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Polyaniline/copper sulphide composite photocatalyst with dye adsorption-catalytic degradation function as well as preparation method and application of polyaniline/copper sulphide composite photocatalyst

A technology for catalytic degradation and polyaniline, applied in the direction of organic compound/hydride/coordination complex catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of high cost and complexity, and achieve low cost, Low production cost and improved degradation effect

Active Publication Date: 2021-06-08
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0012] In view of the complex and high-cost problems of the existing dye wastewater treatment, the present invention provides a polyaniline / copper sulfide composite photocatalyst with the function of adsorption-catalytic degradation of dye and its preparation method and application. Copper sulfide and polyaniline are combined to obtain a catalyst, which can not only physically adsorb anionic dyes, but also chemically degrade cationic dyes, and can well remove dyes in wastewater

Method used

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  • Polyaniline/copper sulphide composite photocatalyst with dye adsorption-catalytic degradation function as well as preparation method and application of polyaniline/copper sulphide composite photocatalyst
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  • Polyaniline/copper sulphide composite photocatalyst with dye adsorption-catalytic degradation function as well as preparation method and application of polyaniline/copper sulphide composite photocatalyst

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preparation example Construction

[0042] A kind of preparation method of polyaniline / copper sulfide composite photocatalyst with adsorption-catalytic degradation dye function of the present invention, its steps are:

[0043] Step 1. Pipette 1.6mL of aniline solution into 50mL of 0.5mol / L hydrochloric acid solution with a pipette gun, and sonicate until uniformly mixed, and the sonication time is greater than or equal to 30min.

[0044] Step 2. Add a certain amount of ammonium persulfate solution dropwise to the solution obtained in step 1 while stirring: put the solution obtained in step 1 on a magnetic stirrer, add 4.56g dropwise while stirring, and dissolve in 50mL deionized The ammonium persulfate solution in water is fully reacted and stirred for 12 hours at 15±5°C, pH is 2-10, and the stirring speed is 100-150 r / min. The color of the solution gradually changed from transparent to dark green, indicating the formation of polyaniline.

[0045] Step 3, using in-situ precipitation reaction, in the solution of...

Embodiment 1

[0056] (1) Preparation of polyaniline: pipette 1.6mL of aniline solution into 50mL of 0.5mol / L hydrochloric acid solution with a pipette gun, and ultrasonically mix for 30min; then place the above solution on a magnetic stirrer and stir while stirring Add 4.56g of ammonium persulfate solution (dissolved in 50mL of deionized water) dropwise, and fully react and stir for 12 hours at 15±5°C, pH 2-10, stirring speed 100-150r / min. The color of the solution gradually changed from transparent to dark green, indicating the formation of polyaniline.

[0057] (2) In-situ loading of nano-copper sulfide: on the basis of polyaniline, add 50mL of 0.72mol / L copper nitrate solution dropwise while stirring, at 15±5°C, pH is 2-10, stirring speed is 100- Under the condition of 150r / min, fully react and stir for 12h; then add 50mL of 0.72mol / L Na 2 S solution, under the conditions of 15±5°C, pH 2-10, stirring speed 100-150r / min, fully react and stir for 12h; then use the polyaniline / copper sulfi...

Embodiment 2

[0061] (1) Preparation of polyaniline: pipette 1.6mL of aniline solution into 50mL of 0.5mol / L hydrochloric acid solution with a pipette gun, and ultrasonically mix for 30min; then place the above solution on a magnetic stirrer and stir while stirring Add 4.56g of ammonium persulfate solution (dissolved in 50mL of deionized water) dropwise, and fully react and stir for 12 hours at 15±5°C, pH 2-10, stirring speed 100-150r / min. The color of the solution gradually changed from transparent to dark green, indicating the formation of polyaniline.

[0062] (2) In-situ loading of nano-copper sulfide: on the basis of polyaniline, add 50mL of 0.36mol / L copper nitrate solution dropwise while stirring, at 15±5°C, pH is 2-10, stirring speed is 100- Under the condition of 150r / min, fully react and stir for 12h; then add 50mL of 0.36mol / L Na 2 S solution, under the conditions of 15±5°C, pH 2-10, stirring speed 100-150r / min, fully react and stir for 12h; then use the polyaniline / copper sulfi...

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Abstract

The invention discloses a polyaniline / copper sulfide composite photocatalyst with dye adsorption-catalytic degradation functions and a preparation method and application thereof, and belongs to the technical field of catalytic degradation. The preparation method of the composite photocatalyst comprises the following steps: uniformly mixing aniline and a hydrochloric acid solution through ultrasonic waves, dropwise adding an ammonium persulfate solution while stirring to generate polyaniline, and then loading a nano photocatalyst copper sulfide on the generated polyaniline by using an in-situ precipitation method. According to the polyaniline / copper sulfide composite photocatalyst obtained by the method, the molar ratio of aniline to copper sulfide is (0.5-2):1, the molar ratio of aniline to ammonium persulfate is 0.9:1, and the molar ratio of aniline to hydrochloric acid is 0.72:1. The nano photocatalyst copper sulfide is loaded on polyaniline in an in-situ precipitation manner, the method is simple and convenient to operate, and the prepared polyaniline / copper sulfide composite photocatalyst has a remarkable effect when being applied to adsorption of anionic dye wastewater and light degradation removal of cationic dye wastewater.

Description

technical field [0001] The invention relates to the technical field of catalytic degradation, and more specifically relates to a polyaniline / copper sulfide composite photocatalyst with the function of adsorption-catalytic degradation of dyes and its preparation method and application. Background technique [0002] A dye is defined as a natural or synthetic chemical substance that is widely used in industries such as paper, leather, pharmaceuticals, cosmetics, plastics and textiles. It is estimated that the amount of dyes produced each year exceeds 10,000 tons, of which 1% of the total dye production will be discharged into water bodies, causing serious damage to the natural water body environment. These dye effluents are carcinogenic and threaten human and animal life. Therefore, the treatment of dye wastewater has attracted the attention of scholars in the environmental field. [0003] At present, the common methods for treating dye wastewater are: (1) physical method, us...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/28B01J35/00B01J37/03C02F1/30C02F101/30
CPCB01J37/031B01J31/06B01J31/28C02F1/30C02F2101/308C02F2305/10B01J35/39
Inventor 杨建华方璐甘信宏孟冠华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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