A kind of metal sulfide nanomaterial and its preparation method and application
A technology of metal sulfide and nanomaterials, applied in the field of nanomaterials, can solve the problems of side effects, insufficient penetration depth of irradiation, etc., and achieve the effects of reducing absorption, optimizing tumor treatment effect, and improving efficiency
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[0042] The present invention also discloses a method for preparing the above-mentioned metal sulfide nanomaterial: the method includes the following steps:
[0043]Step 1, using bismuth salt as a precursor, adding an organic solvent, heating and reacting for a period of time to obtain a solution; in this step, the bismuth salt is bismuth nitrate, bismuth chloride or bismuth dodecanoate; the organic solvent is oleic acid One or more of oleylamine and octadecene; the molar concentration of bismuth element in the solution obtained by this step is 0.05~0.5mol / L, for example, 0.05mol / L, 0.1mol / L, 0.2mol / L, 0.3mol / L, 0.4mol / L or 0.5mol / L; the heating temperature in this step is 100-200°C, such as 100°C, 120°C, 140°C, 170°C, 180°C or 200°C; The reaction time in the step is 10 to 30 minutes, such as 10 minutes, 20 minutes or 30 minutes;
[0044] Step 2, add sulfur powder dissolved in oleylamine to the solution obtained in step 1, continue heating and reacting for a certain period of...
Embodiment 1
[0049] (1) 3mmol of BiCl 3 Add it into a 100mL three-neck round bottom flask, then add 10mL of oleic acid and 10mL of oleylamine, then add a stirring bar to stir, raise the temperature to 170°C and react for 30min to obtain the reaction system A;
[0050] (2) Dissolving 10 mmol of elemental sulfur in 5 mL of oleylamine and ultrasonically dissolving it sufficiently to obtain solution I;
[0051] (3) Quickly add solution I to reaction system A, and continue to react at 170° C. for 10 minutes to obtain reaction system B;
[0052] (4) Stop the reaction. After the reaction system B is cooled to room temperature, transfer system B to a centrifuge tube, centrifuge at 8000 rpm for 3 minutes, and then take the precipitate and resuspend it in 20 mL of cyclohexane to prepare solution II ;
[0053] (5) Take 10 mL of solution II, add 100 μL of Tween-20, and then add 30 mL of deionized water. After ultrasonication for 30 minutes, heat the water bath to 70 ° C and stir until the solution i...
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