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Method for preparing tin dioxide nanostructure material with floriform appearance by hydrothermal synthesis

A technology of tin dioxide and hydrothermal synthesis, applied in nanostructure manufacturing, tin oxide, nanotechnology, etc., can solve problems such as high reaction temperature, complicated reaction conditions, and long reaction time, and achieve high product purity and simple raw materials , the effect of simple preparation method

Inactive Publication Date: 2010-04-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above methods can prepare tin dioxide materials with nanostructures, but the reaction conditions are relatively complicated, the reaction time is long, and in some cases, the reaction temperature is too high to bring safety hazards, and the yield is relatively low.

Method used

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  • Method for preparing tin dioxide nanostructure material with floriform appearance by hydrothermal synthesis
  • Method for preparing tin dioxide nanostructure material with floriform appearance by hydrothermal synthesis
  • Method for preparing tin dioxide nanostructure material with floriform appearance by hydrothermal synthesis

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Experimental program
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Effect test

Embodiment 1

[0027] Follow the preparation process. Add 0.374g tin dichloride dihydrate into a beaker filled with 49ml ethanol and 49ml deionized water mixed solvent, and magnetically stir for 5 minutes to obtain a translucent white turbid solution; add 7ml ammonia solution (mass concentration 25%-28% ), and continued to stir for 60 minutes; this time, it was a milky white suspension, which was the precursor of tin dioxide. Put the liner of the polytetrafluoroethylene reactor containing the reaction solution into a stress-free stainless steel reactor, and place it in an intelligent temperature-controllable muffle furnace for continuous heating. The reaction conditions are: 120°C, 6h. After the reaction, the solution was centrifuged at a centrifugal rate of 10000r / min for 15min. After repeated centrifugation for 5 times, the solid obtained was vacuum-dried at room temperature into a powder. The transmission electron microscope test sample is to take out a small amount of the solid powder ...

Embodiment 2

[0029] Follow the preparation process. 0.374g tin dichloride dihydrate is added in the beaker that fills the ethanol of 4.9ml and the mixed solvent of 93.1ml deionized water, and magnetically stirred for 5 minutes to obtain a translucent white turbid solution; -28%), and continued to stir for 60 minutes; this time, it was a milky white suspension, which was the precursor of tin dioxide. The polytetrafluoroethylene reactor liner filled with the reaction solution is put into a stress-free stainless steel reactor, and placed in an intelligent temperature-controllable muffle furnace for continuous heating. The reaction conditions are: 120°C, 6h. After the reaction, the solution was centrifuged at a centrifugal rate of 10000r / min for 15min. The solid obtained after centrifugation for 5 times was vacuum-dried at room temperature into a powder. The product is a mixture of flakes of tin dioxide flower-like clusters and nanoparticles.

Embodiment 3

[0031] Follow the preparation process. Add 0.374g tin dichloride dihydrate into a beaker containing 24.5ml ethanol and 73.5ml deionized water mixed solvent, and magnetically stir for 5 minutes to obtain a translucent white turbid solution; add 7ml ammonia solution (mass concentration 25%- 28%), and continued to stir for 60 minutes; this time, it was a milky white suspension, which was the precursor of tin dioxide. The polytetrafluoroethylene reactor liner filled with the reaction solution is put into a stress-free stainless steel reactor, and placed in an intelligent temperature-controllable muffle furnace for continuous heating. The reaction conditions are: 120°C, 6h. After the reaction, the solution was centrifuged at a centrifugal rate of 10000r / min for 15min. The solid obtained after centrifugation for 5 times was vacuum-dried at room temperature into a powder. The product is a mixture of tin dioxide flower clusters and nanoparticles. The transmission electron microscop...

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Abstract

The invention discloses a method for preparing a tin dioxide nanostructure material with a floriform appearance by hydrothermal synthesis, which comprises the following steps: adding tin dichloride powder to a mixed solvent of ethanol and water to prepare a solution reaction system containing tin ions; then adding an ammonia-water solution with the mass concentration of 25%-28% to the solution reaction system and stirring evenly to obtain a reaction precursor; and heating the precursor in a polytetrafluoroethylene reaction kettle by a hydrothermal method, and changing the heating temperature and time of a muffle to obtain the tin dioxide nano-materials with different appearances. The invention can lower the reaction cost and improve the production efficiency of the tin dioxide nano-material, and the prepared nano-material has the advantages of controllable appearances, high purity, good performance, large specific area, good repeatability, and the like and greatly improves the performance of a battery when used as a cathode material of a lithium-ion battery.

Description

technical field [0001] The invention relates to a method for preparing nanomaterials, in particular to a method for hydrothermally synthesizing tin dioxide nanostructure materials with flower-like morphology. Background technique [0002] Nanomaterials and nanostructures are the most dynamic research objects in the field of new materials research today, and have a very important impact on future economic and social development. They are also the most active and important components of nanotechnology that are closest to applications. When the size of nanoparticles decreases to a certain value, the electronic energy level near the Fermi surface of metal particles changes from quasi-continuous to discrete energy levels; and there are discontinuous highest occupied molecular orbital energy levels and lowest unoccupied energy levels in nano-semiconductor particles. The phenomenon of molecular orbital energy level, which makes the energy gap widen, is called the quantum size effec...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82B3/00
Inventor 蒋建中王岑葛明圆许晓斌
Owner ZHEJIANG UNIV
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