Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Feb 15;4(2):3449-3457.
doi: 10.1021/acsomega.8b03674. eCollection 2019 Feb 28.

Hydrothermally Green Synthesized Nitrogen-Doped Carbon Dots from Phyllanthus emblica and Their Catalytic Ability in the Detoxification of Textile Effluents

Velusamy Arul  1 , Mathur Gopalakrishnan Sethuraman  1
Affiliations

Hydrothermally Green Synthesized Nitrogen-Doped Carbon Dots from Phyllanthus emblica and Their Catalytic Ability in the Detoxification of Textile Effluents

Velusamy Arul et al. ACS Omega. .

Abstract

A facile method for reduction of textile effluents (TEff) using fluorescent nitrogen-doped carbon dots (N-CDs) has been developed and reported here. The synthesis of N-CDs was done by a hydrothermal carbonization method using the aqueous extract of Phyllanthus emblica (P. emblica) fruit as a carbon source and aq NH3 as a nitrogen dopant. Various analytical techniques have been employed for the characterization of N-CDs. The size of the synthesized N-CDs was found to be 4.08 nm, which was confirmed by high-resolution transmission electron microscopy analysis. The graphitic character of the N-CDs was studied by using selected area energy diffraction pattern and Raman spectroscopy studies. Under the excitation of 320 nm, an intense blue fluorescence was emitted by N-CDs of around 400 nm. From the obtained results of energy-dispersive spectrometry, EDAX, and Fourier transform infrared studies, it was confirmed that nitrogen was doped over the N-CD surface. Finally, the catalytic ability of NaBH4 was found to be enhanced remarkably by the synthesized CDs in the detoxification of TEff.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
(a) Absorption spectra of the P. emblica extract and N-CDs and (b) corresponding PL excitation spectrum of N-CDs.
Figure 2
Figure 2
PL emission spectra of N-CDs at various excitation wavelengths (a) from 270 to 320 nm; and (b) from 320 to 400 nm.
Figure 3
Figure 3
HR-TEM image of N-CDs (a) at the 20 nm scale; (b) particle size graph; (c) HR-TEM image of N-CDs at the 2 nm scale; and (d) SAED outline for N-CDs.
Figure 4
Figure 4
Energy-dispersive spectrum of N-CDs.
Figure 5
Figure 5
EDAX spectrum of N-CDs.
Figure 6
Figure 6
FT-IR spectra of N-CDs and P. emblica fruit extract.
Figure 7
Figure 7
XRD pattern of N-CDs.
Figure 8
Figure 8
Raman spectrum for synthesized N-CDs.
Figure 9
Figure 9
(a) XPS spectrum of the synthesized N-CDs (full survey scan) and deconvoluted high-resolution XPS spectrum of (b) C 1s, (c) N 1s, and (d) O 1s.
Figure 10
Figure 10
UV–visible absorption spectra of the detoxification of TEff using NaBH4 (a) in the absence of N-CDs and (b) in the presence of N-CDs and (c) inset of Figure 11b.
Figure 11
Figure 11
Graphical representation of the mechanism of formation of N-CDs.
Figure 12
Figure 12
Graphical representation of the mechanism for the detoxification of TEff using N-CDs.
See this image and copyright information in PMC

References

    1. Lim S. Y.; Shen W.; Gao Z. Carbon quantum dots and their applications. Chem. Soc. Rev. 2015, 44, 362–381. 10.1039/c4cs00269e. - DOI - PubMed
    1. Atchudan R.; Edison T. N. J. I.; Sethuraman M. G.; Lee Y. R. Efficient synthesis of highly fluorescent nitrogen-doped carbon dots for cell imaging using unripe fruit extract of Prunus mume. Appl. Surf. Sci. 2016, 384, 432–441. 10.1016/j.apsusc.2016.05.054. - DOI
    1. Zhang J.; Yu S.-H. Carbon dots: large-scale synthesis, sensing, and bioimaging. Mater. Today 2016, 19, 382–393. 10.1016/j.mattod.2015.11.008. - DOI
    1. Wang Y.; Hu A. Carbon quantum dots: synthesis, properties and applications. J. Mater. Chem. C 2014, 2, 6921–6939. 10.1039/c4tc00988f. - DOI
    1. Zhou M.; Zhou Z.; Gong A.; Zhang Y.; Li Q. Synthesis of highly photoluminescent carbon dots via citric acid and Tris for iron (III) ions sensors and bioimaging. Talanta 2015, 143, 107–113. 10.1016/j.talanta.2015.04.015. - DOI - PubMed

LinkOut - more resources