Novel nitrogen-doped carbon dots prepared under microwave-irradiation for highly sensitive detection of mercury ions. Issue 4 (April 2020)

• Record Type: Journal Article
• Authors: Ghanem, Ali; Al-Qassar Bani Al-Marjeh, Rama; Atassi, Yomen
• Is Part Of: Heliyon. Volume 6:Issue 4(2020)
• Publication Date: 2020-04
• Subjects: Analytical chemistry -- Environmental science -- Carbon dots -- Hg2+ detection -- Photoluminescence -- pH sensing -- LOD; Research -- Periodicals; Medical sciences -- Periodicals; Natural history -- Periodicals; Social sciences -- Periodicals; Earth sciences -- Periodicals; Physical sciences -- Periodicals; 507.2
• DOI: 10.1016/j.heliyon.2020.e03750
• Languages: English
• ISSNs: 2405-8440

Abstract

Abstract: In this paper, new nitrogen doped carbon dots with a high quantum yield and novel optical properties were synthesized by a simple and fast one step microwave-assisted synthesis. Citric acid monohydrate was used as a carbon source and 2, 2-dimethyl-1, 3-propanediamine as nitrogen source. The prepared N-CDs were characterized by Fourier transform infrared, Raman, UV-visible and photoluminescence spectroscopies. Transmission electron microscope (TEM) images revealed that the N-CDs have distinctive flake-shape morphology. The N-CDs exhibit bright blue luminescence and quenching response towards Hg 2+ ions. The quenching sensitivity was investigated. The results indicate a limit of detection as low as 7.63 nM and a linear relationship over the range 0–4.2 μM. In addition, the prepared N-CDs were tested as sensor for pH in the range from 1 to 7. Abstract : Analytical chemistry; Environmental Science; carbon dots; Hg 2+ detection; Photoluminescence; pH sensing; LOD