Abstract

As a new zero-optic luminescent material, carbon quantum points are widely focused and sustained, and many researchers are trying to use simple and fast methods and stable, good carbon sources to be prepared with a good fluorescent properties of carbon quantum dots. In this paper, carbon quantum dots were synthesized by solvothermal method with vanillin as carbon source, and the effects of solvothermal temperature and time on the luminescence properties of carbon quantum dots were explored. Then, carbon quantum dots were characterized by X-ray diffraction analysis, transmission electron microscopy analysis, infrared spectrum analysis, fluorescence spectrum analysis. Research results showed that ethanol solvent with vanillin as a carbon source by solvothermal method could synthesize good water soluble carbon quantum dots with weak crystallization, and its size was about 10 nm. This carbon quantum dots had obvious excitation wavelength dependence and produce blue light, which had potential application value in ion fluorescence probe or cell labeling.

摘要

碳量子点作为一种新型的零光发光材料，受到广泛关注和持续关注，许多研究人员正试图通过简单快速的方法和稳定、良好的碳源来制备具有良好荧光性能的碳量子点。本文以香兰素为碳源，采用溶剂热法合成碳量子点，探讨了溶剂热温度和时间对碳量子点发光性质的影响。然后，通过X射线衍射分析、透射电子显微镜分析、红外光谱分析、荧光光谱分析对碳量子点进行了表征。研究结果表明，以香兰素为碳源的乙醇溶剂，通过溶剂热法可以合成出水溶性好的、结晶较弱的碳量子点，它的大小约为 10 nm。这种碳量子点具有明显的激发波长依赖性并产生蓝光，在离子荧光探针或细胞标记方面具有潜在的应用价值。