Method for preparing ionic liquid/transition metal disulphide gas separating membrane and application thereof

A gas separation membrane, ionic liquid technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as poor stability, and achieve the effects of increasing stability, improving separation performance, and significantly gas separation performance.
CN106902648AInactive Publication Date: 2017-06-30ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2017-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing an ionic liquid / transition metal disulphide gas separating membrane and an application thereof. The method comprises the following steps: 1 ) transition metal disulphide powder MS2 (M means corresponding transition metal) and n-butyllithium are mixed to obtain the lithium intercalated transition metal disulphide powder LixMS2; 2) adding the LixMS2 into ionic liquid for ultrasonic mixing to obtain the MS2 ionic liquid dispersion liquid; and 3) performing vacuum pumping filtration on the dispersion liquid to obtain the required ionic liquid / transition metal disulphide gas separating membrane which is used for gas separation. The LixMS2 is interacted with ionic liquid during an ultrasonic process to form a MS2 two-dimensional layered material, the ionic liquid is subjected to in-situ introduction to the intermediate of a two-dimensional sheet layer; LiBF4 generated in ultrasound can increase the CO2 separating performance of a composite film; and ionic liquid confined effect and difference of different gas solubility are used for realizing the gas separating. The prepared gas separating membrane has high application value as well as concise and efficient preparation process.
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Description

technical field

[0001] The invention relates to the preparation and application of a gas separation composite membrane, in particular to an ionic liquid / transition metal disulfide gas separation membrane and its application. Background technique

[0002] Gas separation membranes have been widely used in industrial production, such as separating H from biochemicals 2 , to separate CO from natural gas 2 , enrichment of water vapor, etc. Among them, two-dimensional layered materials such as graphene and graphene oxide have unique nanoscale channels, which have become a hot spot in the preparation of gas separation membranes. A large number of studies have shown that graphene and graphene oxide have good selectivity and good gas separation performance; however, there are very few studies on graphene-like two-dimensional materials as gas separation membranes.

[0003] Transition metal dichalcogenides such as molybdenum disulfide and tungsten disulfide can be prepared by simple...

Claims

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