Catalytic activation of peroxymonosulfate with manganese cobaltite nanoparticles for the degradation of organic dyes

TY - JOUR

T1 - Catalytic activation of peroxymonosulfate with manganese cobaltite nanoparticles for the degradation of organic dyes

AU - Dung, Nguyen Trung

AU - Thu, Tran Viet

AU - Van Nguyen, To

AU - Thuy, Bui Minh

AU - Hatsukano, Masahito

AU - Higashimine, Koichi

AU - Maenosono, Shinya

AU - Zhong, Ziyi

N1 - Publisher Copyright: © 2020 The Royal Society of Chemistry.

PY - 2020

Y1 - 2020

N2 - In this work, we report the facile hydrothermal synthesis of manganese cobaltite nanoparticles (MnCo2O4.5 NPs) which can efficiently activate peroxymonosulfate (PMS) for the generation of sulfate free radicals (SO4-) and degradation of organic dyes. The synthesized MnCo2O4.5 NPs have a polyhedral morphology with cubic spinel structure, homogeneously distributed Mn, Co, and O elements, and an average size less than 50 nm. As demonstrated, MnCo2O4.5 NPs showed the highest catalytic activity among all tested catalysts (MnO2, CoO) and outperformed other spinel-based catalysts for Methylene Blue (MB) degradation. The MB degradation efficiency reached 100% after 25 min of reaction under initial conditions of 500 mg L-1 Oxone, 20 mg L-1 MnCo2O4.5, 20 mg L-1 MB, unadjusted pH, and T = 25 °C. MnCo2O4.5 NPs showed a great catalytic activity in a wide pH range (3.5-11), catalyst dose (10-60 mg L-1), Oxone concentration (300-1500 mg L-1), MB concentration (5-40 mg L-1), and temperature (25-55 °C). HCO3-, CO32- and particularly Cl- coexisting anions were found to inhibit the catalytic activity of MnCo2O4.5 NPs. Radical quenching experiments revealed that sulfate radicals are primarily responsible for MB degradation. A reaction sequence for the catalytic activation of PMS was proposed. The as-prepared MnCo2O4.5 NPs could be reused for at least three consecutive cycles with small deterioration in their performance due to low metal leaching. This study suggests a facile route for synthesizing MnCo2O4.5 NPs with high catalytic activity for PMS activation and efficient degradation of organic dyes.

AB - In this work, we report the facile hydrothermal synthesis of manganese cobaltite nanoparticles (MnCo2O4.5 NPs) which can efficiently activate peroxymonosulfate (PMS) for the generation of sulfate free radicals (SO4-) and degradation of organic dyes. The synthesized MnCo2O4.5 NPs have a polyhedral morphology with cubic spinel structure, homogeneously distributed Mn, Co, and O elements, and an average size less than 50 nm. As demonstrated, MnCo2O4.5 NPs showed the highest catalytic activity among all tested catalysts (MnO2, CoO) and outperformed other spinel-based catalysts for Methylene Blue (MB) degradation. The MB degradation efficiency reached 100% after 25 min of reaction under initial conditions of 500 mg L-1 Oxone, 20 mg L-1 MnCo2O4.5, 20 mg L-1 MB, unadjusted pH, and T = 25 °C. MnCo2O4.5 NPs showed a great catalytic activity in a wide pH range (3.5-11), catalyst dose (10-60 mg L-1), Oxone concentration (300-1500 mg L-1), MB concentration (5-40 mg L-1), and temperature (25-55 °C). HCO3-, CO32- and particularly Cl- coexisting anions were found to inhibit the catalytic activity of MnCo2O4.5 NPs. Radical quenching experiments revealed that sulfate radicals are primarily responsible for MB degradation. A reaction sequence for the catalytic activation of PMS was proposed. The as-prepared MnCo2O4.5 NPs could be reused for at least three consecutive cycles with small deterioration in their performance due to low metal leaching. This study suggests a facile route for synthesizing MnCo2O4.5 NPs with high catalytic activity for PMS activation and efficient degradation of organic dyes.

UR - http://www.scopus.com/inward/record.url?scp=85078861979&partnerID=8YFLogxK

U2 - 10.1039/c9ra10169a

DO - 10.1039/c9ra10169a

M3 - 文章

AN - SCOPUS:85078861979

SN - 2046-2069

VL - 10

SP - 3775

EP - 3788

JO - RSC Advances

JF - RSC Advances

IS - 7

ER -