光致发光
石墨烯
量子点
去壳
透射电子显微镜
材料科学
猝灭(荧光)
紫外线
水热合成
量子产额
化学工程
光化学
荧光
热液循环
纳米技术
核化学
光电子学
化学
光学
物理
生物
工程类
植物
作者
Weixing Wang,Zhaofeng Wang,Jingjing Liu,Yikang Peng,Xiaoyuan Yu,Weixing Wang,Zhengguo Zhang,Luyi Sun
标识
DOI:10.1021/acs.iecr.8b00913
摘要
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 Fe3+ ions and thus can potentially be used for Fe3+ sensing.
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