Thermal Behavior of Layered Double Hydroxide Zn-Al-Pyrovanadate: Composition, Structure Transformations, and Recovering Ability
authors Salak, AN; Tedim, J; Kuznetsova, AI; Vieira, LG; Ribeiro, JL; Zheludkevich, ML; Ferreira, MGS
nationality International
journal JOURNAL OF PHYSICAL CHEMISTRY C
keywords X-RAY-DIFFRACTION; ANION-EXCHANGE; CORROSION; VANADATE
abstract Layered double hydroxides (LDHs) intercalated with vanadate anions have been recently discovered as promising active anticorrosive pigments. Estimation of true chemical composition and refinement of crystal structure of such LDHs are not straightforward because of a variety of the vanadate anion polytypes and their adsorption on the external surface of the hydroxide layers. By means of combination of methods of chemical analysis and application of X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis, the chemical composition of Zn-Al-vanadate, polytype of the intercalated anion, and relative content of adsorbed species were found. Two structural modifications of the Zn-Al-vanadate LDH corresponding to different arrangements of the pyrovanadate anions were detected in the range between room temperature and 100 degrees C. Transition between the modifications is reversible and dependent on the relative content of the crystal water in the interlayer. Calcination at 150 degrees C and above leads to the irreversible degradation of the LDH phase and formation of ZnAl2O4 (above 300 degrees C) and Zn-3(VO4) (above 500 degrees C).
publisher AMER CHEMICAL SOC
issn 1932-7447
year published 2013
volume 117
issue 8
beginning page 4152
ending page 4157
digital object identifier (doi) 10.1021/jp312512y
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000318211800053
  ciceco authors
  impact metrics
times cited (wos core): 11
journal impact factor (jcr 2016): 4.536
5 year journal impact factor (jcr 2016): 4.796
category normalized journal impact factor percentile (jcr 2016): 78.450
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