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Phase and Morphology Transformation from Assembled Hexagonal HTiOF3 Prisms to {001} Faceted TiO2 Nanosheets

Abstract

A three-stage synthesis method was developed for the preparation of TiO2 nanosheets with the exposed {001} facet by a solvothermal process. The formation mechanism of TiO2 nanosheets was investigated by the variation of the solvothermal temperature and reaction time. In the three-stage synthesis process, assembled hexagonal HTiOF3 prisms were produced in the first stage produces, and then the hexagonal HTiOF3 prisms transform gradually into cubic TiOF2 in the second stage. Anatase TiO2 nanosheets with exposed {001} faceted are formed from cubic TiOF2 after the third stage. The results reveal that reaction time and temperature play important roles to control the transformation of morphology and phase from assembled hexagonal prisms HTiOF3 into TiO2 nanosheets through cubic TiOF2. In addition, compared with hexagonal prisms TiO2 and cubic TiO2 calcined from HTiOF3 and TiOF2, TiO2 nanosheets synthesized by the three-stage solvothermal strategy exhibited better photocatalytic performance. The finding of this work presents a distinctive formation mechanism of TiO2 via intermediates of HTiOF3 and TiOF2 to obtain the TiO2 nanosheets with controllable morphologies and excellent properties.

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Publication details

The article was received on 25 May 2018, accepted on 04 Jul 2018 and first published on 05 Jul 2018


Article type: Paper
DOI: 10.1039/C8CE00870A
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Phase and Morphology Transformation from Assembled Hexagonal HTiOF3 Prisms to {001} Faceted TiO2 Nanosheets

    Y. Zheng, X. Hu and P. Yang, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00870A

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