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Facile synthesis and photocatalytic activity of platinum decorated TiO2 − xNx: Perspective to oxygen vacancies and chemical state of dopants

Paper ID Volume ID Publish Year Pages File Format Full-Text
50777 46813 2012 5 PDF Available
Title
Facile synthesis and photocatalytic activity of platinum decorated TiO2 − xNx: Perspective to oxygen vacancies and chemical state of dopants
Abstract

Nanotubular titanic acid obtained by hydrothermal method was selected as a precursor to prepare platinum decorated TiO2 − xNxvia a facile one-pot route. Photocatalytic activity of Pt/TiO2 − xNx for visible-light induced degradation of propylene was evaluated in relation to the synergistic effect among single-electron-trapped oxygen vacancies and dopants N plus Pt. It is proposed that oxygen vacancies induce a new sub-band between the valence band and conduction band of TiO2 resulting in visible light response of Pt/TiO2 − xNx; the synergistic effect among oxygen vacancies and dopants leads to enhanced photocatalytic activity of as-synthesized Pt/TiO2 − xNx. Moreover, the effect of chemical state of dopants on visible light photoactivity is discussed in detail.

► Pt/TiO2 − xNx was prepared via a facile one-pot synthesis. ► Nanotubular titanic acids were specially selected as codoped precursors. ► Dopants Pt with superfine size were well dispersed on the surface of TiO2. ► Oxygen vacancies played an important role in visible light sensitization. ► Photocatalytic degradation mechanisms of C3H6 over Pt/TiO2 − xNx was proposed.

Keywords
TiO2; Nitrogen doping; Platinum; Photocatalytic activity; Oxygen vacancies
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Facile synthesis and photocatalytic activity of platinum decorated TiO2 − xNx: Perspective to oxygen vacancies and chemical state of dopants
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 20, 5 April 2012, Pages 46–50
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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Any Questions? feel free to contact us