کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1231044 1495200 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Detection of Ag+ using graphite carbon nitride nanosheets based on fluorescence quenching
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Detection of Ag+ using graphite carbon nitride nanosheets based on fluorescence quenching
چکیده انگلیسی


• A fluorescence probe with graphite carbon nitride nanosheets for Ag+ is fabricated.
• The proposed method exhibits high sensitivity, short analysis time and wide linear range.
• The quenching mechanism is briefly discussed.

The graphite carbon nitride (g-C3N4) nanosheets were synthesized and applied for the detection of Ag+ ion in aqueous solutions. Transmission electron microscopy, Fourier infrared spectroscopy, x-ray diffraction, ultraviolet/visible and photoluminescence spectroscopy were used for characterization of g-C3N4 nanosheets. The fluorescence intensity of g-C3N4 nanosheets decreases with the increase in the concentration of Ag+. The fluorescence probe can be applied for detection of Ag+. The results show that it has high selectivity to Ag+ and exhibits a good linearity over the concentration range 0.020–2.0 μM with a detection limit of 27 nM. Most cations do not have any interference on the detection of Ag+. The quenching process is assessed and discussed. Finally, the g-C3N4 nanosheets have been successfully used for the detection of Ag+ in real water samples. The recoveries of spiked water samples are > 97%.

Graphite carbon nitride nanosheets (g-C3N4 nanosheets) were successfully synthesized by an ultrasonic exfoliation method from bulk g-C3N4 in aqueous medium. The g-C3N4 nanosheets is seriously quenched by Ag+. The fluorescence probe can be applied for detection of Ag+.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 169, 5 December 2016, Pages 122–127
نویسندگان
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