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The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation

Paper ID Volume ID Publish Year Pages File Format Full-Text
45969 46427 2014 7 PDF Available
Title
The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation
Abstract

•The •OH radicals in Fenton and UV/Fenton processes were analyzed quantitatively.•The substitutions affected the catalytic activity of magnetite in •OH generation.•Cr substituted magnetite displayed the best catalytic activity in •OH generation.•The relationship between •OH generation and pollutant degradation was discussed.•Multivariate analyses were carried out to interpret the main influence factors.

In this paper, the heterogeneous Fenton and UV/Fenton catalytic activities of transition metal substituted magnetites, Fe3−xMxO4 (M = Ti, Cr, Mn, Co and Ni), were compared in the perspective of •OH radicals generation. In heterogeneous Fenton reaction, the substitutions of Cr(III), Mn(II) and Co(II) enhanced the rate of •OH formation, while Ni(II) and Ti(VI) showed the negative effect. In heterogeneous UV/Fenton reaction, the Ni(II) and Co(II) introduction did not show notable changes on •OH generation efficiency, whetreas the Cr(III), Ti(VI) and Mn(II) incorporation improved this reaction and accordingly enhanced the UV/Fenton catalytic activity of magnetite. Redundancy and Pearson correlation analyses were carried out to interpret the influence factors in Fenton and UV/Fenton reactions.

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Keywords
Magnetite; Hydroxyl radicals; Isomorphous substitution; Heterogeneous Fenton; UV/Fenton
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The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 150–151, 5 May 2014, Pages 612–618
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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