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  Mechanochemical stability of hydrogen titanate nanostructures

Plodinec, M., Friščić, I., Iveković, D., Tomašić, N., Su, D. S., Zhang, J., et al. (2010). Mechanochemical stability of hydrogen titanate nanostructures. Journal of Alloys and Compounds, 499(1), 113-120. doi:10.1016/j.jallcom.2010.03.134.

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 Creators:
Plodinec, Milivoj, Author
Friščić, Ivica, Author
Iveković, Damir, Author
Tomašić, Nenad, Author
Su, Dang Sheng1, Author           
Zhang, Jian, Author
Gajovic, Andreja, Author
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: titanates; nanotubes; ball milling; structural phase transitions Catalysts in HRTEM
 Abstract: Structural stability of nanostructured titanates was investigated for further processing and possible applications. With the aim to investigate their mechanochemical stability we applied highenergy ball milling and studied induced phase transitions. Hydrogen titanates having two different morfologies, microcrystals and nanotubes, were taken into consideration. During mechanochemical treatment of both morphologies, we observed the phase transition from hydrogen titanate to TiO2 anatase and then to TiO2 rutile. Anatase to rutile phase transition occurred without appearance of intermediate high pressure TiO2 II typically observed in the case of mechanochemical treatment of TiO2. In the case of microcrystals, phase transition from hydrogen titanate to anatase starts after longer milling time than in the case of nanotubes, which is explained by larger particles sizes of crystalline powder. On the contrary, further phase transition from anatase to rutile was occurred faster in crystalline powder than in the case of nanotubes. The sequence of phase transitions was studied by Raman spectroscopy and X-ray powder diffraction, while morphology and crystal structure at nanoscale were analyzed by high resolution electron microscopy.

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Language(s): eng - English
 Dates: 2010-06
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 439436
DOI: 10.1016/j.jallcom.2010.03.134
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Title: Journal of Alloys and Compounds
Source Genre: Journal
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Pages: - Volume / Issue: 499 (1) Sequence Number: - Start / End Page: 113 - 120 Identifier: -