Shamim, Mostofa and Dana, Kausik (2019) Intercalation of LDH NO3 with short-chain intercalants. Bulletin of Materials Science, 42 (1). Art No-UNSP 25. ISSN 0250-4707

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Intercalation behaviour of layered-double hydroxide (LDH) with short-chain intercalants (-(CH2)n-,n<9) is significantly difficult and less reported than with long-chain intercalants. The present study reports an efficient way to intercalate LDH with short-chain intercalants (n=4 and 8) and investigates the effect of layer charge on intercalation behaviour of LDHs. Short-chain anionic surfactants were successfully intercalated with synthetic LDHs Zn1-xAlx(OH)2NO3<bold>nH</bold>2O,] by an ion-exchange intercalation technique in a slightly acidic medium (pH=5.4). The adverse effect of a carbonate anion was avoided by performing the ion-exchange intercalation in slightly acidic medium (pH=5.4). It was found that basal spacing (d003) and experimental organic loading of intercalated LDH (O-LDH) increase monotonically with increasing anion-exchange capacity of LDH and intercalant chain length. The evolution of intercalated LDH (O-LDH) structures with increasing intercalant chain length and layered charge has been deciphered by correlating basal spacing of O-LDHs (by X-ray powder diffraction), organic loading data (by thermogravimetric analysis) and molecular conformation of O-LDHs (by Fourier-transform infrared spectroscopy) within the LDH gallery. Successful intercalation of LDH with these short-chain intercalants in slightly acidic medium has not been reported previously.

Item Type: Article
Subjects: Refractories
Divisions: Refractory
Depositing User: Bidhan Chaudhuri
Date Deposited: 20 Nov 2019 07:04
Last Modified: 20 Nov 2019 07:04

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