Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for controllably synthesizing nano zinc oxide based on solvent heat

A nano-zinc oxide and solvothermal technology is applied in the synthesis and application of nanomaterials, which can solve the problems of complex synthesis process, difficult synthesis, and many raw materials, and achieve uniform product distribution, convenient post-processing and high controllability. Effect

Inactive Publication Date: 2012-06-27
SHENYANG POLYTECHNIC UNIV
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The reaction controllable accuracy is low, and it is easily affected by environmental and human factors
The sol-gel method and microemulsion method have high gelation temperature and are difficult to control accurately; the co-precipitation method involves many raw materials and is a spontaneous process, which is difficult to control the reaction conditions artificially;
[0005] (2) The synthesis process is complicated and the synthesis is difficult
In the PVP molecule, it is the active functional group of γ-butyrolactam that may also chemically interact with nanocrystals or crystal faces. There is no report on the controllable synthesis of nanomaterials using lactam functional groups.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controllably synthesizing nano zinc oxide based on solvent heat
  • Method for controllably synthesizing nano zinc oxide based on solvent heat
  • Method for controllably synthesizing nano zinc oxide based on solvent heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 30 milliliters of ethanol with a mass fraction of 95% is added to a 50 milliliter hydrothermal kettle, and then 1.74×10 -5 mol (0.625 grams) of polyvinylpyrrolidone (PVP) was stirred and dissolved, and then added 5.7×10 -4 mol (0.125 g) of zinc acetate dihydrate was stirred and dissolved, and finally added 1.88×10 -2 mol (0.75 grams) of sodium hydroxide and stirred at room temperature for 20 minutes;

[0039] (2) after airtight hydrothermal kettle, it is placed in baking oven, is warming up to 100 ℃, insulation reaction 1 hour;

[0040] (3) After the reaction is completed, cool the hydrothermal kettle to room temperature naturally in an oven, open the hydrothermal kettle and pour off the upper layer solution, and keep the precipitated product; first wash the product with deionized water, disperse it by ultrasonic vibration, and collect it by centrifugal sedimentation Precipitate, the obtained precipitate was separated by filtration and then washed with 95% ethanol...

Embodiment 2

[0042](1) 60 milliliters of ethanol with a mass fraction of 95% is added to a 100 milliliter hydrothermal kettle, and then 3.48×10 -5 mol (1.25 grams) of polyvinylpyrrolidone (PVP) was stirred and dissolved, and then added 1.14×10 -3 mol (0.25 g) of zinc acetate dihydrate was stirred and dissolved, and finally added 3.76×10 -2 mol (1.5 grams) of sodium hydroxide and stirred at room temperature for 20 minutes;

[0043] (2) after airtight hydrothermal kettle, it is placed in baking oven, is warming up to 120 ℃, insulation reaction 2 hours;

[0044] (3) After the reaction is completed, cool the hydrothermal kettle to room temperature naturally in an oven, open the hydrothermal kettle and pour off the upper layer solution, and keep the precipitated product; first wash the product with deionized water, disperse it by ultrasonic vibration, and collect it by centrifugal sedimentation Precipitate, the obtained precipitate was separated by filtration and then washed with 95% ethanol ...

Embodiment 3

[0046] (1) 30 milliliters of ethanol with a mass fraction of 95% is added to a 50 milliliter hydrothermal kettle, and then 1.74×10 -5 mol (0.625 grams) of polyvinylpyrrolidone (PVP) was stirred and dissolved, and then added 5.7×10 -4 mol (0.125 g) of zinc acetate dihydrate was stirred and dissolved, and finally added 1.88×10 -2 mol (0.75 grams) of sodium hydroxide and stirred at room temperature for 30 minutes;

[0047] (2) place it in the oven after airtight hydrothermal kettle, be warming up to 140 ℃, insulation reaction 1 hour;

[0048] (3) After the reaction is completed, cool the hydrothermal kettle to room temperature naturally in an oven, open the hydrothermal kettle and pour off the upper layer solution, and keep the precipitated product; first wash the product with deionized water, disperse it by ultrasonic vibration, and collect it by centrifugal sedimentation Precipitate, the obtained precipitate was separated by filtration and then washed with 95% ethanol and dei...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of nano material synthesis and application, and in particular relates to a method for synthesizing nano zinc oxide based on solvent heat. According to the invention, zinc acetate dehydrate is used as a raw material, sodium hydroxide is used as an alkalinizing agent, and polyvinylpyrrolidone is used as an additive. The method comprises the following synthesis steps of: firstly, adding ethanol in a hydrothermal kettle until the filling degree is 0.6; adding the additive polyvinylpyrrolidone, the raw material zinc acetate dehydrate and the alkalinizing agent sodium hydroxide in the solution, and stirring for 20-40 minutes; sealing the hydrothermal kettle and then placing the sealed hydrothermal kettle in an oven, heating to 80-160 DEG C and maintaining the temperature to be constant for 0.5-3 hours; and finally, naturally cooling, centrifuging the obtained product, washing the product with deionized water and ethanol, and drying to obtain the nano zinc oxide products with different morphologies.

Description

technical field [0001] The invention belongs to the field of synthesis and application of nanometer materials, and in particular relates to a method for synthesizing nanometer zinc oxide with solvothermal controllability. Background technique [0002] Nano-zinc oxide (ZnO) has at least one dimension below hundreds of nanometers. It is a new type of high-function inorganic fine chemical. Due to its small size, it exhibits such as non-migration, piezoelectricity, and the ability to absorb and scatter ultraviolet and visible light. And other characteristics, using its special properties in catalysis, optics, magnetism, mechanics, etc., it can be applied to vulcanization activators of synthetic rubber, foaming agent additives, high-efficiency photocatalysts, varistors, ultraviolet shielding materials, magnetic materials, etc. field. [0003] Liquid-phase chemical synthesis plays an important role in the controllable synthesis of nanomaterials because of its low cost, controllab...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G9/02B82Y40/00
Inventor 徐舸刘公召
Owner SHENYANG POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com