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A kind of three-dimensional carbon nanotube nanocomposite catalyst and its preparation method and application

A nanocomposite and carbon nanotube technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as desorption, incomplete adsorption, secondary pollution, etc., and achieve high adsorption capacity , complete degradation and stable structure

Inactive Publication Date: 2011-12-28
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption of activated carbon and carbon nanotubes to dye molecules in water is mainly physical adsorption, and the adsorption is not complete and there is desorption during use, which is likely to cause secondary pollution.

Method used

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  • A kind of three-dimensional carbon nanotube nanocomposite catalyst and its preparation method and application
  • A kind of three-dimensional carbon nanotube nanocomposite catalyst and its preparation method and application
  • A kind of three-dimensional carbon nanotube nanocomposite catalyst and its preparation method and application

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preparation example Construction

[0023] The preparation method of the three-dimensional carbon nanotube nanocomposite catalyst is carried out as follows:

[0024] 1) Dissolving the cadmium sulfide nanoparticles in an organic solvent including chloroform, n-hexane, tetrahydrofuran, toluene or ethyl acetate to prepare a solution with a mass volume concentration of 0.01-2 mg / mL;

[0025] 2) soaking the carbon nanotube sponge in a solution of cadmium sulfide nanoparticles, the mass ratio of carbon nanotubes and cadmium sulfide nanoparticles is 1-200:1, and soaking for 0.5-24 hours at a temperature of 0-50°C; The cadmium sulfide nanoparticles are attached to the surface of the carbon nanotube sponge and inside the pores of the carbon nanotube sponge to form a three-dimensional carbon nanotube nanocomposite catalyst;

[0026] 3) Take out the three-dimensional carbon nanotube nanocomposite catalyst and dry it in vacuum.

[0027] The application of the three-dimensional carbon nanotube nanocomposite catalyst as a ph...

Embodiment 1

[0041] Preparation of three-dimensional carbon nanotube nanocomposite catalyst:

[0042] Take the density as 7.3mg / cm 33.8 mg of carbon nanotube sponge was immersed in 3 mL of toluene solution with a concentration of 1 mg / mL cadmium sulfide nanoparticles at room temperature, soaked for 24 hours and taken out. After vacuum drying, a three-dimensional block product was obtained. The mass ratio of carbon nanotube sponge to cadmium sulfide is 2:1. Observed by a scanning electron microscope (model Hitachi S4800 FESEM), the cadmium sulfide nanoparticles are located on the surface and inside the pores of the carbon nanotube sponge. The particle size of the cadmium sulfide nanoparticles was measured by a transmission electron microscope (type Tecnai T20) to be 4-6 nm.

[0043] The photo of the three-dimensional carbon nanotube nanocomposite catalyst prepared by the present embodiment is as follows figure 1 shown. The scanning electron micrograph of the three-dimensional carbon na...

Embodiment 2

[0045] Preparation of three-dimensional carbon nanotube nanocomposite catalyst:

[0046] Take the density as 5.8mg / cm 3 Immerse 3.8 mg of carbon nanotube sponge in 3 mL of chloroform solution with a concentration of 0.01 mg / mL cadmium sulfide nanoparticles at 0° C., soak for 0.5 h and take it out. After vacuum drying, a three-dimensional block product was obtained. The mass ratio of carbon nanotube sponge to cadmium sulfide is 200:1. Observed by a scanning electron microscope (model Hitachi S4800FESEM), the cadmium sulfide nanoparticles are located on the surface and inside the pores of the carbon nanotube sponge. The particle size of the cadmium sulfide nanoparticles was measured by a transmission electron microscope (type: Tecnai T20) to be 3-5 nm.

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Abstract

Provided are a three-dimensional carbon nanotube nano composite catalyst, and a preparation method and application thereof, which belong to the technical field of nano-material preparation. The nano composite catalyst contains carbon nanotube sponge and cadmium sulfide nano particles. The preparation method includes the step that the carbon nanotube sponge is dipped in an organic solution of the cadmium sulfide nano particles, so that the cadmium sulfide nano particles adhere on a surface and in apertures of the carbon nanotube sponge to form a three-dimensional carbon nanotube nano compositecatalyst. The invention also provides application of the catalyst to adsorption-photocatalysis degradation of dye molecules in water. On the one hand, the carbon nanotube sponge has large specific surface area, good adsorption property, and is easily operated and processed; on the other hand, the cadmium sulfide nano particles have high photocatalytic activity, and can catalyze degradation of dyemolecules in water under visible light. Therefore, the nano composite catalyst obtained in the invention has advantages of large adsorption quantity, high degradation efficiency, easy operation and processing, and capability of simultaneously degrading a plurality of pollutants in water, etc.

Description

technical field [0001] The invention relates to a nanocomposite catalyst, in particular to a nanocomposite catalyst containing carbon nanotube sponge and cadmium sulfide nanoparticle, a preparation method and application thereof, and belongs to the technical field of nanomaterial preparation. Background technique [0002] With the development of modern industry, the limited water resources on the earth have been damaged to varying degrees. Dyestuffs are widely used in textile, leather, paper, plastic and other industries. They have high solubility in water and become an important source of water pollution. [0003] The activated carbon materials currently on the market for water treatment mainly use physical adsorption to separate pollutants from water. Carbon nanotubes are hollow and layered structures formed by curling graphite sheets. They have high specific surface area, good thermodynamic and chemical stability, and are a promising adsorbent. Compared with traditional...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/10C02F1/30C02F101/30
Inventor 曹安源李红变桂许春韦进全王昆林朱宏伟吴德海
Owner PEKING UNIV
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