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Co3O4/CuO high-efficiency photo-thermal catalyst, and preparation method and applications thereof

A catalyst and photothermal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problems of high cost, unfavorable sustainable development, high energy consumption, etc. , to achieve the effects of low cost, high light-to-heat conversion performance, and uniform product morphology

Active Publication Date: 2019-08-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since thermal catalysis continuously provides the energy needed to degrade VOCs through external heating, although VOCs can be degraded efficiently, the process consumes a lot of energy and costs, which is not conducive to sustainable development.

Method used

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  • Co3O4/CuO high-efficiency photo-thermal catalyst, and preparation method and applications thereof
  • Co3O4/CuO high-efficiency photo-thermal catalyst, and preparation method and applications thereof
  • Co3O4/CuO high-efficiency photo-thermal catalyst, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Only difference with comparative example is in step (1), add copper nitrate trihydrate and cobalt nitrate hexahydrate, urea mix and dissolve in water, and copper nitrate trihydrate add-on is 0.1057g, other process is identical with comparative example, not here Let me tell you more. Wherein the mol ratio of cobalt nitrate and copper nitrate is 8:1, and the catalyst that this embodiment prepares is marked as Co 3 o 4 / CuO-I.

Embodiment 2

[0035] Only difference with embodiment 1 is that copper nitrate trihydrate add-on is 0.2114g, and other processes are identical with embodiment 1, repeat no more here. Wherein the mol ratio of cobalt nitrate and copper nitrate is 4:1, and the catalyst that this embodiment prepares is marked as Co 3 o 4 / CuO-II.

Embodiment 3

[0037] Only difference with embodiment 1 is that copper nitrate trihydrate add-on is 0.4227g, and other processes are identical with embodiment 1, repeat no more here. Wherein the mol ratio of cobalt nitrate and copper nitrate is 2:1, and the catalyst that this embodiment prepares is marked as Co 3 o 4 / CuO-III.

[0038] The catalyst XRD spectrum that comparative example and embodiment 1~3 prepare are as figure 1 As shown, as can be seen from the figure, along with the increase of copper nitrate consumption, the peak of copper oxide in the XRD pattern is more obvious, shows that the product that embodiment 1-3 finally prepares is Co 3 o 4 / CuO. The SEM images of the catalysts prepared in Comparative Examples and Examples 1 to 3 are as follows: Figure 2-5 As shown, it can be seen that pure Co 3 o 4 It is a sheet structure, with the addition of copper nitrate, Co 3 o 4 / CuO still maintains a flaky structure, and pure Co 3 o 4 The morphology differs in the Co 3 o 4 ...

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Abstract

The invention discloses a Co3O4 / CuO high-efficiency photo-thermal catalyst, and a preparation method and applications thereof. The preparation method comprises following steps: cobalt nitrate, cupricnitrate, and urea are taken as reaction raw materials, dissolving is carried out, coprecipitation hydro-thermal reaction is carried out, and washing and vacuum drying are carried out so as to obtain aprecursor; and 2, the precursor is subjected to roasting so as to obtain the Co3O4 / CuO high-efficiency photo-thermal catalyst. The technology is simple; cost is relatively low; the obtained product is uniform in morphology; the repeatability is high; high photo-thermal conversion performance is achieved; the Co3O4 / CuO interface effect is capable of reducing molecular oxygen activation energy obviously; compared with pure Co3O4, the advantages of Co3O4 / CuO are that more active substances are generated, so that toluene oxidation process sis more easy; toluene initial concentration is 360ppm, weight hourly space velocity is 90000 ml g<-1>h<-1>, when the temperature is increased to 125 DEG C through illumination heating, toluene degradation rate is as high as 91% or higher, inactivation resistance is improved greatly; and effective stable degradation of toluene at a low temperature is realized.

Description

technical field [0001] The invention belongs to the field of nanotechnology and the field of photothermal catalysis, and specifically relates to a Co 3 o 4 / CuO high-efficiency photothermal catalyst and its preparation method and application. Background technique [0002] With the continuous development of industry, the emission of volatile organic compounds (Volatile organic compounds, VOCs) in industrial applications has increased year by year, causing serious harm to nature and the living environment of human society. At present, thermal catalytic oxidation is considered to be one of the effective ways to deal with VOCs. Since thermal catalysis continuously provides the energy needed to degrade VOCs through external heating, although VOCs can be degraded efficiently, the process consumes a lot of energy and costs, which is not conducive to sustainable development. Therefore, the development of catalysts that can fully degrade VOCs in a low temperature environment is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03B01J37/08B01J37/10B01D53/86B01D53/44
CPCB01J23/75B01J23/002B01J37/03B01J37/082B01J37/10B01D53/8687B01J35/39
Inventor 丘勇才赵帅奇靳小静邬鹏叶代启
Owner SOUTH CHINA UNIV OF TECH
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