A kind of preparation method of tungsten oxide quantum dot material
A technology of tungsten oxide quantum dots and tungsten sources, applied in chemical instruments and methods, luminescent materials, nanotechnology, etc., can solve problems such as difficult industrial production, difficult control of reaction process, and low concentration, and achieve simple and efficient synthesis methods, Effect of narrow particle size distribution and avoidance of negative effects
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[0032] The following schematically illustrates the preparation method of the present invention.
[0033] First, a tungsten source is added to a solvent containing a polyol. The tungsten source used can be at least one of tungstic acid, ammonium tungstate, ammonium metatungstate and ammonium paratungstate. Described polyhydric alcohol can be pentaerythritol, propylene glycol, xylitol, sorbitol, ethylene glycol, glycerol, 2-methyl-1,3-propanediol, diethylene glycol, trihydroxyethane, butanediol, at least one of trihydroxypropane. The solvent containing polyol may also include water, wherein the volume ratio of polyol to water may be 1:(2-4). Pentaerythritol, xylitol, sorbitol, trihydroxyethane, and trihydroxypropane are solid at room temperature. They need to be dissolved in water to form a polyol aqueous solution, and then the tungsten source is added.
[0034] In the above preparation method, the tungsten oxygen bond in the tungsten source in step A forms a bond with the hy...
Embodiment 1
[0044] A tungsten oxide quantum dot material and a preparation method thereof, comprising the following steps:
[0045] A. First, add 0.05mol ammonium tungstate to 100mL diethylene glycol, and heat at 100°C for 1.5h under constant stirring at 400r / min. Ammonium tungstate decomposes in the diethylene glycol solvent to form tungsten oxide crystals The nucleus, the tungsten-oxygen bond forms a bond with the hydroxyl group on diethylene glycol, and the reaction precursor is obtained after fully reacting and mixing;
[0046] B. Then put the reaction precursor obtained in step A in a reactor with a stirring function. The total volume of the reactor is 200mL, react at 200°C and 400r / min for 10h, and cool down to room temperature to obtain tungsten oxide Diethylene glycol solution of quantum dots.
[0047] The obtained tungsten oxide quantum dot diethylene glycol solution was placed in a dialysis bag (molecular cut-off of 8000), put into water for dialysis for 4 hours, and the soluti...
Embodiment 2
[0050] A tungsten oxide quantum dot material and a preparation method thereof, comprising the following steps:
[0051] A. First, add 0.07mol ammonium metatungstate to 100mLmL glycerol, heat at 120°C for 1h under constant stirring at 400r / min, and get the reaction precursor after fully reacting and mixing;
[0052] B. Then put the reaction precursor obtained in step A in a reactor with a stirring function. The total volume of the reactor is 200mL, react at 180°C and 400r / min for 20h, and cool down to room temperature to obtain tungsten oxide Glycerol solution of quantum dots.
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