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Surface ‐Area Enhanced Dealuminated Layered Double Hydroxides for Adsorption of Organic Compounds
Author(s) -
Prakruthi R.,
Chandrashekara M.,
Prakash S. Jai,
Bhat Yajnavalkya S.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201602027
Subject(s) - adsorption , bet theory , mesoporous material , chemistry , inorganic chemistry , specific surface area , layered double hydroxides , nuclear chemistry , organic chemistry , catalysis
Removal of isomorphously substituted Al from the layer of Zn−Al LDHs by treating with organic acids like para‐toluenesulfonic acid, phenoldisulfonic acid followed by Ammonium hexafluro silicate under microwave irradiation result in increased surface area, generating materials which are highly mesoporous. The dealuminated Zn−Al LDHs were characterized by BET surface area, XRDand 27 Al– NMR. Adsorption data of as‐synthesized and dealuminated Zn−Al LDHs for various polar and nonpolar organic compounds at different time intervals were evaluated. Adsorption data were fitted with the models such as fractional power, pseudo‐first order and Elovich models. The Elovich model provided high degree of correlation. Modified Zn‐Al LDH adsorbent showed increased adsorption of organic compounds compared to as‐synthesized Zn−Al LDH because of high surface area. Reusability of used adsorbent showed almost same adsorption capacity as the fresh adsorbent.