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Cation S and anion N doped one-dimensional nano-structured Ti0* photocatalyst and method of producing the same

A nanostructure and photocatalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem that visible light cannot be used to degrade environmental pollutants, and achieve excellent visible light catalytic activity and large absorption Effect that range, activity is high

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

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Problems solved by technology

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

Method used

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  • Cation S and anion N doped one-dimensional nano-structured Ti0* photocatalyst and method of producing the same
  • Cation S and anion N doped one-dimensional nano-structured Ti0* photocatalyst and method of producing the same
  • Cation S and anion N doped one-dimensional nano-structured Ti0* photocatalyst and method of producing the same

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Effect test

Embodiment 1

[0038] 2.0 g nano-TiO 2 The powder is placed in 70ml of 10mol / L NaOH solution, and continuously stirred 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, and wash with 0.05mol / L hydrochloric acid solution and deionized water to obtain a white precipitate of hydrotitanic acid. Prepare the above hydrotitanic acid and doping source thiourea in a certain ratio (1:2) with absolute ethanol to form a mixed suspension, stir evenly, ultrasonically treat, and dry at 80°C for 10 hours to obtain a homogeneous mixture of hydrotitanic acid and thiourea . The above mixture was placed in a tube furnace and calcined at 400 °C for 2 h under anaerobic conditions to obtain cation S and anion N double-doped one-dimensional nanostructured TiO 2 , the doping amount of sulfur is 0.9%, the doping amount of nitrogen is 1.2%, the crystal form is anatase, and the shape is a nanotube with a length of...

Embodiment 2

[0042] 3.0 g nano-TiO 2 The powder is placed in 60ml of 12mol / L KOH solution and continuously stirred to obtain 2 mixed solution. Transfer the above solution to a 100ml autoclave, keep the temperature at 180°C for 36 hours, cool, pour off the supernatant, wash with 6.5mol / L sulfuric acid solution and deionized water, and obtain a white precipitate of hydrotitanic acid. Prepare the above hydrotitanic acid and doping source thiourea in a certain ratio (1:4) with absolute ethanol to form a mixed suspension, stir for a certain period of time, ultrasonically treat, and dry at 100°C for 8 hours to obtain a homogeneous mixture of hydrotitanic acid and thiourea mixture. The above mixture was placed in a tube furnace and calcined at 500 °C for 1.5 h under aerobic conditions to obtain cation S and anion N double-doped one-dimensional nanostructured TiO 2 , the doping amount of sulfur is 1.5%, the doping amount of nitrogen is 1.8%, the crystal form is anatase, and the shape is a nanow...

Embodiment 3

[0045] 5.0 g TiO 2 Colloid is placed in the 15mol / LNaOH solution 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 3.0mol / L nitric acid solution and deionized water, and obtain a white precipitate of hydrotitanic acid. Prepare the above hydrotitanic acid and doping source thiourea in a certain ratio (1:1) with absolute ethanol to form a mixed suspension, stir for a certain period of time, ultrasonically treat, and dry at 60°C for 12 hours to obtain a homogeneous mixture of hydrotitanic acid and thiourea mixture. The above mixture was placed in a tube furnace and calcined at 550 °C for 3 h under aerobic conditions to obtain cation S and anion N double-doped one-dimensional nanostructured TiO 2 , the doping amount of sulfur is 0.5%, the doping amount of nitrogen is 0.8%, the crystal form is anatase, and the sh...

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Abstract

The invention discloses a cation S and anion N double-doped one-dimensional nanostructure TiO2 photocatalyst. The preparation method is as follows: (1) using a hydrothermal method, nano-TiO2 powder, TiO2 colloid or Ti(OH)4 and alkali The solution is made into a mixed suspension for hydrothermal reaction; (2) cooling, filtering out the precipitate, and washing to obtain white hydrotitanic acid; (3) preparing a mixed suspension with hydrotitanic acid, thiourea and solvent, stirring After ultrasonic treatment, drying to obtain a homogeneous mixture of hydrotitanic acid and thiourea; (4) calcining the homogeneous mixture of hydrotitanic acid and thiourea to obtain cation S and anion N double-doped one-dimensional nanostructure TiO2 photocatalyst. The catalyst of the invention has a one-dimensional structure and abundant active sites, which is beneficial to the improvement of the reaction activity. It can accelerate the mass transfer of pollutants to the catalytic material, thereby improving the photocatalytic efficiency; the special one-dimensional structure and non-metal double doping make it have excellent visible light catalytic activity.

Description

technical field [0001] The invention relates to a cation S and anion N double-doped one-dimensional nanostructure TiO 2 The preparation method and application of photocatalytic degradation of organic matter. The catalyst is mainly used in the technical field of indoor air pollution control. Background technique [0002] Indoor air pollution is 5-10 times higher than outdoor, and people spend 80-90% 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 people's living standards, especially the rapid development of the building materials industry and the rise of decoration, the pollution caused by decoration materials has become the main form of indoor pollution. [0003] Western developed countries have promulgated laws and regulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06A61L9/22
Inventor 吴忠标董帆赵伟荣王海强郭森
Owner ZHEJIANG ZHONGDE IND
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