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Preparation method of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material and application of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material

A technology of sno2-fe2o3 and core-shell structure, applied in nanotechnology for materials and surface science, analytical materials, nanotechnology for sensing, etc., to improve response sensitivity and selectivity, large specific surface area, and low cost cheap effect

Inactive Publication Date: 2020-01-14
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently, directly on hollow SnO 2 Growth of Fe on Micro / Nanocubes 2 o 3 Nanostructures are rarely reported

Method used

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  • Preparation method of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material and application of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material
  • Preparation method of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material and application of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material
  • Preparation method of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material and application of core-shell structure hollow microcube SnO2-Fe2O3 sensitive material

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Embodiment 1

[0028] Preparation of hollow microcube SnO with core-shell structure 2 -Fe 2 o 3 Sensitive materials and making acetone gas sensor, the specific process is as follows:

[0029] At room temperature, mix 5 mL of ethanol and 20 mL of water and stir for 5 min as a solvent; then add 1 mmol of ZnCl in sequence 2 , 1 mmol SnCl 4 ·5H 2 O and 1 mmol sodium citrate, continue to stir until the solid is completely dissolved, continue to add 12.5 mmol of NaOH solid to react for 1 h, then add 40 mL, 3M NaOH solution dropwise to react for 0.5 h; centrifuge to collect the solid, and use deionized water repeatedly Washing; dry at 60°C, place in an air atmosphere at 750°C for calcination for 3 h, add 70 mg of solid collected after cooling to 30 mL, 1 M HCl solution for 15 min, centrifuge, wash and dry the precipitate to obtain SnO 2 Porous hollow micro-cube powder;

[0030] Take 40 mg SnO 2 Add porous hollow microcube powder into 10 mL deionized water, stir for 10 min to disperse evenly;...

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Abstract

The invention discloses a preparation method of a core-shell structure hollow microcube SnO2-Fe2O3 sensitive material and application of a core-shell structure hollow microcube SnO2-Fe2O3 sensitive material in an acetone gas sensor. The preparation method comprises the following steps of: preparing SnO2 porous hollow microcube powder by combining a solution chemical etching method with high-temperature calcination; taking SnO2 porous hollow microcube powder as a core skeleton structure, growing Fe2O3 nanoparticles on an outer shell layer of the SnO2 porous hollow microcube powder through adoption of a hydrothermal method in combination with high-temperature calcination to prepare a core-shell structure hollow microcube SnO2-Fe2O3 sensitive materiald, wherein the acetone gas sensor is manufactured on an aluminum oxide substrate sheet printed with a gold interdigital electrode in a dropwise coating manner and is used for selectively detecting an acetone gas. The preparation method is simple and controllable, and the material is stable in structure and good in dispersity; and moreover, the sensitivity and the selectivity of the acetone gas sensor can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of semiconductor metal oxide nano functional materials, in particular to a hollow microcube SnO with a core-shell structure 2 -Fe 2 o 3 Preparation method of sensitive material and its application in acetone gas sensor. Background technique [0002] Hollow micro / nano metal oxides have attracted great attention due to their high specific surface area, well-defined internal space, and greater volumetric adaptability than their solid counterparts of the same size, and have been widely used in lithium-ion batteries, supercapacitors, solar Many fields such as batteries and gas sensors. Recent studies have shown that new composite hollow materials containing multifunctional components or multilayer shells show more desirable properties and enhanced structural advantages in applications compared with single-component hollow structures. Therefore, both in basic research and practic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333C01G49/06C01G19/02B82Y30/00B82Y15/00
CPCG01N27/333C01G19/02C01G49/06B82Y15/00B82Y30/00C01P2004/80C01P2004/38
Inventor 肖丽徐宁宁赵影影徐生瑞
Owner HENAN NORMAL UNIV
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