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Fabrication of black TiO2−x/CuFe2O4 decorated on diatomaceous earth with enhanced sonocatalytic activity for ibuprofen mitigation

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Abstract

This study reports facile fabrication of black TiO2−x/CuFe2O4 (Ti3+ self-doped titania coupled with copper ferrite), an efficient sonocatalyst for ibuprofen (IBP) mitigation. Compared with TiO2−x or CuFe2O4, the TiO2−x/CuFe2O4 heterojunction displayed enhanced sono-oxidation performance, and their immobilization onto diatomaceous earth (DE) further increased the oxidation rate. The effects of various parameters on sono-oxidation efficiency were studied, such as pH, IBP concentration, catalyst dosage, co-existing microplastics and chemicals, ultrasonic power and frequency, and introduction of persulfate. Quenching tests demonstrated the roles of reactive species. The intermediates during IBP sono-oxidation were determined by the HPLC-MS method, and the acute toxicity was studied. Furthermore, the reaction mechanism was proposed. The sonocatalyst revealed excellent reusability, suggesting that it is promising for wastewater treatment.

Graphical abstract: Fabrication of black TiO2−x/CuFe2O4 decorated on diatomaceous earth with enhanced sonocatalytic activity for ibuprofen mitigation

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Article information


Submitted
23 Jul 2020
Accepted
19 Sep 2020
First published
21 Sep 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Fabrication of black TiO2−x/CuFe2O4 decorated on diatomaceous earth with enhanced sonocatalytic activity for ibuprofen mitigation

Q. Wu and Z. Zhang, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY01478H

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