Issue 5, 2024

Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Abstract

This work presents a novel approach for the design and the stabilization of cobalt oxide nanoparticles supported on g-C3N4 (CoCN-x) catalyst to efficiently degrade various organic pollutants through peroxymonosulfate (PMS) activation. The catalyst support synthesis process involved a two-step thermal treatment of urea, resulting in high-purity g-C3N4 material, confirmed by XPS, 13C NMR, and TGA analyses. Two cobalt oxide NP-based catalysts, CoO and α-Co(OH)2, were then prepared by depositing the cobalt nanoparticles on the g-C3N4 support using gas-phase reduction by H2 (CoCN–H2) and liquid-phase reduction by NaBH4 (CoCN–NaBH4), respectively. The prepared CoCN-x materials were characterized using several techniques, such as FTIR spectroscopy, XRD, TEM, and SEM-EDS, which evidenced that the cobalt oxides were successfully introduced into g-C3N4. The effectiveness of the prepared catalysts in degrading organic contaminants was evaluated by activating PMS to generate reactive oxygen species (ROSs), 1O2, SO4˙, O2˙, and HO˙, as confirmed through quenching experiments and electron paramagnetic resonance (EPR) analysis. These ROSs were responsible for the oxidation of the target contaminants, thereby promoting their mineralization. The results showed that both catalysts, CoCN–NaBH4 and CoCN–H2, exhibited high catalytic activity throughout a wide pH spectrum, achieving hence complete degradation yields for various organic dyes, including OG, MO, BM, and RhB.

Graphical abstract: Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Article information

Article type
Paper
Submitted
07 10月 2023
Accepted
04 1月 2024
First published
04 1月 2024
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2024,5, 1960-1976

Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

A. Ben Hamou, M. Enneiymy, S. Farsad, A. Amjlef, A. Chaoui, N. Nouj, A. Majdoub, A. Jada, M. Ez-zahery and N. El Alem, Mater. Adv., 2024, 5, 1960 DOI: 10.1039/D3MA00818E

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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

Spotlight

Advertisements