Controllable preparation method for petaliform tin oxide nano powder

A technology of nano-powder and tin oxide, which is applied in the field of preparation of flake-shaped SnO2 nano-powder, can solve the problems of high cost, complex process technology, and large one-time investment, and achieve low cost, simple process, and simple raw materials. Effect

Inactive Publication Date: 2010-09-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Problems solved by technology

However, although the chemical vapor deposition method used above is easy to control the reaction cond

Method used

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  • Controllable preparation method for petaliform tin oxide nano powder
  • Controllable preparation method for petaliform tin oxide nano powder
  • Controllable preparation method for petaliform tin oxide nano powder

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specific Embodiment 1

[0026] a. Weigh 1.3539g of anhydrous SnCl 2 Dissolve in 20ml of water, then magnetically stir for 10 minutes until a 0.3mol / L white suspension is formed. Weigh 0.8 g of NaOH and dissolve it in 20 ml of deionized water, and then magnetically stir until a transparent NaOH solution of 1.0 mol / L is formed.

[0027]b. Under strong magnetic stirring, evenly drop the transparent NaOH solution into the above white suspension until the pH value is 11, and then magnetically stir for 3 hours to form a precursor suspension with black precipitates.

[0028] c. The above precursor suspension was transferred to a 100ml reaction kettle, hydrothermally treated at 200°C for 24h, and then naturally cooled to room temperature.

[0029] d. Wash the hydrothermal product several times with deionized water and ethanol in sequence until the Cl - Completely removed, dried at 70°C for 1 hour under vacuum conditions to obtain khaki SnO 2 Nano powder, its specific surface area is 51.6m 2 / g. SnO 2 T...

specific Embodiment 2

[0031] a. Weigh 1.3539g of anhydrous SnCl 2 Dissolve in the mixed solution of 5ml ethanol and 15ml water (volume ratio is 1:3), then magnetically stir for 10 minutes until forming 0.3mol / L white suspension. Weigh 0.8g NaOH and dissolve it in 50ml deionized water, then magnetically stir to form a 0.4mol / L transparent NaOH solution.

[0032] b. Under strong magnetic stirring, evenly drop the transparent NaOH solution into the above white suspension until the pH value is 13, and then magnetically stir for 2 hours to form a precursor suspension with black precipitate.

[0033] c. The above precursor suspension was transferred to a 100ml reaction kettle, hydrothermally treated at 180°C for 12h, and then naturally cooled to room temperature.

[0034] d. Wash the hydrothermal product several times with deionized water and ethanol in sequence until the Cl - Completely removed, dried at 70°C for 1 hour under vacuum conditions to obtain khaki SnO 2 Nano powder, its specific surface a...

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Abstract

The invention discloses a controllable preparation method for petaliform tin oxide nano powder, which is mainly characterized in that SnCl2 and NaOH serve as raw materials. The method comprises the following detailed steps: dissolving the SnCl2 and NaOH in deionized water respectively to prepare a tin salt suspension of which the concentration is 0.2 to 0.4mol/L and NaOH solution of which the concentration is 0.3 to 1mol/L; under magnetic stirring, uniformly dripping the NaOH solution into the tin salt solution until the pH value is between 11 and 13, and stirring the solution for 2 to 3 hours to obtain SnO2 precursor; pouring the precursor into a water heating reaction kettle for water heating treatment for 12 to 24 hours at the temperature of 160 to 200 DEG C; and washing and drying the obtained product, and obtaining the petaliform SnO2 powder consisting of single crystal nano sheets of which the thickness is about 3 to 10nm. No any surfactant is added. The method has the characteristics of high quality and yield of the product, low cost, massive production and the like, and is an environment-friendly synthetic method.

Description

technical field [0001] The invention relates to a flake-shaped SnO 2 The invention discloses a preparation method of nanometer powder, and the powder can be applied to the fields of gas sensor materials, photocatalytic materials and the like. Background technique [0002] SnO 2 With excellent photoelectric characteristics and sensitivity to reducing gases, it has been widely used in the fields of gas sensor materials and photocatalytic materials. When SnO 2 After the grain size of the material enters the nanoscale, due to the unique size effect, quantum size effect and surface effect of nanomaterials, it shows many special physical and chemical properties, and its gas-sensing and catalytic properties have been greatly improved. Therefore, for SnO 2 The controllable preparation of the microscopic morphology, particle size and crystal structure of nanomaterials is very important to improve their gas sensing and catalytic properties. [0003] In recent years, researchers h...

Claims

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Application Information

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IPC IPC(8): C01B19/02
Inventor 李月郭艳群杨晔谭瑞琴李勇崔平宋伟杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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