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Load type nitrogen intermingle with one-dimensional structure TiO2 and preparation method thereof

A nitrogen-doped, three-dimensional structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, disinfection, etc., can solve the problems of insufficient visible light activity, short service life, and easy detachment of photocatalysts, etc., to achieve enhanced reactions The effect of mass transfer process, long service life and abundant active sites

Active Publication Date: 2008-10-08
ZHEJIANG ZHONGDE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping one-dimensional structure TiO with supported non-metallic nitrogen 2 The application of photocatalysts in the treatment of indoor air pollutants solves the problems that general photocatalysts are easy to fall off, the service life is not long, and the visible light activity is not high enough

Method used

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  • Load type nitrogen intermingle with one-dimensional structure TiO2 and preparation method thereof
  • Load type nitrogen intermingle with one-dimensional structure TiO2 and preparation method thereof
  • Load type nitrogen intermingle with one-dimensional structure TiO2 and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Set the area to 50cm 2 The metal Ti flakes were placed in a 10 mol / L NaOH solution and stirred continuously to obtain a mixed solution containing the metal Ti flakes. Transfer the above solution to an autoclave, keep the temperature at 150°C for 24 hours, cool, pour off the supernatant, and wash with 0.1mol / L dilute hydrochloric acid solution and deionized water to obtain flakes with a white surface. Immerse the white flakes in 0.5mol / L hydrochloric acid solution, let it stand for 24 hours, take out the flakes, and put them in a place containing NH 4 + In the solution, the solution concentration is 5mol / L, stand still for 24 hours. Take out the flakes, place them in a muffle furnace, and calcine them at 400°C for 2 hours under aerobic conditions to obtain a supported nitrogen-doped one-dimensional structure TiO 2 nanotube.

Embodiment 2

[0039] Set the area to 25cm 2 The metal Ti flakes were placed in 8 mol / L NaOH solution and stirred continuously to obtain a mixed solution containing the metal Ti flakes. Transfer the above solution to an autoclave, keep the temperature at 180°C for 12 hours, cool, pour off the supernatant, wash with 0.2mol / L dilute nitric acid solution and deionized water, and obtain a white sheet. Immerse the white flakes in 0.5mol / L nitric acid solution, let it stand for 12 hours, take out the flakes, and place them in 4 + In the solution, the solution concentration is 3mol / L, stand for 16 hours. Take out the flakes, place them in a muffle furnace, and calcinate at 500°C for 1 hour under oxygen-free conditions to obtain a supported nitrogen-doped one-dimensional structure TiO 2 Nanowires.

Embodiment 3

[0041] Set the area to 10cm 2 The metal Ti flakes were placed in a 15mol / L KOH solution and stirred continuously to obtain a mixed solution containing the metal Ti flakes. Transfer the above solution to an autoclave, keep the temperature at 160°C for 36 hours, cool, pour off the supernatant, wash with 0.5mol / L dilute sulfuric acid solution and deionized water, and obtain a white sheet. Immerse the white flakes in 0.3mol / L sulfuric acid solution, let it stand for 18 hours, take out the flakes, and put them in a place containing NH 4 + In the solution, the solution concentration is 6mol / L, stand for 8 hours. Take out the flakes, place them in a muffle furnace, and calcinate at 450°C for 3 hours under aerobic conditions to obtain a supported nitrogen-doped one-dimensional structure TiO 2 nanobelt.

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Abstract

The invention discloses a photocatalyst of loaded nonmetal nitrogen doping one-dimensional TiO2 for exciting visible light and a preparation method thereof. In the method, a metal Ti plate and concentrated alkaline solution is taken as the main raw materials, visible light photocatalyst of the loaded nonmetal nitrogen one-dimensionally doping TiO2 is prepared by acidification, ion exchange and following heat treatment and by hydrothermal technology. The photocatalyst prepared by the invention is characterized in that the doping of nitrogen leads the catalysis to absorb the visible light and the absorption wavelength red shift is 600nm; the catalyst self is a in loaded style, which solves the defect that granulated catalyst is easy to fall off; the catalyst has a one-dimensional structure, large specific surface and abundant active points, which is favorable for strengthening reaction and mass transport process, thus realizing the degradation of typical indoor air contamination, compared with granulated nitrogen doping TiO2, the activity is higher to 1.2-3.0 times.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a photocatalytic degradation of organic matter and its preparation, specifically a loaded nitrogen-doped one-dimensional structure TiO 2 and its preparation method. 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 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. ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J27/24A61L9/22
Inventor 赵伟荣董帆吴忠标
Owner ZHEJIANG ZHONGDE IND
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