Cerium(III) Ion Sensing Based on Graphene Quantum Dots Fluorescent Turn-Off

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• 作者：Foad Salehnia ; Farnoush Faridbod ; Amin Shiralizadeh Dezfuli…
• 关键词：Graphene quantum dots ; Cerium ions ; Fluorescence quenching ; Nano ; chemosensor
• 刊名：Journal of Fluorescence
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：331-338
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine, general; Biological and Medical Physics, Biophysics; Biotechnology; Biochemistry, general; Analytical Chemistry;
• 出版者：Springer US
• ISSN：1573-4994
• 卷排序：27

文摘

In this work, graphene quantum dots (GQDs) was synthesized through hydrothermal method and used as a photoluminescent bulk nano-chemosensor for detection of Ce3+ ion in the aqueous solution. The synthesized GQD was characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-Visible absorption and fluorescence emission spectroscopy. The sheet diameters of the synthesized GQDs were mainly distributed in the range of 15–20 nm. The interactions of GQDs with common cations and lanthanide ions were studied by fluorescence spectroscopy. Among the tested cations, Ce3+ ions was able to quench the fluorescence emission intensity of the GQD selectively. This quenching can be attributed to a redox mechanism between Ce3+ ion on the GQDs surface.