Preparation method of composite molecular sieve material with photocatalysis performance

Abstract

A preparation method of a composite molecular sieve material with a photocatalysis performance is characterized in that the method comprises the following steps: carrying out ion exchange on Y, X or ZSM-5 molecular sieve by hydrochloric acid, and loading a TiO2 photocatalyst on the obtained molecular sieve through a sol-gel process. The composite molecular sieve material can inhibit electron-hole pair recombination to make organic matters adsorbed on the molecular sieve easily obtain free active groups in order to improve the photocatalytic activity of the photocatalyst.

Description

technical field [0001] The invention belongs to the field of water purification functional materials, and in particular relates to a preparation method of a composite molecular sieve material with photocatalytic performance. Background technique [0002] Molecular sieve is a kind of aluminosilicate, which uses silicon-oxygen tetrahedron as the basic structural unit, and the oxygen bridge formed by oxygen atoms connects the silicon-oxygen tetrahedron to form an anion skeleton with a regular cage or pore structure. Molecular sieve TO 4 (T is usually Si or Al atom) The tetrahedron is connected to each other through the oxygen atoms at the vertices to form a multi-component ring structure. These polycyclic rings constitute the pores in the molecular sieve, and their effective diameter is called the pore size. On the basis of the ring, it is connected to become a skeleton of three-dimensional space, and the cavity surrounded by it is called a cage. These different cages are pe...

AI Technical Summary

Problems solved by technology

Anatase phase TiO 2 Although it has excellent photocatalytic activity, this crystal form of TiO 2 The poor adsorption capacity limits its further application.