Preparation method of nanosphere-flower-shaped mixed magnesium doped ZnSnO3

A zinc metastannate, mixed-type technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of large product volume, large specific surface area, and uniform distribution

Inactive Publication Date: 2019-12-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the common spherical or cubic ZnSnO 3 There is still room for improvement in the gas sensing performance of ZnSnO with a larger specific surface area 3 microparticles to enhance ZnSnO 3 The gas sensitivity performance is a relatively simple and effective method

Method used

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  • Preparation method of nanosphere-flower-shaped mixed magnesium doped ZnSnO3
  • Preparation method of nanosphere-flower-shaped mixed magnesium doped ZnSnO3
  • Preparation method of nanosphere-flower-shaped mixed magnesium doped ZnSnO3

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Weigh SnCl 4 ·5H 2 O was dissolved in absolute ethanol and magnetically stirred for 10 min to prepare SnCl 4 Anhydrous ethanol solution;

[0023] (2) Weigh ZnSO 4 ·7H 2 O and Mg(NO 3 ) 2 ·6H 2 O dissolved in deionized water, the molar ratio of zinc sulfate to magnesium nitrate is ZnSO 4 :Mg(NO 3 ) 2 =9:1, then add triethanolamine (TEOA) dropwise into the solution and stir evenly to form ZnSnO 4 , Mg(NO 3 ) 2 And the mixed solution of TEOA (20wt%);

[0024] (3) Add the solution of step (1) into the solution of step (2), and continue stirring for 15 minutes;

[0025] (4) Prepare a 0.4M NaOH solution, add the NaOH solution dropwise to the mixed solution of step (3) while stirring, the pH value of the solution is 11, continue stirring for 15 minutes after the addition is completed, and then let it stand for 6 hours, Generate unetched precursor precipitation;

[0026] (5) Collect the precipitate obtained from the reaction of step (4), clean it up with deio...

Embodiment 2

[0030] (1) Weigh SnCl 4 ·5H 2 O was dissolved in absolute ethanol and magnetically stirred for 10 min to prepare SnCl 4 Anhydrous ethanol solution;

[0031] (2) Weigh ZnSO 4 ·7H 2 O and Mg(NO 3 ) 2 ·6H 2 O dissolved in deionized water, the molar ratio of zinc sulfate to magnesium nitrate is ZnSO 4 :Mg(NO 3 ) 2 =9:1, drop triethanolamine (TEOA) and stir evenly to form ZnSnO-containing 4 , Mg(NO 3 ) 2 And the mixed solution of TEOA (20wt%);

[0032] (3) Add the solution of step (1) into the solution of step (2), and continue stirring for 15 minutes;

[0033] (4) prepare 0.4M NaOH aqueous solution, under the situation of stirring, add NaOH solution dropwise in the mixed solution of step (3), the pH value of solution is 11, continue to stir for 15min after the dropwise addition is completed, then let stand for 6h, Obtain unetched solid precursor precipitation at this moment; On its basis, the NaOH aqueous solution of 2M is added dropwise while stirring, and the solut...

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Abstract

According to the invention, nanosphere-flower-like mixed type magnesium-doped ZnSnO3 particles are prepared on the basis of a coprecipitation method, and the ZnSnO3 particles subjected to proper magnesium doping modification are the combination of nanoscale spheres and micron-scale flower-like particles. The Mg-doped ZnSnO3 powder is prepared by adopting the coprecipitation method, and the methodis simple in process, easy to operate, large in product quantity and uniform in distribution. In the preparation process, NaOH is as a precipitant, the nanoscale hollow Mg-doped ZnSnO3 is finally obtained by adjusting the pH value of a solution and assisting by an organic additive TEOA, and compared with nanoscale cubic or spherical ZnSnO3 prepared by other methods, the nanoscale Mg-doped ZnSnO3 has a relatively large specific surface area.

Description

technical field [0001] The present invention relates to a kind of gas-sensing material, specifically, relate to a kind of preparation nanosphere-flower shape mixed type magnesium-doped zinc metastannate (ZnSnO 3 )Methods. Background technique [0002] The environment of human life is closely related to the surrounding air. While some dangerous gases (such as gas, natural gas, liquefied petroleum gas, etc.) bring great convenience to people's lives, their safety cannot be ignored. Explosions, fires, poisoning caused by dangerous gases Such accidents remind people of the importance of effective monitoring and prevention of dangerous gases. Gas sensors can detect specific dangerous gases in the environment and can effectively prevent dangerous accidents. There are many kinds of gas sensors. They detect different types of gases and have different detection performances. Among them, metal oxide semiconductor gas sensors have received extensive attention and research at home and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/00C01G19/006C01P2004/03C01P2004/34C01P2004/38C01P2004/61C01P2004/64
Inventor 王秀宇李亨朱宣同夏梦真
Owner TIANJIN UNIV
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