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中文摘要：
以柠檬酸为碳源,采用一步熔融法制备了石墨烯量子点,通过红外光谱、紫外-可见吸收光谱、荧光光谱对其光学性能进行表征,同时考察了石墨烯量子点耐光漂白能力和抗盐性.该石墨烯量子点可应用于对苯二酚的检测,其荧光强度与对苯二酚浓度成良好的线性关系（R2=0.979）,方法的检测限为3.1nmol·L^-1,线性范围为1.0×10^-7-5.0×10^-6 mol·L^-1.
英文摘要：
With citric acid as carbon source,graphene quantum dots was prepared by one-step melting method.The spectral properties of the graphene quantum dots was characterized by FTIR,UV-visible absorption spectra and fluorescence spectra.In addition,its ability of light bleaching and salt resistance were investigated.Then,the graphene quantum dots was used for the detection of hydroquinone by a fluorescent sensor.The fluorescence intensity of graphene quantum dots and the concentration of hydroquinone exhibited a good linear relationship（R2=0.979） with a wide concentrations range of 1.0×10^-7-5.0×10^-6 mol·L^-1 as well as the limit of detection was calculated to be 3.1nmol·L^-1.
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