Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 386, Issue -, Pages 107-113Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2012.07.046
Keywords
Organic-inorganic hybrid; Layered compound; Exfoliation; Hydrothermal synthesis; Nanosheet
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Funding
- Japan Society for the Promotion of Science [23350101]
- National Natural Science Foundation of China [20871053]
- Grants-in-Aid for Scientific Research [23350101] Funding Source: KAKEN
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This paper introduces two hydrothermally synthesized layered hydroxide nickel benzoates with the layered basic metal salt structures of basal spacings of 1.71 and 1.48 nm and their exfoliation reactions. These inorganic-organic hybrid layered compounds were characterized with XRD, FTIR, TG-DTA, SEM, SAED, and TEM. The 1.71 nm layered phase is a low temperature stable phase and has lattice parameters of a = 0.7017(1) nm, b = 0.3495(0) nm, c = 1.763(7) nm, alpha = gamma = 90 degrees, and beta = 101.6(6)degrees. The 1.48 nm layered phase is a high temperature stable phase and has lattice parameters of a = 0.6277(2) nm, b = 0.3678(2) nm, c = 1.514(1) nm, alpha = gamma = 90 degrees, and beta = 97.35(0)degrees. The benzoate anions in the interlayer space are coordinated to Ni(II) with unidentate and bidentate binding modes in the 1.71 nm layered phase, and with only bidentate binding mode in the 1.48 nm layered phase. These hybrid layered phases were exfoliated into their nanosheets in organic solvents, which gave a new category of inorganic-organic hybrid nanosheets. The exfoliation reactions are dependent on the structures and chemical compositions of the hybrid layered phases, as well as the molecule structures of the organic solvents used in the exfoliation. (c) 2012 Elsevier Inc. All rights reserved.
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