Magnetic nano T102 composite photocatalysis and preparation method

A magnetic nano, composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult powder recycling, high photocatalytic efficiency, and difficult recycling.

Inactive Publication Date: 2005-01-12
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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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 ferroma

Method used

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Embodiment Construction

[0033] The present invention proposes a novel magnetic nano-TiO 2 / SiO 2 / Fe 3 o 4 Composite photocatalyst material (photocatalytic activity comes from nano-TiO on the surface 2 Catalyst layer), in the laboratory, the following formula is adopted during its specific production and implementation:

[0034] (1), in Fe 3 o 4 The surface of the substrate is coated with SiO 2

[0035] Nano Fe 3 o 4 Powder: 0.2g Water: 5ml

[0036] Ammonia (NH 3 Content is 25%~28%): 40ml

[0037] Absolute ethanol: 400ml? Ethyl orthosilicate: 0.004mol

[0038] (2), in SiO 2 / Fe 3 o 4 Composite particles coated with TiO 2

[0039] SiO 2 / Fe 3 o 4 Composite particles: 0.2g Absolute ethanol: 450ml

[0040] Water: 50ml Tetra-n-butyl titanate: 0.006mol

[0041] Preparation of the above-mentioned magnetic nano-TiO 2 Composite photocatalyst, also known as TiO 2 / SiO 2 / Fe 3 o 4 A magnetic photocatalyst comprising the steps of:

[0042] (1), first in Fe 3 o 4 The surface of the ...

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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; ...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 陈建军廖振华
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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