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Cyclohexane photocatalytic oxidation on Pt/TiO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
55043 47038 2013 6 PDF Available
Title
Cyclohexane photocatalytic oxidation on Pt/TiO2 catalysts
Abstract

Gas-solid heterogeneous photocatalytic oxidation (PCO) of cyclohexane in humidified air over TiO2 and Pt/TiO2 catalyst was studied.Pt/TiO2 photocatalysts were synthesized by photodeposition method at different Pt loadings (0.5–2 wt.%). The addition of 0.5 wt.% Pt does not significantly modify the TiO2 properties. The increase in Pt loading induces to an aggregation of metallic particles on TiO2 surface.The cyclohexane PCO was performed in a fluidized bed photoreactor at 60 and 100 °C. Pure TiO2 was more active than 1 and 2 wt.% Pt/TiO2 samples at 60 °C. Nevertheless, the conversion level increases with temperature on Pt/TiO2 photocatalysts. The cyclohexane was mineralized into CO2, water and low amount of CO. A beneficial effect of Pt addition was found, since total CO2 selectivity was obtained. The Pt/TiO2 photocatalysts prepared by photodeposition provide the total cyclohexane PCO without CO production. Photocatalysts deactivation was not observed in any performed test. Evidence of an opportune tuning of temperature is highlighted.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (187 K)Download as PowerPoint slideHighlights► Gas-solid photocatalytic oxidation of cyclohexane over TiO2 and Pt/TiO2. ► Study of the effect of platinum loading and reaction temperature. ► High influence of platinum loading on CO2 selectivity. ► Low conversion levels and no production of CO were obtained over Pt/TiO2 photocatalysts.

Keywords
Pt/TiO2; Photodeposition; Photocatalytic oxidation (PCO); Cyclohexane
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Cyclohexane photocatalytic oxidation on Pt/TiO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 164–169
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