Insight into morphology and structure of different particle sized kaolinites with same origin

Zhang, Yude, Liu, Qinfu, Xiang, Jingjing, Zhang, Shilong, & Frost, Ray L. (2014) Insight into morphology and structure of different particle sized kaolinites with same origin. Journal of Colloid and Interface Science, 426, pp. 99-106.

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The particle size, morphology, crystallinity order and structural defects of four kaolinite samples are characterized by the techniques including particle size analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR). The particle size of four kaolinite samples gradually increases. Four samples all belong to the ordered kaolinite and show a decrease in structural order with the increase of kaolinite particle size. The changes of structural defect are proved by the increase of the band splitting in Raman spectroscopy, the decrease of the intensity of absorption bands in infrared spectroscopy, and the decrease of equivalent silicon atom and the increase of nonequivalent aluminum atom in MAS NMR spectroscopy. The differences in morphology and structural defect are attributed to the broken bonds of Al–O–Si, Al–O–Al and Si–O–Si and the Al substitution for Si in tetrahedral sheets.

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5 citations in Web of Science®

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ID Code: 72860
Item Type: Journal Article
Refereed: Yes
Keywords: Kaolinite, Morphology, Structural defect, Ordered degree, Spectrum
DOI: 10.1016/j.jcis.2014.03.057
ISSN: 0021-9797
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Elsevier Inc
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Colloid and Interface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Colloid and Interface Science, [VOL 426 (2014)] DOI: 10.1016/j.jcis.2014.03.057
Deposited On: 23 Jun 2014 22:24
Last Modified: 08 Aug 2016 21:58

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