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), 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
ISSNs: 1010-6030
Keywords: solvothermal synthesis, reflux, surface area, stability, mechanism, rutile nanoparticles, photocatalysis, hydrogen generation, advanced oxidation
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 175775
Date Deposited: 28 Feb 2011 12:58
Last Modified: 27 Mar 2014 19:22
Projects:
The hydrothermal route to metal oxide nanotubes: synthesis and energy conversion application. A First Grant Proposal
Funded by: EPSRC (EP/F044445/1)
Led by: Dmitry V. Bavykin
15 September 2008 to 14 September 2010
URI: http://eprints.soton.ac.uk/id/eprint/175775

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