A fluorometric paper test for chromium(VI) based on the use of N-doped carbon dots

Kun Hua Lu, Jia Hui Lin, Cheng Yu Lin, Chien Fu Chen, Yi Chun Yeh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Water-soluble nitrogen-doped carbon quantum dots (C-dots) were fabricated by microwave-induced decomposition of the precursor materials citric acid and N,N′-bis(2-aminoethyl)-1,2-ethanediamine. The C-dots were placed on portable paper strips with novel origami designs to simplified user operations. The intensity of the blue fluorescence, best measured at excitation/emission wavelengths of 330/420 nm, depends on the pH value in the range from pH 2 to 12. The C-dots on the paper stripe are shown to be a sensitive fluorescent probe for chromium(VI) via an inner filter effect. Response is linear in the 0.08 to 1 mM concentration range, and the detection limit (at S/N = 3) is 0.14 mM. The test was applied to the determination of chromium(VI) in (spiked) environmental water samples. [Figure not available: see fulltext.].

Original languageEnglish
Article number227
JournalMicrochimica Acta
Volume186
Issue number4
DOIs
Publication statusPublished - 2019 Apr 1

Fingerprint

Semiconductor quantum dots
ethylenediamine
Carbon
Water
Fluorescent Dyes
Citric Acid
Nitrogen
Fluorescence
Microwaves
Decomposition
Wavelength
chromium hexavalent ion

Keywords

  • Carbon dots
  • Chromium(VI)
  • Environmental analysis
  • Fluorescence
  • Origami
  • Paper microfluidic
  • Three-dimensional paper analytical devices

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

A fluorometric paper test for chromium(VI) based on the use of N-doped carbon dots. / Lu, Kun Hua; Lin, Jia Hui; Lin, Cheng Yu; Chen, Chien Fu; Yeh, Yi Chun.

In: Microchimica Acta, Vol. 186, No. 4, 227, 01.04.2019.

Research output: Contribution to journalArticle

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AU - Yeh, Yi Chun

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