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

被引：15

作者：

Ganadu, Maria L. ^{[1
]}

Andreotti, Leonardo ^{[2
]}

Vitali, Irene ^{[2
]}

Maldotti, Andrea ^{[2
]}

Molinari, Alessandra ^{[2
]}

Mura, Giovanni M. ^{[1
]}

机构：

[1] Univ Sassari, Dipartimento Chim, Via Vienna 2, I-07100 Sassari, Italy

[2] Univ Ferrara, ISOF CNR Sez Ferrara, Dipartimento Chim, I-44100 Ferrara, Italy

来源：

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES | 2002年 / 1卷 / 12期

关键词：

D O I：

10.1039/b109953c

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Catalytic amounts of glucose oxidase from Aspergillus niger (GO) are active in the reduction of O-2 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.

引用

页码：951 / 954

页数：4

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