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Influence of the Ti content on the photocatalytic oxidation of 2-propanol and CO on TiSiBEA zeolites

Paper ID Volume ID Publish Year Pages File Format Full-Text
50839 46818 2012 4 PDF Available
Title
Influence of the Ti content on the photocatalytic oxidation of 2-propanol and CO on TiSiBEA zeolites
Abstract

TixSiBEA (x = 1.5, 3.2 and 5.8 Ti wt.%) zeolites were prepared by a two-step postsynthesis method reported earlier (Chem. Commun. 1998, 87). Diffuse reflectance (DR) UV–vis and photoluminescence data suggest that mainly isolated tetrahedral framework Ti ions are present in Ti1.5SiBEA and Ti3.2SiBEA zeolites. These ions which in their excited triplet state easily interact with CO molecules as shown by photoluminescence data, are believed to be the active sites of the photocatalytic liquid phase oxidation of 2-propanol by dissolved oxygen and of photocatalytic gas phase oxidation of CO by N2O as suggested by catalytic measurements.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Isolated tetrahedral framework Ti species mainly present in TiSiBEA zeolites. ► These Ti species in their excited triplet state are active sites of the photocatalytic oxidation of 2-propanol and CO. ► Photocatalytic activity of TiSiBEA depends on Ti content and is related to the amount of tetrahedral and octahedral Ti(IV).

Keywords
Ti; BEA; Zeolite; Photoluminescence; Photocatalysis; Oxidation
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Influence of the Ti content on the photocatalytic oxidation of 2-propanol and CO on TiSiBEA zeolites
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 19, March 2012, Pages 17–20
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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