Ng Tat Lun, Darren
(2015)
Synthesis And Characterisation Of Colloidal Alpo-S Nanocrystals Templated By L-Ethyl-2,3- Dimetiiylimidazolium Hydroxide.
Masters thesis, Perpustakaan Hamzah Sendut.
Abstract
Colloidal stable nanosized AIPO-S crystals were synthesised via
hydrothermal method using a new template, l-ethyl-2,3-dimethylimidazolium
hydroxide, [edmim]OH. The syntheses were carried out under various synthesis
conditions such as heating time, heating temperature and molar composition of
precursor gels to investigate the effects of the conditions on the crystallisation of
AIPO-S. The new template, [edmim]OH, had produced colloidally stable AIPO-S
nanocrystals with the size in the range of SO-800 nm with low agglomeration and
defined shape. Additionally, this study also applied a facile and fast synthesis method
whereby the precursor gels were heated with microwave radiation rather than the
conventional heating in an oven. This synthesis method allowed AIPO-S nanocrystals
to be obtained within several minutes compared to the conventional hydrothermal
heating which required several hours for complete crystallisation. Interestingly, the
nanocrystals obtained via microwave heating were of smaller sizes due to fast
nucleation. The AIPO-S nanocrystals obtained in this study exhibited hexagonal
frustum feature with low agglomeration.
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