Preparation method of gold/nitrogen-doped hollow carbon nanosphere core-shell material
A nitrogen-doped, hollow carbon technology, applied in the field of biomedical materials, can solve the problems of poor treatment effect, incurable cancer, toxic and side effects, etc., achieve good biocompatibility and photothermal stability, and improve photothermal conversion Efficiency, the effect of a simple design method
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Embodiment 1
[0035] (1) Preparation of PVP-modified gold sol: Take 30 mL of water in a 100 mL single-necked round-bottom flask and heat to boiling, add 150 mM HAuCl 4 100 μL of aqueous solution and 74 μL of 34 mM trisodium citrate aqueous solution were refluxed for 0.5 h at a stirring speed of 700 r / min. After the solution was cooled to room temperature, 5.86 mL of 1.28 mM PVP aqueous solution was added and stirred overnight.
[0036] Put the reacted solution in a centrifuge tube and centrifuge at 11800 r / min for 1 to 2 times, take out the supernatant with a dropper, and disperse the remaining solid-phase gold sol in 8 mL deionized water to obtain gold sol for later use.
[0037] (2) Au@SiO2 2 Preparation of spheres: Take 2 mL of gold sol and sonicate for 3 to 5 min at a power of 80 W, put 1 mL of ammonia water, 6 mL of deionized water, and 10 mL of ethanol into a 50 mL single-necked round-bottom flask. Stir at 700 r / min for 0.5 h. Finally, 0.5 mL TEOS was added, stirred at room temperatu...
Embodiment 2
[0041] (1) Preparation of PVP-modified gold sol: Take 30 mL of water in a 100 mL single-necked round-bottom flask and heat to boiling, add 150 mM HAuCl 4 100 μL of aqueous solution and 74 μL of 34 mM trisodium citrate aqueous solution were refluxed for 0.5 h at a stirring speed of 700 r / min. After the solution was cooled to room temperature, 5.86 mL of 1.28 mM PVP aqueous solution was added and stirred overnight.
[0042] Put the reacted solution in a centrifuge tube and centrifuge at 11800 r / min for 1-2 times, take out the supernatant with a dropper, and disperse the remaining solid-phase gold sol in 8 mL deionized water to obtain the gold sol for later use.
[0043] (2) Au@SiO2 2 Preparation of spheres: Take 2 mL of gold sol and sonicate for 3 to 5 min at a power of 80 W, put 1 mL of ammonia water, 6 mL of deionized water, and 10 mL of ethanol into a 50 mL single-necked round-bottom flask. Stir at 700 r / min for 0.5 h. Finally, 0.5 mL TEOS was added, stirred at room temper...
Embodiment 3
[0047] (1) Preparation of PVP-modified gold sol: Take 30 mL of water in a 100 mL single-necked round-bottom flask and heat to boiling, add 150 mM HAuCl 4 100 μL of aqueous solution and 74 μL of 34 mM trisodium citrate aqueous solution were refluxed for 0.5 h at a stirring speed of 600 r / min. After the solution was cooled to room temperature, 5.86 mL of 1.28 mM PVP aqueous solution was added and stirred overnight.
[0048] Put the reacted solution in a centrifuge tube and centrifuge at 11800 r / min for 1-2 times, take out the supernatant with a dropper, and disperse the remaining solid-phase gold sol in 8 mL deionized water to obtain the gold sol for later use.
[0049] (2) Au@SiO2 2 Preparation of spheres: Take 2 mL of gold sol and sonicate for 3 to 5 min at a power of 80 W, put 1 mL of ammonia water, 6 mL of deionized water, and 10 mL of ethanol into a 50 mL single-necked round-bottom flask. Stir at 600 r / min for 0.5 h. Finally, 0.5 mL TEOS was added, stirred at room temper...
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