View in EDS

Oxygen vacancy on hollow sphere CuFe2O4 as an efficient Fenton-like catalysis for organic pollutant degradation over a wide pH range.

Saved in:
Bibliographic Details
Title: Oxygen vacancy on hollow sphere CuFe2O4 as an efficient Fenton-like catalysis for organic pollutant degradation over a wide pH range.
Authors: Ding, Rong-Rong1 (AUTHOR), Li, Wen-Qiang1 (AUTHOR), He, Chuan-Shu1,2 (AUTHOR) hcs@mail.ustc.edu.cn, Wang, Yi-Ran1 (AUTHOR), Liu, Xiao-Cheng1 (AUTHOR), Zhou, Guan-Nan1 (AUTHOR), Mu, Yang1 (AUTHOR) yangmu@ustc.edu.cn
Source: Applied Catalysis B: Environment & Energy. Aug2021, Vol. 291, pN.PAG-N.PAG. 1p.
Subjects: Pollutants, Water purification, Catalysis, Recyclable material, Density functional theory
Abstract: [Display omitted] • Magnetic hollow sphere CuFe 2 O 4 with oxygen vacancies (HS-CuFe 2 O 4-σ) was designed for H 2 O 2 activation. • HS-CuFe 2 O 4-σ exhibited significantly higher activity for ciprofloxacin (CIP) degradation than CuFe 2 O 4. • HS-CuFe 2 O 4-σ maintained high catalytic activity in pH 6.5–9.0. • Oxygen vacancies (OVs) provided additional active sites. • Enhanced CIP removal mechanisms with HS-CuFe 2 O 4-σ was studied. Exploitation of highly active, stable and easily recyclable catalytic materials for heterogeneous Fenton-like processes has been enormously stimulated by the globally increased demands for water purification and guarantees of human health. Herein, a novel heterogeneous Fenton-like catalyst, hollow sphere CuFe 2 O 4 with oxygen vacancies (HS-CuFe 2 O 4-σ), was designed to efficiently activate H 2 O 2 with good stability over a wide pH range. Results showed that the pollutant ciprofloxacin (CIP) could be completely removed within 30 min at pH 6.5–9.0. Compared with CuFe 2 O 4 , the rate constant of CIP degradation in neutral pH was enhanced by 20 times. Sufficient experimental exploration and density functional theory (DFT) calculations clearly demonstrated that the efficient catalytic performance of HS-CuFe 2 O 4-σ was attributed to the synergistic effect of oxygen vacancies (OVs) and the nanoconfinement of the catalyst's special hollow structure. This study lays a foundation for the rational design of catalysts that apply heterogeneous Fenton reactions to practical water purification. [ABSTRACT FROM AUTHOR]
Copyright of Applied Catalysis B: Environment & Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:[Display omitted] • Magnetic hollow sphere CuFe 2 O 4 with oxygen vacancies (HS-CuFe 2 O 4-σ) was designed for H 2 O 2 activation. • HS-CuFe 2 O 4-σ exhibited significantly higher activity for ciprofloxacin (CIP) degradation than CuFe 2 O 4. • HS-CuFe 2 O 4-σ maintained high catalytic activity in pH 6.5–9.0. • Oxygen vacancies (OVs) provided additional active sites. • Enhanced CIP removal mechanisms with HS-CuFe 2 O 4-σ was studied. Exploitation of highly active, stable and easily recyclable catalytic materials for heterogeneous Fenton-like processes has been enormously stimulated by the globally increased demands for water purification and guarantees of human health. Herein, a novel heterogeneous Fenton-like catalyst, hollow sphere CuFe 2 O 4 with oxygen vacancies (HS-CuFe 2 O 4-σ), was designed to efficiently activate H 2 O 2 with good stability over a wide pH range. Results showed that the pollutant ciprofloxacin (CIP) could be completely removed within 30 min at pH 6.5–9.0. Compared with CuFe 2 O 4 , the rate constant of CIP degradation in neutral pH was enhanced by 20 times. Sufficient experimental exploration and density functional theory (DFT) calculations clearly demonstrated that the efficient catalytic performance of HS-CuFe 2 O 4-σ was attributed to the synergistic effect of oxygen vacancies (OVs) and the nanoconfinement of the catalyst's special hollow structure. This study lays a foundation for the rational design of catalysts that apply heterogeneous Fenton reactions to practical water purification. [ABSTRACT FROM AUTHOR]
ISSN:09263373
DOI:10.1016/j.apcatb.2021.120069