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Non-metal N doped one-dimensional nano-structured Ti0* visible light catalyst 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, and accelerate transmission Quality, improve the effect of photocatalytic efficiency

Active Publication Date: 2009-06-24
ZHEJIANG ZHONGDE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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Experimental program
Comparison scheme
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, treated with ultrasonic waves, 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.

[004...

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 hydrotitanic acid and dopant 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 a diameter...

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 evenly, ultrasonically treated, 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 of about 0.7 ...

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Abstract

The invention discloses a non-metallic N-doped one-dimensional nanostructure TiO2 visible light catalyst, which is prepared by the following method: (1) adopting a hydrothermal method to prepare nano-TiO2 powder, TiO2 colloid or Ti(OH)4 with an alkali solution into a mixed suspension for hydrothermal reaction; (2) after the hydrothermal reaction is completed, cool, filter out the precipitate, and wash to obtain white hydrotitanic acid; (3) mix hydrotitanic acid, doped nitrogen source and water into a mixed suspension, ultrasonically treated after stirring, and dried to obtain a uniform mixture of hydrotitanic acid and doped nitrogen source; (4) calcining the homogeneous mixture of hydrotitanic acid and doped nitrogen source to obtain non-metallic N-doped one-dimensional nano Structure TiO2 Visible Light Catalyst. The catalyst of the present invention has a one-dimensional structure with rich active sites, which can accelerate the mass transfer of pollutants to the catalytic material, thereby improving the photocatalytic efficiency; the special one-dimensional structure and the doping of non-nitrogen metal make it have excellent 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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J27/24
Inventor 吴忠标董帆赵伟荣官宝红刘越
Owner ZHEJIANG ZHONGDE IND
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