Method for preparing selective gas-permeable membrane coated with metal organic frame and application thereof

A metal-organic framework, selective technology, used in measurement devices, instruments, material analysis by electromagnetic means, etc., can solve the problems of poor measurement accuracy, cross-sensitivity, etc., to improve accuracy, reduce package size, and reduce costs. Effect

Active Publication Date: 2020-02-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of cross-sensitivity in semiconductor gas sensors in the prior art, resulting in poor measurement accuracy, the present invention provides a method for preparin

Method used

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  • Method for preparing selective gas-permeable membrane coated with metal organic frame and application thereof
  • Method for preparing selective gas-permeable membrane coated with metal organic frame and application thereof
  • Method for preparing selective gas-permeable membrane coated with metal organic frame and application thereof

Examples

Experimental program
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Example Embodiment

[0045] Example 1

[0046] A method for preparing a selective gas permeable membrane coated with a metal-organic framework. First, the surface of the waterproof gas permeable membrane is sputtered under a power of 120W for 2 hours by a magnetron sputtering method to grow a layer of zinc oxide on the surface of the waterproof gas permeable membrane. film; then, add 1g of 2-methylimidazole and 20ml of methanol to make a solution in the reaction kettle, then place the waterproof breathable membrane with the zinc oxide film in the reaction kettle equipped with the solution, and hydrothermally react at 120 ° C 12h, ZIF-8 was synthesized in situ on the surface of the breathable membrane by the hydrothermal method, and a dense ZIF-8 film was grown on the surface of the waterproof and breathable membrane. X gas selectivity.

Example Embodiment

[0047] Example 2

[0048] A method for preparing a selective gas permeable membrane coated with a metal organic framework. First, the surface of the waterproof gas permeable membrane is sputtered at a power of 20W for 3 hours by a magnetron sputtering method to grow a layer of cobalt oxide on the surface of the waterproof gas permeable membrane. film; then, in the reactor, add the 2-methylimidazole solution of 20ml, the concentration of the solution is 0.1mmol / L, and the solvent is ethanol, and then the waterproof breathable membrane with the cobalt oxide film is placed in the reactor equipped with the solution During the hydrothermal reaction at 10 °C for 24 h, ZIF-67 was synthesized in situ on the surface of the breathable membrane by the hydrothermal method, so that a dense ZIF-67 film was grown on the surface of the waterproof and breathable membrane. X gas selectivity.

Example Embodiment

[0049] Example 3

[0050] A preparation method of a porous film coated with a metal-organic framework. First, by magnetron sputtering on the surface of the waterproof and breathable film, sputtering at a power of 150W for 30 minutes, so that a layer of copper oxide film grows on the surface of the waterproof and breathable film; then , add 0.5mmol of 1,3,5-benzoic acid (H 3 BTC), 10ml of ethanol and 5ml of DMF were mixed to form a mixed solution, and then the waterproof breathable membrane with the copper oxide film was placed in the reactor containing the solution, and the hydrothermal reaction was carried out at 150 ° C for 10min. In-situ synthesis of Cu-BTC on the surface makes a dense Cu-BTC thin film grow on the surface of the waterproof and breathable membrane, and the Cu-BTC thin film can improve the selectivity to ammonia gas.

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Abstract

The present invention discloses a method for preparing a selective gas-permeable membrane coated with a metal organic frame and application thereof. The selective gas-permeable membrane coated with the MOF covers, in a sealing manner, the top of a tube that contains a gas sensor, so that selectivity of the gas sensor for gases is implemented, and gas detection accuracy is improved. In addition, gas sensors for detecting different gases can be placed in different chambers of the tube that contains the gas sensors. MOF thin films corresponding to different chambers are different, so that mixturegases selectively pass, thereby improving selectivity of the gas sensors for detected gases. An electrode of the gas sensor is connected to a conductive contact in the tube through lead bonding, so that an electrical signal of the gas sensor is transmitted to an external circuit, packaging of the gas sensor is facilitated, package dimensions are reduced, and costs are lowered.

Description

technical field [0001] The invention belongs to the technical field of packaging of electronic devices, and in particular relates to a preparation method and application of a selective gas permeable membrane coated with a metal organic framework. Background technique [0002] With the rapid development of industrialization, the problem of environmental pollution is becoming more and more serious. At the same time, with the improvement of people's living standards and the increasing emphasis on environmental protection, the detection of various toxic and harmful Higher requirements are put forward for the monitoring of food and the detection of the quality of the living environment. Gas sensors, as one of the sensory or signal input parts, are becoming more and more widely used in industrial detection, home life, food storage, medical and health and other fields. Applications. [0003] At present, there are many kinds of gas sensors, which can be roughly divided into semicon...

Claims

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Application Information

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IPC IPC(8): G01N27/12C08G83/00
CPCC08G83/008G01N27/126
Inventor 刘卫华卜祥瑞马发吴海洋李昕王小力
Owner XI AN JIAOTONG UNIV
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