Kinetic and mechanistic overview of TiO2-photocatalyzed oxidation reactions in aqueous solution

Destruction of trace organic compounds in water by photocatalytic oxidation over titanium dioxide is the subject of worldwide interest. In this paper we review chemical mechanisms and identify some band gap and thermodynamic limitations that must be considered in limiting a solar-driven process. Rec...

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Bibliographic Details
Published in:Solar energy materials 1991-12, Vol.24 (1-4), p.584-593
Main Authors: BLAKE, D. M, WEBB, J, TURCHI, C, MAGRINI, K
Format: Article
Language:English
Subjects:
140505 - Solar Energy Conversion- Photochemical, Photobiological, & Thermochemical Conversion- (1980-)
400500 - Photochemistry
ACID CARBONATES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
Chemistry
CONVERSION
DECOMPOSITION
ENERGY CONVERSION
Exact sciences and technology
General and physical chemistry
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KINETICS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
REACTION KINETICS
SOLAR ENERGY
SOLAR ENERGY CONVERSION
SOLAR THERMAL CONVERSION
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
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Summary:Destruction of trace organic compounds in water by photocatalytic oxidation over titanium dioxide is the subject of worldwide interest. In this paper we review chemical mechanisms and identify some band gap and thermodynamic limitations that must be considered in limiting a solar-driven process. Recent work will be discussed which tests predictions made by the mechanism concerning dependence of rates of destruction on light flux and on the presence of bicarbonate ion, a known hydroxyl radical scavenger.
ISSN:0165-1633
DOI:10.1016/0165-1633(91)90092-Y