Fe single atoms anchored on fluorine-doped ultrathin carbon nanosheets for sensitive colorimetric detection of p-phenylenediamine

Xiaofang Chen; Min Feng; Xiaoyi Xie; Yi Zhang; Jie Zhang; Xiupei Yang

doi:10.1016/j.talanta.2022.123487

Fe single atoms anchored on fluorine-doped ultrathin carbon nanosheets for sensitive colorimetric detection of p-phenylenediamine

Talanta. 2022 Aug 15:246:123487. doi: 10.1016/j.talanta.2022.123487. Epub 2022 Apr 22.

Authors

Xiaofang Chen¹, Min Feng¹, Xiaoyi Xie¹, Yi Zhang¹, Jie Zhang¹, Xiupei Yang²

Affiliations

¹ College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China.
² College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China. Electronic address: xiupeiyang@cwnu.edu.cn.

PMID: 35487013
DOI: 10.1016/j.talanta.2022.123487

Abstract

Single-atom catalysts have attracted enormous research interest in the field of catalysis owing to their remarkable catalytic activity, excellent stability and outstanding atom utilization. Herein, a new single atom based on single Fe atoms on fluorine-doped (Fe-SAs@FNC) ultrathin carbon nanosheets was successfully synthesized by a polymer-assisted heating method. Experimental evidence showed that the resultant Fe-SAs@FNC with Fe-N₄ sites exhibits superior peroxidase-like activity, which oxidizes the colorless 3,3',5,5'-tetramethylbenzidine (TMB) to produce a blue product in the presence of hydrogen peroxide (H₂O₂). Based on this, an ultrasensitive and highly selective colorimetric detection method for p-phenylenediamine (PPD) in hair dyes and PPD in hair after dyeing was established, which had a wide linear range (0.2-50 μM) and low detection limit (0.07 μM). This method shows satisfactory sensitivity and selectivity.

Keywords: Fluorine-doped; Hair dyes; Peroxidase-like activity; Single-atom catalysts.

MeSH terms

Carbon
Colorimetry* / methods
Fluorine
Hair Dyes* / chemistry
Hydrogen Peroxide
Phenylenediamines* / analysis

Substances

Hair Dyes
Phenylenediamines
Fluorine
Carbon
Hydrogen Peroxide
4-phenylenediamine