Hydrothermal method for preparing water-soluble graphene quantum dots
A graphene quantum dot, water-soluble technology, applied in nanotechnology and other directions, can solve the problems of no semiconductor properties, difficult to open energy bands, difficult to modulate optical and electrical properties, etc., to achieve easy mass production, process environmental protection, raw material source cheap effect
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Embodiment 1
[0023] Embodiment 1: prepare 0.5M glucose aqueous solution, add 40ml solution in the polytetrafluoroethylene lining container of hydrothermal reactor, close the lid to form airtight space, put reactor into the furnace of 190 ℃, heat 120 minutes, That is, graphene quantum dots with an average size of 2.3 nm were obtained.
Embodiment 2
[0024] Example 2: prepare 0.01M sucrose aqueous solution, take 40ml of the solution in the reactor, close the lid tightly to form a closed space, put the reactor into a furnace at 220°C, and heat for 600 minutes. Graphene quantum dots with an average size of 4.3 nm were obtained.
Embodiment 3
[0025] Example 3: Prepare a 1.0 M fructose aqueous solution, put a certain volume of the solution in a reactor, close the lid tightly to form a closed space, put the reactor into a furnace at 150° C., and heat for 120 minutes. Graphene quantum dots with an average size of 3.8 nm were obtained.
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