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Non-metal N doped one-dimensional nano-structured Ti0* visible light catalyzer and method for producing the same

A nanostructured, non-metallic technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as the inability to use visible light to degrade environmental pollutants, achieve rich active sites, reduce treatment Cost, the effect of accelerating mass transfer

Active Publication Date: 2008-04-02
ZHEJIANG ERMA ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent document with the publication number CN1699636 (invention name: preparation method of one-dimensional single crystal titanium dioxide nanomaterial) discloses a method of combining hydrothermal treatment with subsequent treatment to synthesize one-dimensional single crystal TiO 2 , but the material only responds to ultraviolet light and cannot use visible light to degrade environmental pollutants

Method used

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  • Non-metal N doped one-dimensional nano-structured Ti0* visible light catalyzer and method for producing the same
  • Non-metal N doped one-dimensional nano-structured Ti0* visible light catalyzer and method for producing the same
  • Non-metal N doped one-dimensional nano-structured Ti0* visible light catalyzer and method for producing the same

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Experimental program
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Effect test

Embodiment 1

[0040] 2.0 g nano-TiO 2 The powder is placed in 70ml of 10mol / L NaOH solution and kept stirring to obtain 2 mixed solution. Transfer the above solution to a 100ml autoclave, keep the temperature at 150°C for 24 hours, cool, pour off the supernatant clear night, wash with 0.5mol / L hydrochloric acid solution and deionized water, and obtain a white precipitate of hydrotitanic acid. The above-mentioned hydrotitanic acid and doping source urea were mixed with water in a certain ratio (1:2) to form a mixed suspension, stirred evenly, ultrasonically treated, and dried at 80° C. for 10 hours to obtain a homogeneous mixture of hydrotitanic acid and urea. The above mixture was placed in a tube furnace and calcined at 400 °C for 2 h under anaerobic conditions to obtain a non-metallic N-doped one-dimensional nanostructured TiO 2 , the doping amount of nitrogen is 1.3%, the crystal form is anatase, the shape is nanotube, the length is about 1 micron, and the diameter is 8nm.

[0041] Un...

Embodiment 2

[0044] 4.5 g nano-TiO 2 The powder is placed in 80ml of 12mol / L KOH solution and kept stirring to obtain 2 mixed solution. Transfer the above solution to a 100ml autoclave, keep the temperature at 130°C for 48 hours, cool, pour off the upper clear layer, and wash with 2.5mol / L sulfuric acid solution and deionized water to obtain a white precipitate of hydrotitanic acid. The above-mentioned hydrotitanic acid and doping source ethylamine were mixed with water in a certain ratio (1:4) to form a mixed suspension, stirred for a certain period of time, ultrasonically treated, and dried at 100°C for 8 hours to obtain a homogeneous mixture of hydrotitanic acid and ethylamine. The above mixture was placed in a tube furnace and calcined at 500 °C for 1.5 h under aerobic conditions to obtain a non-metallic N-doped one-dimensional nanostructured TiO 2 , the doping amount of nitrogen is 1.8%, the crystal form is anatase, and the shape is a nanowire with a length of about 1.5 microns and ...

Embodiment 3

[0046] 5.0 g TiO 2 The colloid is placed in the NaOH solution of 15mol / L of 140ml, keeps stirring, obtains containing TiO 2 Colloidal mixed solution. Transfer the above solution to a 200ml autoclave, keep the temperature at 120°C for 48 hours, cool, pour off the upper clear layer, wash with 0.2mol / L nitric acid solution and deionized water, and obtain a white precipitate of hydrotitanic acid. The above-mentioned hydrotitanic acid and doping source ammonium carbonate were mixed with water in a certain ratio (1:1) to form a mixed suspension, stirred uniformly, treated with ultrasonic waves, and dried at 60° C. for 12 hours to obtain a homogeneous mixture of hydrotitanic acid and ammonium carbonate. The above mixture was placed in a tube furnace and calcined at 550 °C for 3 h under aerobic conditions to obtain a non-metallic N-doped one-dimensional nanostructured TiO 2 , the nitrogen doping amount is 0.6%, the crystal form is anatase, and the shape is a nanowire with a length o...

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Abstract

The invention discloses visible light catalyst of one dimension nanometer structure TiO2 adulterated with non-metal N, which is prepared with the following method: (1) with hydro-thermal method, nanometer TiO2 powder, TiO2 colloid or Ti(OH)4 and alkaline solution is mixed to form mixed suspension for water-thermal reaction; (2) after water-thermal reaction is finished, cooling is adopted, sediment is filtered and cleaned, and then white hydrogen titanium acid is realized; (3) hydrogen titanium acid, doping nitrogen source and water is mixed to form mixed suspension, ultrasound treatment is conducted after stirring, and then uniform mixture of hydrogen titanium acid and doping nitrogen source is realized after drying; (4) uniform mixture of hydrogen titanium acid and doping nitrogen source is calcinated and then visible light catalyst of one dimension nanometer structure TiO2 adulterated with non-metal N is realized. Catalyst provided by the invention has one dimension structure and lavish active point position and can accelerate mass transfer of pollutant to catalyst, and therefore photocatalysis rate is improved; special one dimension structure and non-nitrogen metal adulteration of the invention lead to good visible-light catalytic activity.

Description

technical field [0001] The invention relates to a nano-TiO applied in the field of indoor air pollution control 2 Catalysts, especially a kind of non-metallic N-doped one-dimensional nanostructure TiO 2 Visible light catalyst and preparation method thereof. Background technique [0002] Indoor air pollution is generally 5 to 10 times higher than outdoors, and people spend 80 to 90% of their time indoors. To some extent, the impact of air pollution on human health is mainly indoors. According to the survey provided by China Standardization Association: 60% of diseases are caused by indoor air pollution. In the late 1990s, with the domestic housing reform and the improvement of national living standards, especially the rapid development of the building materials industry and the rise of decoration fever, the pollution caused by decoration materials has become the main form of indoor pollution. [0003] Under the current living conditions in our country, the curative rate an...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J27/24
Inventor 吴忠标董帆赵伟荣官宝红刘越
Owner ZHEJIANG ERMA ENVIRONMENT TECH CO LTD
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