New insights into polymer mediated formation of anatase mesocrystals

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 agglomer...

Full description

Saved in:
Bibliographic Details
Published in:CrystEngComm 2017, Vol.19 (24), p.3281-3287
Main Authors: Boytsova, Olga V., Sadovnikov, Alexey A., Yorov, Khursand E., Beltiukov, Artemii N., Baranchikov, Alexander E., Ivanov, Vladimir K., Zhong, Xiangli, Lewis, David J., O'Brien, Paul, Sutherland, Andrew J.
Format: Article
Language:English
Subjects:
Agglomeration
Anatase
Crystal defects
Crystallites
Formations
Lamellar structure
Titanium dioxide
Transformations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1466-8033
1466-8033
DOI:10.1039/C6CE01985D