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Efficient Hybrid‐Type CO 2 Adsorbents of Reassembled Layered Double Hydroxide 2D Nanosheets with Polyoxometalate 0D Nanoclusters
Author(s) -
Gunjakar Jayavant L.,
Kim In Young,
Hwang SeongJu
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402480
Subject(s) - polyoxometalate , nanoclusters , nanosheet , chemistry , exfoliation joint , adsorption , intercalation (chemistry) , mesoporous material , hydroxide , cationic polymerization , layered double hydroxides , chemical engineering , self assembly , nanostructure , inorganic chemistry , nanotechnology , graphene , organic chemistry , materials science , catalysis , engineering
Porous nanohybrids of cationic Mg‐Al‐LDH 2D nanosheets and anionic polyoxometalate (POM, V 10 O 28 6– and W 7 O 24 6– ) 0D nanoclusters are synthesized by an exfoliation–reassembling process. The electrostatically derived reassembling between two kinds of nanostructures yields a layer‐by‐layer‐ordered intercalation structure with porous structures composed of mesopores and micropores. The hybridization with POM leads to the remarkable enhancement of CO 2 adsorption capacity (adsorptivity) of Mg‐Al‐LDH by about 10‐fold. Of prime importance is that the CO 2 adsorptivity of the nanohybrid is strongly dependent on the type of guest POM species, strongly suggesting that the CO 2 adsorptivity of the LDH‐based nanohybrid materials can be optimized by ones selection of guest species. The present study clearly demonstrates that the exfoliation–reassembling method is quite effective at enabling synthesis of new LDH nanosheet‐based hybrid materials with improved CO 2 adsorption capabilities.