Preparation method of novel crown ether COF material and application thereof in lithium ion adsorption

Abstract

This invention relates to the field of adsorption separation, and particularly to a method for preparing a novel crown ether COF material and its application in lithium-ion adsorption. The method for preparing this novel crown ether COF material includes the following steps: mixing 1,3,5-trimethyltriazine, 2,3,5,6,8,9-hexahydrobenzo[b][1,4,7,10]tetraoxane-11,14-dicarboxaldehyde, sodium hydroxide, trimethylbenzene, and methanol and reacting them to obtain the novel crown ether COF material. This invention successfully designed and prepared a novel crown ether COF material, COF-CQWU-5, which possesses advantages such as high specific surface area and porosity, excellent chemical stability, mild reaction conditions, simple reaction route, high adsorption performance, and cyclic adsorption; it exhibits a high adsorption capacity for lithium ions, with a saturated adsorption capacity as high as 850.7 mg / g.

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