Sanitation

Citation Format(s)

[ RIS ] [ BibTeX ]

Photocatalytic decolorization of anthraquinonic dye by TiO₂ thin film under UVA and visible-light irradiation. / Ao, C. H.; Leung, M. K H; Lam, Ringo C.W. et al.
In: Chemical Engineering Journal, Vol. 129, No. 1-3, 01.05.2007, p. 153-159.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Ao, CH, Leung, MKH, Lam, RCW, Leung, DYC, Vrijmoed, LLP, Yam, WC & Ng, SP 2007, 'Photocatalytic decolorization of anthraquinonic dye by TiO₂ thin film under UVA and visible-light irradiation', Chemical Engineering Journal, vol. 129, no. 1-3, pp. 153-159. https://doi.org/10.1016/j.cej.2006.10.022

Ao, C. H., Leung, M. K. H., Lam, R. C. W., Leung, D. Y. C., Vrijmoed, L. L. P., Yam, W. C., & Ng, S. P. (2007). Photocatalytic decolorization of anthraquinonic dye by TiO₂ thin film under UVA and visible-light irradiation. Chemical Engineering Journal, 129(1-3), 153-159. https://doi.org/10.1016/j.cej.2006.10.022

Ao CH, Leung MKH, Lam RCW, Leung DYC, Vrijmoed LLP, Yam WC et al. Photocatalytic decolorization of anthraquinonic dye by TiO₂ thin film under UVA and visible-light irradiation. Chemical Engineering Journal. 2007 May 1;129(1-3):153-159. doi: 10.1016/j.cej.2006.10.022

Ao, C. H. ; Leung, M. K H ; Lam, Ringo C.W. et al. / Photocatalytic decolorization of anthraquinonic dye by TiO₂ thin film under UVA and visible-light irradiation. In: Chemical Engineering Journal. 2007 ; Vol. 129, No. 1-3. pp. 153-159.