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Preparation method for bismuth oxychloride photocatalyst and application of bismuth oxychloride photocatalyst to degradation of sulfamethazine

A technology of sulfamethazine and bismuth oxychloride, which is applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of complex process operation and low photocatalytic efficiency, and achieves simple and efficient process. Visible light photodegradation, good controllability

Inactive Publication Date: 2017-11-24
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the previously prepared Bi 12 o 17 Cl 2 The overall photocatalytic efficiency is not high, and the process operation is complicated

Method used

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  • Preparation method for bismuth oxychloride photocatalyst and application of bismuth oxychloride photocatalyst to degradation of sulfamethazine
  • Preparation method for bismuth oxychloride photocatalyst and application of bismuth oxychloride photocatalyst to degradation of sulfamethazine
  • Preparation method for bismuth oxychloride photocatalyst and application of bismuth oxychloride photocatalyst to degradation of sulfamethazine

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Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of the bismuth oxychloride photocatalyst of the present invention comprises the following steps: dissolving 1 mmol of bismuth chloride and 3 mmol of sodium hydroxide in 80 mL of ultrapure water and mixing them, and stirring for 30 min to obtain a mixed solution. The mixed solution was transferred to a reaction kettle, and hydrothermally reacted at 140° C. for 12 hours. After cooling, wash with water and ethanol three times respectively, centrifuge, discard the supernatant, and dry the lower layer of solids to obtain bismuth oxychloride (also known as bismuth oxychloride) Bi 12 o 17 Cl 2 catalyst of light. The catalyst can efficiently degrade sulfamethazine. like figure 1 Shown is the SEM image of the photocatalyst prepared in Example 1. It can be seen from the figure that the catalyst has a nanosheet structure with a smooth surface, and the thickness of the nanolayer is 10-20nm.

Embodiment 2

[0024] A preparation method of the bismuth oxychloride photocatalyst of the present invention comprises the following steps: dissolving 1 mmol of bismuth chloride and 3 mmol of sodium hydroxide in 80 mL of ultrapure water and mixing them, and stirring for 30 min to obtain a mixed solution. The mixed solution was transferred to a reaction kettle, and hydrothermally reacted at 160° C. for 12 hours. After cooling, wash with water and ethanol three times respectively, centrifuge, discard the supernatant, and dry the lower solid to obtain Bi 12 o 17 Cl 2 catalyst of light. The catalyst can efficiently degrade sulfamethazine.

[0025] Performance Testing:

[0026] figure 2 For the XRD figure of the nanosheet of the photocatalyst prepared in embodiment 1 and 2, the peak of two kinds of catalysts is all with Bi 12 o 17 Cl 2 (JCPDS card No. 37-0702), proving that bismuth oxychloride Bi 12 o 17 Cl 2 .

[0027] image 3 For the DRS figure of the photocatalyst nanosheet laye...

Embodiment 3

[0029] An application of the bismuth oxychloride photocatalyst prepared by the preparation method of the bismuth oxychloride photocatalyst of the present invention in degrading sulfamethazine. With sulfamethazine as characteristic sulfonamide antibiotics, the catalyst prepared by the method of embodiment 1 and 2 carries out degradation experiment, wherein the concentration of the aqueous solution containing sulfamethazine is 10mg / L; Get catalyzer 100mg, be placed in 100ml above-mentioned In the sulfamethazine solution, stir 60min in darkroom, then solution is placed in visible light source, every 10min gets 2ml sulfamethazine solution, measures the concentration of sulfamethazine in the solution with HPLC-UV, Calculate the degradation rate.

[0030] The bismuth oxychloride photocatalyst obtained according to embodiment 1 and embodiment 2 degrades the degradation curve of sulfamethazine under visible light, see Figure 4 , After 1 hour of light, the degradation rates of the ca...

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Abstract

The invention discloses a preparation method for a bismuth oxychloride photocatalyst and application of the bismuth oxychloride photocatalyst to degradation of sulfamethazine. The preparation method comprises the following steps: dissolving bismuth chloride and sodium hydroxide in water, and stirring to obtain a mixed solution; performing a hydrothermal reaction on the mixed solution; after the reaction is ended, washing, centrifuging and drying to obtain the layered bismuth oxychloride photocatalyst, wherein the molecular formula of bismuth oxychloride is Bi12O17Cl2. The preparation method is easy to operate; raw materials are easily obtained; the catalytic efficiency in visible light is high; the preparation method has a broad application prospect in the field of photocatalysis; the prepared catalyst has the advantages of high purity, high controllability, low synthesis cost and the like, and can be used for degrading the sulfamethazine effectively.

Description

technical field [0001] The invention belongs to the technical field of material preparation and water environment pollution control, and relates to a preparation method of bismuth oxychloride photocatalyst and its application in degrading sulfamethazine. Background technique [0002] In recent years, pharmaceutical and personal care products (PPCP S ) has become a new class of environmental pollutants, among which antibiotics are mainly used for the prevention and treatment of human and animal diseases. Sulfonamide antibacterial drugs have antibacterial and broad-spectrum effects, but after entering the livestock and poultry body, they cannot be completely metabolized and will be excreted in the form of the original drug. The detection rate of sulfamethazine in livestock and poultry wastewater is high, but conventional chemical adsorption methods or physical methods cannot treat wastewater containing sulfamethazine well. [0003] Photocatalytic technology is a catalytic re...

Claims

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Application Information

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IPC IPC(8): B01J27/06C01G29/00C02F1/30C02F101/38
CPCC01G29/00C02F1/30B01J27/06C02F2305/10C02F2101/38C02F2101/40B01J35/39
Inventor 周成赟曾光明黄丹莲赖萃张辰程敏胡亮熊炜平温铭薛文静王荣忠邓锐
Owner HUNAN UNIV
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