首次以中药材贝母为碳源,采用微波法一步合成新型荧光碳量子点。通过原料用量、微波功率和反应时间优化,获得了制备荧光碳量子点的最佳实验条件。同时通过透射电镜和X射线光电子能谱仪对荧光碳量子点进行了形貌及结构表征,通过荧光光谱和紫外-可见吸收光谱对荧光碳量子点进行了光学性能研究。结果表明:原料用量2g,微波功率800W,反应时间8min为合成荧光碳量子点最佳反应条件,制备得到的荧光碳量子点平均粒径5nm,最大激发波长310nm,最大荧光发射波长位于400nm处,最大紫外吸收波长280nm。
The new photoluminescent carbon dots were prepared by utilizing the Chinese medicinal material fritillaria as a carbon source via microwave method for the first time.The optimum experimental conditions for the preparation of carbon dots were obtained by optimizing the amount of raw materials,the microwave power and reaction time.At the same time,the morphology and structure of carbon dots were characterized by TEM and XPS image.The optical properties of carbon dots were studied by photoluminescent spectra and UV-Vis absorption spectra.The experimental results showed that the optimum reaction conditions were the amount of fritillaria 2g,the microwave power 800W,reaction time 8min.The average diameter of carbon dots was 5nm,the maximum excitation wavelength was 310nm,and the maximum emission wavelength was located at 400nm.The maximum UV-Vis absorption wavelength was 280nm.
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基金资助
四川省教育厅重点项目(18ZA0414);四川省教育厅一般项目(18ZB0216);四川文理学院特色植物开发研究专项项目(2018TZ001Y)
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