Novel Polymer-COF-rGO composite membrane and preparation method thereof

Abstract

The invention discloses a novel Polymer-COF-rGO composite membrane and a preparation method thereof. The preparation method comprises the steps that firstly, a COF monomer containing a polymer is prepared from a COF monomer and a linear Polymer, then the COF monomer, another COF monomer containing an amino group and graphene oxide (GO) are mixed and ground, DMF and acetic acid are added, then a heating reaction is conducted, and the novel Polymer-COF-rGO composite membrane is formed. In the synthesis reaction, two COF monomers form a COF material, added graphene oxide (GO) is reduced in-situ in a DMF solution and forms a covalent bond with amino in the COF material to be connected between rGO and COF at the same time under the heating condition, and in-situ growth of an rGO (reduced graphene oxide) membrane layer on the COF membrane layer is achieved. Due to the fact that the Polymer and the COF membrane layer are connected through covalent bonds, and the COF and the rGO membrane layer are connected through covalent bonds, the two types of 2D materials are effectively and tightly combined together, a bridging effect is achieved, and separation of COF photo-induced charges and migration of photo-induced electrons to rGO are improved.

Description

technical field [0001] The invention belongs to the technical field of film photocatalytic materials, and in particular relates to a novel Polymer-COF-rGO composite film and a preparation method thereof. Background technique [0002] As a new energy source, hydrogen has intriguing advantages, such as high-energy fuel density, renewability, and environmental friendliness, and thus is considered as an ideal substitute for fossils. Photocatalytic water splitting for hydrogen, one of the most promising technologies for producing hydrogen, has attracted extensive attention from researchers. [0003] In recent years, covalent organic frameworks (COFs), as polymers assembled by covalent bonds of crystalline and porous organic matter, have shown excellent performance in photocatalytic hydrogen production. COF materials have clear crystalline properties, its structural information, intrinsic porosity, excellent visible light harvesting ability, and structural and bandgap design, end...

AI Technical Summary

Problems solved by technology

However, there are still some problems in this hybrid material, such as the strong hydrophobicity of the pore size of the membrane material, which leads to a small contact area with the reaction substrate water, and the mechanical strength and stability of the composite membrane need to be improved, etc.

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