Method for preparing square bismuth oxychloride with adjustable thickness through hydrothermal method

A technology of bismuth oxychloride and hydrothermal method, which is applied in chemical instruments and methods, catalyst activation/preparation, oxidized water/sewage treatment, etc., can solve the problems of cumbersome preparation and long time consumption, and achieve simple process, low cost, excellent The effect of photocatalytic activity

Inactive Publication Date: 2019-12-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, these methods all have disadvantages such as time-consuming and cumbersome preparation.

Method used

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  • Method for preparing square bismuth oxychloride with adjustable thickness through hydrothermal method
  • Method for preparing square bismuth oxychloride with adjustable thickness through hydrothermal method
  • Method for preparing square bismuth oxychloride with adjustable thickness through hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Preparation of BiOCl photocatalyst with adjustable thickness

[0019] First disperse 0.9g of mannitol in 60mL of ultrapure water, stir thoroughly to dissolve, then add 0.97g of Bi(NO 3 ) 3 ·5H 2 O was added to it. After stirring for 20 minutes, different amounts of PVP (0, 0.1, 0.4g) were added respectively. After stirring for 10-20 minutes, saturated sodium chloride solution was added. After stirring for 30 minutes, the above homogeneous suspension was transferred to 100mL Teflon-lined stainless steel autoclave, and keep at 160°C for 3 hours. After cooling to room temperature, the obtained precipitate is centrifuged, washed repeatedly with ultrapure water and ethanol, and dried at 80°C to obtain BiOCl with different thicknesses. The BiOCl photocatalyst in the present invention will be determined by X-ray diffraction (XRD), such as figure 1 , The characteristic peaks of BiOCl in XRD can correspond to the standard card 85-0861 one-to-one, and there is no other imp...

Embodiment 2

[0021] Example 2: Photocatalyst visible light degradation of norfloxacin.

[0022] The photocatalyst samples obtained in the above implementation examples were subjected to an experiment of degrading norfloxacin, and BiOCl with different thicknesses was degraded under visible light for 60 minutes. Take 100 mL of 20 mg / L norfloxacin solution, add 0.05 g of photocatalyst, and put it in the photocatalytic instrument, and react in the dark for 30 minutes before reaching the adsorption-desorption equilibrium. Turn on the light to perform the photocatalytic reaction under visible light. Take 4mL samples every 20min, and immediately pass the solution through a 0.45μm water phase filter. A total of 7 samples were taken, and the concentration of the obtained sample was measured by liquid chromatography. Calculate the removal rate R=(C 0 -C X ) / C 0 , Where R is the removal rate, C 0 Is the initial concentration of norfloxacin in the solution, C X It is the concentration of norfloxacin in...

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Abstract

The invention discloses a method for preparing square bismuth oxychloride with the adjustable thickness through a hydrothermal method. The method comprises the steps that Bi(NO3)3.5H2O and mannitol are dispersed in 50-100 ml ultrapure water at the molar ratio of 1:50, and stirring is conducted for 10-30 min till the Bi(NO3)3.5H2O and the mannitol are totally dissolved; then polyvinylpyrrolidone isadded, stirring is conducted till 10-20 min after full dissolving, then 5-10 mL of a saturated sodium chloride solution is added, stirring is conducted for 10-20 min, and then a mixture is transferred into a hydrothermal reactor for a hydrothermal reaction for 2-5 h at 150-180 DEG C; and after cooling, obtained precipitate is centrifuged, repeatedly washed with the ultrapure water and ethyl alcohol, and dried at 60-80 DEG C to obtain BiOCl photocatalytic materials with different thicknesses. The method is quite simple in technology, the BiOCl photocatalytic materials are low in cost and easyto obtain, the cost is low, the reaction time is short, thus energy consumption and the reaction cost are reduced, batch production is facilitated, the poisonless and harmless effects are achieved, and environmentally friendly requirements are met.

Description

Technical field [0001] The invention belongs to the field of semiconductor material preparation technology and application, and specifically relates to a method for preparing a square bismuth oxychloride photocatalyst with adjustable thickness by a hydrothermal method, which can be used to degrade norfloxacin pollution under visible light. Background technique [0002] The increase in microbial resistance and antibiotic resistance caused by antibiotics in natural water has attracted great attention. Many antibiotics detected in the aquatic environment, even at different concentrations, may cause antibiotic resistance and adversely affect aquatic wildlife, ecosystems and human health. Fluoroquinolone (FQ) is one of the most consumed antibiotics in the world, with a total annual consumption of approximately 44,000 tons. Norfloxacin is the second-generation synthetic FQ, widely used in the treatment of veterinary and human infections. Since only a small part of the drug can be abs...

Claims

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Application Information

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IPC IPC(8): C01G29/00B82Y40/00B01J27/06B01J37/10C02F1/30C02F1/72C02F101/38
CPCC01G29/00B82Y40/00B01J27/06B01J37/10C02F1/30C02F1/725C02F2101/38C02F2305/10C01P2004/24B01J35/39
Inventor 郑天铭闫振华江润仁
Owner HOHAI UNIV
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