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利用水热反应釜的条件,使碳量子点的含氧基团与氨水反应,实现了碳量子点的表面氨基化。制备的氨基化碳量子点尺寸分布均匀,总的含氮量受反应温度影响。实验结果表明:氨基化后的碳量子点荧光发射性质明显优于未氨基化的碳量子点;氨基化的氮源及其氮源加入反应过程中的顺序均会影响碳量子点的荧光发射效率。通过实验设计,确定出了氨基化碳量子点的最佳制备条件,从而为碳量子点的光学性质调控及应用奠定了技术支持。
Utilizing the conditions of the hydrothermal reactor, the oxygen-containing groups of the carbon quantum dots are reacted with ammonia to realize the surface amination of the carbon quantum dots. The size distribution of the prepared carbonized carbon dots is uniform, and the total nitrogen content is affected by the reaction temperature. The experimental results show that the fluorescence emission properties of the carbon quantum dots after amination are obviously better than that of the un-aminated carbon quantum dots. The order of the amination nitrogen source and its nitrogen source into the reaction process will affect the fluorescence emission efficiency of carbon quantum dots . Through the experimental design, the optimal preparation conditions of amino carbon quantum dots were determined, which laid the technical support for the control and application of optical properties of carbon quantum dots.