Preparation method of aqueous phase non-toxic white light quantum with multilayer core-shell structure
A multi-layer core-shell structure and white light technology, which is applied in chemical instruments and methods, luminescent materials, and the use of gas discharge lamps, etc., can solve problems such as difficult spectrum adjustment and multi-layer quantum dot synthesis, and achieve good application prospects , low raw material price, good water solubility and stability
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[0016] The raw materials zinc nitrate, copper chloride, manganese chloride, thioacetamide, mercaptopropionic acid, sodium hydroxide, selenium powder and sodium borohydride used in the present invention are all analytical reagents. The solvent is high-purity deionized water. All instruments used in the experiment were rinsed three times with deionized water.
[0017] (1) Preparation of NaHSe: Dissolve 0.17g of sodium borohydride in 3ml of deionized water, and quickly add 0.16g of selenium powder. The reaction vessel is sealed with a rubber stopper, which has a small pinhole to communicate with the outside world so as to release the hydrogen generated by the reaction. During the reaction, the system was cooled with an ice-water bath. After about 4 hours, the black selenium powder disappeared and white sodium borate crystals were produced. The clear solution in the upper layer was NaHSe with a concentration of 0.667mol / L. Its reaction equation:
[0018] 4NaBH 4 + 2Se + 7H 2...
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