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Preparation method of bismuth oxychloride/graphene composite visible light catalyst

A graphene composite and bismuth oxychloride technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as unsatisfactory effects of sulfa drugs, Achieve the effect of strong market application prospect and stable performance

Inactive Publication Date: 2014-08-27
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of conventional biological treatment to remove sulfonamides in water is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] 0.73g BiCl 3 Add it to 50 mL of hydrochloric acid solution with a molar concentration of 1 mol / L, stir and dissolve to obtain a clear solution. Then, under magnetic stirring (300r / min), 100mL of water was added dropwise (about 4mL / min) into the above solution, and stirring was continued for 60min after the dropwise addition was completed. Filter, wash with water and ethanol three times respectively, and then dry in a constant temperature drying oven at 80°C to obtain a silver-white pure bismuth oxychloride photocatalyst. The 15mg / L sulfonamide wastewater was degraded under natural sunlight, and the removal rate was 52.4% within 10 hours.

Embodiment 2

[0011] 0.73g BiCl 3 Add it to 50 mL of hydrochloric acid solution with a molar concentration of 1 mol / L, stir and dissolve to obtain a clear solution. Then, under magnetic stirring (300r / min), 100mL of water was added dropwise (about 4mL / min) into the above solution, and stirring was continued for 60min after the dropwise addition was completed. Filter, wash with water and ethanol three times respectively, and then dry in a constant temperature drying oven at 80°C to obtain a silver-white pure bismuth oxychloride photocatalyst. Prepare 100 mL of graphene oxide aqueous solution with a mass concentration of 10 mg / L, ultrasonically disperse for 1 h, add 0.2 g of the prepared bismuth oxychloride and stir for adsorption for 2 h. Then add 0.02mL of hydrazine hydrate, stir evenly, transfer to a constant temperature water bath, and perform a reduction reaction in a water bath at 80°C until the solution turns uniformly black. After the reaction, the solution was naturally cooled to r...

Embodiment 3

[0013] 0.73g BiCl 3 Add it to 50 mL of hydrochloric acid solution with a molar concentration of 1 mol / L, stir and dissolve to obtain a clear solution. Then, under magnetic stirring (300r / min), 100mL of water was added dropwise (about 4mL / min) into the above solution, and stirring was continued for 60min after the dropwise addition was completed. Filter, wash with water and ethanol three times respectively, and then dry in a constant temperature drying oven at 80°C to obtain a silver-white pure bismuth oxychloride photocatalyst. Prepare 100 mL of graphene oxide aqueous solution with a mass concentration of 20 mg / L, ultrasonically disperse for 1 h, add 0.2 g of the prepared bismuth oxychloride and stir for adsorption for 2 h. Then add 0.04mL of hydrazine hydrate, stir evenly, transfer to a constant temperature water bath, and perform a reduction reaction in a water bath at 80°C until the solution turns uniformly black. After the reaction, the solution was naturally cooled to r...

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PUM

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Abstract

The invention discloses a preparation method of a bismuth oxychloride / graphene composite visible light catalyst. The preparation method comprises the following steps of (1) preparing a silvery white pure bismuth oxychloride photocatalyst; (2) preparing 100 ml of graphene oxide solution with the mass concentration of 10 to 60 mg / l, performing ultrasonic dispersion for 1 h, adding 0.2 g of bismuth oxychloride photocatalyst prepared in the step (1), mixing and adsorbing for 2 hours, then adding hydrazine hydrate, uniformly mixing, and then reducing in a water bath at 80 DEG C until the solution uniformly becomes black; (3) naturally cooling the solution to room temperature after reaction, filtering, washing with water and ethanol respectively for three times, and then drying in a constant-temperature drying box at 60 DEG C for 8 hours, so as to prepare the bismuth oxychloride / graphene composite visible light catalyst. The bismuth oxychloride / graphene composite visible light catalyst prepared with the preparation method responds to sunlight, natural sunlight can be utilized to effectively degrade sulfanilamide waste water, and the bismuth oxychloride / graphene composite visible light catalyst has the advantages of stable performance and no toxicity and has a strong market application prospect.

Description

technical field [0001] The invention belongs to the technical field of visible light catalytic materials, and in particular relates to a preparation method of a bismuth oxychloride / graphene composite visible light catalyst capable of efficiently degrading sulfonamide wastewater. Background technique [0002] Sulfonamides and their derivatives are a class of antibacterial and anti-inflammatory drugs widely used in humans and animals, and sulfonamides are the most widely used antibacterial drugs in animal feed production. The proportion of sulfonamides in antibiotic veterinary medicines used in different countries varies from 2% (USA) to 22% (UK, Kenya). Sulfonamides are excreted from human and other animal organisms in the form of unmetabolites and biotransformation products. At the same time, expired sulfa drugs will also be discharged into sewage by humans. Because sulfa drugs are amphoteric, they have better solubility and higher mobility in environmental water. Therefo...

Claims

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Application Information

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IPC IPC(8): B01J23/18C02F1/30C02F101/38
CPCY02W10/37
Inventor 孙剑辉董淑英冯精兰皮运清孙靖宇崔延瑞苏现伐闫旭
Owner HENAN NORMAL UNIV
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