Evidence for Fenton photoassisted processes mediated by encapsulated Fe ions at biocompatible pH values

被引：86

作者：

Fernandez, J

Dhananjeyan, MR

Kiwi, J ^{[1
]}

Senuma, Y

Hilborn, J

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Chem 2, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Dept Mat, Polymer Lab, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 22期

关键词：

D O I：

10.1021/jp9943777

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tron alginate gel beads were prepared starting from sodium alginate solutions. Fe complexed with carboxylate is active during the Fenton-enhanced decoloration/degradation of Orange II via the encapsulated Fe catalyst. By energy-dispersive X-ray microanalysis (EDX) it was shown that a significant amount of Fe was on the catalyst surface and only a smaller fraction inside the cross-linked Fe alginate. The Fe alginate heads were similar to 2 mm in diameter containing highly dispersed Fe species with sizes of about 0.5 nm. The Fe alginate mediated decoloration of Orange IT takes place in less than an hour in the presence of H2O2 under visible light irradiation, at pH values between 5 and 8. Repetitive decoloration of Orange II solutions was observed by addition of the azo dye at the beginning of each cycle.

引用

页码：5298 / 5301

页数：4

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