Anion exchange in Zn-Al layered double hydroxides: In situ X-ray diffraction study
authors Salak, AN; Tedim, J; Kuznetsova, AI; Zheludkevich, ML; Ferreira, MGS
nationality International
abstract Anion exchange capacity is a key factor for the application of Zn-Al layered double hydroxides (LDHs) as nano-containers in active corrosion protection. In this work, the nitrate-pyrovanadate anion exchange/re-exchange processes in these LDHs were investigated in situ. We demonstrate that the exchange reactions lead to a decrease of the average crystallite size of LDHs as a result of mechanical fragmentation of the crystallites rather than dissolution/recrystallization. The fragmentation occurs due to fast anion exchange in the initial stage, and can be controlled by changing the ratio of the available substituent anions to the replacement anions and application of a mechanical activation. (C) 2010 Elsevier B.V. All rights reserved.
issn 0009-2614
year published 2010
volume 495
issue 1-3
beginning page 73
ending page 76
digital object identifier (doi) 10.1016/j.cplett.2010.06.041
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000280116000015
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