Preparation of silicon dioxide nano-tube

A technology of silicon dioxide and nanotubes, which is applied in the direction of silicon oxide, chemical instruments and methods, and single crystal growth. It can solve the problems of small aspect ratio, large diameter distribution, and low yield of nanotubes. The effect of large ratio, uniform size and simple process flow

Inactive Publication Date: 2008-10-08
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of low nanotube yield, small aspect ratio, and large diameter distribution in the existing silica nanotube preparation method, thereby providing a high yield, large aspect ratio, Preparation method of silica nanotubes with uniform size

Method used

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  • Preparation of silicon dioxide nano-tube
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  • Preparation of silicon dioxide nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Weigh 0.04g of D,L-tartaric acid and add it to 10ml of ethanol, ultrasonically until the tartaric acid is completely dissolved, wherein the concentration of tartaric acid in the resulting solution is 0.027mol / L;

[0027] 2) adding 4ml mass percent concentration to the solution obtained in the above step 1) is 28% ammonia solution;

[0028] 3) In the stirring state, add 1.5 ml of ethyl orthosilicate dropwise to the solution obtained in step 2) within 1 hour, and after the dropwise addition, let stand for 10 hours to obtain a white gel;

[0029] 4) The above white gel was repeatedly washed with a large amount of deionized water ultrasonically, and the obtained white floc was dried at 80° C. for 2 hours to obtain the silica nanotubes of the present invention.

[0030] figure 1 Provided the silicon dioxide nanotube scanning electron microscope (SEM) photo that present embodiment prepares, can see from the figure, the silicon dioxide nanotube gained in embodiment 1 is un...

Embodiment 2

[0032] 1) Weigh 0.015g of L-tartaric acid and add it to 10ml of ethanol, ultrasonically until the tartaric acid is completely dissolved, wherein the concentration of tartaric acid in the resulting solution is 0.01mol / L;

[0033] 2) adding 2ml mass percent concentration to the solution obtained in the above step 1) is 24% ammonia solution;

[0034] 3) Under stirring, add 0.6 ml of propyl orthosilicate to the solution obtained in step 2) at one time, and then let it stand for 24 hours to obtain a white gel;

[0035] 4) The above white gel was repeatedly washed with a large amount of deionized water ultrasonically, and the obtained white floc was dried at 50° C. for 10 hours to obtain the silica nanotubes of the present invention.

Embodiment 3

[0037] 1) Weigh 0.06g of D,L-tartaric acid and add it to 10ml of ethanol, and sonicate until the tartaric acid is completely dissolved, wherein the concentration of tartaric acid in the resulting solution is 0.04mol / L;

[0038] 2) adding 6ml mass percent concentration to the solution obtained in the above step 1) is 26% ammonia solution;

[0039] 3) Under stirring, add 3.2ml of orthobutyl silicate dropwise to the solution obtained in step 2) within 2 hours, and after the dropwise addition, a white gel is obtained;

[0040] 4) The above-mentioned white gel was immediately washed repeatedly with a large amount of deionized water ultrasonically, and the obtained white floc was dried at 65° C. for 6 hours to obtain the silica nanotubes of the present invention.

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Abstract

The invention provides a preparation method of silicon dioxide nano-tubes, which includes the following steps. (1) The ethanol solution of tartrate is in preparation. The ultrasonic is implemented until the tartrate is dissolved completely, so that a the first solution can be obtained, wherein the concentration of tartrate is 0.01 to 0.04mol / L. (2) The ammonia solution with the weight percentage concentration of 24% to 28% is added to the first solution obtained from the first step, thus a the second solution is obtained, wherein the volume ratio of the ammonia solution and the first solution is 0.2 to 0.6. (3) In a state of agitation, the silicon ester is dropped into the second solution obtained from the second step within 0 to 2 hours, which then stands for 0 to 24 hours after the dropping is completed. Thereby a white gel is obtained, wherein the volume ratio of the silicon ester and the second solution is 0.05 to 0.2. (4) The white gel obtained from the third step is repeatedly washed with the deionized water ultrasonic. Afterwards, the white floc obtained from the washing is dried, so that the silicon dioxide nano-tubes are obtained. Therefore, the method of the invention has the advantages of high yield ratio, large aspect ratio, uniform size and so on.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a method for preparing silicon dioxide nanotubes. Background technique [0002] Since the discovery of carbon nanotubes, one-dimensional tubular nanomaterials have received extensive attention, and more and more researches have been done on them. The unique structure and properties of one-dimensional tubular nanomaterials have potential applications in many aspects such as catalyst carriers, sensors, composite materials, drug storage and sustained release. In recent years, people have prepared TiO 2 , V 2 o 5 、MoS 2 and other inorganic tubular nanomaterials. As a non-toxic, odorless and non-polluting non-metallic material, silica has excellent properties such as high thermal conductivity, low thermal expansion coefficient and good electrical insulation. It is used in composite material fillers, photoelectric solar cells, catalyst carriers and lithium batteries. El...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/18C30B29/62C01B33/113
Inventor 付绍云郑斌李元庆肖红梅
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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