Preparation method of boron-doped graphene/TiO2 nanorod photocatalytic material

A photocatalytic material, graphene technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc., can solve the problems of high requirements for reaction equipment, complicated preparation process, pollution of the environment, etc., to achieve high conductivity and Effect of Surface Loading Free Charge Density

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

The common problems in the above-mentioned prior art are that catalysts and templates are needed in the preparation process, the pickling in the post-treatment process will pollute the environment, the preparation process is complex, and the cost is high
Moreover, the requirements for the reaction equipment are relatively high. It is necessary to use mechanical pumps, Roots pumps and molecular pumps to pump the reaction chamber into an oxygen-free environment, and it is necessary to heat the substrate to a high temperature, and the preparation process consumes a lot of energy.
Therefore, when boron-doped graphene and titanium dioxide photocatalytic materials are prepared by the commonly used high-temperature thermal doping method and chemical vapor deposition method, they can only be prepared in two steps. Th

Method used

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  • Preparation method of boron-doped graphene/TiO2 nanorod photocatalytic material
  • Preparation method of boron-doped graphene/TiO2 nanorod photocatalytic material

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Embodiment 1

[0029] Graphene oxide (GO) was prepared by the method disclosed in the American Chemical Society "Nano" journal, Volume 4, 2010, page 4806-4814; weigh 80 mg of graphene oxide, add 25 ml of deionized water, and ultrasonically disperse for 1 hour to obtain graphene oxide Dispersion liquid: adding 0.3g sodium borohydride and 8.45mL concentration of mass percent to the graphene oxide dispersion liquid is 20% titanium trichloride solution, sodium borohydride is used as boron source and reducing agent, and titanium trichloride is used as titanium source; Stir on a magnetic stirrer for 30 minutes, then ultrasonically stir for 40 minutes, and finally transfer the solution to a hydrothermal kettle, and conduct a hydrothermal reaction at a temperature of 180°C for 14 hours to obtain a precipitate; use deionized water and ethanol to wash the precipitate separately by centrifugation After that, it was vacuum-dried at 60 °C for 10 hours, and then ground into a uniform powder with an agate m...

Embodiment 2

[0037] Graphene oxide was prepared by the method disclosed in the document ACS Nano. 2010, 4(8): 4806-4814; 40 mg of graphene oxide was weighed, added to 20 mL of deionized water, and ultrasonically dispersed for 0.75 hours to obtain a graphene oxide dispersion, and then added 0.61g of sodium borohydride and 3.38mL of titanium trichloride solution with a concentration of 20% by mass, stirred on a magnetic stirrer for 40 minutes, then ultrasonically stirred for 30 minutes, and finally transferred the solution into a 50mL hydrothermal kettle, and heated at 160°C After reacting for 16 hours, the obtained precipitate was successively washed with deionized water and ethanol by centrifugation, dried in vacuum at 50°C for 12 hours, and then ground into a uniform powder with an agate mortar to obtain a boron-doped graphene / rutile phase TiO 2 Nanorod composite photocatalytic materials.

Embodiment 3

[0039] Graphene oxide was prepared by the method disclosed in the document ACS Nano. 2010, 4(8): 4806-4814; 8 mg of graphene oxide was weighed, added to 15 mL of deionized water, and ultrasonically dispersed for 0.5 hours to obtain a graphene oxide dispersion, and then added 0.9g of sodium borohydride and 13.52mL of titanium trichloride solution with a mass percentage concentration of 20%, stirred on a magnetic stirrer for 50min, then ultrasonically stirred for 50min, and finally transferred the solution into a 50mL hydrothermal kettle, and hydrothermally heated at 200°C After reacting for 12 hours, the obtained precipitate was successively washed with deionized water and ethanol by centrifugation, dried in vacuum at 70°C for 8 hours, and then ground into a uniform powder with an agate mortar to obtain a boron-doped graphene / rutile phase TiO 2 Nanorod composite photocatalytic materials.

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Abstract

The invention provides a preparation method of boron-doped graphene/TiO2 nanorod photocatalytic material. The method comprises the following steps of preparing graphene oxide by a method disclosed in pages from 4806 to 4814 in the volume 4 in 2010 of nanometer periodical of the American chemical society; weighing 8-80mg of graphene oxide, feeding 15-25ml of deionized water and carrying out ultrasonic dispersion to obtain graphene oxide dispersion liquid; feeding sodium borohydride and titanium trichloride solution into the graphene oxide dispersion liquid, stirring and then carrying out a hydrothermal reaction to obtain precipitate; and washing the precipitate, carrying out vacuum drying, and grinding the product into uniform powder to obtain the boron-doped graphene/TiO2 nanorod composite photocatalytic material. After the method is adopted, titanium dioxide can be well loaded on boron-doped graphene, the photocatalytic activity of the composite material is improved, harmful gases such as nitrogen oxide and nitrogen dioxide can be chemically adsorbed, and the harmful gases can be well adsorbed and decomposed on the surface of the graphene.

Description

technical field [0001] The invention belongs to the technical field of nanometer photocatalytic materials, and relates to a boron-doped graphene / rutile phase TiO 2 The preparation method of the nanorod composite photocatalytic material uses a simple one-step hydrothermal method to prepare the photocatalytic material with relatively high photocatalytic activity. Background technique [0002] Photocatalytic technology is a hot spot in scientific research today, and its application range is very wide, such as sewage treatment, air purification, solar energy utilization, antibacterial, anti-fog, and self-cleaning functions. Titanium dioxide is an ideal photocatalytic material due to its excellent photocatalytic performance, high activity, stability, non-toxicity and low price, so it may have great application prospects in energy regeneration and environmental protection. However, the large band gap of titanium dioxide (3.2eV for anatase phase and 3.0eV for rutile phase) makes i...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01D53/90B01D53/56B82Y30/00B82Y40/00
Inventor 吴秋荣吴炳元王育华刘斌李昊
Owner SHANGHAI RONGFU NEW MATERIAL
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