Spying on Fe ions and their role in modified aluminosilicates during the sorption of anions using solid-state NMR spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00469645" target="_blank" >RIV/61389013:_____/17:00469645 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/17:43913932
Result on the web
<a href="http://dx.doi.org/10.1016/j.micromeso.2016.12.030" target="_blank" >http://dx.doi.org/10.1016/j.micromeso.2016.12.030</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.micromeso.2016.12.030" target="_blank" >10.1016/j.micromeso.2016.12.030</a>
Alternative languages
Result language
angličtina
Original language name
Spying on Fe ions and their role in modified aluminosilicates during the sorption of anions using solid-state NMR spectroscopy
Original language description
Post-synthetic modifications of zeolites enable their possible use as adsorbents in separation and purification processes. Here, we present a multinuclear (29Si, 27Al, 31P) magnetic resonance study of solid samples of zeolite A (LTA) and hydroxysodalite (HS), their post-synthetic modification using FeSO4 solution, and the results of their analysis by NMR after the anion (PO43-) adsorption process. High-resolution 29Si and 27Al MAS NMR spectra provide valuable structural information on the oxidation of Fe2+ ions to Fe3+ species during the modification process, whereas 27Al 3Q/MAS solid-state NMR spectra of LTA and HS unveil a simultaneous dealumination process characteristic of acid leaching in aluminosilicate systems. 31P solid-state NMR spectra of LTA and HS, collected at “very-fast” spinning speed, revealed a dramatic change in the chemical shift values for the phosphates present, directly characteristic of FePO4 in the case of LTA, and phosphates of alkali and/or alkaline earth metals in the case of HS. Moreover, density functional theoretical (DFT) computations provide satisfactory agreement with the obtained 27Al and 29Si experimental data. This work demonstrates possible NMR approaches to the characterization of complex framework materials and provides key insights into aluminosilicate materials affected by unpaired electron(s).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Microporous and Mesoporous Materials
ISSN
1387-1811
e-ISSN
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Volume of the periodical
241
Issue of the periodical within the volume
15 March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
115-122
UT code for WoS article
000395842200015
EID of the result in the Scopus database
2-s2.0-85009499845