Issue 5, 2024

Regulating the type of nitrogen to improve the performance of Co–N/C with a confinement effect in peroxymonosulfate activation for the effective degradation of organic pollutants

Abstract

Water pollution has always been an issue of significant human concern, and the development of effective wastewater treatment processes is important. Herein, three Co–N/C-based catalysts with different types of nitrogen were fabricated and employed to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation. Due to the existence of a spatial confinement effect, all the Co–N/C-based catalysts showed excellent catalytic activities, and the removal efficiencies of TC were over 90% within 10 min. Notably, current results indicate that the Co–N/C-based catalyst rich in pyridinic N provides electrons to break the peroxy bonds of PMS for generating SO4˙, while the Co–N/C-based catalyst containing more pyrrolic N acquires electrons from PMS to produce SO5˙, which is further converted into 1O2. Moreover, the Co–N/C-based catalyst rich in graphitic N displayed good performance in electron transfer and can mediate the direct electron transfer process between TC and PMS. More interestingly, radical-induced oxidation exhibited a high TOC removal efficiency, but the corresponding anti-interference ability was weak. 1O2-induced oxidation and direct electron transfer process had a high removal efficiency for TC and good anti-interference ability, but the mineralization efficiency was relatively low. In short, the current work will provide a valuable reference for future research.

Graphical abstract: Regulating the type of nitrogen to improve the performance of Co–N/C with a confinement effect in peroxymonosulfate activation for the effective degradation of organic pollutants

Supplementary files

Article information

Article type
Paper
Submitted
22 פבר 2024
Accepted
01 אפר 2024
First published
02 אפר 2024

Environ. Sci.: Nano, 2024,11, 2010-2020

Regulating the type of nitrogen to improve the performance of Co–N/C with a confinement effect in peroxymonosulfate activation for the effective degradation of organic pollutants

Y. Cong, L. Ye, Q. Zheng, Y. Wang, Y. Shao, X. Ren and S. Lv, Environ. Sci.: Nano, 2024, 11, 2010 DOI: 10.1039/D4EN00145A

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

Spotlight

Advertisements