热解柠檬酸制备石墨烯量子点及其光学性质研究

Citrate pyrolysis and synthesis of graphene quantum dots and study on optical property

通过热解柠檬酸制备发蓝光的石墨烯量子点(GQDs),并进一步水热处理得到蓝绿色荧光量子点(gGQDs)。通过紫外-可见吸收光谱、荧光光谱、傅里叶变换红外光谱、X射线光电子能谱和X射线衍射对制备的GQDs的结构和光学性质进行了表征和测试;同时,讨论了不同裂解温度和裂解时间及水热处理过程的温度和时间对GQDs荧光性能的影响。

The blue luminescent graphene quantum dots（b-GQDs）were prepared by pyrolysis of citric acid and further obtained green luminescent graphene quantum dots（g-GQDs）under hydrothermal treatment.The structural and optical properties were measured by fourier transform infrared spectroscopy（FT-IR）,photoluminescence spectra（PL）,UVvisible spectroscopy（UV-Vis）,X-ray photoelectron spectroscopy（XPS）and X-ray diffraction（XRD）.What＇s more,the fluorescence properties of GQDs were discussed under different pyrolysis temperature and time as well as hydrothermal temperature and time.