Carbon dots capped cerium oxide nanoparticles for highly efficient removal and sensitive detection of fluoride

Song Meng; Zhihao Yao; Jiawei Liu; Erjing Wang; Cao Li; Bingbing Jiang; Ziqiang Xu

doi:10.1016/j.jhazmat.2022.128976

Carbon dots capped cerium oxide nanoparticles for highly efficient removal and sensitive detection of fluoride

J Hazard Mater. 2022 Aug 5:435:128976. doi: 10.1016/j.jhazmat.2022.128976. Epub 2022 Apr 20.

Authors

Song Meng¹, Zhihao Yao¹, Jiawei Liu¹, Erjing Wang¹, Cao Li¹, Bingbing Jiang², Ziqiang Xu³

Affiliations

¹ Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
² Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China. Electronic address: bingbingjiang@hubu.edu.cn.
³ Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China. Electronic address: ziqiang.xu@hubu.edu.cn.

PMID: 35472541
DOI: 10.1016/j.jhazmat.2022.128976

Abstract

Since the excess exposure to F^- may induce serious issues to human health, the effective adsorption and sensitive detection of F^- is essential. Therefore, carbon dots (CDs) capped CeO₂ (CeO₂@CDs) was synthesized via hydrothermal treatment of tannic acid and CeCl₃. Due to abundant phenolic hydroxyl are reserved and excellent hydrophilicity, CeO₂@CDs possess high F^- adsorption capacity. The partition coefficient parameters (PC) are determined to be 2.65 L/g, which is comparable with previous work. The kinetics results and adsorption isotherm are consistent with pseudo-second-order model and Freundlich model, respectively, indicating the chemisorption dominate the adsorption, mainly via the ion exchange between hydroxyl and F^-. Since phenolic hydroxyl existed on the CeO₂@CDs, synergetic effect of CDs and CeO₂ contribute to superior ROS eliminating capacity, even at acidic conditions. Moreover, due to the ROS scavenging of CeO₂ @CDs abilities can be potentiated by F^-, colorimetric detection of F^- can be realized via horseradish peroxidase as an indicator. The linear range is 0.3-2.1 mM with limit of detection is 0.13 mg/L. The current results imply that CeO₂@CDs possess potential in both efficient removal and sensitive detection of F^- related contamination issues and elucidation of development to address other anions related issues.

Keywords: Carbon dots; Ceria; Chemisorption; Colorimetric detection; Fluoride.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Carbon
Cerium*
Fluorides
Humans
Nanoparticles*
Reactive Oxygen Species

Substances

Reactive Oxygen Species
Cerium
ceric oxide
Carbon
Fluorides