Yellow emissive Se,N-codoped carbon dots toward sensitive fluorescence assay of crystal violet

Yaoping Hu; Zhijin Gao

doi:10.1016/j.jhazmat.2020.122073

Yellow emissive Se,N-codoped carbon dots toward sensitive fluorescence assay of crystal violet

J Hazard Mater. 2020 Apr 15:388:122073. doi: 10.1016/j.jhazmat.2020.122073. Epub 2020 Jan 16.

Authors

Yaoping Hu¹, Zhijin Gao²

Affiliations

¹ School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China. Electronic address: chem_yphu@yahoo.com.
² Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.

PMID: 31968303
DOI: 10.1016/j.jhazmat.2020.122073

Abstract

Crystal violet (CV), a hazardous dye, poses a serious threat to the environment and human health. This motivates us to develop a facile method for its sensitive detection. Herein, we demonstrate a rapid sensing of CV using a novel fluorescent nanomaterial, yellow emissive Se,N-codoped carbon dots (CDs). CDs with an intense photoluminescence peak at 566 nm are synthesized by a hydrothermal technique using selenourea and o-phenylenediamine as precursors. This material shows a high quantum yield of up to 16.7 %. It is found that the yellow fluorescence of CDs can be selectively quenched by CV, which makes them promising for CV sensing. The linearity is obeyed in the range of 0.02-1.60 μM, and the limit of detection is as low as 7.3 nM. After detailed investigations, the inner filter effect is proposed to be the sensing mechanism. For practical usage, the newly built method is applied to determine the trace amount of CV in fish tissue samples, and satisfactory results are obtained.

Keywords: Carbon dots; Crystal violet; Inner filter effect; Sensitive detection; Yellow fluorescence.

Publication types

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