Hierarchical MnO2 nanoflowers blooming on 3D nickel foam: A novel micro-macro catalyst for peroxymonosulfate activation - Publication - Bridge of Knowledge

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Hierarchical MnO2 nanoflowers blooming on 3D nickel foam: A novel micro-macro catalyst for peroxymonosulfate activation

Abstract

In this work, birnessite-type δ-MnO2 nanoflowers were uniformly deposited on 3D nickel foam (NF) by one-step hydrothermal route for high-efficient activation of peroxymonosulfate (PMS) towards degradation of acid orange 7 (AO7). High specific surface area, large pore volume and 3D hierarchical structure promotes the mass and electron transfer for great catalytic activity. Low reaction energy barrier (Ea=27.5 kJ/mol) and outstanding reusability with extremely low manganese leaching during recycling (< 0.06 mg/L) was achieved due to the 3D hierarchical structure which could effectively avoid the agglomeration of nano-sized MnO2. SO4•- was confirmed to be the predominant reactive species for AO7 decomposition by electron spin resonance and quenching tests. The synergistic catalytic mechanism of MnO2/NF and the role of inner-sphere complexation between the active sites of MnO2 and peroxymonosulfate were thoroughly investigated. Compared with traditional nano/micro-sized catalysts, 3D macroscopic MnO2/NF with facile recovery and high stability potentially facilitates fascinating applications as green heterogeneous catalysis approach.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF COLLOID AND INTERFACE SCIENCE no. 571, pages 142 - 154,
ISSN: 0021-9797
Language:
English
Publication year:
2020
Bibliographic description:
Yuan R., Jiang Z., Wang Z., Gao S., Liu Z., Li M., Boczkaj G.: Hierarchical MnO2 nanoflowers blooming on 3D nickel foam: A novel micro-macro catalyst for peroxymonosulfate activation// JOURNAL OF COLLOID AND INTERFACE SCIENCE -Vol. 571, (2020), s.142-154
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jcis.2020.03.041
Verified by:
Gdańsk University of Technology

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