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Carbon-based heterogeneous catalyst, preparation method and pollutant degradation method

A heterogeneous catalyst and pollutant technology, applied in water pollutants, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high dispersion and high activity carbon-based catalyst preparation difficulties, and achieve recycling performance Good, suitable for a wide pH range

Pending Publication Date: 2021-03-23
ZHENGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a carbon-based heterogeneous catalyst and its preparation method and pollutant degradation method, which solves the problem of difficult preparation of highly dispersed and highly active carbon-based catalysts in the prior art

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  • Carbon-based heterogeneous catalyst, preparation method and pollutant degradation method

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preparation example Construction

[0056] The present invention also provides a method for preparing a carbon-based heterogeneous catalyst, comprising the steps of:

[0057] Step 1: growing and germinating bean seeds in a metal ion solution to obtain bean sprouts;

[0058] Step 2: After the bean sprouts are washed with deionized water, freeze-drying is carried out;

[0059] Step 3: Carrying out the carbonization reaction of the freeze-dried bean sprouts in a reducing atmosphere or an inert atmosphere to obtain a reaction product. Exemplarily, the reducing atmosphere is hydrogen and / or carbon monoxide, and the inert atmosphere is nitrogen and / or argon;

[0060] Step 4: Grinding, washing and vacuum drying the reaction product in sequence to obtain a carbon-based heterogeneous catalyst.

[0061] Compared with the prior art, the beneficial effect of the preparation method of the carbon-based heterogeneous catalyst provided by the present invention is basically the same as that of the carbon-based heterogeneous cat...

Embodiment 1

[0089] The preparation method of the carbon-based heterogeneous catalyst of the present embodiment is as follows:

[0090] Step 1: Soybean in Fe 2+ Grow and germinate in ionic solution to obtain bean sprouts, Fe 2+ Fe in ionic solution 2+ The concentration is 50mg / L;

[0091] Step 2: After washing the bean sprouts with deionized water, freeze-dry them at 15°C for 20 hours;

[0092] Step 3: heating the freeze-dried bean sprouts to 510° C. under a hydrogen atmosphere at a heating rate of 5° C. / min for carbonization reaction to obtain a reaction product;

[0093] Step 4: Grind the reaction product to a particle size of 0.1-0.15mm, wash it with methanol, and dry it in vacuum at 60°C for 12 hours to obtain a carbon-based heterogeneous catalyst with a specific surface area of ​​1500cm 3 / g, the particle size of metal particles is 20-100nm, and the loading amount of metal is 5wt.%.

[0094] The carbon-based heterogeneous catalyst that present embodiment obtains, Raman spectrum (...

Embodiment 2

[0096] The preparation method of the carbon-based heterogeneous catalyst of the present embodiment is as follows:

[0097] Step 1: Put mung beans in Cu 2+ Grow and germinate in ionic solution to obtain bean sprouts, Cu 2+ Cu in ionic solution 2+ The concentration is 200mg / L;

[0098] Step 2: after washing the bean sprouts with deionized water, freeze-dry them at 58° C. for 8 hours;

[0099] Step 3: heating the freeze-dried bean sprouts to 800° C. under a hydrogen atmosphere at a heating rate of 10° C. / min to carry out a carbonization reaction to obtain a reaction product;

[0100] Step 4: Grind the reaction product to a particle size of 0.15-0.18mm, wash it with methanol, and dry it in vacuum at 80°C for 5 hours to obtain a carbon-based heterogeneous catalyst with a specific surface area of ​​1200cm 3 / g, the particle size of the metal particles is 100-200nm, and the loading amount of the metal is 10wt.%.

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Abstract

The invention discloses a carbon-based heterogeneous catalyst, a preparation method and a pollutant degradation method, belongs to the technical field of heterogeneous catalysts, and solves the problem that a high-dispersion and high-activity carbon-based catalyst is difficult to prepare in the prior art. The carbon-based heterogeneous catalyst is prepared by growing legume seeds in a metal ion solution to obtain biomass and performing carbonization reaction on the biomass. The degradation method disclosed by the invention comprises the following steps: mixing the carbon-based heterogeneous catalyst, an organic pollutant aqueous solution and an oxidant, and conducting stirring for reaction, so as to degrade organic pollutants in the organic pollutant aqueous solution. The carbon-based heterogeneous catalyst, the preparation method and the pollutant degradation method can be used for degrading organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous catalysts, and in particular relates to a carbon-based heterogeneous catalyst, a preparation method, and a pollutant degradation method. Background technique [0002] Industrial wastewater and urban wastewater contain a large amount of organic pollutants, which cause great harm to the ecological environment and human health due to their characteristics of refractory degradation and high toxicity. Advanced oxidation technology can effectively degrade organic pollutants in wastewater. Advanced oxidation mainly produces strong oxidative hydroxyl radicals through the reaction of ferrous ions and hydrogen peroxide, which are used to oxidize and degrade organic pollutant molecules. Homogeneous advanced oxidation has problems such as narrow operating pH range, difficult catalyst recovery, and large amount of iron sludge. Heterogeneous advanced oxidation is currently a research hotspot in advanced o...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J23/745B01J23/72B01J23/75B01J23/34C02F1/72C02F101/30
CPCB01J27/22B01J23/745B01J23/72B01J23/75B01J23/34C02F1/722C02F2101/30Y02W10/37
Inventor 王重庆曹亦俊
Owner ZHENGZHOU UNIV
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