Novel graphene-molecular sieve composite gas purifying material and preparation method thereof

Abstract

A preparation method of a novel graphene-molecular sieve composite gas purifying material comprises the following steps: 1) activating a 3A molecular sieve; 2) activating a graphene oxide, and obtaining a graphene suspension through ultrasonic dispersion; 3) adding the activated 3A molecular sieve and the graphene suspension into a hydrothermal reaction kettle according to a mass ratio ranging from (1:5) to (1:20), performing a hydrothermal reaction for 8-12h at 180-220 DEG C, filtering and drying a reaction product, and vacuumizing in a vacuum drying box to obtain the graphene-molecular sieve composite gas purifying material. The graphene-molecular sieve composite gas purifying material prepared according to the preparation method solves the problems in aspects of the specific surface area and the selectivity of the conventional adsorbent material, and has permanent porosity and pore diversity. The invention further provides the novel graphene-molecular sieve composite gas purifying material prepared according to the preparation method.

Description

technical field [0001] The invention relates to the field of compound molecular sieve preparation, in particular to a novel graphene-molecular sieve composite gas purification material and a preparation method thereof. Background technique [0002] Zeolite (zeolite) molecular sieve is a very important microporous material. Its spatial network structure is composed of silicon-oxygen tetrahedral units and aluminum-oxygen tetrahedral units. As a crystalline aluminosilicate, it has abundant pores. and uniform pore size distribution. Due to its large number of voids and large specific surface area, it is widely used in gas filtration and adsorption. [0003] Graphene is a new type of material with a two-dimensional sheet-like single-layer structure composed of carbon atoms, in which the carbon atoms are represented by sp 2 The hybrid orbitals form a hexagonal honeycomb structure. Graphene material has strong mechanical toughness, good acid and alkali resistance, high flexibili...

AI Technical Summary

Problems solved by technology

But there are following problems—the above-mentioned methods all involve a large amount of chemical reagents. If the excess reagents are not completely removed, it may not only interfere with the gas purification process, but also easily cause secondary pollution during the gas purification process, and even affect human health

In addition, the most common adsorbents in the field of adsorption include activated carbon, molecular sieve, silica gel and other materials. Although these inorganic adsorption materials are cheap in cost, easy to prepare, and do not have a large amount of pollution and interference from chemical reagents, they are limited by the specific surface area. The problem is that its adsorption capacity is limited and there are few substances selectively adsorbed.