CuWO4/Bi2WO6 compound as well as preparation method and application thereof

A compound and hydrothermal reaction technology, applied in the field of environmental pollution restoration, can solve the problems of high cost of reverse osmosis, low removal efficiency of precipitation method, harsh environment requirements of biological method, etc., and achieve the effect of high degradation rate and simple operation

Pending Publication Date: 2021-10-26
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal efficiency of the precipitation method is low; the adsorption method can only achieve solid-liquid separation and cannot be completely eliminated; the cost of the reverse osmosis method is high; the biological method has stricter environmental requirements

Method used

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  • CuWO4/Bi2WO6 compound as well as preparation method and application thereof
  • CuWO4/Bi2WO6 compound as well as preparation method and application thereof
  • CuWO4/Bi2WO6 compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] CuWO 4 / Bi 2 WO 6 The preparation method of compound comprises the following steps:

[0024] Step 1: Accurately weigh citric acid 0.192g, Bi(NO 3 ) 3 ·5H 2 O 0.970g, Na 2 WO 4 2H 2 0.330g, add 0.0121g, 0.0242g, 0.0363g, 0.0484g Cu (NO 3 ) 2 ·3H 2 0. Put it into a 250ml Erlenmeyer flask for later use, add 60mL of distilled water to the Erlenmeyer flask, stir magnetically for 30min, and then ultrasonicate for 30min (ultrasonic power 200W).

[0025] Step 2: Transfer the solution prepared in Step 1 to 100 ml of polytetrafluoroethylene, put it in an oven, and let it react at 180°C for 24 hours. After the reaction, cool to room temperature. The reactant in the reaction kettle was suction filtered to leave the filter residue, the filtrate was discarded, and then washed with water until the pH of the filtrate remained unchanged, and then washed 3 times with absolute ethanol, the filter residue was placed in a petri dish and then placed in an oven for When the temper...

Embodiment 2

[0028] Comparison of CuWO with different composite ratios 4 / Bi 2 WO 6 Compound sonication effect of tetracycline:

[0029] Step 1: Take 20 mL of tetracycline solution with a concentration of 20 mg / L in a beaker, add 0.02 g of 5% CuWO 4 / Bi 2 WO 6 , 10% CuWO 4 / Bi 2 WO 6 , 15% CuWO 4 / Bi 2 WO 6 , 20% CuWO 4 / Bi 2 WO 6 . Under the condition of power of 500W, ultrasonic for 60min.

[0030] Step 2: After the suspension is sampled and centrifuged, the supernatant is taken to measure the concentration of tetracycline, and the CuWO is calculated 4 / Bi 2 WO 6 The sonication efficiency of tetracycline by composites, it can be seen that CuWO with composite ratios of 0%, 5%, 10%, 15% and 20% 4 / Bi 2 WO 6 The degradation rates of the complex to tetracycline were 56.32±2.71%, 41.22±3.92%, 76.00±0.38%, 53.93±2.48% and 38.69±3.12% (see image 3 ).

[0031] According to the degradation rate of tetracycline by the compound, the compound with a compound ratio of 10% has t...

Embodiment 3

[0033] Comparing different concentrations of potassium persulfate, CuWO with a compound ratio of 10% 4 / Bi 2 WO 6 Steps in which the complex degrades the effects of tetracyclines:

[0034] Step 1: Take 20 mL of tetracycline solution with a concentration of 20 mg / L in a beaker, and add 20 mg of CuWO with a compounding ratio of 10% accurately weighed 4 / Bi 2 WO 6 For the composite, add potassium persulfate so that the concentration of potassium persulfate in the waste water is 0, 1, 2, 5, 10 mmol / L and sonicate for 60 min respectively.

[0035] Step 2: After the suspension is sampled and centrifuged, the supernatant is taken to measure the concentration of tetracycline, and the CuWO is calculated 4 / Bi 2 WO 6 Tetracycline degradation efficiency of the compound, it can be seen that the concentration of potassium persulfate is 0, 1, 2, 5, 10mmol / L, and the degradation rate of the compound to tetracycline is 76.00±0.38%, 80.60±0.75%, 83.66±0.91%, 86.86 ±0.24%, 98.32±0.39%. ...

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Abstract

The invention relates to the field of environmental pollution remediation, and particularly discloses a CuWO4 / Bi2WO6 compound as well as a preparation method and application thereof. The preparation method comprises the steps that Bi(NO3)3.5H2O, Na2WO4.2H2O, Cu(NO3)2.3H2O and citric acid serve as raw materials, a CuWO4 / Bi2WO6 compound is synthesized in a one-pot mode through a hydrothermal method, then ultrasonic treatment is combined, potassium persulfate is added, tetracycline in water is degraded, and experiment conditions are controlled as follows: the adding amount of a catalyst is 1 g / L, the initial concentration of tetracycline is 20 mg / L, the adding amount of potassium persulfate is 10 mmol / L, and the ultrasonic treatment time is 60 min. The degradation rate of the CuWO4 / Bi2WO6 compound prepared by the method on tetracycline in water can reach 98.3+ / -0.39%.

Description

technical field [0001] The invention relates to the field of environmental pollution restoration, and proposes a CuWO 4 / Bi 2 WO 6 The composite, its preparation method and its application in the sonocatalytic degradation of tetracyclines in water. [0002] technical background [0003] Tetracycline antibiotics are one of the most widely used antibiotics in livestock production and clinical use due to their low price. When used in low doses, it is widely used as a growth promoter for livestock and poultry; when used in high doses, it is also widely used to treat human diseases. However, due to the disadvantages of low raw material utilization rate and low purity in the production process of tetracycline antibiotics, the wastewater in the production process contains a large amount of tetracyclines. [0004] Acoustic catalysis is a new type of advanced oxidation method. With the help of cavitation caused by ultrasonic waves, the formation, growth and rupture of microbubbles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C02F1/00C02F101/38
CPCB01J23/888B01J35/002C02F1/00C02F2101/38
Inventor 孙亮王新刘彬史家豪
Owner LIAONING UNIVERSITY
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