Search
3D mesoporous α-Co(OH)2 nanosheets electrodeposited on nickel foam: A new generation of macroscopic cobalt-based hybrid for peroxymonosulfate activation
Abstract
Cobalt-based catalysts with high stability and facile recovery for heterogeneous peroxymonosulfate (PMS) activation are still rather sparse and therefore highly desirable. Herein, 3D mesoporous α-Co(OH)2 nanosheets was created on robust nickel foam (NF) via facile electrodeposition approach at 6 mA/cm2 for only 400 s. Almost complete removal of phenol can be achieved within 7 min with a degradation rate of 0.39 min−1, 2 times higher than that with ever-prevalent Co3O4 derived from direct calcination of α-Co(OH)2/NF. This can be attributed to the hydrotalcite-like hexagonal structure of α-Co(OH)2 with large interlayer spacing for enhancing the catalytic performance. The low activation energy of Co(OH)2/NF (53.8 kJ/mol) indicates its lower reaction energy barrier for PMS activation. Moreover, the influences of electrodeposition parameters (i.e. current density, deposition time), PMS dosage, initial pH and coexisting anions (HCO3−, SO42−, Cl−) on the phenol degradation were systematically evaluated. The recycling tests revealed the prominent stability of Co(OH)2/NF. The quenching tests verified that SO4− radicals acted as the predominant reactive species for phenol decomposition. The possible reaction mechanisms were proposed based on the intermediates identification. The findings of this work suggest the great potentials of the 3D macroscopic Co(OH)2/NF in water purification, and open up new avenues for scalable preparing recyclable heterogeneous catalysts.
Citations
-
1 4 9
CrossRef
-
0
Web of Science
-
1 5 7
Scopus
Authors (9)
-
Ruixia Yuan
-
Minglang Jiang
-
Simeng Gao
-
Zhaohui Wang
-
Huaiyuan Wang
-
Zhanjian Liu
-
Jun Ma
-
Zhijun Li
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
CHEMICAL ENGINEERING JOURNAL
no. 380,
ISSN: 1385-8947 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Yuan R., Jiang M., Gao S., Wang Z., Wang H., Boczkaj G., Liu Z., Ma J., Li Z.: 3D mesoporous α-Co(OH)2 nanosheets electrodeposited on nickel foam: A new generation of macroscopic cobalt-based hybrid for peroxymonosulfate activation// CHEMICAL ENGINEERING JOURNAL -Vol. 380, (2020), s.122447-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.cej.2019.122447
- Verified by:
- Gdańsk University of Technology
seen 619 times
Recommended for you
Thermally activated natural chalcopyrite for Fenton-like degradation of Rhodamine B: Catalyst characterization, performance evaluation, and catalytic mechanism
- J. Yang,
- K. Jia,
- S. Lu
- + 3 authors
Application of persulfate-based oxidation processes to address diverse sustainability challenges: A critical review
- D. Lin,
- Y. Fu,
- X. Li
- + 9 authors
Hierarchical MnO2 nanoflowers blooming on 3D nickel foam: A novel micro-macro catalyst for peroxymonosulfate activation
- R. Yuan,
- Z. Jiang,
- Z. Wang
- + 4 authors