10.1021/acs.iecr.8b00913.s001 Weilin Wang Weilin Wang Zhaofeng Wang Zhaofeng Wang Jingjing Liu Jingjing Liu Yikang Peng Yikang Peng Xiaoyuan Yu Xiaoyuan Yu Weixing Wang Weixing Wang Zhengguo Zhang Zhengguo Zhang Luyi Sun Luyi Sun One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe<sup>3+</sup> Sensing American Chemical Society 2018 transmission electron microscopy 365 nm oxygenous groups photoluminescence excitation intensity graphene quantum dots rice husk-derived GQDs 360 nm one-pot hydrothermal method quenching tests Fe 466 nm GQDs exhibit Graphene Quantum Dots Rice Husks force microscopy rice husk biomass One-Pot Facile Synthesis emission wavelength 3.9 nm 2018-06-18 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/One-Pot_Facile_Synthesis_of_Graphene_Quantum_Dots_from_Rice_Husks_for_Fe_sup_3_sup_Sensing/6727964 In 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 Fe<sup>3+</sup> ions and thus can potentially be used for Fe<sup>3+</sup> sensing.