Preparation method and application of blue-fluorescence carbon quantum dots

The invention discloses a preparation method and application of blue-fluorescence carbon quantum dots, and belongs to the technical field of carbon quantum dots. Citric acid and hyaluronic acid are dissolved into water to obtain a mixed solution A; the mixed solution A is subjected to a hydrothermal reaction for 4-12 hours to obtain an HA-CDs solution; the HA-CDs solution is dialysed by using a dialysis membrane and then centrifuged, after standing, supernatant liquid is taken to obtain the blue-fluorescence carbon quantum dots. The hyaluronic acid and the citric acid are used as synthesizingraw materials, the novel carbon quantum dots high in fluorescence intensity is synthesized in one step, high-selectivity detection of folic acid can be achieved, and the carbon quantum dots which areeasily synthesized are applied in biological recognition. 本发明公开了一种蓝色荧光碳量子点的制备方法及应用，属于碳量子点技术领域。本发明将柠檬酸和透明质酸溶解到水中得到混合溶液A；将混合溶液A水热反应4~12h得到HA-CDs溶液；将HA-CDs溶液经透析膜透析，再离心处理，然后静置取上清液即得蓝色荧光碳量子点。本发明以透明质酸和柠檬酸为合成原料，一步合成高荧光强度的新型碳量子点，并且可以实