Cited by 41Advanced oxidation water treatmentAdvanced Photocatalysis TechniquesAdsorption and biosorption for pollutant removal

CO2 as a reaction medium for pyrolysis of lignin leading to magnetic cobalt-embedded biochar as an enhanced catalyst for Oxone activation

Yang, Ming-Tong, Tong, Wai-Chi, Lee, Jechan, Kwon, Eilhann, Lin, Kun-Yi Andrew·2019·Journal of Colloid and Interface Science

Abstract

Carbonaceous materials have been proven as advantageous supports for anchoring cobalt (Co) nanoparticles (NPs) to formulate Co/carbon composite catalysts for Oxone activation in degrading pollutants in water. While Co/carbon composites represent attractive catalysts, most carbonaceous supports are usually sophisticatedly fabricated using fine chemicals and immobilization of Co on carbon supports requires complicated post-modifications. As biochar appears as a versatile but easily-accessible carbon, pyrolysis of Co/lignin can result in a promising Co/biochar (CoBC) catalyst for Oxone activation. Especially, when CO 2 is used to replace N 2 as a reaction medium for pyrolysis of Co/lignin, the syngas production from pyrolysis can be enhanced and a magnetic CoBC is also obtained. This CoBC appears as a micro-sized composite of Co nanoparticles (NPs) well-distributed and embedded within carbon matrices, and exhibits several advantageous properties, such as high porosity, large surface area and magnetism, making it an advantageous catalyst for activating Oxone in water. As decolorization of Amaranth (AMR) dye is employed as a model test, CoBC successfully activates Oxone to fully decolorize AMR within 60 min with a rate constant of 0.33 min-1. CoBC also exhibits a much higher catalytic activity than CoBC prepared from pyrolysis in N 2, and Co 3 O 4, revealing its promising advantages. The activation energy of AMR decolorization by CoBC-activated Oxone is 48 kJ/mol, which is also lower than those reported in other studies. CoBC can be also re-used to activate Oxone over multiple cycles. These findings validate that CoBC is certainly a promising heterogeneous catalyst, which can be simply prepared from pyrolysis of Co/lignin in CO 2 with concomitant enhanced syngas production.

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Crossref · 10.1016/j.jcis.2019.02.090

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63 of 63 references verified0 citation errors · 0 not checkable

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  • In present manganese-, cobalt-, or some bimetallic-biochar researches, redox recycling potential was still poorly optimized.

    “For the present manganese-, cobalt-, or some bimetallic-biochar researches, the metal centres were deployed merely as Lewis basic sites or electron donors during the electron-mediated processes, and redox recycling potential were still poorly optimized.64,[142][143][144][145][146][147]”
  • In present manganese-, cobalt-, or some bimetallic-biochar researches, metal centres were deployed merely as Lewis basic sites or electron donors during electron-mediated processes.

    “For the present manganese-, cobalt-, or some bimetallic-biochar researches, the metal centres were deployed merely as Lewis basic sites or electron donors during the electron-mediated processes, and redox recycling potential were still poorly optimized.64,[142][143][144][145][146][147]”

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Authors
Yang, M.-T., Tong, W.-C., Lee, J., Kwon, E., & Lin, K.-Y. A.
Affiliations
  • National Chung Hsing University (TW)
  • Ajou University (KR)
  • Sejong University (KR)
Corresponding author
  • Lee, Jechan
  • Kwon, Eilhann
  • Lin, Kun-Yi Andrew
Venue
Journal of Colloid and Interface Science
Publisher
Elsevier BV
Published
2019-06
Volume
545
Pages
16-24
ISSN
0021-9797 (ISSN-L)
OpenAlex
W2918315158
Cited by
41
References
63
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 9 · 2019: 3
FWCI
2.44
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Colloid and Interface Science (publishedVersion)
  • PubMed (publishedVersion)
  • NCHU Institutional Repository CRIS (submittedVersion)
Funders
  • Ministry of Science and Technology, Taiwan
  • Ministry of Education
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
Keywords
cobalt nanoparticles, biochar, lignin pyrolysis, magnetic catalyst, heterogeneous catalysis, syngas production, Co3O4, dye wastewater treatment, catalyst reusability

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