Anion release and uptake kinetics: structural changes of layered 2-dimensional ZnNiHN upon uptake of acetate and chlorinated acetate anions. J Colloid Interface Sci 2013 Dec 01;411:129-37
Date
09/24/2013Pubmed ID
24054447DOI
10.1016/j.jcis.2013.08.037Scopus ID
2-s2.0-84885079074 (requires institutional sign-in at Scopus site) 5 CitationsAbstract
X-ray diffraction and UV-vis spectroscopy were used for the investigation of ion exchange reaction kinetics of nitrates with acetate (Ac), chloro acetate (ClAc), dichloro acetate (dClAc) and trichloro acetate (tClAc) anions, using zinc nickel hydroxy nitrate (ZnNiHN) as the exchange precursor. The exchange reactions conducted at 24, 30, 40 and 50°C revealed that rate constants were inversely related to the calculated anion electronic spatial extent (ESE), while a direct relationship between rate constants and the average oxygen charges was observed. Temporal solid phase structural transformations were shown to be affected by the nature of the guest anions. The amount of nitrates released into solution has been shown to decrease as the guest anions became more chlorinated. Use of isoconversional approach revealed that activation energies changed significantly with α during dClAc intercalation than for the other anions. The topotactic intercalation of the guest anions, except dClAc, followed the Avrami-Erofe'ev kinetic model for the entire reaction progress.
Author List
Machingauta C, Hossenlopp JMAuthor
Jeanne M. Hossenlopp in the Chemistry department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
AcetatesAnions
Chlorine
Kinetics
Molecular Structure
Powder Diffraction
Spectroscopy, Fourier Transform Infrared
Zinc Compounds
