Aluminum product coated with nitrogen-doped graphene/nitrogen-doped TiO2 photo-catalytic material

A nitrogen-doped graphene, photocatalytic material technology, applied in the field of photocatalytic materials, can solve the problems of unsuitability for indoor photocatalysis, inevitable low efficiency, low crystallinity, etc., achieve high surface-loaded free charge density, facilitate adsorption and The effect of decomposition, strong absorption edge redshift

Inactive Publication Date: 2014-07-30
SHANGHAI RONGFU NEW MATERIAL
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  • Abstract
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Problems solved by technology

[0003] The patent "Electrophoresis preparation method of photocatalytic film on the surface of metal substrate" (patent number ZL03102878.0, announcement number CN1212182, announcement date 2005.07.27) discloses a method of loading TiO on the metal surface by electrophoresis 2 The method of photocatalytic materials, but the process of this method is relatively complicated, it needs a whole set of electrophoretic coating device, and it can play the role of photocatalytic decomposition of pollutants under the irradiation of ultraviolet light, which is suitable for outdoor photocatalysis but not for indoor photocatalysis
The patent "Nano titanium dioxide modified fluorocarbon coating and its preparation process and application" (patent number ZL200610031354.8, announcement number CN100554343, announcement date 2009.10.28) discloses an anatase TiO 2 and rutile TiO 2 The method of mixed crystal modified fluorocarbon coating, which is then applied to the surface of aluminum alloy plate to make it have photodegradability, however, due to the addition of TiO 2 The agglomeration of the powder in the coating leads to uneven distribution of the coating film; in addition, the aluminum alloy plate coated with the modified coating can only have photocatalysis under ultraviolet light irradiation, which is not suitable for indoor photocatalysis
Patent application "A Visible Light Responsive Self-cleaning Fluorocarbon Aluminum Veneer Coated with Nitrogen-doped Nano-TiO Film" (Application No. 201210020937.6, Publication No. CN102587610, Publication Date 2012.07.18) provides a surface-coated N-doped Nano-TiO 2 The visible light-responsive self-cleaning fluorocarbon aluminum veneer method of the thin film, the preparation method is a low-temperature sol-gel method, however, the N-doped TiO obtained without the subsequent high-temperature annealing method 2 Low crystallinity and many crystal defects lead to the easy recombination of photogenerated electron-hole pairs at lattice defects, resulting in low photocatalytic activity, which is bound to be inefficient in the actual photocatalytic self-cleaning process, and it is difficult to truly realize practical applications

Method used

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  • Aluminum product coated with nitrogen-doped graphene/nitrogen-doped TiO2 photo-catalytic material
  • Aluminum product coated with nitrogen-doped graphene/nitrogen-doped TiO2 photo-catalytic material
  • Aluminum product coated with nitrogen-doped graphene/nitrogen-doped TiO2 photo-catalytic material

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Embodiment 1

[0028] Graphene oxide (GO) was prepared by the method disclosed in ACS Nano. 2010, 4(8): 4806-4814; 60 mg of the graphene oxide was weighed, 20 mL of deionized water was added, and ultrasonically dispersed for 1 hour to obtain graphene oxide dispersion Then add 0.56g of HMT and 6.76m of titanium trichloride solution, stir on a magnetic stirrer for 0.5 hours to mix evenly, and then ultrasonic for 0.5 hours, and finally transfer the solution into a 50mL hydrothermal kettle for 16 hours of hydrothermal reaction at 180°C. The obtained precipitates were successively washed by centrifugation with deionized water and ethanol, and dried in vacuum at a temperature of 60 °C for 12 hours to obtain nitrogen-doped graphene / nitrogen-doped TiO 2 Composite photocatalytic material; the nitrogen-doped graphene / nitrogen-doped TiO 2 X-ray diffraction spectra of composite photocatalytic materials, such as figure 1 as shown, figure 1 show that the nitrogen-doped graphene / nitrogen-doped TiO 2 Nit...

