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Degradation of p-nitrophenol and bacteria with TiO2 xerogels sensitized in situ with tetra(4-carboxyphenyl)porphyrins

Paper ID Volume ID Publish Year Pages File Format Full-Text
26819 43980 2013 10 PDF Available
Title
Degradation of p-nitrophenol and bacteria with TiO2 xerogels sensitized in situ with tetra(4-carboxyphenyl)porphyrins
Abstract

•TiO2 xerogels sensitization in one step by the in situ introduction of porphyrins.•Control of the porous texture and crystallization of TiO2 xerogels.•40% of p-nitrophenol degradation under visible light by porphyrin-doped TiO2.•Degradation of 108 cfu mL−1 of Escherichia coli and of Lactobacillus rhamnosus by porphyrin-doped TiO2.

TiO2-based materials doped with porphyrins have been prepared using a sol–gel process. To stabilize the TiO2-dye interactions, free metal tetra(4-carboxyphenyl)porphyrin and nickel tetra(4-carboxyphenyl)porphyrin were introduced in situ into the TiO2 matrix during the sol–gel process rather than by grafting. Samples were thoroughly characterized by TEM, X-ray diffraction, FT-IR, DR-UV/vis and their texture has been examined by nitrogen adsorption–desorption at 77 K. The low thermal treatment allows obtaining anatase-TiO2 particles with high specific surface area without porphyrin degradation. A significant improvement of the photoactivity under visible light of porphyrin doped-TiO2 xerogels was observed for p-nitrophenol and for bacterial degradation.

Keywords
Sol–gel synthesis; Photocatalytic degradation; p-Nitrophenol; Escherichia coli; Lactobacillus rhamnosus; Porphyrin sensitization
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Degradation of p-nitrophenol and bacteria with TiO2 xerogels sensitized in situ with tetra(4-carboxyphenyl)porphyrins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 272, 15 November 2013, Pages 90–99
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