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Photocatalytic properties of rutile nanoparticles obtained via low temperature route from titanate nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
27639 44034 2011 8 PDF Available
Title
Photocatalytic properties of rutile nanoparticles obtained via low temperature route from titanate nanotubes
Abstract

Acid treatment of titanate nanotubes with 0.1 mol dm−3 H2SO4 results in their transformation into various forms of nanostructured TiO2, the shape and crystal structure of which depend on the temperature and time of treatment. Such a transformation at 25 °C results in the formation of rutile spheroidal nanoparticles, which are characterized by good crystallinity, high specific surface area (ca 250 m2 g−1 BET) and small average diameter of particles (ca. 3 nm). These particles are also characterized by increased activity in reactions of both photocatalytic generation of hydrogen from alcohol and advanced oxidation of organic species (ethanol). Acid assisted transformation of nanotubes at higher temperatures results in formation of nanostructured anatase/titanate composites with lower photocatalytic activity. The mechanism of transformation and the reasons for increased activity of rutile nanoparticles are discussed.

Keywords
Solvothermal synthesis; Reflux; Surface area; Stability; Mechanism; Rutile nanoparticles; Photocatalysis; Hydrogen generation; Advanced oxidation
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Photocatalytic properties of rutile nanoparticles obtained via low temperature route from titanate nanotubes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 218, Issues 2–3, 25 February 2011, Pages 231–238
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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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