Hollow carbon tube array embedded with nano metal, preparation method and application thereof

A nano-metal and catalyst technology, which is applied in the field of hollow carbon tube array catalyst and its preparation, can solve the problems of low degradation performance of pollutants, low production rate and utilization rate of active free radicals, etc., to improve degradation efficiency and chemical reaction rate , the effect of improving the catalytic performance

Active Publication Date: 2019-11-15
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing carbon catalytic materials, such as the low production rate and utilization rate of active free radicals, and low pollutant degradation performance, and provide a hollow carbon catalyst with embedded nano-metals and arranged in an orderly manner. Carbon tube array catalyst, the hollow carbon tube array material is embedded with catalytically active metal clusters to prepare a hollow carbon tube array nano-microreactor with embedded metals

Method used

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  • Hollow carbon tube array embedded with nano metal, preparation method and application thereof

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Effect test

Embodiment 1

[0043] A hollow carbon tube array catalyst embedded with gold nano metal, the catalyst carrier is a silanized hollow carbon tube array, the embedded metal is a gold nano cluster, and the mass ratio of the loaded metal to the carrier is 0.25:100.

[0044] Prepared by the following method:

[0045] S1. Add 150 mg of silanized nano hollow carbon tube array material to 75 mL of deionized water, sonicate for 1.5 h, and then add 32 μL of 20 mg / mL HAuCl 4 Solution, stirred at room temperature for 12h;

[0046] S2. Under ice-water bath (0°C), add 250 mL of NaBH to the reaction product of S1 4 (0.05mol / L), stirred for 3h, the obtained sample was washed with water, and vacuum-dried at 60°C;

[0047] S3. The product obtained from the reaction product of S2 was placed in a ceramic boat, and calcined at 450° C. for 2 hours in a tube furnace under a nitrogen atmosphere to obtain a hollow carbon tube array catalyst embedded with nano-metals.

[0048] By ICP-MS analysis, the mass fraction ...

Embodiment 2

[0060] A hollow carbon tube array catalyst embedded with gold nano metal, the catalyst carrier is a silanized hollow carbon tube array, the embedded metal is a gold nano cluster, and the mass ratio of the loaded metal to the carrier is 0.5:100.

[0061] Prepared by the following method:

[0062] S1. Add 150 mg of silanized nano-hollow carbon tube array material to 75 mL of deionized water, sonicate for 1.5 h, and then add 65 μL of 20 mg / mL HAuCl 4 Solution, stirred at room temperature for 12h;

[0063] S2. Under ice-water bath, add 250 mL of NaBH to the reaction product of S1 4 (0.05mol / L), stirred for 3h, the obtained sample was washed with water, and vacuum-dried at 60°C;

[0064] S3. The product obtained from the reaction product of S2 was placed in a ceramic boat, and calcined at 450° C. for 2 hours in a tube furnace under a nitrogen atmosphere to obtain a hollow carbon tube array catalyst embedded with nano-metals.

[0065] By ICP-MS analysis, the mass fraction of load...

Embodiment 3

[0069] A hollow carbon tube array catalyst embedded with gold nano metal, the catalyst carrier is a silanized hollow carbon tube array, the embedded metal is a gold nano cluster, and the mass ratio of the loaded metal to the carrier is 1.0:100.

[0070] Prepared by the following method:

[0071] S1. Add 150 mg of silanized nano hollow carbon tube array material to 75 mL of deionized water, sonicate for 1.5 h, and then add 130 μL of 20 mg / mL HAuCl 4 Solution, stirred at room temperature for 12h;

[0072] S2. Under ice-water bath, add 250 mL of NaBH to the reaction product of S1 4 (0.05mol / L), stirred for 3h, the obtained sample was washed with water, and vacuum-dried at 60°C;

[0073] S3. The product obtained from the reaction product of S2 was placed in a ceramic boat, and calcined at 450° C. for 2 hours in a tube furnace under a nitrogen atmosphere to obtain a hollow carbon tube array catalyst embedded with nano-metals.

[0074] By ICP-MS analysis, the mass fraction of loa...

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Abstract

The invention discloses a preparation method of a hollow carbon tube array embedded with nano metal and an application thereof. The carrier of the catalyst of the present invention is a silanized hollow carbon tube array, and the supported metal is gold, platinum, silver or copper nanocluster. The catalyst of the invention has a unique micro reactor structure of a nano hollow carbon tube array. Byconstructing a long-range ordered hollow tube array structure carbon material, the chemical reaction rate can be remarkably increased, so as to improve the catalytic performance of the catalyst, thenano-cluster metals can catalyze ozone efficiently and quickly, improve the degradation efficiency of gaseous pollutants, the removal rate of methanethiol is 99.72%, silanizing treatment makes the surface of the hollow carbon tube array carry amino groups, and the metal nano-clusters are loaded on the surface of the hollow carbon tube array material through calcination reduction, so that the metalis uniformly distributed on the surface of the carbon material, and the utilization rate of the metal is improved, which can be widely used in the field of gas pollutant purification treatment.

Description

technical field [0001] The invention relates to the technical field of environmental purification catalysts, and more specifically, to a hollow carbon tube array catalyst embedded with nanometer metals, a preparation method and application thereof. Background technique [0002] With the rapid development of the national economy, people's awareness of environmental protection has been continuously enhanced, and malodorous gas has received more and more attention as a kind of air pollution. Common odorous compounds include reduced sulfides, nitrogenous compounds, organic acids, aldehydes, and ketones, among which sulfurous compounds are considered to be the main odorous substances discharged from sewage treatment plants and composting plants. Methyl mercaptan (CH 3 SH) is a volatile gas with an odor of rotting cabbage, highly toxic and corrosive, and widely produced in municipal waste, sewage treatment, industrial waste, and other energy-related activities. Traditional metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/50B01J23/52B01J23/72B01J21/18B01D53/86B01D53/48B01D53/72
CPCB01D53/8606B01D53/864B01J21/185B01J23/42B01J23/50B01J23/52B01J23/72
Inventor 夏德华黄雅婧杨雯婧何春张青彭菲刘华丹廖宇宏张峰
Owner SUN YAT SEN UNIV
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