One-pot synthesis of oxygen-vacancy-rich Cu-doped UiO-66 for collaborative adsorption and photocatalytic degradation of ciprofloxacin.

Yin, L; Wang, D; Li, X; He, Y; Liu, X; Xu, Y; Chen, H

One-pot synthesis of oxygen-vacancy-rich Cu-doped UiO-66 for collaborative adsorption and photocatalytic degradation of ciprofloxacin.

Yin, L Wang, D Li, X He, Y Liu, X Xu, Y Chen, H

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Sci Total Environ, 2022, 815, pp. 151962
Issue Date:: 2022-04-01

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Field	Value	Language
dc.contributor.author	Yin, L
dc.contributor.author	Wang, D
dc.contributor.author	Li, X
dc.contributor.author	He, Y
dc.contributor.author	Liu, X
dc.contributor.author	Xu, Y
dc.contributor.author	Chen, H
dc.date.accessioned	2023-07-03T05:00:59Z
dc.date.available	2021-11-21
dc.date.available	2023-07-03T05:00:59Z
dc.date.issued	2022-04-01
dc.identifier.citation	Sci Total Environ, 2022, 815, pp. 151962
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/171142
dc.description.abstract	UiO-66, as one of the most stable metal-organic frameworks (MOFs), has attracted a lot of attention in the field of adsorption and photocatalysis. However, this application of UiO-66 is still limited due to either the low accessibility of micropores or the poor electron-hole charge separation capability. This study aims to promote UiO-66 accessibility of micropores and charge separation through the construction of oxygen vacancies (OVs) and mesopore defects as well as copper incorporation. Herein, mesopore Cu doped UiO-66 with rich OVs was synthesized by a one-pot method and demonstrated high efficiency for the removal of ciprofloxacin (CIP) from the aquatic system. First of all, denatured mesopore defects were produced in Cu doped UiO-66 which possessed a 58% increase in specific surface area compared to UiO-66, facilitating the adsorption of molecular oxygen. Secondly, e- was preferentially trapped by OVs under light irradiation. Electron (e-) reacted rapidly with the surface adsorbed oxygen to generate superoxide radical (O2-). Meanwhile, copper incorporation increased the photocurrent and reduced the interfacial charge transfer resistance, thereby improving the charge separation efficiency. As a result, the adsorption efficiency and photocatalytic performance of mesopore Cu doped UiO-66 with OVs were 8.1 and 3.7 times higher than those of UiO-66, respectively. This study paved a way for the one-step synthesis of MOFs containing OVs and broadened the possibilities of practical applications for photo-induced removal of antibiotics from effluent.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Sci Total Environ
dc.relation.isbasedon	10.1016/j.scitotenv.2021.151962
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Adsorption
dc.subject.mesh	Catalysis
dc.subject.mesh	Ciprofloxacin
dc.subject.mesh	Metal-Organic Frameworks
dc.subject.mesh	Oxygen
dc.subject.mesh	Phthalic Acids
dc.subject.mesh	Oxygen
dc.subject.mesh	Phthalic Acids
dc.subject.mesh	Ciprofloxacin
dc.subject.mesh	Catalysis
dc.subject.mesh	Adsorption
dc.subject.mesh	Metal-Organic Frameworks
dc.subject.mesh	Adsorption
dc.subject.mesh	Catalysis
dc.subject.mesh	Ciprofloxacin
dc.subject.mesh	Metal-Organic Frameworks
dc.subject.mesh	Oxygen
dc.subject.mesh	Phthalic Acids
dc.title	One-pot synthesis of oxygen-vacancy-rich Cu-doped UiO-66 for collaborative adsorption and photocatalytic degradation of ciprofloxacin.
dc.type	Journal Article
utslib.citation.volume	815
utslib.location.activity	Netherlands
utslib.copyright.status	closed_access	*
dc.date.updated	2023-07-03T05:00:56Z
pubs.publication-status	Published
pubs.volume	815

Abstract:

UiO-66, as one of the most stable metal-organic frameworks (MOFs), has attracted a lot of attention in the field of adsorption and photocatalysis. However, this application of UiO-66 is still limited due to either the low accessibility of micropores or the poor electron-hole charge separation capability. This study aims to promote UiO-66 accessibility of micropores and charge separation through the construction of oxygen vacancies (OVs) and mesopore defects as well as copper incorporation. Herein, mesopore Cu doped UiO-66 with rich OVs was synthesized by a one-pot method and demonstrated high efficiency for the removal of ciprofloxacin (CIP) from the aquatic system. First of all, denatured mesopore defects were produced in Cu doped UiO-66 which possessed a 58% increase in specific surface area compared to UiO-66, facilitating the adsorption of molecular oxygen. Secondly, e- was preferentially trapped by OVs under light irradiation. Electron (e-) reacted rapidly with the surface adsorbed oxygen to generate superoxide radical (O2-). Meanwhile, copper incorporation increased the photocurrent and reduced the interfacial charge transfer resistance, thereby improving the charge separation efficiency. As a result, the adsorption efficiency and photocatalytic performance of mesopore Cu doped UiO-66 with OVs were 8.1 and 3.7 times higher than those of UiO-66, respectively. This study paved a way for the one-step synthesis of MOFs containing OVs and broadened the possibilities of practical applications for photo-induced removal of antibiotics from effluent.

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