Zinc/Cobalt-Based Zeolite Imidazolate Frameworks for Simultaneously Degrading Dye and Inhibiting Bacteria

In this work, the zinc/cobalt-based zeolite imidazolate frameworks ((Co/Zn)ZIFs) were synthesized with the solvothermal method. The obtained material was characterized by utilizing scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis diffusive reflectance spectroscopy, and nitrogen ad...

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Published inJournal of nanomaterials Vol. 2022; no. 1
Main Authors Tu, Nguyen Thi Thanh, Khang, Lu Hoang, Thao, Nguyen Ngoc Phuong, Hien, Nguyen Thi Thu, Chau To, Thuy, Diep, Le Thi Hong, Son, Le Van Thanh, Lien, Phan, Nguyen, Vo Thang, Khieu, Dinh Quang
Format Journal Article
LanguageEnglish
Published New York Hindawi 2022
Hindawi Limited
Subjects
Adsorption
Antimicrobial agents
Aqueous solutions
Bacteria
Cobalt
Doppler effect
Dyes
E coli
Morphology
Nanocrystals
Nanoparticles
Nitrates
Organic compounds
Photocatalysis
Red shift
Rhodamine
Scanning electron microscopy
Spectrum analysis
X-ray diffraction
Zeolites
Zinc
China
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Summary:In this work, the zinc/cobalt-based zeolite imidazolate frameworks ((Co/Zn)ZIFs) were synthesized with the solvothermal method. The obtained material was characterized by utilizing scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis diffusive reflectance spectroscopy, and nitrogen adsorption-desorption isotherms. XRD and SEM analyses show that (Co/Zn)ZIFs are composed of nanocrystals with polyhedral shapes of around 50–100 nm and belong to the I-43m space group as those of ZIF-8 and ZIF-67. Optical studies demonstrate a red shift in the absorbance spectrum of (Co/Zn)ZIFs compared with individual components of ZIF-67 or ZIF-8. (Co/Zn)ZIF composite was utilized as photocatalytic material to treat a model aqueous solution containing rhodamine B and bacteria. It was found that (Co/Zn)ZIFs could simultaneously degrade rhodamine B and inhibit bacteria (E. coli and S. aureus). The manufactured composite could catalyze the mineralization of rhodamine B and also exhibited good antibacterial activity against Gram-negative E. coli (93.32% inhibition rate) and Gram-positive S. aureus (90.86% inhibition rate) in the visible-light region within four hours of irradiation. Gram-negative bacteria were more resistant to (Co/Zn)ZIFs than Gram-positive bacteria. (Co/Zn)ZIFs can be used as light-driven catalysts for water and environmental detoxification from organic compounds like dyes and bacteria.
ISSN:1687-4110
1687-4129
DOI:10.1155/2022/8630685