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Rapid Exfoliation and Surface Tailoring of Perovskite Nanosheets via Microwave‐Assisted Reactions
Author(s) -
AkbarianTefaghi Sara,
Rostamzadeh Taha,
Brown Treva T.,
DavisWheeler Clare,
Wiley John B.
Publication year - 2017
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201700124
Subject(s) - exfoliation joint , alkyl , materials science , perovskite (structure) , oxide , surface modification , amine gas treating , alkoxy group , chemical engineering , inorganic chemistry , polymer chemistry , organic chemistry , chemistry , nanotechnology , graphene , engineering , metallurgy
A facile method for the exfoliation of layered oxide perovskites as well as surface modification of generated oxide nanosheets has been developed. Using rapid microwave‐assisted reactions, nanosheets from Dion‐Jacobson‐type perovskites were obtained and then subsequently functionalized with a variety of organics containing hydroxyl or amine groups. Initially, oxide nanosheets with tetra( n ‐butyl)ammonium (TBA + ) surface groups are produced in as little as 1 h from bulk HLnNb 2 O 7 (Ln=La, Pr) perovskites. The TBA + surface groups of these nanosheets can then be replaced with a variety of n‐alkyl alkoxy and n‐alkylammonium groups via fast microwave reactions (≤1 h). Beyond these simple n‐alkyl surface groups, nanosheets can also be produced with both saturated and unsaturated cyclic and linear alcohols. This synthetic approach appears widely applicable such that any saturated/unsaturated organic with hydroxyl or amine functional groups can be attached to oxide nanosheets. The rapid production of organic‐inorganic nanosheets coupled with controlled surface modification is of great significance for engineering functional composite materials with novel properties.