Chimupala, Y and Drummond-Brydson, R orcid.org/0000-0003-2003-7612 (2018) Hydrothermal Synthesis and Phase Formation Mechanism of TiO2(B) Nanorods via Alkali Metal Titanate Phase Transformation. In: Solid State Phenomena. 35th International Conference of the Microscopy Society of Thailand, 30 Jan - 02 Feb 2018, Thailand. Trans Tech Publications , pp. 23-36. ISBN 9783035713497
Abstract
Titanium dioxide (B phase) with 1-D structures was successfully fabricated via a hydrothermal method with a subsequent ion-exchange process and calcination. P25, titanium isopropoxide (TTIP), rutile and also anatase were used as Ti precursors in the alkali hydrothermal system. TTIP promoted an elongation of nanorod morphology whereas the other precursors produced short nanorod structures. The different types of titanium precursors did not have any influence on the phase transformation during the fabrication process. Na2Ti6O13 was the primary intermediate product after washing the hydrothermal sample. H2Ti3O7 was the secondary intermediate phase obtained following proton-exchange of Na2Ti6O13 in HNO3 solution. Finally, the TiO2(B) phase was the product of calcination of the secondary intermediate product at 400°C for 5 hr. A phase transformation mechanism is presented based on an investigation of products at each of the steps. The effects of the synthesis conditions on tailoring of the crystal morphology are discussed. The growth direction of the TiO2(B) nanorods was investigated by HR-TEM and SADP. Finally, the metastable phase of TiO2(B) was shown to be transformed to anatase during thermal treatment at temperatures higher than 400°C.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Hydrothermal Synthesis, One-Dimensional Morphology, Phase Transformation Mechanism, Preferred Growth Direction, SEM, TEM, TiO2(B) |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/M028143/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Jan 2019 15:23 |
Last Modified: | 18 Jan 2019 15:23 |
Status: | Published |
Publisher: | Trans Tech Publications |
Identification Number: | 10.4028/www.scientific.net/SSP.283.23 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:141190 |