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Method for preparing pure-phase monodisperse ZnS nanocrystalline by using diethylene glycol serving as solvent

A diethylene glycol and nanocrystal technology, applied in the field of nanomaterials, can solve problems such as poor dispersibility, and achieve the effects of low preparation cost and simple procedure and equipment

Inactive Publication Date: 2013-02-13
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor dispersion of ZnS nanomaterials prepared in the prior art and mostly using toxic substances as solvents, to provide a solution chemical method, which is synthesized without any impurities by using green and environmentally friendly diethylene glycol as a solvent. phase and well-dispersed sphalerite ZnS nanocrystals

Method used

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  • Method for preparing pure-phase monodisperse ZnS nanocrystalline by using diethylene glycol serving as solvent
  • Method for preparing pure-phase monodisperse ZnS nanocrystalline by using diethylene glycol serving as solvent
  • Method for preparing pure-phase monodisperse ZnS nanocrystalline by using diethylene glycol serving as solvent

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Embodiment Construction

[0021] The raw materials used in the present invention are commercially available analytical reagents, specific examples are as follows.

[0022] (1) Configure the precursor liquid

[0023] 1mmol Zn(NO 3 ) 2 ·6H 2 Dissolve O in 10ml of diethylene glycol as zinc source precursor solution, place on a magnetic stirrer and stir until completely dissolved; dissolve 1mmol thioacetamide and 0.05g of PVP in 40ml of diethylene glycol in a three-necked flask as sulfur source Base solution, placed in a heating mantle and stirred until completely dissolved.

[0024] (2) Synthesis and preparation of zinc oxide nanocrystals

[0025] Heat the completely dissolved sulfur source base solution in step (1) from room temperature at 10°C / min, and immediately inject the zinc source precursor solution into the sulfur source base solution when it reaches 200°C, wherein the zinc source precursor solution is mixed with the sulfur source base solution The final Zn:S molar ratio was 1:1, and the mix...

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Abstract

The invention discloses a method for preparing pure-phase monodisperse ZnS nanocrystalline by using diethylene glycol serving as a solvent. The method comprises steps of dissolving Zn (NO3)2.6H2O in the diethylene glycol, regarding the Zn (NO3)2.6H2O which is dissolved in the diethylene glycol as a zinc source precursor solution, dissolving thiacetamide and Polyvinylpyrrolidone (PVP) in the diethylene glycol, regarding the thiacetamide and the PVP which are dissolved in the diethylene glycol as a sulphur source precursor solution, pouring the sulphur source precursor solution into a flask with three necks which is provided with a condenser tube, feeding a nitrogen flow, heating, injecting the zinc source precursor solution of which the mol ratio of Zn and S is 1:1, conducting reflux for 10 minutes at the temperature from 180 DEG C to 200 DEG C, cooling to the room temperature by using water, cleaning centrifugally by using absolute ethyl alcohol, dispersing zinc oxide nanocrystalline in alcohol and sealing and storing the zinc oxide nanocrystalline. The zinc blende ZnS nanocrystalline which does not have any impure phases and is good in dispersibility is synthesized, the process is free from pollution, the device is simple, the preparation cost is low and the scale industrial production can be applied.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a method for preparing pure-phase and monodisperse ZnS nanocrystals by using diethylene glycol as a solvent through a solution chemical method. Background technique [0002] With its excellent optical and electrical properties, zinc sulfide has opened up its applications in fields such as field emission, catalysts, solar cells, and sensors. As a good optoelectronic semiconductor material, ZnS can have different luminescent forms, including photoluminescence (PL), cathodoluminescence (CL), electroluminescence (EL), electrochemiluminescence (ECL), and thermoluminescence. (TL) et al. Since the nanoscale grain size will lead to changes in various properties of the material, the appearance of ZnS nanocrystals also makes it have extremely good optical and electrical properties, further expanding its wide range of applications in various fields. [0003] In the synthesis of ZnS nanomaterials, mi...

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Application Information

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IPC IPC(8): C01G9/08B82Y40/00
Inventor 郑学荣靳正国
Owner TIANJIN UNIV
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