Preparation method of ZnSe-to-Cu quantum point

Abstract

The invention belongs to the technical field of the preparation method of a nano material, in particular to a preparation method of a ZnSe-to-Cu quantum point. The preparation method comprises the following steps that: (1), under the protection of inert gases, Se powder and sodium borohydride are dissolved in distilled water, the amount of substance of the sodium borohydride is equal to or greater than that of the Se powder, the mixture is heated to be completely dissolved, and a Se solution with the Se content of 0.01 to 0.75mol / L is manufactured; (2), zinc acetate and copper acetate are dissolved in the distilled water, the mole number of copper ions does not exceed 15% of that of zinc ions, thioglycollic acid is added into the mixture, the pH is regulated to 8 to 13, and a Zn solution with the Zn content of 0.01 to 0.1mol / L is manufactured; and (3), the manufactured Se solution is injected into the manufactured Zn solution, the mixture reacts for 1 to 5 hours in oil bath at 90 to 150 DEG C and is cooled to room temperature, ZnSe-to-Cu quantum point water solution is obtained, then isopropanol is added into the ZnSe-to-Cu quantum point water solution, and a ZnSe-to-Cu quantum point is obtained by centrifugation and separation. The invention has the beneficial effects that cheap raw materials are adopted to substitute an expensive and dangerous organic metal precursor, which is green and environment-friendly, and the preparation cost is reduced; and the water solution is used as a reaction solvent, thus the reaction temperature is reduced and the operation is simple and safe.

Description

technical field [0001] The invention relates to a preparation method of a nano-luminescent material, in particular to a preparation method of ZnSe:Cu quantum dots. Background technique [0002] Since Ni et al. reported on CdSe quantum dots in Science in 1998, the application of II-VI quantum dots as fluorescent probes in the field of life medicine has greatly attracted the attention of scholars at home and abroad. At present, Cd-containing quantum dots (CdSe, CdTe, CdS, etc.) are the most used, but they cannot be widely used due to their biological toxicity; chalcogenides (ZnS, ZnSe, etc.) have become a research hotspot due to their low toxicity. , but its pure compound has the disadvantages of low luminous efficiency and poor stability, which requires scholars to modify it to improve luminous efficiency. At present, the common method is doping transition metal ions, which can not only overcome the problem of biological toxicity, but also have excellent luminescent properti...

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Problems solved by technology

D.J.Norris et al. (Nano Lett.2001,1,1:3-7.) based on the synthesis of ZnSe quantum dots by Margaret A et al. (J.Phys.Chem.B.1998,102,19:3655-3657. ), using dimethyl manganese as a dopant to obtain ZnSe:Mn quantum dots with good monodispersity and high fluorescence performance; however, TOP is not stable as a raw material, the price is high, and the reaction needs to be performed in a high temperature environment under strict conditions

In 2007, Peng et al. proposed to use a green synthesis method to synthesize ZnSe:Mn quantum dots with high quantum yield and color controllable by nucleation and doping (J.AM.CHEM.SOC.2007, 129, 3339-3347.) ; But the synthesis temperature is still around 300°C, the operation is dangerous

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