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

08:00 EDT 11th March 2020 | BioPortfolio

Summary of "Hierarchical MnO nanoflowers blooming on 3D nickel foam: A novel micro-macro catalyst for peroxymonosulfate activation."

In this work, birnessite-type δ-MnO 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 (E = 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 MnO. SO was confirmed to be the predominant reactive species for AO7 decomposition by electron spin resonance and quenching tests. The synergistic catalytic mechanism of MnO/NF and the role of inner-sphere complexation between the active sites of MnO and peroxymonosulfate were thoroughly investigated. Compared with traditional nano/micro-sized catalysts, 3D macroscopic MnO/NF with facile recovery and high stability potentially facilitates fascinating applications as green heterogeneous catalysis approach.

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This article was published in the following journal.

Name: Journal of colloid and interface science
ISSN: 1095-7103
Pages: 142-154

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