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Enhanced photocatalytic H2-production activity of anatase TiO2 nanosheet by selectively depositing dual-cocatalysts on {101} and {001} facets

Paper ID Volume ID Publish Year Pages File Format Full-Text
44738 46344 2016 9 PDF Available
Title
Enhanced photocatalytic H2-production activity of anatase TiO2 nanosheet by selectively depositing dual-cocatalysts on {101} and {001} facets
Abstract

•Anatase TiO2 nanosheet with exposed {101} and {001} facets.•Cocatalysts Pt and Co3O4 selectively deposited on {101} and {001} facets.•The prepared TiO2-Co3O4-Pt exhibited enhanced H2-production activity.•The synergetic effect of the surface heterojunction and the dual-cocatalysts.

The photocatalytic hydrogen production using solar energy through water splitting has received great attention due to the increasingly serious energy crisis. Herein, we report the controlled preparation of anatase TiO2 nanosheet photocatalyst by selectively depositing Co3O4 nanoparticles (NPs) as water oxidation cocatalyst (WOC) and Pt NPs as water reduction cocatalyst (WRC) on {001} and {101} facets, respectively, using a two-step photodeposition method. The prepared TiO2-Co3O4-Pt composite photocatalyst exhibits a greatly enhanced photocatalytic H2-production activity at the optimal weight percentage of Co3O4 and Pt (both 1.0 wt%), exceeding that of TiO2 nanosheet deposited with single Co3O4 or Pt cocatalyst by 9.4 and 1.8 times, respectively. The enhanced H2-production activity is due to the synergetic effect of surface heterojunction between {001} and {101} facets and selective deposition of Co3O4 and Pt dual-cocatalysts at {001} and{101} facets, respectively. The former is beneficial for the transfer and separation of charge carriers, the latter can reduce the recombination rate of photogenerated electrons and holes and also catalyze the redox reactions. This work will provide a new route for the rational design and fabrication of highly efficient photocatalysts with dual-cocatalysts through selective surface deposition.

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Keywords
TiO2 nanosheet; Surface heterojunction; Cocatalysts; Selective deposition; Hydrogen production
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Enhanced photocatalytic H2-production activity of anatase TiO2 nanosheet by selectively depositing dual-cocatalysts on {101} and {001} facets
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 198, 5 December 2016, Pages 286–294
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