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Method for synthesizing tin oxide nanocrystalline by mould plate method combined with hydrothermal condition

A technology of tin oxide nanocrystals and water binding, applied in tin oxide, nanotechnology, nanotechnology, etc., can solve problems such as difficulty in controlling the size and shape of nanocrystals, high reaction temperature, etc.

Active Publication Date: 2008-07-02
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of high reaction temperature and difficulty in controlling the size and shape of nanocrystals during traditional synthesis

Method used

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  • Method for synthesizing tin oxide nanocrystalline by mould plate method combined with hydrothermal condition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the preparation of spherical tin oxide nanocrystals:

[0020] Prepare 10 mL of a fresh 0.0025 mol / L surfactant (CTAB) aqueous solution, and add cyclohexane to keep the molar ratio of cyclohexane:CTAB at 0.25:1, place it in a 100 mL beaker, and then add newly configured 0.0125 mol / L 20 mL of stannous chloride aqueous solution. Then the mixed solution was placed in a 100 mL beaker and ultrasonically oscillated for 10 minutes, and then 10 mL of 0.1 mol / L tert-butylamine aqueous solution was added dropwise while ultrasonically oscillating. After the dropwise addition was completed, the ultrasonic vibration was continued for 10 minutes. The whole reaction was carried out at room temperature, and an opaque white colloidal solution was obtained. Add methanol to the white colloidal solution to obtain white precipitates, which are spherical tin oxide nanocrystals, which can be dispersed in methanol again by ultrasonic waves, and can be precipitated from methanol ...

Embodiment 2

[0021] Embodiment 2: the preparation of strip-shaped tin oxide nanocrystals:

[0022] Prepare fresh 0.02mol / L surfactant (CTAB) aqueous solution 10mL, and add cyclohexane, keep cyclohexane: CTAB molar ratio is 0.18:1, put in the beaker, then add the newly configured 0.05mol / L Stannous chloride aqueous solution 10mL. Then the mixed solution was placed in a 100 mL beaker and ultrasonically oscillated for 10 minutes, and then 10 mL of 0.5 mol / L tert-butylamine aqueous solution was added dropwise while ultrasonically oscillating. After the dropwise addition was completed, the ultrasonic vibration was continued for 20 minutes. The whole reaction was carried out at room temperature, and an opaque white colloidal solution was obtained. Add 20 mL of methanol to the white colloidal solution to obtain a white precipitate, which is spherical tin oxide nanocrystals and a small amount of ribbon nanocrystals. The white colloidal solution was transferred to an autoclave and reacted in the...

Embodiment 3

[0023] Embodiment 3: the preparation of strip-shaped tin oxide nanocrystals:

[0024] Prepare 15 mL of fresh 0.005 mol / L surfactant (CTAB) aqueous solution, and add cyclohexane to keep the molar ratio of cyclohexane:CTAB at 0.28:1, place it in a beaker, and then add newly configured 0.05 mol / L 30 mL of stannous chloride aqueous solution. Then the mixed solution was placed in a 100 mL beaker and ultrasonically oscillated for 10 minutes, and then 15 mL of 2 mol / L potassium hydroxide aqueous solution was added dropwise while ultrasonically oscillating. After the dropwise addition was completed, the ultrasonic vibration was continued for 60 minutes. The whole reaction was carried out at room temperature, and an opaque white colloidal solution was obtained. Add 10 mL of methanol to the white colloidal solution to obtain a white precipitate, which is spherical tin oxide nanocrystals and a small amount of ribbon-shaped nanocrystals. Transfer the white colloidal solution to an auto...

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Abstract

The invention provides a method for synthesizing tin oxide nano-crystal by combining template method with hydrothermal condition. The method is that: tin source and template agent are added into water to be dissolved; the obtained material is added with normal hexane and then with water solution containing alkaline matter; the obtained material is sent into a beaker to react for 10-60 minutes under room temperature, or is sent into a reaction vessel to react for 12-72 hours under the temperature of 120-180 DEG C; then the tin oxide nano-crystal are obtained. The whole preparation method of the invention is characterized in that reaction condition is moderate, the operation is simple and the preparation period is short, thereby the preparation method can be easily put into mass production. In addition, tin oxide nano-crystal with different sizes, such as sphere and ribbon shape, can be prepared by adjusting reaction time, temperature, alkaline amount and concentration of reaction matters.

Description

technical field [0001] The invention belongs to a method for synthesizing tin oxide nanocrystals by a template method combined with hydrothermal conditions. Background technique [0002] Tin dioxide is a wide-bandgap n-type semiconductor (Eg=3.5eV, 300K), which can be used as a gas-sensitive material, a moisture-sensitive material, a pressure-sensitive material and a photosensitive material. It has important applications in gas sensors, catalysts, lithium-ion secondary batteries, fuel cells, solar cells and field effect transistors. In the past two decades, with the development of nanoscience and technology, the synthesis of nano-tin oxide has gradually begun and shows broad application prospects (Penny, M.W.et.al.Charge storage in SnO 2 Nanoparticles: A method and mechanism for charge writing / erasing, Applied Physics Letters, 2007(91), 16). So far, a variety of methods can be used to synthesize tin oxide nanomaterials, such as vacuum evaporation gel method, high temperat...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82B3/00
Inventor 林驭寒李海东赵娜娜毛骏范燕迪姬相玲
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES