Carboxyl-rich g-C^sub 3^N^sub 4^ nanoparticles: Synthesis, characterization and their application for selective fluorescence sensing of Hg^sub 2+^ and Fe^sub 3+^ in aqueous media

A new method has been introduced for synthesizing of carboxyl-rich g-C3N4 nanoparticles through a facile procedure from g-C3N4 nanosheets prepared by one-pot thermal polymerization of dicyandiamide under nitrogen atmosphere. The formation of these nanosheets was confirmed by the AFM, XRD, FESEM and...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2017-04, Vol.242, p.244
Main Authors: Shiravand, Ghasem, Badiei, Alireza, Ziarani, Ghodsi Mohammadi
Format: Article
Language:English
Subjects:
Carbon nitride
Diffraction
Ferric ions
Fluorescence
Fourier transforms
Mercury (metal)
Nanoparticles
Nanostructure
Nitrogen
Oxidation
Polymerization
Reagents
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Summary:A new method has been introduced for synthesizing of carboxyl-rich g-C3N4 nanoparticles through a facile procedure from g-C3N4 nanosheets prepared by one-pot thermal polymerization of dicyandiamide under nitrogen atmosphere. The formation of these nanosheets was confirmed by the AFM, XRD, FESEM and FTIR analyses. These nanosheets subsequently were transformed to carboxyl-rich nano structures through hydrothermal oxidation and were characterized by XRD, AFM, DRS, FESEM, Zeta-potential and FTIR. AFM studies revealed that the thickness and lateral size of these nano structures were 6 and 35–50 nm, respectively. In the present work, carboxyl-rich g-C3N4 was used as a selective sensor for detection of Hg2+ and Fe3+ which showed 12 and 190 nM detection limits, respectively. In addition, CN− was added as a discriminative agent to the aqueous media of these ions that enhanced and quenched PL intensities of Hg2+ and Fe3+, respectively.
ISSN:0925-4005
1873-3077