Porous tin dioxide material as well as preparation method and application thereof
A technology of tin dioxide and stannous chloride, which is applied in the analysis of materials, material analysis by electromagnetic means, and measurement devices, can solve the problem of response sensitivity less than 6.5, and achieve novel appearance, sensitive performance, and cheap raw materials Easy to get effect
Inactive Publication Date: 2015-04-22
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
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Embodiment 1
[0030] (1) Preparation of hierarchical flower-like stannous sulfide by solvothermal method
[0031] ① First, dissolve 10 millimoles of stannous chloride dihydrate in 300 mL of ethylene glycol, and magnetically stir until completely dissolved. Weigh 14 millimoles of thiourea, dissolve it in an 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 thermostatic drying oven, raise the temperature from room temperature to 200°C, and keep it at 200°C for 12 hours, then cool down naturally. After the obtained black precipitate is repeatedly washed in absolute ethanol for 5 times, it is dried in a drying box at 80°C to obtain the graded curd structure stannous sulfide.
[0032] ② Put the graded flower-like stannous sulfide obtained by the solvothermal method into an open muffle furnace, ra...
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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 a preparation method and application thereof, and belongs to the technical field of metal oxide semiconductor sensor material preparation technology. Background technique [0002] Tin dioxide is one of the earliest researched semiconductor gas sensor materials. Because of its high electrical conductivity, stable crystal structure, low cost and wide applicability, it has always been a hotspot of research and application in the field of semiconductor gas sensors. The sensitive characteristics of semiconductor gas-sensitive 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 sensitivity of the material. However, van der Waals gravity makes 0-dimensional nanomaterials smaller in size, easier to agglomerate, which makes it difficult to further improve...
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IPC IPC(8): G01N27/00
Inventor 王兢田江丽杜海英于鹏
Owner DALIAN UNIV OF TECH