Embodiment 2

[0037] Graphene oxide (GO) was prepared by the method disclosed in the document ACS Nano. 2010, 4(8): 4806-4814), and 80 mg of the graphene oxide was added to 25 mL of deionized water, and ultrasonically dispersed for 1.5 hours to obtain a graphene oxide dispersion ; Add 0.28g hexamethylenetetramine and 3.38mL titanium trichloride solution respectively in the graphene oxide dispersion, stir on a magnetic stirrer for 1 hour, mix well, then ultrasonically stir for 1 hour, then transfer the solution to In a hydrothermal kettle, at a temperature of 160°C, the hydrothermal reaction was carried out for 20 hours, and the obtained precipitates were successively washed with deionized water and ethanol by centrifugation, and then dried in vacuum at a temperature of 50°C for 10 hours to obtain nitrogen-doped Heterographene / nitrogen-doped TiO 2 Composite photocatalytic material; the aluminum profile to be coated is ultrasonically cleaned with acetone, water, and ethanol for 30 minutes, an...

Embodiment 3

[0039] Graphene oxide (GO) was prepared by the method disclosed in the document ACS Nano. 2010, 4(8): 4806-4814), and 8 mg of the graphene oxide was added to 15 mL of deionized water, and ultrasonically dispersed for 1.25 hours to obtain a graphene oxide dispersion ; Add 1.12g hexamethylenetetramine and 13.52mL titanium trichloride solution respectively in the graphene oxide dispersion, stir on a magnetic stirrer for 0.75 hours, mix well, then ultrasonically stir for 0.75 hours, then transfer the solution to In a hydrothermal kettle, at a temperature of 200°C, the hydrothermal reaction was carried out for 12 hours, and the obtained precipitates were successively washed with deionized water and ethanol by centrifugation, and then dried in vacuum at a temperature of 70°C for 8 hours to obtain nitrogen-doped Heterographene / nitrogen-doped TiO 2 Composite photocatalytic material; the aluminum profile to be coated is ultrasonically cleaned with acetone, water, and ethanol for 10 min...

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Abstract

The invention provides an aluminum product coated with a nitrogen-doped graphene/nitrogen-doped TiO2 photo-catalytic material. The aluminum product is prepared according to the following steps: preparing graphene oxide by using a method disclosed from the page 4806 to the page 4814 of volume 2010-4 of the journal of Nanometer of the American Chemical Society; adding deionized water, and performing ultrasonic dispersion to obtain graphene oxide dispersion liquid; respectively adding a hexamethylene tetramine solution and a titanium trichloride solution, uniformly mixing, performing hydrothermal reaction, centrifugally washing a precipitate, and drying to obtain the nitrogen-doped graphene/nitrogen-doped TiO2 composite photo-catalytic material; washing and drying an aluminum profile needing to be coated; adding the composite photo-catalytic material into acetonitrile or methyl methacrylate, and performing ultrasonic dispersion; and uniformly spraying the dispersion liquid onto the surface of the aluminum profile, and drying to obtain the aluminum product coated with the nitrogen-doped graphene/nitrogen-doped TiO2 composite photo-catalytic material. According to the aluminum product, photo-catalysis can be generated under the irradiation of indoor light, indoor air is purified, and indoor pollutants are reduced.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a nitrogen-doped graphene / nitrogen-doped TiO 2 Aluminum products coated with photocatalytic materials have a strong photocatalytic effect under visible light irradiation in indoor lighting. The photocatalytic materials coated on such aluminum products are new nitrogen-doped graphene / nitrogen-doped TiO 2 Composite photocatalytic materials. Background technique [0002] In recent years, with the improvement of people's living standards, the decoration industry has risen day by day, and the problem of indoor air pollution has become increasingly serious. Human beings work and live indoors 90% of the time, and about 60% of them are at home. 30% of the world's new and renovated buildings have indoor air pollution that is harmful to health, causing 2.8 million people in the world to die directly or indirectly from decoration pollution every year. The biggest victims o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01D53/86B01D53/56
Inventor 吴秋荣吴炳元王育华刘斌李昊董鹏玉
Owner SHANGHAI RONGFU NEW MATERIAL
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