Properties of Cobalt- and Nickel-Doped Zif-8 Framework Materials and Their Application in Heavy-Metal Removal from Wastewater

Heterometallic zeolite imidazole framework materials (ZIF) exhibit highly attractive properties and have drawn increased attention. In this study, a petal-like zinc based ZIF-8 crystal and materials doped with cobalt and nickel ions were efficiently prepared in an aqueous solution at room temperatur...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Vol. 10; no. 9; p. 1636
Main Authors: Shen, Bowen, Wang, Bixuan, Zhu, Liying, Jiang, Ling
Format: Journal Article
Language:English
Published: Basel MDPI AG 20.08.2020
MDPI
Subjects:
Adsorption
Aqueous solutions
Catalysis
Cobalt
Copper
doped materials
Enzymes
Heavy metals
heavy-metal removal
Imidazole
Metal ions
Morphology
Nickel
Nitrates
Nitrogen
petal-like structure
Petals
Photocatalysis
Room temperature
Scanning electron microscopy
Spectrum analysis
Wastewater
Wastewater treatment
zeolite imidazole framework-8
Zeolites
Zinc
United States > US
China
ISSN:2079-4991, 2079-4991
Online Access:Get full text
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Summary:Heterometallic zeolite imidazole framework materials (ZIF) exhibit highly attractive properties and have drawn increased attention. In this study, a petal-like zinc based ZIF-8 crystal and materials doped with cobalt and nickel ions were efficiently prepared in an aqueous solution at room temperature. It was observed that doped cobalt and nickel had obviously different effects on the morphology of ZIF-8. Cobalt ions were beneficial for the formation of ZIF-8, while addition of nickel ions tended to destroy the original configuration. Then we compared the absorption ability for metal ions between petal-like ZIF-8 and its doped derivatives with anion dichromate ions (Cr2O72−) and cation copper ions (Cu2+) as the absorbates. Results indicated that saturated adsorption capacities of Co@ZIF-8 and Ni@ZIF-8 for Cr2O72− reach 43.00 and 51.60 mg/g, while they are 1191.67 and 1066.67 mg/g for Cu2+, respectively, which are much higher than the original ZIF-8 materials. Furthermore, both the heterometallic ZIF-8 materials show fast adsorption kinetics to reach adsorption equilibrium. Therefore, petal-like ZIF-8 with doped ions can be produced through a facile method and can be an excellent candidate for further applications in heavy-metal treatment.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano10091636