Regular Article

Nanoporous structures with Fe⁰/Fe^II/Fe^III co-existed as catalysts for phenol degradation

¹ College of Material Science and Engineering, Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, P.R. China
² Suzhou Boson Material Technology Co. Ltd., Suzhou 215164, P.R. China

^* e-mail: zhaozk@ccut.edu.cn

Received: 17 October 2022
Received in final form: 16 February 2023
Accepted: 10 March 2023
Published online: 12 April 2023

Abstract

Fe-based amorphous alloy was widely concerned in the field of wastewater treatment because of its nanoporous structure, which has higher reactivity activity. However, as it is easy to get oxidative poisoning, its long-term reactivity activity is restricted. A uniform nanoporous layer has been synthesized by mechanical attrition and dealloying on the surface of Fe₇₆Si₉B₁₀P₅ amorphous alloy powders in this work. In the test of catalytic performance, due to nanoporous structure, Fe⁰/Fe^Ⅱ/Fe^Ⅲ are involved in the Fenton process at the same time. The Fenton reaction was further catalyzed to generate more active group  · OH; therefore, the degradation rate reaches 99.8% within 60 min. This coexistence of Fe⁰/Fe^II/Fe^III persisted after five cycles of the catalytic reaction, indicating the excellent catalytic stability of the catalyst. Using this tunable pretreatment method for surface activation, novel applications for metallic glasses can be developed.