Method for preparing fluorescent carbon quantum dots based on metformin as precursor
A technology of carbon quantum dots and metformin is applied in the field of preparation of fluorescent carbon quantum dots, which can solve the problems of carbon quantum dots being difficult to widely apply and analyze, and achieve the effects of simple and convenient operation method, high yield and high fluorescence intensity.
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[0023] Example 1: This embodiment records a method for preparing fluorescent carbon quantum dots using metformin as a precursor. The method is a hydrothermal method, and the specific preparation steps are as follows:
[0024] Step 1. Weigh 2mmol of metformin hydrochloride and 1 mmol of dithiodibenzoic acid respectively, the molar ratio is 2:1, place them in 10mmol of acetic acid, fully stir, and transfer to a polytetrafluoroethylene-lined hydrothermal reaction kettle , reacted at 180 °C for 10 h, and cooled to room temperature.
[0025] In the polytetrafluoroethylene-lined hydrothermal reactor, the polytetrafluoroethylene lining has the characteristics of high temperature resistance, high pressure resistance, and acid and alkali resistance. Due to the use of hydrothermal method for preparation, the solvent is heated and vaporized during the hydrothermal process, resulting in an increase in the internal temperature of the reactor and a rise in air pressure, and acidic liquid ac...
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