Jump to main content
Jump to site search
SCHEDULED MAINTENANCE Close the message box

Maintenance work is planned for Monday 16 August 2021 from 07:00 to 23:59 (BST).

Website performance may be temporarily affected and you may not be able to access some PDFs or images. If this does happen, refreshing your web browser should resolve the issue. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 43, 2013

Two-step synthesis of agglomeration-free peroxidase-like Co3O4nanoparticles–carbon nitride nanotube hybrids enabling a high redox activity

Author affiliations

Abstract

We report a two-step synthesis method to fabricate peroxidase-like Co3O4 nanoparticles–carbon nitride nanotube (Co3O4 NPs–CNNT) hybrid catalysts enabling a high redox activity. At first, the energy-dispersive spectrometer mapping shows that the CNNT surface is wrapped by the Co(OH)2 after the first solvothermal step using cobalt acetylacetonate of Co(acac)3 precursor and triethylene glycol solvent. Also, the X-ray diffraction and photoelectron spectroscopy measurements support that the subsequent heat treatment transforms the Co(OH)2 into the crystalline Co3O4 NPs on the CNNT. Also, the near-edge X-ray absorption fine structure analysis and density functional theory calculations provide a clue regarding the role of pyridine- and graphite-like N atoms of the CNNT to anchor agglomeration-free Co3O4 NPs on its surface. Indeed, the Co3O4 NPs–CNNT hybrid shows high peroxidase-like redox activity for 3,3,5,5-tetramethylbenzidine (TMB) in the presence of H2O2. Furthermore, the electron spinning resonance analysis elucidates the mechanism for the high peroxidase-like redox activity, where the electrons of Co3O4 NPs and a CNNT first move to H2O2 and then H2O2 form one OH radicals and one OH ion. Next, TMB is oxidized by a Co3O4 NPs–CNNT hybrid and generates electrons. Then, the generated electrons offset to maintain the neutral state of a Co3O4 NPs–CNNT hybrid. The XRD data of a Co3O4 NPs–CNNT hybrid after the peroxidase reaction further supports our proposed model.

Graphical abstract: Two-step synthesis of agglomeration-free peroxidase-like Co3O4 nanoparticles–carbon nitride nanotube hybrids enabling a high redox activity

Supplementary files

Article information


Submitted
29 Apr 2013
Accepted
14 Aug 2013
First published
19 Aug 2013

RSC Adv., 2013,3, 20179-20185
Article type
Paper

Two-step synthesis of agglomeration-free peroxidase-like Co3O4 nanoparticles–carbon nitride nanotube hybrids enabling a high redox activity

C. O. Song, J. W. Lee, H. S. Choi and J. K. Kang, RSC Adv., 2013, 3, 20179 DOI: 10.1039/C3RA42117A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements