Intercalative ion-exchange route to amino acid layered double hydroxide nanohybrids and their sorption properties

Choi, Goeun, Yang, Jae-Hun, Park, Ga-Yong, Vinu, Ajayan, Elzatahry, Ahamd, Yo, Chul Hyun and Choy, Jin-Ho (2015) Intercalative ion-exchange route to amino acid layered double hydroxide nanohybrids and their sorption properties. European Journal of Inorganic Chemistry, 6: 925-930. doi:10.1002/ejic.201403115


Author Choi, Goeun
Yang, Jae-Hun
Park, Ga-Yong
Vinu, Ajayan
Elzatahry, Ahamd
Yo, Chul Hyun
Choy, Jin-Ho
Title Intercalative ion-exchange route to amino acid layered double hydroxide nanohybrids and their sorption properties
Journal name European Journal of Inorganic Chemistry   Check publisher's open access policy
ISSN 1099-0682
Publication date 2015-02
Year available 2015
Sub-type Article (original research)
DOI 10.1002/ejic.201403115
Open Access Status
Issue 6
Start page 925
End page 930
Total pages 6
Place of publication Wiley
Publisher Weinheim, Germany
Collection year 2016
Language eng
Formatted abstract
A soft chemical route to amino acid layered double hydroxide (LDH) nanohybrids was demonstrated on the basis of an intercalative ion-exchange reaction. Two different amino acids, phenylalanine and glutamic acid, were intercalated and stabilized in the interlayer space of a 2-dimensional double hydroxide lattice by electrostatic interaction. An attempt was also made to understand the effect of the intracrystalline structure of the amino acid in the LDH on the specific surface area, porosity, and gas sorption properties of the hybrid. According to the X-ray diffraction analysis, the basal spacings of LDH intercalated with phenylalanine and LDH intercalated with glutamic acid were expanded to 1.80 and 1.22 nm, respectively, relative to that of the pristine Mg2Al-NO3-LDH (0.88 nm), which indicates that amino acid molecules were successfully intercalated into the LDH. Fourier transform infrared spectra for both samples confirmed that the carboxylic acid group in the amino acid is anionic carboxylate under basic conditions and it eventually interacts with the positively charged LDH surface. From N2 adsorption/desorption analysis, the BET specific surface area of the LDH intercalated with phenylalanine was found to be twice as large as that for the LDH intercalated with glutamic acid. However, the CO2 adsorption capacity of the former was determined to be three times more enhanced than that of the latter, due to an enhanced specific surface area and effective amine sites to form carbamates.
Keyword Amino acids
Layered compounds
Intercalations
CO2 adsorption
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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