Issue 14, 2022

Copper-doped carbon dots with enhanced Fenton reaction activity for rhodamine B degradation

Abstract

The Fenton reaction has attracted extensive attention due to its potential to be a highly efficient and environmentally friendly wastewater treatment technology. Noble copper-doped carbon dots (CuCDs) are prepared through a simple one-step hydrothermal method with 3,4-dihydroxyhydrocinnamic acid, 2,2′-(ethylenedioxy)bis(ethylamine) and copper chloride, endowing the Fenton reaction with enhanced catalytic activity for rhodamine B (RhB) degradation. The effects of the concentration of CuCDs, temperature, pH, oxygen (O2), metal ions and polymers on the catalytic activity of CuCDs are investigated. It is worth noting that electron transfer happening on the surface of CuCDs plays a vital role in the RhB degradation process. As evidenced by radical scavenger experiments and electron spin resonance (ESR) studies, CuCDs significantly boost the formation of hydroxyl radicals (˙OH) and singlet oxygen (1O2), facilitating the Fenton reaction for RhB degradation. Due to the strong oxidation of ROS generated by the Fe2+ + H2O2 + CuCD system, RhB degradation may involve the cleavage of the chromophore aromatic ring and the de-ethylation process. Additionally, the toxicity of RhB degradation filtrates is assessed in vitro and in vivo. The as-prepared CuCDs may be promising catalytic agents for the enhancement of the Fenton reaction.

Graphical abstract: Copper-doped carbon dots with enhanced Fenton reaction activity for rhodamine B degradation

Supplementary files

Article information

Article type
Paper
Submitted
30 Apr. 2022
Accepted
07 Jūn. 2022
First published
08 Jūn. 2022
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2022,4, 3073-3082

Copper-doped carbon dots with enhanced Fenton reaction activity for rhodamine B degradation

Z. Jin, Q. Li, P. Tang, G. Li, L. Liu, D. Chen, J. Wu, Z. Chai, G. Huang and X. Chen, Nanoscale Adv., 2022, 4, 3073 DOI: 10.1039/D2NA00269H

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