Highly selective detection of p-nitrophenol using fluorescence assay based on boron, nitrogen co-doped carbon dots

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Na Xiao
  • Shi Gang Liu
  • Na Li
  • Yan Jun Ju
  • Yu Ling
  • Nian Bing Li
  • Hong Qun Luo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)184-192
Journal / PublicationTalanta
Volume184
Online published2 Mar 2018
Publication statusPublished - 1 Jul 2018

Abstract

p-Nitrophenol (p-NP) contaminants seriously endanger environmental and living beings health, hence to establish a sensitive and selective method is of great importance for the determination of p-NP. In this work, boron and nitrogen co-doped carbon dots (B,N-CDs) were synthesized by one-step hydrothermal method using 3-aminophenylboronic acid as the sole precursor. The product was characterized through high-resolution transmission electron microscopy, fluorescence spectroscopy, UV–visible absorption spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. Without any functionalized modification, B,N-CDs can be directly applied as a ‘turn-off’ fluorescent probe for rapid, highly selective, and sensitive detection of p-NP. The fluorescent sensor based on the B,N-CDs exhibited a broad linear response to the concentration of p-NP in the range of 0.5 − 60 μM and 60 − 200 μM, respectively, and provided a detection limit of 0.2 μM. It was found that only the absorption spectrum of p-NP has a wide overlap with the fluorescence excitation and emission spectra of B,N-CDs compared to those of other representative analogues. The response mechanism was due to the inner filter effect and the formation of dynamic covalent B-O bonds between B,N-CDs and p-NP, which endowed the sensing platform with the rapid response and high selectivity to p-NP. Finally, the sensor showed the practicability of p-NP determination in environmental water samples.

Research Area(s)

  • Boron, nitrogen co-doped carbon dots, Fluorescent sensor, Inner filter effect, p‐Nitrophenol

Citation Format(s)

Highly selective detection of p-nitrophenol using fluorescence assay based on boron, nitrogen co-doped carbon dots. / Xiao, Na; Liu, Shi Gang; Mo, Shi; Li, Na; Ju, Yan Jun; Ling, Yu; Li, Nian Bing; Luo, Hong Qun.

In: Talanta, Vol. 184, 01.07.2018, p. 184-192.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review