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Gold-methyl amino stannous iodide-tin dioxide composite material, application and preparation method thereof

A technology of stannous iodide and tin dioxide, which is applied to the analysis of materials, material resistance, and material analysis through electromagnetic means, can solve problems such as multi-component composite materials, and achieve high response sensitivity, low operating temperature, and reduced The effect of recovery time

Inactive Publication Date: 2019-01-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no combination of precious metals and SnO 2 and CH 3 NH 3 MX 3 Related reports on multi-component composite materials

Method used

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  • Gold-methyl amino stannous iodide-tin dioxide composite material, application and preparation method thereof
  • Gold-methyl amino stannous iodide-tin dioxide composite material, application and preparation method thereof
  • Gold-methyl amino stannous iodide-tin dioxide composite material, application and preparation method thereof

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Experimental program
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Embodiment 1

[0035] In the present embodiment, a kind of preparation method of gold-methylamino tin iodide-tin dioxide composite material, concrete steps are as follows:

[0036] a. in N 2 Under atmosphere, mix 8ml of 3.79M molar concentration of HI aqueous solution and 1ml of 9.14M molar concentration of H 3 PO 2 The aqueous solution is mixed, and then the prepared mixed solution is mixed in N 2 Degassing in the air flow for 2 minutes;

[0037] b. After heating the degassed mixed solution in step a to 120°C with an oil bath, 0.372g of SnI 2 Add to the mixed solution and stir to make SnI 2 Dissolved to form a bright yellow solution;

[0038] c. Add 0.159 g solid CH to the bright yellow solution prepared in step b 3 NH 3 I, then stirred to CH 3 NH 3 I dissolves to obtain a mixed solution of Sn ions;

[0039] d. Adding 1 ml of HAuCl with a molar concentration of 10 mM to the Sn ion mixed solution prepared in step c 4 The solution is stirred, and heated at 120°C until the volume of...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, especially in that:

[0050] In the present embodiment, a kind of gold-methylamino tin iodide-tin dioxide composite material preparation method, concrete steps are as follows:

[0051] Step a~step e: same as embodiment one;

[0052] Step f: Put the solid powder dried in step e into a muffle furnace, and bake it at 190°C for 2 hours in an oxidizing gas atmosphere to obtain Au / CH 3 NH 3 SnI 3 / SnO 2 Composite material, named MSA190.

[0053] Experimental test analysis:

[0054] For the gold-methylamino tin iodide-tin dioxide composite material Au / CH prepared in this embodiment 3 NH 3 SnI 3 / SnO 2 Perform experimental test analysis. figure 2 a is the Au / CH obtained in Example 2 3 NH 3 SnI 3 / SnO 2 XRD patterns of gas sensor materials. As shown in the figure, for MSA190, the diffraction peaks appearing at 2θ=25.68°, 26.32°, 29.72° are attributed to CH 3 NH 3 SnI 3 ; The diffraction peaks at 2θ=33.94°,...

Embodiment 3

[0057] This embodiment is basically the same as the previous embodiment, and the special features are:

[0058] In the present embodiment, a kind of gold-methylamino tin iodide-tin dioxide composite material preparation method, concrete steps are as follows:

[0059] Step a~step e: same as embodiment one;

[0060] Step f: Put the solid powder dried in step e into a muffle furnace, and bake it at 600°C for 2 hours in an oxidizing gas atmosphere to obtain Au / CH 3 NH 3 SnI 3 / SnO 2 Composite material, named MSA600.

[0061] Experimental test analysis:

[0062] For the gold-methylamino tin iodide-tin dioxide composite material Au / CH prepared in this embodiment 3 NH 3 SnI 3 / SnO 2 Perform experimental test analysis. image 3 a is the XRD pattern of the MSA600 gas sensor material obtained in Example 3. The narrow and sharp diffraction peaks at 2θ=26.52°, 33.84°, 37.86°, and 51.78° are attributed to tetragonal SnO 2 (110), (101), (200), (211) crystal planes of (JCPDS card...

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Abstract

The invention discloses a Gold-methyl amino stannous iodide-tin dioxide composite material, an application and a preparation method thereof. The Au / CH3NH3SnI3 / SnO2 composite material can be used as room temperature NO2 semiconductor sensor material, and Au is introduced into CH3NH3SnI3 by a wet chemical method and partially decomposed into SnO2 by roasting thereby obtaining the Au / CH3NH3SnI3 / SnO2composite material. The heterojunction is formed between CH3NH3SnI3 and SnO2, so that photo-generated electrons of CH3NH3SnI3 are easily transferred to a conduction band of SnO2, the photoactivation of SnO2 is accelerated, and the recombination of photo-generated electrons and holes is avoided, and the quantum efficiency of CH3NH3SnI3 is improved. A light-assisted gas sensitive material with highstability and large light absorption range is obtained under the interaction of three materials. The preparation method is simple and easy to be implemented.

Description

technical field [0001] The present invention relates to a tin dioxide composite material, its application and preparation method, in particular to a perovskite-tin dioxide composite material, its application and preparation method, which are applied to nanomaterial science and light-assisted semiconductor gas sensing The field of sensor technology. Background technique [0002] NO 2 Gas is one of the main pollutants in the atmosphere, generally produced by industrial activities and vehicle exhaust. At very low concentrations, NO 2 May cause many environmental problems and respiratory diseases, such as asthma, acid rain, photochemical smog, etc., so the development of NO 2 Detection technology is very necessary. [0003] Semiconductor gas sensors have the advantages of high sensitivity, good stability, and ease of manufacture and maintenance, and are widely used in the fields of environmental monitoring, public safety, and industrial control. A large number of semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12B82Y15/00B82Y30/00
CPCB82Y15/00B82Y30/00G01N27/127
Inventor 王晓红徐甲强张欣瑜陈伊璐
Owner SHANGHAI UNIV
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