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Preparation method of activated carbon fiber membrane supported ZnO photocatalyst

A technology of activated carbon fiber and photocatalyst, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of high price and low ZnO loading, and improve adsorption performance and photocatalysis The effect of activity and large specific surface area

Active Publication Date: 2019-04-12
武夷学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material used in this process is activated carbon fiber, which is expensive, and the loading of ZnO in the loading process is low

Method used

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  • Preparation method of activated carbon fiber membrane supported ZnO photocatalyst
  • Preparation method of activated carbon fiber membrane supported ZnO photocatalyst
  • Preparation method of activated carbon fiber membrane supported ZnO photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present embodiment relates to the preparation of a kind of activated carbon fiber membrane supported ZnO photocatalyst, such as figure 1 shown, including the following steps:

[0033] 1. Add 0.5g of zinc acetate and 5g of cellulose acetate into 94g of dimethylformamide solution, and stir magnetically at 60°C for 5 hours to completely dissolve to form a uniform and transparent solution to obtain a precursor quenching solution.

[0034]2. Pour the above solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -20°C refrigerator for quenching for 60 minutes. After quenching, quickly take out the Petri dish, add 300mL ethanol to the Petri dish for extraction, remove dimethylformamide, change ethanol once every 6h, and change ethanol 5 times continuously. The sample was freeze-dried for 24 hours, and the obtained CA / ZnAc composite fiber membrane was placed in a desiccator for later use.

[0035] 3. Put the CA / ZnAc composite fiber membrane into 100...

Embodiment 2

[0041] The present embodiment relates to the preparation of a kind of active carbon fiber membrane loaded ZnO photocatalyst, comprises the following steps:

[0042] 1. Add 1.5g of zinc acetate and 7g of cellulose acetate to 93g of dimethylacetamide solution, and stir magnetically at 60°C for 5 hours to completely dissolve to form a uniform and transparent solution, and obtain a precursor quenching solution.

[0043] 2. Pour the above solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -30°C refrigerator for quenching for 60 minutes. After quenching, quickly take out the Petri dish, add 300mL ethanol to the Petri dish for extraction, remove dimethylacetamide, change ethanol once every 6h, and change ethanol 5 times continuously. The sample was freeze-dried for 24h, and the obtained CA / Zn(NO 3 ) 2 Composite fiber membrane, put it in a desiccator for later use.

[0044] 3. Combine CA / Zn(NO 3 ) 2 The composite fiber membrane was hydrolyzed in 100 mL...

Embodiment 3

[0050] The present embodiment relates to the preparation of a kind of active carbon fiber membrane loaded ZnO photocatalyst, comprises the following steps:

[0051] 1. Add 1 g of zinc acetate and 9 g of cellulose acetate to 90 g of dimethylformamide solution, and stir magnetically at 60°C for 5 hours to completely dissolve them to form a uniform and transparent solution to obtain a precursor quenching solution.

[0052] 2. Pour the above solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -20°C refrigerator for quenching for 60 minutes. After quenching, quickly take out the Petri dish, add 300mL ethanol to the Petri dish for extraction, remove dimethylformamide, change ethanol once every 6h, and change ethanol 5 times continuously. The sample was freeze-dried for 24 hours, and the obtained CA / ZnAc composite fiber membrane was placed in a desiccator for later use.

[0053] 3. Put the CA / ZnAc composite fiber membrane into 100mL mass concentration of 0...

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Abstract

The invention discloses a preparation method for activated carbon fiber membrane-supported ZnO photocatalyst, which includes the following steps: dissolving the precursor and template agent in a solvent to obtain a quenching liquid; Perform thermally induced phase separation to obtain the template agent / ZnAc composite fiber membrane; hydrolyze the template agent / ZnAc composite fiber membrane in an ethanol solution of sodium hydroxide to obtain the template agent / Zn(OH) 2 Composite fiber membrane; combine the template agent / Zn(OH) 2 After the composite fiber membrane is activated in an aqueous ammonium chloride solution, it is carbonized at 400 to 500°C to obtain the activated carbon fiber membrane supporting ZnO photocatalyst. The present invention uses cheap cellulose acetate as raw material and adopts an in-situ loading method to realize in-situ loading of ZnO on activated carbon fibers. Reduce the preparation cost of the catalyst and increase the loading of ZnO. At the same time, the activated carbon fiber prepared by the in-situ method is nanoscale and has a large specific surface area, which greatly improves the adsorption performance of organic pollutants and further improves the photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of activated carbon fiber membrane loaded ZnO photocatalyst, which belongs to the technical field of porous nanometer materials. Background technique [0002] With the rapid development of industry and economy, the problem of wastewater and waste gas, especially organic pollutants containing benzene rings, polycyclics, and chlorine, is becoming more and more serious. Under normal temperature and normal pressure, semiconductor catalysts can mineralize and degrade organic pollutants in water into carbon dioxide and water, which is a green technology method for treating pollutants in water. Semiconductor oxides such as TiO 2 Due to the advantages of photosensitive properties, non-toxicity, and high activity, it is widely used in organic wastewater treatment. Since ZnO has many TiO 2 Similar properties have also been widely used in photocatalytic wastewater treatment. with TiO 2 Compared with ZnO, the band...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J37/02C02F1/30C02F101/30
CPCC02F1/30B01J23/06B01J37/0201C02F2101/308B01J35/39
Inventor 林皓赵瑨云赵升云林维晟张健
Owner 武夷学院