New insights into polymer mediated formation of anatase mesocrystals
Authors:
- Olga V. BoytsovaOlga V. Boytsova
- Alexey A. SadovnikovAlexey A. Sadovnikov
- Khursand E. YorovKhursand E. Yorov
- Artemii N. BeltiukovArtemii N. Beltiukov
- Alexander E. BaranchikovAlexander E. Baranchikov
- Vladimir K. IvanovVladimir K. Ivanov
- Xiangli ZhongXiangli Zhong
- David J. LewisDavid J. Lewis
- Paul O'BrienPaul O'Brien
- Andrew J. SutherlandAndrew J. Sutherland
Open Access
- 23 May 2017
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in CrystEngComm
- Vol. 19 (24) , 3281-3287
Abstract
The reaction between (NH4)2TiF6 and H3BO3 in the presence of varying quantities of PEG-6000 was used to form NH4TiOF3 mesocrystals (MCs). The amount of PEG-6000, employed as a template, is crucial to the formation of defect free, non-agglomerated NH4TiOF3 MCs; high concentrations lead to MC agglomeration, lower ones result in centralized defects. This polymer-mediated formation process may be understood using an analogy with known polymerization reactions. The oxofluorotitanate MCs readily undergo a thermal topotactic transformation to give anatase MCs with photocatalytic activity. The TiO2 MCs are porous, with highly orientated lamellar crystallites that form part of the larger mesocrystal structure.Keywords
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