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Preparation of hollow Ag/Pt heterostructures on TiO2 nanowires and their catalytic properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
45251 46407 2016 7 PDF Available
Title
Preparation of hollow Ag/Pt heterostructures on TiO2 nanowires and their catalytic properties
Abstract

•TiO2 NW@hollow Ag/Pt heterostructure catalyst was successfully prepared.•The catalyst provides accessible interfaces and high surface-to-volume ratio.•The hollow Ag/Pt nanostructures supply defects, vacancies and boundaries.•The catalyst shows enhanced catalytic activity and excellent reusability.

A novel titanate (TiO2) nanowire (NW)@hollow silver (Ag)/platinum (Pt) heterostructure was fabricated by means of a simple wet chemical method. Briefly, Ag nanoparticles with ∼20 nm in diameter were grown onto TiO2 nanowires, subsequently PtO shells with ∼1 to 4 nm in thickness were deposited upon the Ag nanoparticles to form TiO2–NW@Ag–NP@PtO nanostructures. The hollow Ag-/PtOx nanostructures were achieved from Ag–NP@PtO nanostructures by outward diffusion of Ag elements from Ag–NP core to PtO shell via H2O2 treatment. Finally, hollow Ag/Pt heterostructures with diameter of approximately 20 nm were synthesized by reduction of the hollow Ag-/PtOx nanostructures. Given the accessible interfaces of bimetallic Ag/Pt shell, the catalytic efficiency of the TiO2 NW@hollow Ag/Pt heterostructures was significantly enhanced, which was confirmed by the hydrogenation of p-nitrophenol into p-aminophenol with NaBH4 as reducing agent in aqueous phase. The conversion rate of p-nitrophenol was yielded as high as ∼95% for 9 min under ambient atmosphere and room temperature.

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Keywords
Ag/Pt; Heterostructure; Hollow; Interfaces; Catalytic property
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Preparation of hollow Ag/Pt heterostructures on TiO2 nanowires and their catalytic properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 344–350
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