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Photocatalytic oxidation activities of TiO2 nanorod arrays: A surface spectroscopic analysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
45266 46407 2016 7 PDF Available
Title
Photocatalytic oxidation activities of TiO2 nanorod arrays: A surface spectroscopic analysis
Abstract

•Characterization of Ti3+ state or oxygen vacancy in TiO2 nanorod by XAS and XPS•Variation of Ti and O electronic states by the defect formation in TiO2 nanorod•Evolution of Ti3+ defects on TiO2 nanorod arrays as increasing growth time•Photocatalytic-oxidation on TiO2 nanorod arrays having Ti3+ defect sites

The correlation between the defect structures of hydrothermally grown TiO2 nanorods (TNR) and their photocatalytic activity has been investigated by using various surface spectroscopic analysis techniques including scanning transmission X-ray microscopy (STXM) and high-resolution photoemission spectroscopy (HRPES). Defect states related to Ti3+ and oxygen vacancies in TNR were observed when the growth time was over 90 min (i.e., those over 500 nm in height), and these TNR samples showed photocatalytic oxidation activity with respect to the molecules 2-mercaptoethanol (2-ME) or 2-aminothiophenol (2-ATP), also confirmed by HRPES. The presence of defect structures on the TNR influences on the electronic states of titanium and oxygen, and thus can improve the catalytic oxidation reactions.

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Keywords
Photo-oxidation reaction; TiO2 nanorods; Photocatalyst; HRPES; STXM
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Photocatalytic oxidation activities of TiO2 nanorod arrays: A surface spectroscopic analysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 480–486
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
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Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us