Dynamic photostimulatory response phosphorescent material based on gelatin as well as preparation method and application of dynamic photostimulatory response phosphorescent material
A phosphorescent material and gelatin technology, applied in the field of phosphorescent materials, can solve the problems of complex preparation process, short emission life and high cost, and achieve the effects of high photoactivation efficiency, simplified preparation process and low cost
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Embodiment 1
[0033] Dissolve 2g of anhydrous citric acid and 1g of urea in 50mL of ultrapure water, and stir to dissolve into a transparent solution. Then, the solution was transferred into a Teflon-lined autoclave (100 mL) and heated at 230 °C for 8 h. The dark brown solution obtained after the reaction is finished, the solution emits light blue fluorescence under the irradiation of ultraviolet light (365 nm). The dark brown solution was then centrifuged at high speed (10000 rad / min) for 20 min to remove large or agglomerated particles. Finally, carbon dots (CDs) were obtained by freeze-drying. The carbon dots were dissolved in deionized water to prepare an aqueous solution containing carbon dots at a concentration of 4 mg / ml.
Embodiment 2
[0035] 2 g of gelatin was dissolved in 10 mL of deionized water at 70 °C with stirring. Then 1 mL of the carbon dot-containing aqueous solution prepared in Example 1 was quickly added to the aqueous gelatin solution. The solution was further stirred for 30 min to ensure uniform dispersion. Then, the mixed solution was poured into a petri dish, and dried at 100 °C for 2 h to obtain a brownish yellow film, that is, a carbon dot / gelatin composite film.
Embodiment 3-5
[0037] The preparation method is the same as that in Example 2, except that the volumes of the aqueous solution containing carbon dots prepared in Example 1 are different, which are 1.4 mL, 1.8 mL, and 2 mL, respectively. Carbon dot / gelatin composite films with different carbon dot contents were obtained.
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