Amorphous titanium dioxide-coated CdSe quantum dots as well as preparation and application thereof
A technology of titanium dioxide and quantum dots, which is applied in chemical instruments and methods, other chemical processes, chemical/physical processes, etc., can solve the problems of non-obvious photocatalytic performance of amorphous titanium dioxide, and achieve photocatalytic performance improvement, low cost, and adsorption The effect of performance improvement
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Embodiment 1
[0030] (1) Mix oleic acid and 1-octadecene with a volume ratio of 1:2, add 2.5mmol cadmium oxide to 50mL of the above-mentioned mixed solvent, and 2 Under protection, stir and dissolve at 120° C. until the solution is clear and transparent to form a 0.05 mmol / mL cadmium precursor solution.
[0031] (2) Dissolve 1 mmol of selenium powder in 20 mL of tri-n-octylphosphine (TOP), disperse and stir until uniform and clear to form a 0.05 mmol / mL selenium precursor solution. Mix the selenium precursor solution and the cadmium precursor solution with a volume ratio of 1:2, add the same volume of oleylamine solution as the selenium precursor solution, the concentration of the precursor mixed solution is 0.0375mmol / mL, mix evenly in the syringe, control Propelling speed is such that the reaction solution reacts in the polytetrafluoroethylene capillary for 2 seconds under heating in an oil bath at 200°C. Wash with acetone, centrifuge, the centrifugation speed is 5000r / min, and the centr...
Embodiment 2
[0034] (1) Mix oleic acid and 1-octadecene with a volume ratio of 1:10, add 50mmol cadmium oxide to 50mL of the above-mentioned mixed solvent, and 2 Under protection, stir and dissolve at 180° C. until the solution is clear and transparent to form a cadmium precursor solution of 1.0 mmol / mL.
[0035] (2) Dissolve 20mmol of selenium powder in 20mL of tri-n-octylphosphine (TOP), disperse and stir until uniform and clear to form a 1.0mmol / mL selenium precursor solution. Mix the selenium precursor solution and the cadmium precursor solution with a volume ratio of 1:10, add the same volume of oleylamine solution as the selenium precursor solution, the concentration of the precursor mixed solution is 0.917mmol / mL, mix evenly in the syringe, control Propelling speed is such that the reaction solution reacts for 100s in the polytetrafluoroethylene capillary tube under heating in an oil bath at 300°C. Wash with acetone, centrifuge, the centrifugation speed is 10000r / min, and the centr...
Embodiment 3
[0039] (1) Mix oleic acid and 1-octadecene with a volume ratio of 1:5, add 5mmol cadmium oxide to 50mL of the above-mentioned mixed solvent, and 2 Under protection, stir and dissolve at 150° C. until the solution is clear and transparent to form a 0.1 mmol / mL cadmium precursor solution.
[0040](2) Dissolve 2 mmol of selenium powder in 20 mL of tri-n-octylphosphine (TOP), disperse and stir until uniform and clear to form a 0.1 mmol / mL selenium precursor solution. Mix the selenium precursor solution and the cadmium precursor solution with a volume ratio of 1:5, add the same volume of oleylamine solution as the selenium precursor solution, the concentration of the precursor mixed solution is 0.857mmol / mL, mix evenly in the syringe, control Propelling speed is such that the reaction time of the reaction solution in the polytetrafluoroethylene capillary tube heated by an oil bath at 280°C is 50s. Wash with acetone, centrifuge, the centrifugation speed is 8000r / min, and the centri...
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