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Porous tin dioxide material as well as preparation method and application thereof

A technology of tin dioxide and stannous chloride, applied in the direction of tin oxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of response sensitivity less than 6.5, achieve novel shape, cheap and easy raw materials The effect of gaining and sensitive performance

Inactive Publication Date: 2013-05-29
DALIAN UNIV OF TECH
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Problems solved by technology

Gu Cuiping of Anhui Normal University used copper chloride, stannous chloride dihydrate, thiourea, and ethylene glycol as raw materials to produce copper tin sulfur, and obtained a porous flower-shaped tin dioxide material after calcination and pickling. Toluene, formaldehyde and other gases have high sensitivity, but the response sensitivity to 100ppm acetone is less than 6.5

Method used

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  • Porous tin dioxide material as well as preparation method and application thereof
  • Porous tin dioxide material as well as preparation method and application thereof
  • Porous tin dioxide material as well as preparation method and application thereof

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Embodiment 1

[0030] (1) Preparation of stannous sulfide with hierarchical flower-like structure by solvothermal method

[0031] ① First, dissolve 10 mmoles of stannous chloride dihydrate in 300 mL of ethylene glycol, and stir until completely dissolved. Weigh 14 mmoles of thiourea, dissolve it in the ethylene glycol solution of stannous chloride, and form a colorless transparent solution after magnetic stirring for 30 minutes. Take 30mL of the prepared solution and transfer it into a 50mL Teflon reaction kettle, place the reaction kettle in an electric constant temperature drying oven, raise it from room temperature to 200°C, and keep it at 200°C for 12 hours and then cool down naturally. The obtained black precipitate was repeatedly washed in absolute ethanol for 5 times, and then dried in a drying oven at 80°C to obtain stannous sulfide with hierarchical curdled structure.

[0032] ②Put the graded flower-like stannous sulfide obtained by the solvothermal method into an open muffle furna...

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Abstract

The invention relates to a porous tin dioxide material as well as a preparation method and application thereof, and belongs to the technical field of preparation process of metal oxide semiconductor sensor materials. The preparation method of the porous tin dioxide material comprises the following steps of: obtaining a hierarchical patterned structure stannous sulfide by utilizing a solvothermal method; and obtaining a patterned ball shaped porous tin dioxide material by utilizing an oxygen-ventilating and calcining method. According to the preparation method of the porous tin dioxide material disclosed by the invention, the patterned ball shaped porous tin dioxide, which has clear petals consisting of nanometer particles and has a stable structure, is obtained by utilizing the simple solvothermal method and the oxygen-ventilating and calcining method. Meanwhile, a heater-type gas sensor, which is manufactured by the porous tin dioxide material, has better and more sensitive sensitivity to the acetone.

Description

technical field [0001] The invention relates to a porous tin dioxide material and its preparation method and application, and belongs to the technical field of preparation technology of metal oxide semiconductor sensor materials. Background technique [0002] Tin dioxide is one of the earliest semiconductor gas sensor materials studied. Because of its high electrical conductivity, stable crystal structure, low cost and wide applicability, it has always been a research and application hotspot in the field of semiconductor gas sensors. The sensitive characteristics of semiconductor gas-sensing materials depend on the structure of the material (ie, grain size, specific surface area, dimension, network and pore structure, etc.). In general, the reduction of grain size can significantly improve the sensitive properties of materials. However, van der Waals gravity makes 0-dimensional nanomaterials more likely to agglomerate with smaller size, making it difficult to further impro...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00
Inventor 王兢田江丽杜海英于鹏
Owner DALIAN UNIV OF TECH
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