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Preparation method of tin dioxide nano material with controllable morphology

A technology of tin dioxide and nanomaterials, applied in the direction of tin oxide and nanotechnology, can solve the problems of uncontrollable shape, many defects, and long cycle, and achieve good shape controllability, high yield, and short experiment cycle short effect

Inactive Publication Date: 2012-06-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the above methods, tin dioxide nanomaterials with various morphologies have been successfully prepared, but most of them have disadvantages such as low yield, long cycle, many defects, and uncontrollable morphology.

Method used

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  • Preparation method of tin dioxide nano material with controllable morphology
  • Preparation method of tin dioxide nano material with controllable morphology
  • Preparation method of tin dioxide nano material with controllable morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Elemental tin powder with a purity of 99.99% was put into a graphite crucible (aperture 20 mm, depth 20 mm) as an anode, which was placed in an arc chamber and fixed. Turn on the mechanical pump, evacuate the vacuum in the arc chamber to 16kPa, and then introduce argon gas at 24kPa. The distance between the cathode and the anode is controlled by the motor, the arc power supply is turned on, the discharge current is 60-70A, the discharge voltage is 20-25V, and the discharge time is 5 minutes. The product is tin dioxide nanobelts. Its product is characterized by Figure 1-3 shown.

Embodiment 2

[0025] Elemental tin powder with a purity of 99.99% was put into a graphite crucible (aperture 20 mm, depth 20 mm) as an anode, which was placed in an arc chamber and fixed. Turn on the mechanical pump to draw the vacuum in the arc chamber to 10kPa. The distance between the cathode and the anode is controlled by the motor, the arc power supply is turned on, the discharge current is 90-100A, the discharge voltage is 50-60V, and the discharge time is 4 minutes. The product is tin dioxide nanobelts.

Embodiment 3

[0027] Elemental tin powder with a purity of 99.99% was put into a graphite crucible (aperture 20 mm, depth 20 mm) as an anode, which was placed in an arc chamber and fixed. Turn on the mechanical pump, evacuate the vacuum in the arc chamber to 40kPa, and then inject 10kPa argon gas. The distance between the cathode and the anode is controlled by the motor, the arc power supply is turned on, the discharge current is 70-80A, the discharge voltage is 30-35V, and the discharge time is 5 minutes. The product is tin dioxide nanodisks. Its product is characterized by Figure 4-5 shown.

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Abstract

The invention relates to a preparation method of tin dioxide nano material with a controllable morphology. The growth morphology of tin dioxide is controlled by adjusting the atmosphere in an arc chamber; the method comprise the steps that firstly, high-purity elemental tin powder is put into a self-made plumbago pot to be sufficiently compressed and served as an arc discharge anode; then the high-purity elemental tin powder is put into the arc chamber and fixed, air in the arc chamber is pre-extracted, the atmosphere in the arc chamber is adjusted; and a power supply is turned on, the distance between a cathode and the anode is controlled through a motor, and arc discharge is produced between the cathode and the anode. Tin dioxide nano material with different morphologies can be prepared by controlling the proportion of air to buffer gas in the arc chamber. Compared with the prior art, the method has the advantages of simple technology, short period, good morphology controllability and the like.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for controlling the growth of tin dioxide nanomaterials by using an arc discharge method and using different atmospheres in an arc chamber to obtain nanomaterials with different shapes. Background technique [0002] Tin dioxide is a wide band gap semiconductor oxide with a band gap of 3.6 eV. Tin dioxide was the earliest material used as a gas sensor. In 1962, Japanese scientist Taguchi Shangyi discovered that sintered tin dioxide ceramics are sensitive to trace active gases (such as carbon monoxide and nitrogen dioxide) in the air and have high stability. It is an excellent gas-sensitive material. Subsequently, it aroused people's research interest in the gas-sensing properties of tin dioxide materials. At present, tin dioxide is the most widely used gas sensitive material and the basis of the entire gas sensor industry. Tin dioxide is also widely used in opti...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y40/00
Inventor 张亚非苏言杰钱炳建张竞魏浩
Owner SHANGHAI JIAO TONG UNIV
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