The University of Southampton
University of Southampton Institutional Repository

Effect of TiOSO4 hydrothermal hydrolysis conditions on TiO2 morphology and gas-phase oxidative activity

Record type: Article

The effect of synthesis conditions on morphology and catalytic activity has been studied for hydrothermal preparation of TiO2 from acidified aqueous TiOSO4 solution. It was found that the increase in TiOSO4 and H2SO4 concentration results in the increase of photocatalytic activity of produced TiO2, as it was revealed by steady-state gas-phase oxidation of acetone and ethanol vapors in a flow-circulating reactor. TiOSO4 concentration exerts strong influence on the shape of the produced TiO2 particles. At TiOSO4 concentration less than 0.1 wt%, hydrolysis gives rise to hedgehog-like agglomerates consisting of spliced-blade TiO2 nanocrystals. At higher concentration of TiOSO4, the resultant TiO2 consists of round agglomerates of 5–10 nm primary particles. The size of secondary particles depends mainly on the H2SO4 concentration. The increase of the time of hydrothermal treatment results in the enhancement of TiO2 photocatalytic activity that reaches a maximum. Among different acids (HCl, HClO4, HNO3, H3PO4 and CH3COOH) added during hydrolysis of TiOSO4, sulfuric and acetic acids had the best effect on photocatalytic activity of TiO2. The results obtained can help to finely tune this TiO2 preparation method in order to obtain desirable particles size, shape and activity.

Full text not available from this repository.

Citation

Bavykin, Dmitry V., Dubovitskaya, Vera P., Vorontsov, Alexander V. and Parmon, V.N. (2007) Effect of TiOSO4 hydrothermal hydrolysis conditions on TiO2 morphology and gas-phase oxidative activity Research on Chemical Intermediates, 33, (3-5), pp. 449-464. (doi:10.1163/156856707779238702).

More information

Published date: 2007
Keywords: photocatalyst, acetone, ethanol, photo-oxidation, slectivity, tem
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 46068
URI: http://eprints.soton.ac.uk/id/eprint/46068
ISSN: 0922-6168
PURE UUID: 852501b6-730d-4f55-9233-ab6b8c68d127

Catalogue record

Date deposited: 17 May 2007
Last modified: 17 Jul 2017 15:09

Export record

Altmetrics

Contributors

Author: Vera P. Dubovitskaya
Author: Alexander V. Vorontsov
Author: V.N. Parmon

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×