Photoelectrochemical measurement of phthalic acid adsorption on porous TiO 2 film electrodes

Dianlu Jiang; Huijun Zhao; Shanqing Zhang; Richard John; Geoffrey D Will

doi:10.1016/S1010-6030(02)00409-4

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Photoelectrochemical measurement of phthalic acid adsorption on porous TiO 2 film electrodes

Journal article

Peer reviewed

Photoelectrochemical measurement of phthalic acid adsorption on porous TiO 2 film electrodes

Dianlu Jiang, Huijun Zhao, Shanqing Zhang, Richard John and Geoffrey D Will

Journal of Photochemistry and Photobiology, A: Chemistry, Vol.156(1-3), pp.201-206

2003

DOI: https://doi.org/10.1016/S1010-6030(02)00409-4

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Abstract

Adsorption

Nanoporous TiO 2 film

Photoelectrochemistry

Phthalic acid

A new adsorption measurement method based on photoelectrochemical oxidation principles has been developed. The method can be used to directly quantify the amount of adsorbates at a TiO2 electrode surface in a sensitive and accurate manner. The adsorption of phthalic acid was studied as a test case. The relationship between the amount of adsorbate at the TiO2 surface and the concentration of phthalic acid in the solution was obtained. The adsorption of phthalic acid on TiO2 surface was shown to follow a Langmuir type adsorption model. For the first time, the adsorption equilibrium constant of an adsorbate at TiO2 surface has been photoelectrochemically measured. The adsorption equilibrium constant of phthalate on TiO2 porous film at pH 4.0, K=4.0×104 M−1, was obtained using our method, which was close to that obtained by conventional methods. The effect of solution pH on the amount of adsorbate at TiO2 surface was also investigated. The results indicate the adsorption of phthalic acid is mainly of chemical bonding nature.

Details

Title: Photoelectrochemical measurement of phthalic acid adsorption on porous TiO 2 film electrodes
Authors: Dianlu Jiang (Author) - Griffith University
Huijun Zhao (Corresponding Author) - Griffith University
Shanqing Zhang (Author) - Griffith University
Richard John (Author) - Griffith University
Geoffrey D Will (Author) - Queensland University of Technology
Publication details: Journal of Photochemistry and Photobiology, A: Chemistry, Vol.156(1-3), pp.201-206
Publisher: Elsevier BV
DOI: 10.1016/S1010-6030(02)00409-4
ISSN: 1873-2666
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737874302621
Output Type: Journal article

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