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Photodecomposition of phenol by silica-supported porphyrin derivative in polymer microchannel chips

Paper ID Volume ID Publish Year Pages File Format Full-Text
28592 44081 2006 7 PDF Available
Title
Photodecomposition of phenol by silica-supported porphyrin derivative in polymer microchannel chips
Abstract

Silica gel beads (diameter ∼10 μm) covalently modified with metal-free monopyridyltriphenylporphyrin (PyTPP) via a silane coupling reagent (PyTPP-SiO2) were introduced into a polymer microchannel and, the microchip was applied to photodecomposition of phenol under solution-flow conditions. The photodecomposition yield of phenol in the microchannel was dependent on the solution-flow rate (ν) and increased with decreasing ν. At ν = 0.5 μL/min, the decomposition yield was as high as 93% with the reaction time of 42 s, while that in a bulk aqueous PyTPP-SiO2 suspension was 73% with the reaction time of 2 h. In the microchannel chip experiments, furthermore, the yield increased with decreasing the thickness of the solution-flow layer above the PyTPP-SiO2 particles. On the basis of optical trapping-absorption microspectroscopy of single PyTPP-SiO2 particles before and after the photoreaction, we discuss characteristics of the photoreaction in the microchannel accommodated with PyTPP-SiO2 particles.

Keywords
Polymer microchannel chip; Singlet oxygen; Microspectroscopy; Photodecomposition; Silica-supported catalyst
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Photodecomposition of phenol by silica-supported porphyrin derivative in polymer microchannel chips
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 184, Issues 1–2, 15 November 2006, Pages 170–176
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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