A noble metal-carbon nanotube three-dimensional porous composite and its preparation method and application

A carbon nanotube, three-dimensional porous technology, applied in the direction of alkali metal compounds, alkali metal oxides/hydroxides, separation methods, etc., can solve the problems of non-combustible coal soot separation, affecting material adsorption performance, uneven loading, etc. Achieve the effects of easy separation of coal-fired soot, increase of adsorption capacity, and high adsorption performance

Active Publication Date: 2018-09-04
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the loading of Ag on the carbon nanotubes in this material is very uneven, which affects the adsorption performance of the material; in addition, the material is a powder structure, and after the adsorption of mercury is completed, the adsorption material is not easy to separate from the coal soot due to its microscopic size. , easy to cause secondary pollution

Method used

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  • A noble metal-carbon nanotube three-dimensional porous composite and its preparation method and application
  • A noble metal-carbon nanotube three-dimensional porous composite and its preparation method and application
  • A noble metal-carbon nanotube three-dimensional porous composite and its preparation method and application

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Embodiment 1

[0063] TiO 2 The method for preparing silver-carbon nanotube three-dimensional porous composite as connecting layer comprises the following steps:

[0064] 1) carbon nanotube sponge is placed in the ethanol solution of tetrabutyl titanate, the volume ratio of tetrabutyl titanate and ethanol is 1:7, the mass ratio of carbon nanotube sponge and tetrabutyl titanate is 1: 100, shake on a shaker for 1 hour, so that tetrabutyl titanate is evenly adsorbed on the surface of the carbon nanotube sponge;

[0065] 2) Transfer the carbon nanotube sponge adsorbed with tetrabutyl titanate to water for ultrasonication, the volume ratio of carbon nanotube sponge to water is 1:100, and the ultrasonic time is 40min, so that tetrabutyl titanate is hydrolyzed into TiO 2 Wrapped on the surface of carbon nanotube sponge to form TiO 2 - Carbon nanotube sponge core-shell structure;

[0066] 3) adding ethanol dropwise to the three-dimensional composite, and then compressing and cleaning, repeating t...

Embodiment 2

[0073] TiO 2 The method for preparing a gold-carbon nanotube three-dimensional porous composite as a connecting layer comprises the following steps:

[0074]1) carbon nanotube sponge is placed in the ethanol solution of tetrabutyl titanate, the volume ratio of tetrabutyl titanate and ethanol is 1:7, the mass ratio of carbon nanotube sponge and tetrabutyl titanate is 1: 100, shake on a shaker for 10 minutes, so that tetrabutyl titanate is evenly adsorbed on the surface of carbon nanotube sponge;

[0075] 2) Transfer the carbon nanotube sponge adsorbed with tetrabutyl titanate to water for ultrasonication, the volume ratio of carbon nanotube sponge to water is 1:1000, and the ultrasonic time is 40min, so that tetrabutyl titanate is hydrolyzed into TiO 2 Wrapped on the surface of carbon nanotube sponge to form TiO 2 - Carbon nanotube sponge core-shell structure;

[0076] 3) adding ethanol dropwise to the three-dimensional composite, and then compressing and cleaning, repeating...

Embodiment 3

[0083] The method for preparing silver-carbon nanotube three-dimensional porous composite with carbon as connecting layer comprises the following steps:

[0084] 1) Put the carbon nanotube sponge in 1M glucose aqueous solution, place the carbon nanotube sponge and the glucose aqueous solution in a reaction kettle at 190°C for 4 hours, so that the surface of the carbon nanotube sponge is evenly coated with a layer of carbon as a connecting layer;

[0085] 2) Immerse the carbon nanotube sponge with a carbon connection layer on the surface into 1M AgNO 3 Ag adsorption in solution for 24h + , and dry;

[0086] 3) Adsorbed Ag + The carbon nanotube sponge was heated at 550 °C under the protection of inert gas to make AgNO 3 Decompose to obtain Ag-carbon nanotube three-dimensional porous composite.

[0087] Observed by a scanning electron microscope (model Hitachi S4800 FESEM), the length of the carbon nanotube sponge is tens to hundreds of microns, and the silver nanoparticles a...

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Abstract

The invention provides a precious metal-carbon nanometer tube three-dimensional porous compound and a preparing method and application thereof. The compound comprises precious metal nanometer particles, a carbon nanometer tube sponge and a connecting layer used for connecting the precious metal nanometer particles with the carbon nanometer tube sponge. The connecting layer wraps the carbon nanometer tube sponge. The precious metal nanometer particles are loaded on the connecting layer. The porosity and the specific area of the precious metal-carbon nanometer tube three-dimensional porous compound are ultrahigh, and the elemental mercury adsorption efficiency is high; in addition, for an alloy formed by precious metal and elemental mercury, adsorption mercury can be removed by means of heating and deallolying, so that an adsorption agent is recovered. The compound is of a three-dimensional porous structure, has magnetism and is convenient to use and recycle.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and application, and relates to a noble metal-carbon nanotube three-dimensional porous composite and a preparation method and application thereof. Background technique [0002] In recent years, air pollution has become increasingly serious and has gradually become a major problem in environmental pollution. Mercury pollution is an important aspect of air pollution, and mercury-containing flue gas released during coal combustion is the main source of atmospheric mercury pollutants. As of 2010, the global annual emission of mercury into the atmosphere through coal-fired flue gas is about 2,000 tons, of which my country's annual mercury emission is 500-600 tons, ranking first in the world. Mercury in the atmosphere can enter soil and water bodies through deposition and water washing, and further accumulate in the human body through the food chain, causing serious harm to the human b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/20B01J20/28B01D53/86B01D53/64
CPCB01D53/64B01D53/8665B01D2253/102B01D2255/10B01D2255/9205B01D2257/602B01J20/205B01J20/28007B01J20/28054
Inventor 方英李红变
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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