Issue 12, 2002

Glucose oxidase catalyses the reduction of O2 to H2O2 in the presence of irradiated TiO2 and isopropyl alcohol

Abstract

Catalytic amounts of glucose oxidase from Aspergillus niger (GO) are active in the reduction of O2 to H2O2 in the presence of irradiated suspensions of TiO2 and isopropyl alcohol as electron donor. An explanation of this behaviour is given on the basis of the ability of the enzyme to capture electrons from the photoexcited TiO2 instead of its natural substrate, glucose. This process has a marked positive effect on both the oxidation of isopropyl alcohol to acetone and the formation of radical intermediates, which have been detected, for the first time, by EPR–spin trapping investigation.

Graphical abstract: Glucose oxidase catalyses the reduction of O2 to H2O2 in the presence of irradiated TiO2 and isopropyl alcohol

Article information

Article type
Paper
Submitted
31 Oct 2001
Accepted
03 Oct 2002
First published
24 Oct 2002

Photochem. Photobiol. Sci., 2002,1, 951-954

Glucose oxidase catalyses the reduction of O2 to H2O2 in the presence of irradiated TiO2 and isopropyl alcohol

M. L. Ganadu, L. Andreotti, I. Vitali, A. Maldotti, A. Molinari and G. M. Mura, Photochem. Photobiol. Sci., 2002, 1, 951 DOI: 10.1039/B109953C

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