Method for preparing sulfur nitrogen doped carbon point with high fluorescence quantum yield
A fluorescence quantum yield, co-doping technology, applied in chemical instruments and methods, nano-optics, luminescent materials, etc., can solve the problems of few literature reports and achieve the effect of convenient, quick and reproducible
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Embodiment 1
[0017] 0.15g of pyrithione hydrochloride was added to a mass concentration of 0 . 5mg / mL GO suspension in 10mL, then put the formed mixture in a 25mL hydrothermal reaction kettle, heat at 100°C for 5h, then cool to room temperature naturally, centrifuge the reaction product to separate the solid and liquid to obtain light yellow solution, and then filtered through microporous membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large carbon nanoparticles to obtain an aqueous solution of sulfur and nitrogen co-doped carbon dots; (2) the sulfur and nitrogen obtained in step (1) The co-doped carbon dot aqueous solution was concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to obtain sulfur-nitrogen co-doped carbon dots with high fluorescence quantum yield.
Embodiment 2
[0019] 0.15g of pyrithione hydrochloride was added to a mass concentration of 0 . 5mg / mL GO suspension in 10mL, then put the formed mixture in a 25mL hydrothermal reaction kettle, heat at 100°C for 10h, then naturally cool to room temperature, centrifuge the reaction product to separate the solid and liquid to obtain light yellow solution, and then filtered through microporous membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large carbon nanoparticles to obtain an aqueous solution of sulfur and nitrogen co-doped carbon dots; (2) the sulfur and nitrogen obtained in step (1) The co-doped carbon dot aqueous solution was concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to obtain sulfur-nitrogen co-doped carbon dots with high fluorescence quantum yield.
Embodiment 3
[0021] 0.15g of pyrithione hydrochloride was added to a mass concentration of 0 . 5mg / mL GO suspension in 10mL, then put the formed mixture in a 25mL hydrothermal reaction kettle, heat at 100°C for 20h, then cool to room temperature naturally, centrifuge the reaction product to separate the solid and liquid to obtain light yellow solution, and then filtered through microporous membranes with a pore size of 0.45 μm and 0.22 μm in turn to remove large carbon nanoparticles to obtain an aqueous solution of sulfur and nitrogen co-doped carbon dots; (2) the sulfur and nitrogen obtained in step (1) The co-doped carbon dot aqueous solution was concentrated by rotary evaporation, and then freeze-dried by a lyophilizer to obtain sulfur-nitrogen co-doped carbon dots with high fluorescence quantum yield.
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