Olivary porous stannic oxide sensitive to hydrogen sulfide as well as preparation and application

An olive-shaped, hydrogen sulfide technology, applied in tin oxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as cost and practicability limit application, achieve a simple and feasible preparation scheme, and ensure personnel safety. , good stability effect

Inactive Publication Date: 2015-03-25
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the complex method can improve the selective responsiveness, the cost and practicality limit its application in actual production

Method used

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  • Olivary porous stannic oxide sensitive to hydrogen sulfide as well as preparation and application
  • Olivary porous stannic oxide sensitive to hydrogen sulfide as well as preparation and application
  • Olivary porous stannic oxide sensitive to hydrogen sulfide as well as preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of "olive shape" porous SnO 2 The preparation method of nanoparticle, its step is as follows:

[0025] (1) Weigh the surfactant polyvinylpyrrolidone (k=30) and polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (its molecular formula is: PEO-PPO-PEO), 0.4 g and 0.8 g respectively, dissolved in 60 ml of deionized water and ethanol solution with a volume ratio of 1:3, completely dissolved by magnetic stirring and the solution was clear;

[0026] (2) Weigh 0.226 g and 1.8 g of tin chloride tetrahydrate and oxalic acid dihydrate with a molar ratio of 1:20 respectively, dissolve in (1) to clarify the solution, and magnetically stir to dissolve completely;

[0027] (3) Pour the solution of the above step (2) into a 100 ml Teflon hydrothermal reaction kettle, place the reaction kettle in a constant temperature blast dryer, raise it from room temperature to 180°C, and heat it at 180°C Cool down naturally after keeping for 12 hours;

[0028] (...

Embodiment 2

[0037] A kind of "olive shape" porous SnO 2 The preparation method of nanoparticle, its step is as follows:

[0038] (1) Weigh the surfactant polyvinylpyrrolidone (k=30) and polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (its molecular formula is: PEO-PPO-PEO), 0.4 g and 0.8 g respectively, dissolved in 60 ml of deionized water and ethanol solution with a volume ratio of 1:3, completely dissolved by magnetic stirring and the solution was clear;

[0039] (2) Weigh 0.226 g and 0.9 g of tin chloride tetrahydrate and oxalic acid dihydrate with a molar ratio of 1:10 respectively, dissolve in (1) to clarify the solution, and magnetically stir to dissolve completely;

[0040] (3) Pour the solution of the above step (2) into a 100 ml Teflon hydrothermal reaction kettle, place the reaction kettle in a constant temperature blast dryer, raise it from room temperature to 180°C, and heat it at 180°C Cool down naturally after keeping for 12 hours;

[0041] (...

Embodiment 3

[0045](1) Weigh the surfactant polyvinylpyrrolidone (k=30) and polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (its molecular formula is: PEO-PPO-PEO), 0.4 g and 0.8 g respectively, dissolved in 60 ml of deionized water and ethanol solution with a volume ratio of 1:3, completely dissolved by magnetic stirring and the solution was clear;

[0046] (2) Weigh 0.226 g and 2.7 g of tin chloride tetrahydrate and oxalic acid dihydrate with a molar ratio of 1:30 respectively, dissolve in (1) to clarify the solution, and magnetically stir to dissolve completely;

[0047] (3) Pour the solution of the above step (2) into a 100 ml Teflon hydrothermal reaction kettle, place the reaction kettle in a constant temperature blast dryer, raise it from room temperature to 180°C, and heat it at 180°C Cool down naturally after 12 hours;

[0048] (4) After the reaction is over, centrifuge the light yellow precipitate in (3) to obtain the product, and wash it with absolut...

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Abstract

The invention relates to a preparation method of olivary porous stannic oxide sensitive to hydrogen sulfide. The preparation method comprises the steps of respectively dissolving 0.4g of surface active agent polyvinylpyrrolidone (k=30) and 0.8g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (PEO-PPO-PEO) in a solvent prepared by 60ml of deionized water and ethanol solution in a volume ratio of 1:3; dissolving stannous chloride dihydrate and oxalic acid dihydrate in a molar ratio of 1: 10 to 1: 30 in a settled solution of (1); pouring the solution into a 100ml hydrothermal reaction kettle to have hydrothermal reaction at the temperature of 180 DEG C for 12 hours; centrifugally separating, washing and annealing a reaction product to obtain olivary porous stannic oxide nano particles sensitive to hydrogen sulfide. The prepared stannic oxide nano particles are good in selectivity and response property to toxic and harmful gas, namely hydrogen sulfide. The olivary porous stannic oxide has characteristics of simple and easy preparation method, good product performance and the like, so that the stannic oxide nano particles have good application prospects in the field of a gas-sensitive sensor.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of metal oxide semiconductor sensor materials, and in particular relates to hydrogen sulfide-sensitive "olive-shaped" porous tin oxide and its preparation and application. Background technique [0002] Tin dioxide is one of the earliest semiconductor gas sensor materials studied. Because of its good electrical conductivity, crystal structure and applicability, it has always been a research and application hotspot in the field of semiconductor gas sensors. So far, tin dioxide with various shapes such as nanowires, nanorods, nanobelts, nanosheets, nanospheres and nanoflowers have been reported in the literature, but "olive-shaped" tin dioxide has not been reported. Generally, pure nano-tin dioxide has a certain response to gases such as carbon monoxide, hydrogen sulfide, ethanol, triethylamine and formaldehyde, but has the disadvantages of poor selectivity and poor response. General...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
CPCC01G19/02C01P2002/72C01P2004/03C01P2004/64C01P2006/40
Inventor 何丹农胡骏尹桂林
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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