Preparation method and application of a gold nanostar/molybdenum disulfide composite material
A molybdenum disulfide and composite material technology, applied in nanotechnology, phototherapy, radiotherapy, etc., can solve the problems of complex experimental process and uncontrollable density, and achieve the effect of easy operation, huge application potential, and low impurity content.
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Embodiment 1
[0039] Example 1 Preparation of molybdenum disulfide seed solution
[0040] (1) Add 400 μL of polyvinylpyrrolidone with a mass fraction of 5% to 4 mL of a molybdenum disulfide solution with a mass concentration of 0.025 mg / mL, stir and mix well; prepare four sets of molybdenum disulfide solutions according to the same composition ratio for later use, respectively: A, B, C, D;
[0041] (2) Under vigorous stirring, take 50 μL, 110 μL, 150 μL, and 200 μL of 10 mM chloroauric acid solution, and add them dropwise to the four groups of mixed colloid solutions prepared in step (1), stir at room temperature for 10 minutes, and then React at 60°C for 5 minutes;
[0042] (3) After the reaction in step (2), the above four groups of molybdenum disulfide seed solutions were concentrated by centrifugal purification method, wherein the parameters of centrifugal purification were 6000 rpm, 10 min, and the finally obtained molybdenum disulfide seeds were dispersed in ultrapure water and fixed...
Embodiment 2
[0044] Example 2 Preparation of gold nanostar / molybdenum disulfide composite material by in-situ growth method
[0045] Take the molybdenum disulfide seed solution prepared when the amount of chloroauric acid in Example 1 is 110 μL, prepare the gold nanostar / molybdenum disulfide composite material:
[0046] (1) Add 100 μL of molybdenum disulfide seed solution into 5 mL of ultrapure water, and mix well;
[0047] (2) Add 5 μL of 1M hydrochloric acid and 50 μL of 100 mM ascorbic acid to the mixed colloid solution prepared in step (1) in sequence, stir and mix well, and prepare four groups according to the same composition ratio, namely E, F, G, and H;
[0048] (3) While vigorously stirring, take 50 μL, 100 μL, 200 μL, 300 μL of 1 mM silver nitrate solution and 125 μL of 10 mM chloroauric acid solution and add them to the four mixed solutions obtained in step (2) at the same time, and react for 30 seconds Finish;
[0049] (4) After the reaction in step (3), the four groups of so...
Embodiment 3
[0051] Example 3 Preparation of gold nanostar / molybdenum disulfide composite material by in-situ growth method
[0052] Under the condition that the amount of silver nitrate in Example 2 is 200 μL, under different concentrations of chloroauric acid, the preparation method of the gold nanostar / molybdenum disulfide composite material with adjustable gold nanostar morphology is as follows:
[0053] (1) Add 100 μL of gold seed solution to 5 mL of ultrapure water, and stir to mix;
[0054] (2) Add 5 μL of 1M hydrochloric acid and 50 μL of 100 mM ascorbic acid to the mixed colloid solution prepared in step (1) in turn, stir and mix well, and prepare four groups according to the same composition ratio, namely Q, R, S, T;
[0055] (3) While vigorously stirring, take 200μL of 1mM silver nitrate solution and 10mM chloroauric acid solution with volumes of 50μL, 75μL, 100μL, and 125μL and add them to the four groups of mixed solutions obtained in step (2) at the same time, and react for 3...
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