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Preparing method of electro-assisted photocatalysis cathode used for removing inorganic halite in water

A technology of electro-assisted photocatalysis and halide salts, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, water pollutants, etc., can solve the problems of poor uniformity, poor adsorption, and easy cracking of photoelectric catalytic films, and achieve reduction Porosity, improve compactness, reduce cracking effect

Inactive Publication Date: 2016-05-25
山西芮海环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention solves the current problems of poor adsorption of halide anions on the surface of the photocathode and poor uniformity and easy cracking of the photocatalytic film prepared by the sol-gel method, and provides an electro-assisted photocatalysis for removing (reducing) inorganic halides in water Cathode preparation method

Method used

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Examples

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Effect test

Embodiment 1

[0021] Embodiment 1: A method for preparing an electro-assisted photocatalytic cathode for removing inorganic halide salts in water, comprising the following steps:

[0022] 1) Mix commercially available 25-mesh coconut shell activated carbon with concentrated nitric acid with a mass fraction of 20%, soak for 6 hours, wash with deionized water until neutral, and dry in an electric drying oven at 120°C;

[0023] 2) Configure a deionized aqueous solution of polyaluminum chloride with a mass fraction of 5%, keep the pH at 5, and stir with a magnetic stirrer for more than 30 minutes;

[0024] 3) Put the activated carbon particles washed and dried in step 1) into the polyaluminum chloride deionized aqueous solution prepared in step 2) for modification, soak for 2 hours under the action of a magnetic stirrer, and put them in a muffle at 500°C after taking them out Bake in the furnace for 1 hour, and cool down to room temperature with the furnace to prepare modified activated carbon;...

Embodiment 2

[0030] Embodiment 2: A method for preparing an electro-assisted photocatalytic cathode for removing inorganic halide salts in water, comprising the following steps:

[0031] 1) Mix commercially available 12-mesh fruit shell activated carbon with concentrated nitric acid with a mass fraction of 20%, soak for 6 hours, wash with deionized water until neutral, and dry in an electric drying oven at 120°C;

[0032] 2) Configure a deionized aqueous solution of polyaluminum sulfate with a mass fraction of 15%, keep the pH at 4.5, and stir with a magnetic stirrer for more than 30 minutes;

[0033] 3) Put the activated carbon particles washed and dried in step 1) into the polyaluminum sulfate deionized aqueous solution prepared in step 2) for modification, soak for 2 hours under the action of a magnetic stirrer, and put them in a muffle furnace at 300°C after taking them out Baking in the middle for 1h, then cooling down to room temperature with the furnace to prepare modified activated...

Embodiment 3

[0039] Embodiment 3: A method for preparing an electro-assisted photocatalytic cathode for removing inorganic halide salts in water, comprising the following steps:

[0040] 1) Mix commercially available 25-mesh coconut shell activated carbon with concentrated nitric acid with a mass fraction of 20%, soak for 6 hours, wash with deionized water until neutral, and dry in an electric drying oven at 120°C;

[0041] 2) Configure a deionized aqueous solution of polyaluminum chloride with a mass fraction of 10%, keep the pH at 5.5, and stir with a magnetic stirrer for more than 30 minutes;

[0042] 3) Put the activated carbon particles cleaned and dried in step 1) into the polyaluminum chloride deionized aqueous solution prepared in step 2) for modification, soak for 2 hours under the action of a magnetic stirrer, and put them in a muffle at 400°C after taking them out Bake in the furnace for 1 hour, and cool down to room temperature with the furnace to prepare modified activated car...

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Abstract

The invention relates to the technical field of electro-assisted photocatalysis water treatment, in particular to a preparing method of an electro-assisted photocatalysis cathode used for removing inorganic halite in water. The problems that the cathode surface is poor in adsorptivity, and a photoelectrocatalysis film is poor in uniformity and prone to cracking are solved. According to the scheme, the preparing method includes the steps that 1, activated carbon is mixed with concentrated nitric acid, soaked, cleaned to be neutral and dried; 2, a polyaluminium chloride compound solution is prepared and stirred; 3, the activated carbon is modified, stirred, soaked, dried and cooled; 4, the activated carbon, phenolic resin and graphite powder are mixed, pulverized and briquetted; 5, the mixture is activated in nitrogen to be prepared into a matrix; 6, titanium tetraisopropoxide and isopropanol solvent are mixed and added into a mixed solution to form sol; 8, the matrix is soaked in the sol, pulled and calcined. The preparing method has the advantages that the activated carbon is modified by the polyhydroxy complex, ionic selectivity is improved, powerful adsorption function is achieved, and more negative ions are adsorbed to the surface of the cathode. Absolute ethyl alcohol serves as the solvent, the gathering structure is improved, the porosity is reduced, compactness is improved, and cracking is reduced.

Description

technical field [0001] The invention relates to the technical field of electric-assisted photocatalytic water treatment, in particular to a method for preparing an electric-assisted photocatalytic cathode for removing inorganic halogen salts in water. Background technique [0002] In recent years, with the improvement of the quality of life, the people have paid more attention to the safety and health of drinking water. It is against this background that my country's current drinking water sanitation standard "Drinking Water Sanitation Standard" (GB5749-2006) has 71 new indicators compared with the previous version of the standard. Among these indicators, in addition to the indicators of microorganisms and disinfectants, a number of inorganic disinfection by-products including bromate, chlorate, and chlorite have also been added. Due to their high toxicity, the health risks caused by these inorganic halide salts have attracted worldwide attention. For the removal of inorga...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/70B01J21/18C02F101/12
CPCB01J21/18C02F1/283C02F1/70C02F2101/12
Inventor 张峰崔钰崔建国李红艳崔佳丽姜俐峰
Owner 山西芮海环保科技有限公司
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