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Title: Atomic insights into nanoparticle formation of hydroxyfluorinated anatase featuring titanium vacancies

Abstract

Anatase TiO2 with exposed highly reactive (001) surface is commonly prepared using solution-based synthesis in the presence of a fluorinating agent acting as a structure directing agent. Here, the solvothermal reaction of titanium tetraisopropoxide in the presence of aqueous HF has resulted in the stabilization of an oxyhydroxyfluorinated anatase phase featuring cationic vacancies. In the present work, we have studied its formation mechanism, revealing a solid-state transformation of a highly defective anatase phase having a hydroxyfluoride composition that subsequently evolves through an oxolation reaction into an oxyhydroxyfluoride phase. Importantly, this work confirms that titanium alkoxide precursors can react with HF via a fluorolysis process yielding fluorinated molecular precursors, which further condense to produce new composition and structural features deviating from a well ordered anatase network.

Authors:
 [1];  [2];  [2];  [3];  [1]
  1. Sorbonnes Univ., Paris (France)
  2. Univ. Bretagne Loire, Univ. du Maine, Le Mans Cedex 9 (France)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
European Commission - Community Research and Development Information Service (CORDIS) - Seventh Framework Programme (FP7); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1339461
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 55; Journal Issue: 14; Journal ID: ISSN 0020-1669
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; crystals; detector; facets

Citation Formats

Li, Wei, Body, Monique, Legein, Christophe, Borkiewicz, Olaf J., and Dambournet, Damien. Atomic insights into nanoparticle formation of hydroxyfluorinated anatase featuring titanium vacancies. United States: N. p., 2016. Web. doi:10.1021/acs.inorgchem.6b01259.
Li, Wei, Body, Monique, Legein, Christophe, Borkiewicz, Olaf J., & Dambournet, Damien. Atomic insights into nanoparticle formation of hydroxyfluorinated anatase featuring titanium vacancies. United States. doi:10.1021/acs.inorgchem.6b01259.
Li, Wei, Body, Monique, Legein, Christophe, Borkiewicz, Olaf J., and Dambournet, Damien. Tue . "Atomic insights into nanoparticle formation of hydroxyfluorinated anatase featuring titanium vacancies". United States. doi:10.1021/acs.inorgchem.6b01259. https://www.osti.gov/servlets/purl/1339461.
@article{osti_1339461,
title = {Atomic insights into nanoparticle formation of hydroxyfluorinated anatase featuring titanium vacancies},
author = {Li, Wei and Body, Monique and Legein, Christophe and Borkiewicz, Olaf J. and Dambournet, Damien},
abstractNote = {Anatase TiO2 with exposed highly reactive (001) surface is commonly prepared using solution-based synthesis in the presence of a fluorinating agent acting as a structure directing agent. Here, the solvothermal reaction of titanium tetraisopropoxide in the presence of aqueous HF has resulted in the stabilization of an oxyhydroxyfluorinated anatase phase featuring cationic vacancies. In the present work, we have studied its formation mechanism, revealing a solid-state transformation of a highly defective anatase phase having a hydroxyfluoride composition that subsequently evolves through an oxolation reaction into an oxyhydroxyfluoride phase. Importantly, this work confirms that titanium alkoxide precursors can react with HF via a fluorolysis process yielding fluorinated molecular precursors, which further condense to produce new composition and structural features deviating from a well ordered anatase network.},
doi = {10.1021/acs.inorgchem.6b01259},
journal = {Inorganic Chemistry},
number = 14,
volume = 55,
place = {United States},
year = {2016},
month = {6}
}

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Works referencing / citing this record:

Reversible magnesium and aluminium ions insertion in cation-deficient anatase TiO2
journal, September 2017

  • Koketsu, Toshinari; Ma, Jiwei; Morgan, Benjamin J.
  • Nature Materials, Vol. 16, Issue 11
  • DOI: 10.1038/nmat4976

Controlled hydroxy-fluorination reaction of anatase to promote Mg 2+ mobility in rechargeable magnesium batteries
journal, January 2018

  • Ma, Jiwei; Koketsu, Toshinari; Morgan, Benjamin. J.
  • Chemical Communications, Vol. 54, Issue 72
  • DOI: 10.1039/c8cc04136a

Reversible magnesium and aluminium ions insertion in cation-deficient anatase TiO2
journal, September 2017

  • Koketsu, Toshinari; Ma, Jiwei; Morgan, Benjamin J.
  • Nature Materials, Vol. 16, Issue 11
  • DOI: 10.1038/nmat4976

Controlled hydroxy-fluorination reaction of anatase to promote Mg 2+ mobility in rechargeable magnesium batteries
journal, January 2018

  • Ma, Jiwei; Koketsu, Toshinari; Morgan, Benjamin. J.
  • Chemical Communications, Vol. 54, Issue 72
  • DOI: 10.1039/c8cc04136a