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Catalytic activation of peroxymonosulfate with manganese cobaltite nanoparticles for the degradation of organic dyes.
Dung, Nguyen Trung; Thu, Tran Viet; Van Nguyen, To; Thuy, Bui Minh; Hatsukano, Masahito; Higashimine, Koichi; Maenosono, Shinya; Zhong, Ziyi.
Afiliação
  • Dung NT; Department of Chemical Engineering, Le Quy Don Technical University 236 Hoang Quoc Viet Hanoi 100000 Vietnam tranvietthu1@duytan.edu.vn +84 964 793 732.
  • Thu TV; Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam.
  • Van Nguyen T; Department of Chemical Engineering, Le Quy Don Technical University 236 Hoang Quoc Viet Hanoi 100000 Vietnam tranvietthu1@duytan.edu.vn +84 964 793 732.
  • Thuy BM; Department of Chemical Engineering, Le Quy Don Technical University 236 Hoang Quoc Viet Hanoi 100000 Vietnam tranvietthu1@duytan.edu.vn +84 964 793 732.
  • Hatsukano M; School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST) 1-1 Asahidai Nomi Ishikawa 923-1292 Japan.
  • Higashimine K; School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST) 1-1 Asahidai Nomi Ishikawa 923-1292 Japan.
  • Maenosono S; School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST) 1-1 Asahidai Nomi Ishikawa 923-1292 Japan.
  • Zhong Z; College of Engineering, Guangdong Technion Israel Institute of Technology (GTIIT) 241 Daxue Road Shantou 515063 China.
RSC Adv ; 10(7): 3775-3788, 2020 Jan 22.
Article em En | MEDLINE | ID: mdl-35492672
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 -, CO3 2- 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.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: RSC Adv Ano de publicação: 2020 Tipo de documento: Article País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: RSC Adv Ano de publicação: 2020 Tipo de documento: Article País de publicação: Reino Unido