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Nano-TiO2 sols immobilized on porous silica as new efficient photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
44013 45999 2007 7 PDF Available
Title
Nano-TiO2 sols immobilized on porous silica as new efficient photocatalyst
Abstract

Nanocoatings of an extremely small thickness below 10 nm prepared from metastable chemically active TiO2 colloids demonstrate both high mechanical stability and internal efficiency in photocatalysis [M. Benmami, K. Chhor, A. Kanaev, Chem. Phys. Lett. 422 (2006) 552]. To overcome their inherently low absorption, porous substrates of high UV transparency have to be used. We have studied influence of substrate on the nanocatalyst performance. The catalyst prepared by impregnation of 6.0 nm TiO2 particles in nanoporous silica granulate at mass loading of ∼0.55% demonstrates the highest photocatalytic efficiency of 0.45 (TCE test). The catalyst specific surface of 330 m2/g is almost not affected by the particle impregnation. Our results show a high potential of this nanostructured catalyst for applications in reactive gas cleaning.

Graphical abstractThe catalyst prepared by impregnation of 6.0 nm TiO2 particles in nanoporous silica granulate at mass loading of ∼0.55% demonstrates the highest photocatalytic efficiency of 0.45 (TCE test). The catalyst specific surface of 330 m2/g is almost not affected by the particle impregnation. Our results show a high potential of this nanostructured catalyst for applications in reactive gas cleaning.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Nanocoatings; Photocatalysis; TiO2 nanoparticles; Sol–gel process; Porous silica
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Nano-TiO2 sols immobilized on porous silica as new efficient photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 332, Issue 2, 20 November 2007, Pages 297–303
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