Metal-complexed covalent organic frameworks derived N-doped carbon nanobubble-embedded cobalt nanoparticle as a magnetic and efficient catalyst for oxone activation
- Authors
- Ha Trang Nguyen; Lee, Jechan; Kwon, Eilhann; Lisak, Grzegorz; Bui Xuan Thanh; Wen Da Oh; Lin, Kun-Yi Andrew
- Issue Date
- Jun-2021
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Covalent organic frameworks; Co NPs; N-doped carbon; Magnetic; Oxone
- Citation
- JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.591, pp.161 - 172
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF COLLOID AND INTERFACE SCIENCE
- Volume
- 591
- Start Page
- 161
- End Page
- 172
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190173
- DOI
- 10.1016/j.jcis.2021.01.108
- ISSN
- 0021-9797
- Abstract
- While Cobalt nanoparticles (Co NPs) are useful for catalytic Oxone activation, it is more advantageous to embed/immobilize Co NPs on nitrogen-doped carbon substrates to provide synergy for enhancing catalytic performance. Herein, this study proposes to fabricate such a composite by utilizing covalent organic frameworks (COF) as a precursor. Through complexation of COF with Co, a stable product of Co-complexed COF (Co-COF) can be synthesized. This Co-COF is further converted through pyrolysis to N-doped carbon in which cobaltic NPs are embedded. Owing to its well-defined structures of Co-COF, the pyrolysis process transforms COF into N-doped carbon with a bubble-like morphology. Such Co NP-embedded N-doped carbon nanobubbles (CoCNB) with pores, magnetism and Co, shall be a promising catalyst. Thus, CoCNB shows a much stronger catalytic activity than commercial Co3O4 NPs to activate Oxone to degrade toxic Amaranth dye (AMD). CoCNB-activated Oxone also achieves a significantly lower E-a value of AMD degradation (i.e., 27.9 kJ/mol) than reported E-a values in previous literatures. Besides, CoCNB is still effective for complete elimination of AMD in the presence of high-concentration NaCl and surfactants, and CoCNB is also reusable over five consecutive cycles.
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