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Boosting photocatalytic activity of Pd decorated TiO2 nanocrystal with exposed (001) facets for selective alcohol oxidations

Paper ID Volume ID Publish Year Pages File Format Full-Text
44777 46347 2016 8 PDF Available
Title
Boosting photocatalytic activity of Pd decorated TiO2 nanocrystal with exposed (001) facets for selective alcohol oxidations
Abstract

•Solvothermal hydrolysis combining photoreduction deposition route.•Pd decoration on TiO2 nanocrystal with exposed (001) facets.•Photocatalytic selective alcohol oxidations under UV-light irradiation.•Boosting photocatalytic activity via synergetic promoting effects.

Pd decorated TiO2 nanocrystal with exposed (001) facets was synthesized via solvothermal hydrolysis combining photoreduction deposition route, which exhibited a great enhancement in activity and stability of photocatalytic selective alcohol oxidations under UV light irradiation in aqueous medium. The superior activity of Pd decorated TiO2 nanocrystal with exposed (001) facets was attributed to the synergistic promoting effects of the following factors: firstly, the exposed (001) facets with higher surface energy facilitated the activation of reactant molecules and the photocatalytic oxidation; secondly, the increased oxygen vacancies and enhanced O2 adsorption on (001) facets could trap photoelectrons and thus, inhibit their recombination with holes; thirdly, the decoration with Pd nanoparticles effectively reduce the photocharge recombination rate by capturing photoelectrons. Meanwhile, this photocatalyst displayed excellent durability owning to the strong Pd-TiO2 interaction against deactivation caused by either Pd leaching or Pd aggregation.

Graphical abstractTiO2 nanocrystal with exposed (001) facets and Pd nanoparticles was synthesized by solvothermal hydrolysis combining photoreduction deposition route, which exhibited high activity in selective alcohol oxidations in aqueous medium under UV light irradiation owning to synergistic promoting effects via the high crystallization degree, the (001) facets with high surface energy and abundant surface oxygen vacancies, enhanced O2 adsorption, and strong Pd-TiO2 interaction.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
TiO2 nanocrystal; Exposed (001) facets; Pd nanoparticles; Selective oxidation; Aromatic alcohols
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Boosting photocatalytic activity of Pd decorated TiO2 nanocrystal with exposed (001) facets for selective alcohol oxidations
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 195, 15 October 2016, Pages 141–148
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
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