Magnetic nano T102 composite photocatalysis and preparation method

Abstract

A magnetic composite nano-TiO2 photocatalyst able to be recovered magnetically is prepared by sol-gel method. It is composed of Fe3O4 as core, SiO2 as isolating layer and TiO2 as coated layer. It has excellent soft magnetic property, high photocatalyst activity, and high degradability to methyl orange.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, composite materials and magnetic materials, in particular to a kind of magnetic nano-TiO which can be recycled by magnetism 2 Composite photocatalyst and preparation method thereof. Background technique [0002] Nano-TiO for Photocatalytic Degradation 2 There are usually two forms of use: one is to stir the nano-TiO 2 The powder is mixed into the solution, so that the suspension and the photolyzed matter are fully mixed; the second is to mix the nano-TiO 2 Fixed on a certain carrier material to form a fixed shape. [0003] Suspended TiO formed by the first method 2 The specific surface area of ​​the powder is large, the effect of receiving light is good, the photocatalytic efficiency is high, and the reactor is simple, but there are disadvantages such as difficulty in recycling, and it can only be used once, which makes the use cost very high and limits its application and promotion; ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the current problem of suspended nano-TiO 2 Photocatalyst with high photocatalytic efficiency but difficult recovery, a new type of magnetic nano-TiO 2 A photocatalyst and a preparation method thereof. The method uses ferromagnetic particles as a carrier to make a magnetically suspended photocatalyst, which not only has the high efficiency of a suspended photocatalyst, but also can utilize magnetic recovery to overcome the problem of suspended TiO 2 Disadvantages of difficulty in powder recovery