Improving the capability of UiO-66 for Cr(vi) adsorption from aqueous solutions by introducing isonicotinate N-oxide as the functional group

Considering the widespread production of Cr(vi) from various industrial processes and its damaging toxicity as a carcinogenic agent, it is imperative to investigate stable and efficient adsorbents with a rapid performance towards Cr(vi) adsorption. Zirconium-containing metal-organic frameworks (Zr-M...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2018-10, Vol.47 (41), p.14549-14555
Main Authors: Shokouhfar, Nasrin, Aboutorabi, Leila, Morsali, Ali
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Carcinogens
Chromium
Contaminants
Functional groups
Infrared spectroscopy
Kinetics
Metal-organic frameworks
Reduction (metal working)
Synthesis
Toxicity
X ray photoelectron spectroscopy
Zirconium
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Summary:Considering the widespread production of Cr(vi) from various industrial processes and its damaging toxicity as a carcinogenic agent, it is imperative to investigate stable and efficient adsorbents with a rapid performance towards Cr(vi) adsorption. Zirconium-containing metal-organic frameworks (Zr-MOFs) have been recently used as environmentally friendly adsorbents for the reduction of metallic contaminants in aqueous media. Preparation from nontoxic metal sources, remarkable stabilities and distinguished physicochemical features, such as the high tendency of Zr-clusters to adsorb oxo-anions, beneficial structural defects, and modification of their properties via modulator synthesis, can be enumerated as the advantages of Zr-MOFs. In this study, we improved the adsorption capacity of UiO-66 as the most stable Zr-MOF for Cr(vi) adsorption from aqueous solutions through the gradual addition of an N-O functional group. This strategy ultimately led us to afford a new Zr-MOF structure (TMU-66) with a maximum Cr(vi) adsorption capacity of 60.241 mg g-1, which is 4 times the absorption capacity of UiO-66, and very fast kinetics (
ISSN:1477-9226
1477-9234
DOI:10.1039/c8dt03196g