Method for preparing rice-granule nano ZnO

A technology of nano and rice grains, which is applied in the field of preparation of inorganic functional materials, can solve the problems of rice grain nano-ZnO that have never been seen before, and achieve the effects of low cost, mild and easy-to-control reaction conditions, and low energy consumption

Inactive Publication Date: 2010-08-25
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the report of the synthesis of rice-like nano-ZnO by a simple microemulsion-assisted hydrothermal method has not been seen.

Method used

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  • Method for preparing rice-granule nano ZnO
  • Method for preparing rice-granule nano ZnO
  • Method for preparing rice-granule nano ZnO

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) At a room temperature of 31°C, configure 50mL of 0.1moL / L zinc acetate solution, take 10mL of it in a 50mL beaker, add the NaOH solution with a higher concentration dropwise into the beaker containing the zinc acetate solution, and prepare a clear Zn( Oh) 4 2- solution, and finally set the volume in a 50mL volumetric flask to configure 0.02moL / L of Zn(OH) 4 2- solution;

[0021] 2), the preparation contains 0.02mol / L Zn(OH) 4 2- The microemulsion, wherein the substance concentration of the surfactant alkyl polyoxyethylene ether is 0.25mol / L, the molar ratio ω of water and the surfactant is 10, and the rest is the content of the oil phase, and the obtained microemulsion system is placed at room temperature Stir for 30 minutes under the same conditions, then transfer it to a 25mL polytetrafluoroethylene-lined stainless steel reactor for hydrothermal assistance, set the temperature at 120°C for 12 hours, and naturally cool to room temperature after the reaction. T...

Embodiment 2

[0023] 1) At a room temperature of 31°C, configure 50mL of 0.1moL / L zinc acetate solution, take 10mL of it in a 50mL beaker, add the NaOH solution with a higher concentration dropwise into the beaker containing the zinc acetate solution, and prepare a clear Zn( Oh) 4 2- solution, and finally set the volume in a 50mL volumetric flask to configure 0.02moL / L of Zn(OH) 4 2- solution;

[0024] 2), the preparation contains 0.02mol / L Zn(OH) 4 2- The microemulsion, wherein the substance concentration of surfactant alkyl polyoxyethylene ether is 0.25mol / L, the molar ratio ω of water and surfactant is 15, and the rest is oil phase content, and the gained microemulsion system is placed at room temperature Stir for 30 minutes under the same conditions, then transfer it to a 25mL polytetrafluoroethylene-lined stainless steel reactor for hydrothermal assistance, set the temperature at 120°C for 12 hours, and naturally cool to room temperature after the reaction. The obtained white pre...

Embodiment 3

[0026] 1) At a room temperature of 31°C, configure 50mL of 0.1moL / L zinc acetate solution, take 10mL of it in a 50mL beaker, add the NaOH solution with a higher concentration dropwise into the beaker containing the zinc acetate solution, and prepare a clear Zn( Oh) 4 2- solution, and finally set the volume in a 50mL volumetric flask to configure 0.02moL / L of Zn(OH) 4 2- solution;

[0027] 2), the preparation contains 0.02mol / L Zn(OH) 4 2- Microemulsion, wherein the substance concentration of surfactant alkyl polyoxyethylene ether is 0.25mol / L, the molar ratio ω of water and surfactant is 20, and the rest is oil phase content, and the gained microemulsion system is placed at room temperature Stir for 30 minutes under the same conditions, then transfer it to a 25mL polytetrafluoroethylene-lined stainless steel reactor for hydrothermal assistance, set the temperature at 120°C for 12 hours, and naturally cool to room temperature after the reaction. The obtained white precipi...

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Abstract

The invention provides a method for preparing a rice-granule ZnO nano structure. The method comprises the following steps: selecting quaternary microemulsion consisting of nonionic surfactant alkyl polyoxyethylene ether, cyclohexane, n-octyl alcohol and water phase, preparing a precursor Zn (OH)42- by using zinc acetate and sodium hydroxide as initial reactants, mixing the components forming inverse microemulsion, powerfully stirring the components on a magnetic stirrer to form uniform and transparent inverse microemulsion with stable property, then transferring the inverse microemulsion to a 25 milliliters of polytetrafluoroethylene-lined autoclave, setting the temperature and the time, performing auxiliary hydrothermal reaction, naturally cooling a reaction product to room temperature after the reaction is finished, centrifugating the product, and washing the product by using acetone, distilled water and anhydrous ethanol to obtain rice-granule ZnO nano granules with uniform appearance, size and height. The technical scheme of the invention, which prepares the rice-granule ZnO nano structure by utilizing the template action of reversed micelle microemulsion and hydrothermal aid, has the characteristics of simple production process, safe production process and difficult agglomeration of products, and can be widely applied to the preparation of inorganic functional material.

Description

technical field [0001] The invention relates to the preparation of an inorganic functional material, in particular to a method for preparing rice-like nano-ZnO with a highly uniform shape and size by using an inverse microemulsion system and assisting a hydrothermal method. Background technique [0002] Zinc oxide (ZnO) is an important wide-bandgap semiconductor material with a bandwidth of up to 3.37eV, a large exciton binding energy (60meV), excellent chemical properties and thermal stability, and good luminescence and photoelectric conversion. And other properties, so that it has a wide range of potential applications in many fields, for example, it can be used in luminescent materials, photoelectric conversion materials, coatings and daily chemical materials, and can be used to manufacture wind-solar electrodes, transformers and various optical devices. At the same time, ZnO is also a material with good biosafety and biocompatibility, which can be used as a carrier of bi...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor黄在银姜俊颖米艳李艳芬周泽广
OwnerGUANGXI UNIV FOR NATITIES