Preparation method of nitrogen-doped silicon-aluminum immobilized TiO2 porous ceramic

A technology of porous ceramics and nitrogen doping, applied in the field of photocatalytic materials, can solve the problems of high cost, complex gas phase method equipment, and high energy consumption, and achieve the effect of effective doping, increasing photocatalytic activity, and increasing porous structure
CN102408246AInactive Publication Date: 2012-04-11SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2012-04-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of nitrogen-doped silicon-aluminum immobilized TiO2 porous ceramic. The preparation method comprises the steps of: carrying out reaction with water-soluble inorganic silicon salt as a silicon source, water-soluble inorganic titanium salt as a titanium source, water-soluble inorganic aluminum salt as an aluminum source, urea as a nitrogen source and cetyl trimethyl ammonium bromide as a template agent to obtain a suspension D, transferring the suspension to a hydrothermal kettle, carrying out hydrothermal reaction, after hydrothermal reaction is finished, washing, carrying out suction filtering to obtain filter mud, granulating and shaping the filter mud, then drying to obtain nitrogen-doped silicon-aluminum immobilized TiO2 precursor, and sintering the nitrogen-doped silicon-aluminum immobilized TiO2 precursor to obtain the nitrogen-doped silicon-aluminum immobilized TiO2 porous ceramic. According to the invention, urea is used as the nitrogen source, under hydrothermal high-temperature and high-pressure conditions, N-H bond in urea can replace oxygen in Ti-O to firmly bond in a chemical bond form, thus effective doping is achieved; and in addition, lattice distortion generated due to nitrogen entering TiO2 lattice can broaden photoresponse range of TiO2 and increase photocatalysis activity under visible light.
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Description

technical field

[0001] The invention belongs to the technical field of photocatalytic materials, in particular to a nitrogen-doped silicon-aluminum immobilized TiO 2 Porous ceramics (N / TiO 2 - SiAl) preparation method. Background technique

[0002] TiO 2 As a cheap, non-toxic, energy-saving and high-efficiency photocatalytic material, it can not only effectively degrade organic pollutants in the air and water, but also not cause secondary pollution to the human body and the environment. catalyst. At the same time, TiO 2 It also has a killing effect on germs in the air, and can also be widely used in air purification treatment in hospitals, vehicles and ships, and farms. But due to TiO 2 It is a wide-bandgap semiconductor with low utilization rate of light energy. It can only absorb and utilize ultraviolet light that accounts for 3% to 4% of the sunlight on the earth's surface, and accounts for the vast majority of visible light in the sunlight spectrum (about 45% of th...

Claims

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