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


Bavykin, Dmitry V., Kulak, Alexander N., Shvalagin, Vitaly V., Andryushina, Natalia S. and Stroyuk, Olexander L. (2011) Photocatalytic properties of rutile nanoparticles obtained via low temperature route from titanate nanotubes Journal of Photochemistry and Photobiology A: Chemistry, 218, (2-3), pp. 231-238. (doi:10.1016/j.jphotochem.2011.01.006).

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Description/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 ºC results in the formation of rutile spheroidal nanoparticles, which are characterised 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 characterised 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

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.jphotochem.2011.01.006
ISSNs: 1010-6030 (print)
Keywords: solvothermal synthesis, reflux, surface area, stability, mechanism, rutile nanoparticles, photocatalysis, hydrogen generation, advanced oxidation
Subjects:
Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 175775
Date :
Date Event
February 2011Published
Date Deposited: 28 Feb 2011 12:58
Last Modified: 18 Apr 2017 02:52
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/175775

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