Preparation of rod-like ZnO/ZIF-8 and low temperature H2 sensitive effect of rod-like ZnO/ZIF-8

A ZIF-8, rod-shaped technology, applied in the field of nano-sensor preparation, can solve the problems of complex synthesis operation, large functional loss and high response temperature, and achieve the effects of good repeatability, low power consumption and simple operation

Inactive Publication Date: 2018-05-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high response temperature, large functional loss, low practicability, complex synthesis operation, and high cost, the present invention provides a low-power, easy-to-operate low-temperature H 2 Preparation method of rod-shaped ZnO / ZIF-8 with sensitive effect

Method used

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  • Preparation of rod-like ZnO/ZIF-8 and low temperature H2 sensitive effect of rod-like ZnO/ZIF-8
  • Preparation of rod-like ZnO/ZIF-8 and low temperature H2 sensitive effect of rod-like ZnO/ZIF-8
  • Preparation of rod-like ZnO/ZIF-8 and low temperature H2 sensitive effect of rod-like ZnO/ZIF-8

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Effect test

Embodiment 1

[0027] one with H 2 The preparation method of the rod-shaped ZnO / ZIF-8 of sensitive effect has the following steps:

[0028] 1) Preparation of zinc oxide seed layer sol: Weigh 4.4g of zinc acetate dihydrate, dissolve it in 25mL of ethylene glycol methyl ether and stir for 30min, then measure 1.2mL of ethanolamine into the above solution, stir on a magnetic stirrer for 30min to form a transparent Homogeneous sol, stand for 12h for later use;

[0029] 2) Cleaning of flat-plate electrodes: After cleaning the alumina flat-plate electrodes (including interdigitated Ag electrodes) with detergent, put them in acetone, isopropanol, absolute ethanol, and deionized water for ultrasonic cleaning for 30 minutes;

[0030] 3) Spin-coating the aluminum oxide flat electrode to form a film: dry the cleaned aluminum oxide flat electrode and put it on a spin coater, spin at a spin coating speed of 3000rpm / min for 30s, and the number of spin coatings is 3 times. After the completion, remove the...

Embodiment 2

[0040] one with H 2 The preparation method of the rod-shaped ZnO / ZIF-8 of sensitive effect has the following steps:

[0041] 1) Preparation of zinc oxide seed layer sol: Weigh 4.4g of zinc acetate dihydrate, dissolve it in 25mL of ethylene glycol methyl ether and stir for 30min, then measure 1.2mL of ethanolamine into the above solution, stir on a magnetic stirrer for 30min to form a transparent The homogeneous sol was left to stand for 12 hours for later use.

[0042] 2) Cleaning of flat-plate electrodes: After cleaning the alumina flat-plate electrodes (including interdigitated Ag electrodes) with detergent, put them in acetone, isopropanol, absolute ethanol, and deionized water for ultrasonic cleaning for 30 minutes;

[0043] 3) Spin-coating the aluminum oxide flat electrode to form a film: dry the cleaned aluminum oxide flat electrode and place it on a spin coater, spin at a spin coating speed of 5000rpm / min for 30s, and the number of spin coatings is 5 times. After the ...

Embodiment 3

[0048] one with H 2 The preparation method of the rod-shaped ZnO / ZIF-8 of sensitive effect has the following steps:

[0049] 1) Preparation of zinc oxide seed layer sol: Weigh 4.4g of zinc acetate dihydrate, dissolve it in 25mL of ethylene glycol methyl ether and stir for 30min, then measure 1.2mL of ethanolamine into the above solution, stir on a magnetic stirrer for 30min to form a transparent Homogeneous sol, stand for 12h for later use;

[0050] 2) Cleaning of flat-plate electrodes: After cleaning the alumina flat-plate electrodes (including interdigitated Ag electrodes) with detergent, put them in acetone, isopropanol, absolute ethanol, and deionized water for ultrasonic cleaning for 30 minutes;

[0051] 3) Spin-coating the aluminum oxide flat electrode to form a film: dry the cleaned aluminum oxide flat electrode and place it on a spin coater, spin at a spin coating speed of 4000rpm / min for 30s, and the number of spin coatings is 4 times. After the completion, remove t...

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Abstract

The invention comprises the following steps: utilizing an alumina plate electrode as a substrate, preparing a ZnO crystal layer on the alumina plate electrode by utilizing a spin-coating method, and then growing ZnO nano rods at the ZnO crystal layer by a hydrothermal method, finally, putting in a mixed solution of 2-methylimidazole and zinc acetate, growing at room temperature to obtain a rod-like ZnO/ZIF-8. The preparation of the rod-like ZnO/ZIF-8 and low temperature H2 sensitive effect of rod-like ZnO/ZIF-8 disclosed by the invention have the advantages that a composite material is prepared at room temperature, so that power consumption is significantly decreased; the prepared rod-like ZnO/ZIF-8 with porous structure forms regular array; extreme high selectivity is provided when a gassensor detects small molecule gases such as H2; the application potentiality is larger.

Description

technical field [0001] The invention relates to the technical field of preparation of nanosensors, in particular to a preparation method of rod-shaped ZnO / ZIF-8 grown on a flat plate electrode in situ and its low-temperature H 2 sensitivity effect. Background technique [0002] ZnO is a typical n-type semiconductor material with an energy band width of 3.7eV. One-dimensional ZnO nanostructures such as nanowires, nanorods, and nanobelts have high specific surface area, good chemical and thermal stability, and thus are widely used in chemically sensitive fields. Among them, the ZnO nanorod structure is usually a single crystal structure with a relatively smooth surface, which has a larger specific surface area and quantum size effect. With the continuous development and application, it has been found that pure phase ZnO gas-sensing materials generally have low selectivity, mainly for various gases such as C 2 h 5 OH, CO, TEA and H 2 etc. have corresponding sensitivities, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G9/02B82Y30/00B82Y40/00
Inventor 宋晓攀曹丙强潘姿羽
Owner UNIV OF JINAN
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