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Sepiocite, sepiolite-like nanoclay derived from hydrotalcite-like layered double hydroxide

Title
Sepiocite, sepiolite-like nanoclay derived from hydrotalcite-like layered double hydroxide
Authors
Park D.-H.Jang M.W.Shul Y.-G.Choy J.-H.
Ewha Authors
최진호
SCOPUS Author ID
최진호scopus
Issue Date
2011
Journal Title
Journal of Nanoscience and Nanotechnology
ISSN
1533-4880JCR Link
Citation
vol. 11, no. 1, pp. 382 - 385
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Sepiocite, a synthetic sepiolite-like nanoclay, was derived from hydrotalcite-like Mg 2Al(CO 3) 0.5-layered double hydroxide (LDH) under phase transformation at 270±3 °C. The crystal structure of sepiocite is conceptually very similar to that of sepiolite derived from montmorillonite clay because sepiocite is formed through the alternation of the blocks and tunnels along the crystallographic c-axis, with a partial dehydroxylation of the octahedral Mg-(OH)-Al configuration into tetrahedral ones. Three important findings regarding sepiocite were arrived at: (i) its high specific surface area of 128.25 m 2/g with an average particle size of 200 nm, which is ≈3.5 times larger than the specific surface area of the pristine LDH (34.21 m 2/g); (ii) its non-swelling property; and (iii) its strongly reduced anion-exchange capacity. Copyright© 2011 American Scientific Publishers All rights reserved.
DOI
10.1166/jnn.2011.3239
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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