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Pt deposited TiO2 films with exposed {0 0 1} facets for photocatalytic degradation of a pharmaceutical pollutant

Paper ID Volume ID Publish Year Pages File Format Full-Text
38794 45791 2016 8 PDF Available
Title
Pt deposited TiO2 films with exposed {0 0 1} facets for photocatalytic degradation of a pharmaceutical pollutant
Abstract

•A new TiO2 films with exposed {0 0 1} facets and uniform Pt NPs on the crystal facets were fabricated on a Ti substrate.•The morphology, size, number density, deposition facet and chemical states of Pt NPs on TiO2 film were investigated.•The Pt-TiO2 film shows considerably higher UV photocatalytic activity than TiO2 film with exposed {0 0 1} facets.•The Pt-TiO2 film shows significant potential for application in photocatalytic degradation of PPCPs with amide bonds.

TiO2 films with exposed {0 0 1} facets and uniform Pt nanoparticles on the crystal facets were fabricated on a Ti substrate using a simple low temperature electrostatic self-assembly method. Proper Pt colloidal pH value was selected by determining ξ potential of Pt NPs and TiO2 film with exposed {0 0 1} facets. Ultra high-resolution FESEM observation shows that Pt NPs with diameter of 2–4 nm were physically separated and dispersed on TiO2 facets. The Pt NPs were found to be apt to deposit on the {1 0 1} facet with more positive surface potential of TiO2 film and the mean size and the number density of Pt NPs on different facet could be rationally tailored by controlling immersion time of TiO2 film with exposed {0 0 1} facets. The Pt-TiO2 film with exposed {0 0 1} facets prepared at immersion time of 5 min shows considerably higher UV photocatalytic activity than TiO2 film with exposed {0 0 1} facets and single UV irradiation for all the experimented initial ethenzamide concentrations, and also no deactivation was observed during 3 recyling runs. The UV photocatalysis employing Pt-TiO2 film with exposed {0 0 1} facets as photocatalyst shows significant potential for application in degradation of pharmaceutical and personal care products (PPCPs) with amide bonds.

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Keywords
Pt-TiO2 films; {0 0 1} Facets; Photocatalytic degradation; PPCPs; Ethenzamide
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Pt deposited TiO2 films with exposed {0 0 1} facets for photocatalytic degradation of a pharmaceutical pollutant
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 521, 5 July 2016, Pages 75–82
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