UNSPECIFIED. (2004) Scanning electrochemical microscopy investigation of the photodegradation kinetics of 4-chlorophenol sensitised by TiO2 films. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 6 (22). pp. 5218-5224. ISSN 1463-9076

Full text not available from this repository.

Abstract

Scanning electrochemical microscopy (SECM) has been used to investigate quantitatively the photodegradation kinetics of 4-chlorophenol (4-CP), in aerated and oxygenated aqueous solutions, at back-illuminated TiO2 films deposited from a suspension of Degussa P25 TiO2 powder at the end of an optical fibre. A potentiometric Ag/AgCl ultramicroelectrode (UME), positioned at a known distance above the TiO2 film, was used to monitor directly the Cl- production from the photodegradation of 4-CP. The effects of both light intensity and 4-CP concentration were investigated and the associated kinetics were determined. Amperometric measurements with a Pt UME demonstrated that O-2 was depleted significantly adjacent to the TiO2 surface under these conditions. A theoretical model, which employs a Langmuir-Hinshelwood type kinetic equation, has been developed to interpret the kinetics of the photodegradation process and determine the associated quantum efficiency.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Journal or Publication Title:	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Publisher:	ROYAL SOC CHEMISTRY
ISSN:	1463-9076
Date:	2004
Volume:	6
Number:	22
Number of Pages:	7
Page Range:	pp. 5218-5224
Identification Number:	10.1039/b412328j
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/7795

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item