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Technique for improving capability of removing CO with supported nano-Au catalyst normal temperature oxidization

A technology of room temperature oxidation and catalytic oxidation, applied in molecular sieve catalysts, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problems of poor activity stability, etc., to improve performance, improve activity and Stability, the effect that is conducive to large-scale promotion

Inactive Publication Date: 2009-02-18
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity stability of this type of supported nano-Au catalyst is relatively poor, how to make it work for a long time is the key to the wide application of this type of catalyst

Method used

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  • Technique for improving capability of removing CO with supported nano-Au catalyst normal temperature oxidization
  • Technique for improving capability of removing CO with supported nano-Au catalyst normal temperature oxidization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Au / TiO 2 Catalyst preparation

[0019] Weigh 1 gram of TiO 2 Powder (P25, particle size is 50-70 mesh), add it to 100ml of HAuCl with gold content of 0.01g / ml 4 In the solution (the solution was adjusted to pH about 9 with 1mol / L NaOH solution in advance), heat to maintain the temperature at 70°C, continue to add 1mol / L NaOH solution dropwise, control the pH of the suspension to 9, stir for 2 hours, then age for 2 hours, and filter to obtain solid powder . With 1mol / LNaBH 4 solution to reduce the powder, and then centrifuged with deionized water to remove Cl - 、Na + , dried at 80°C to prepare the supported nano-Au catalyst (Au / TiO 2 ). The content of Au in the catalyst is about 2.0 wt%.

Embodiment 2

[0021] Au / SiO 2 Catalyst preparation

[0022] Weigh 1 gram of SiO 2 (particle size is 50-70 mesh), according to the same method in embodiment 1, makes Au / SiO 2 catalyst. The content of Au in the catalyst is about 2.0 wt%.

Embodiment 3

[0024] Au / Al 2 o 3 Catalyst preparation

[0025] Weigh 1 gram of γ-Al 2 o 3 (particle size is 50-70 order), according to the same method in embodiment 1, makes Au / Al 2 o 3 catalyst. The content of Au in the catalyst is about 2.0 wt%, respectively.

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Abstract

The invention provides a technology for improving the CO removing performance of a supported type nanometer Au catalyzer through oxidation at a room temperature. According to the technology, visible light acts on the surface of the supported type nanometer Au catalyst, and the performance of the catalyst for oxidizing CO is improved through the plasma resonance absorption of the surfaces of the nanometer Au particles. According to the invention, after the visible light is introduced onto the surface of the catalyst, the plasma resonance absorption is generated on the surfaces of the nanometer Au particles under the action of the visible light, and consequently the activity and stability of the Au catalyst for catalyzing and oxidizing CO are improved. Furthermore, the introduction of the light can also improve the temperature of the surface of the catalyst so as to improve the thermal catalytic activity of the catalyst. The technology has a simple and easy operation process. Natural light, sunlight and an artificial visible light source can be taken as the visible light source. The technology is suitable for a plurality of occasions for removing CO.

Description

technical field [0001] The invention belongs to the field of catalytic oxidation removal of carbon monoxide, and more specifically relates to a technology for improving the performance of a supported nanometer Au catalyst for oxidation removal of carbon monoxide at room temperature. Background technique [0002] As a common gas pollutant, CO is easily combined with hemoglobin in the human body, causing hypoxia in the body and causing poisoning. Moreover, low-temperature CO is oxidized in CO 2 Gas purification in lasers, CO gas detectors, gas purification devices for breathing, and the reduction and elimination of CO emissions from industrial production to the environment play an important role, so the catalytic oxidation of low-temperature CO has high practical value. At present, the catalysts for catalytic oxidation of CO are mainly supported catalysts with Au, Pd, Pt, etc. as the main active components. Among them, supported on oxide supports, such as TiO 2 , Al 2 o 3 ...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J29/44A61L9/18H01M4/90
CPCY02E60/50
Inventor 付贤智戴文新郑香平刘平陈旬王绪绪丁正新
Owner FUZHOU UNIVERSITY
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