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The effect of hole acceptors on the photocurrent response of particulate TiO2 anodes

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Byrne, JA, Eggins, BR, Linquette-Mailley, S and Dunlop, PSM (1998) The effect of hole acceptors on the photocurrent response of particulate TiO2 anodes. ANALYST, 123 (10). pp. 2007-2012. [Journal article]

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Abstract

The effect of different hole accepters on the photocurrent response of particulate TiO2 anodes was investigated. In all cases there was a significant increase in the photocurrent over that observed for the photoooxidation of water. The photocurrent efficiency observed in the presence of hole accepters followed the order: oxalate > formate > acetate > methanol. The order of efficiency of the hole accepters does not correlate with reported free hydroxyl radical reactivity constants or with reported oxidation potentials for the substrates studied. Adsorption measurements made in the dark showed that oxalate was much more strongly adsorbed on the electrode surface than either acetate or formate. Impedance spectroscopy indicated an increase in the capacitance of the system due to the presence of oxalate, both in the dark and under illumination.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:7498
Deposited By:Dr Patrick Dunlop
Deposited On:18 Jan 2010 12:15
Last Modified:18 Aug 2011 11:15

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