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Novel green activation processes and mechanism of peroxymonosulfate based on supported cobalt phthalocyanine catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
45037 46395 2014 8 PDF Available
Title
Novel green activation processes and mechanism of peroxymonosulfate based on supported cobalt phthalocyanine catalyst
Abstract

•PMS activation with ACFs-CoPc for highly efficient elimination of dyes.•ACFs-CoPc exhibited remarkable reusability without detectable Co ion leaching.•ACFs-CoPc/PMS underwent both OH and SO4− mechanism.

Catalytic activation of peroxymonosulfate (PMS) to generate radicals has received considerable and increasing attention in environmental catalysis field. The development of highly efficient and environmentally friendly oxidation processes has been one of the most important and greatly challenging goals in PMS activation field. Herein, an effective and stable catalyst (ACFs-CoPc) was proposed for PMS activation by supporting cobalt phthalocyanine (CoPc) onto activated carbon fibers (ACFs) covalently. With the dye of Acid Red 1 (AR1) as probe compound, ACFs-CoPc could effectively activate PMS to eliminate AR1, and the catalytic activity of ACFs-CoPc was almost not impaired during ten successive runs without detectable cobalt leaching, indicating that ACFs-CoPc/PMS system was a pro-environmental and efficient oxidation system. A hybrid method that combines electron paramagnetic resonance (EPR) technology with different radical scavengers effect on PMS activation was employed for the investigation of active species during the catalytic reaction. It was found that both hydroxyl and sulfate radical (OH, SO4−) were generated; importantly, SO4− was speculated to serve as the dominant active species in the catalytic oxidation of AR1. Based on these results, a possible mechanism was proposed.

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Keywords
Activated carbon fibers; Cobalt phthalocyanine; Peroxymonosulfate; Catalytic activation; Mechanism
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Novel green activation processes and mechanism of peroxymonosulfate based on supported cobalt phthalocyanine catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 154–155, July–August 2014, Pages 36–43
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us