Method of preparing ordered porous titanium oxide doped with nitrogen

A technology of porous titanium dioxide and titanium oxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of uneven pore size of porous titanium dioxide, complex preparation process, poor stability of powder catalyst, etc. Poor stability, simple preparation process, and the effect of overcoming easy poisoning

Inactive Publication Date: 2007-08-08
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0007] The object of the present invention is to provide a porous titanium dioxide prepared in the prior art with the disadvantages of uneven pore size, easy destruction of the porous structure, complex preparation process, lack of visible light photocatalysis, poor stability of powder catalyst, and easy poisoning. A method for preparing ordered porous titanium dioxide micropowders, using monodisperse polymer microspheres as templates to prepare ordered porous titanium dioxide micropowders, and combining nitrogen plasma irradiation technology to do nitrogen doping on ordered porous titanium dioxide micropowders to prepare organic Sequenced Porous Titanium Nitroxide Powder

Method used

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  • Method of preparing ordered porous titanium oxide doped with nitrogen

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Embodiment 1

[0019] Disperse 1.5g of monodisperse PS microspheres in 15g of formamide. After the PS microspheres are fully dispersed, add 5g of hexane and 0.01g of butyl titanate, stir thoroughly for 6h, and then volatilize naturally in the air to remove the hexane. Then add 5g of water to hydrolyze butyl titanate. After the hydrolysis is completed, use a G4 sand core funnel to carry out suction filtration. Put the composite of titanium dioxide and monodisperse PS microspheres obtained after suction filtration into a vacuum oven and dry at 60°C. 12h, and then sintered at 500°C for 5h to remove monodisperse PS microspheres to obtain ordered porous titanium dioxide micropowders; then put the ordered porous titanium dioxide micropowders into a microwave plasma generator, and evacuate to a vacuum degree of 45 mm Hg, Pass nitrogen gas into the microwave plasma generator, adjust the nitrogen flow rate to 10cm 3 / min, microwave power 200W, temperature 500°C, and irradiation treatment for 60min, t...

Embodiment 2

[0021] Disperse 1.1 g of monodisperse PS microspheres in 20 g of formamide. After the PS microspheres are fully dispersed, add 4 g of hexane and 0.01 g of methyl titanate, stir thoroughly for 6 hours, and then volatilize naturally in the air to remove the hexane. Then add 7g of water to hydrolyze methyl titanate. After the hydrolysis is completed, use a G4 sand core funnel to carry out suction filtration. Put the composite of titanium dioxide and monodisperse PS microspheres obtained after suction filtration into a vacuum oven and dry at 60°C. 12h, and then sintered at 500°C for 5h to remove monodisperse PS microspheres to obtain ordered porous titanium dioxide micropowders; then put the ordered porous titanium dioxide micropowders into a microwave plasma generator, and evacuate to a vacuum degree of 45 mm Hg, Pass nitrogen gas into the microwave plasma generator, adjust the nitrogen flow rate to 20cm 3 / min, microwave power 500W, temperature 500°C, and irradiation treatment f...

Embodiment 3

[0023] Disperse 0.1g of monodisperse PMMA microspheres in 12g of formamide. After the PMMA microspheres are fully dispersed, add 3g of hexane and 0.02g of ethyl titanate, stir thoroughly for 6h, and then volatilize naturally in the air to remove hexane. Then add 5g of water to hydrolyze the ethyl titanate. After the hydrolysis is completed, use a G4 sand core funnel to carry out suction filtration. Put the composite of titanium dioxide and monodisperse PMMA microspheres obtained after suction filtration into a vacuum oven and dry at 60°C. 12h, and then sintered at 500°C for 5h to remove monodisperse PMMA microspheres to obtain ordered porous titanium dioxide micropowders; then put the ordered porous titanium dioxide micropowders into a microwave plasma generator, and evacuate to a vacuum degree of 45 mm Hg, Pass nitrogen gas into the microwave plasma generator, adjust the nitrogen flow rate to 30cm 3 / min, microwave power 600W, temperature 300°C, and irradiation treatment for ...

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Abstract

The invention discloses a making method of sequent porous aza-titanium oxide micro-powder, which comprises the following steps: 1. dispersing single dispersion polymer microball into formamide; hydrolyzing titanium alkoxide to gather single dispersed polymer to form titania/single dispersed microball composition; 2. removing single dispersed polymer microball mould; making the sequent porous titania micro-powder; 3. placing the micro-powder into microwave plasma generator; extracting into vacuum with vacuum degree less than 50mm mercury column; aerating nitrogen into microwave plasma generator; adjusting nitrogen flow speed to 10-50cm3/min and microwave power at 200-1000W under 200-500 deg.c; irradiating for 1-60 min; obtaining the product.

Description

technical field [0001] The invention belongs to the field of porous photocatalytic materials, and in particular relates to a method for preparing ordered porous nitrogen heterotitanium oxide micropowder. Background technique [0002] Anatase nano-titanium dioxide can decompose toxic chemicals, smog residues, odorous chemicals, dirt, irritants, bacteria, etc. into non-toxic and non-polluting substances by ultraviolet light irradiation. When ultraviolet (wavelength <388nm) irradiation The electrons in its valence band are excited to form negatively charged highly active electrons, and at the same time generate positively charged valence band holes. The electrons and holes are separated and migrate to different positions on the particle surface. The holes and electrons react with water and oxygen on the surface, respectively, to generate highly reactive hydroxyl radicals and superoxide ion radicals, which can efficiently decompose toxic chemicals. Therefore, it has aroused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 刘长生李俊邓仕英韦磊周爱军
Owner WUHAN INSTITUTE OF TECHNOLOGY
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