Issue 44, 2015

A novel quasi-cubic CuFe2O4–Fe2O3 catalyst prepared at low temperature for enhanced oxidation of bisphenol A via peroxymonosulfate activation

Abstract

A facile eco-friendly co-precipitation synthesis at low temperature was employed to fabricate CuFe2O4–Fe2O3 for the oxidation of bisphenol A (BPA) via peroxymonosulfate (PMS) activation. The formation mechanism of CuFe2O4–Fe2O3 at low temperature is proposed. The FESEM and BET characterization studies revealed that the CuFe2O4–Fe2O3 catalyst has a quasi-cubic morphology and specific surface area of 63 m2 g−1. The performance of CuFe2O4–Fe2O3 as a PMS activator was compared with those of other catalysts and the results indicated that the performance was in the following order: CuFe2O4–Fe2O3 > CuFe2O4 > CoFe2O4 > CuBi2O4 > CuAl2O4 > Fe2O3 > MnFe2O4. A kinetic model with mechanistic consideration of the influence of pH, PMS dosage and catalyst loading was developed to model the degradation of BPA. The intrinsic rate constant (ki) was obtained from the kinetic study. The relationship between the pseudo first-order rate constant and ki was established. The trend of ki revealed that increasing the catalyst loading decreased the BPA removal rate due to the initial preferential production of the weaker radical (i.e. SO5˙) for BPA degradation and Fe2+ quenching of SO4˙ at higher catalyst loading. The influence of water matrix species (i.e. Cl, NO3, HCO3, PO43− and humic acid) on the BPA degradation rate was also investigated. The CuFe2O4–Fe2O3 catalyst exhibited excellent stability and can be reused several times without significant deterioration in performance.

Graphical abstract: A novel quasi-cubic CuFe2O4–Fe2O3 catalyst prepared at low temperature for enhanced oxidation of bisphenol A via peroxymonosulfate activation

Supplementary files

Article information

Article type
Paper
Submitted
20 Aug 2015
Accepted
21 Sep 2015
First published
21 Sep 2015

J. Mater. Chem. A, 2015,3, 22208-22217

Author version available

A novel quasi-cubic CuFe2O4–Fe2O3 catalyst prepared at low temperature for enhanced oxidation of bisphenol A via peroxymonosulfate activation

W. Oh, Z. Dong, Z. Hu and T. Lim, J. Mater. Chem. A, 2015, 3, 22208 DOI: 10.1039/C5TA06563A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements