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One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe3+ Sensing
journal contribution
posted on 2018-06-18, 00:00 authored by Weilin Wang, Zhaofeng Wang, Jingjing Liu, Yikang Peng, Xiaoyuan Yu, Weixing Wang, Zhengguo Zhang, Luyi SunIn this work, graphene quantum dots
(GQDs) with an average size
of 3.9 nm were synthesized using rice husk biomass as the raw material
via a facile one-step one-pot hydrothermal method. The size and morphology
of the rice husk-derived GQDs were characterized by transmission electron
microscopy and atomic force microscopy. The GQDs exhibit bright blue
photoluminescence under 365 nm ultraviolet irradiation and can be
well dispersed in water. The GQDs reach the strongest photoluminescence
excitation intensity at ca. 360 nm under an emission wavelength of
466 nm, suggesting that the GQDs were oxidized with oxygenous groups
attached. The quenching tests showed that the synthesized GQDs were
highly and selectively sensitive toward Fe3+ ions and thus
can potentially be used for Fe3+ sensing.
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transmission electron microscopy365 nmoxygenous groupsphotoluminescence excitation intensitygraphene quantum dotsrice husk-derived GQDs360 nmone-pot hydrothermal methodquenching testsFe466 nmGQDs exhibitGraphene Quantum DotsRice Husksforce microscopyrice husk biomassOne-Pot Facile Synthesisemission wavelength3.9 nm
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