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Cobalt tungstate/bismuth composite acoustic catalyst as well as preparation method and application thereof

A technology of cobalt tungstate and composite sound, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of limitation, easy recombination of photogenerated charges, etc., and achieve low cost and good acoustic catalytic activity , The effect of low carrier density

Pending Publication Date: 2021-09-17
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a single CoWO 4 Semiconductors have the phenomenon that photogenerated charges are easy to recombine, which is limited in the application of traditional sonocatalytic processes

Method used

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  • Cobalt tungstate/bismuth composite acoustic catalyst as well as preparation method and application thereof
  • Cobalt tungstate/bismuth composite acoustic catalyst as well as preparation method and application thereof
  • Cobalt tungstate/bismuth composite acoustic catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 cobalt tungstate / bismuth composite acoustic catalyst (one) preparation method is as follows:

[0027] 1) CoWO 4 Preparation: 1.4551g Co(NO 3 ) 2 ·6H 2 O and 1.6493g Na 2 WO 4 2H 2 O was dissolved in a 100mL Erlenmeyer flask with 30mL of deionized water respectively; the two were mixed, and the mixture was magnetically stirred for 30min; after ultrasonic reaction for 30min, it was poured into a polytetrafluoroethylene reactor, and placed in a blast drying oven for 180 ℃ for 24 hours; after the reaction, filter with suction, dry at 80℃ for 2 hours, grind into a fine powder with an agate mortar, and obtain CoWO 4 powder.

[0028] 2) Measure 10.5993g NaPO 2 h 2 ·H 2 O was dissolved in an Erlenmeyer flask containing 50 mL of deionized water, and after magnetic stirring for 20 min, 0.45027 g of C was added 4 h 4 o 6 and 0.08g NaOH, after magnetic stirring for 30min, add 0.375g, 0.75g, 1.5g, 3g CoWO 4 , sonicated for 30min to obtain different CoWO 4...

Embodiment 2

[0035] Example 2CoWO 4 Effect of / Bi Composite Acoustic Catalyst on Catalytic Ultrasonic Degradation of Tetracycline Solution

[0036] Method: Weigh CoWO respectively 4 with Bi(NO 3 ) 3 ·5H 2 O cobalt tungstate / bismuth composite material CoWO with different molar ratios 4 / Bi each 20mg, add 20mL tetracycline solution with a concentration of 20mg / L, ultrasonic catalysis for 2h, ultrasonic power 200W, ultrasonic temperature 20°C. After the treated suspension is sampled and centrifuged, the supernatant is taken, and its UV-vis spectrum is measured within 200-400nm. The degradation rate of the tetracycline solution can be measured at its λ max = Absorbance at 351nm to calculate,

[0037] Formula is: degradation rate (%)=[(A 0 -A t ) / A 0 ]×100%

[0038] A 0 is the initial absorbance of the tetracycline solution;

[0039] A t is the absorbance of tetracycline solution under different experimental conditions;

[0040] The result is as Figure 4 As shown, when CoWO 4 wi...

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Abstract

The invention relates to a cobalt / bismuth tungstate composite acoustic catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving NaPO2H2. H2O in deionized water, conducting magnetic stirring, adding C4H4O6 and NaOH, continuing magnetic stirring, adding CoWO4, and carrying out ultrasonic treatment to obtain a solution A; dissolving Bi(NO3)3.5H2O in HNO3, and performing magnetic stirring to obtain a solution B; and dropwise adding the solution B into the solution A, performing magnetic stirring, putting an obtained mixture into a drying oven, carrying out hydrothermal synthesis reaction and suction filtration, cleaning an obtained product with deionized water, and performing drying to obtain the cobalt tungstate / bismuth composite acoustic catalyst. According to the invention, the surface of cobalt tungstate is wrapped with bismuth to form a wrapping structure, so electron hole separation efficiency is improved, and the acoustic catalytic activity of cobalt tungstate is greatly improved; and the method is low in cost and easy to operate and has good application prospects.

Description

technical field [0001] The invention belongs to the field of composite acoustic catalyst preparation, and in particular relates to a preparation method and application of a cobalt tungstate / bismuth composite acoustic catalyst. Background technique [0002] In recent years, a large amount of antibiotics and other drugs have been discharged into water bodies, posing a serious threat to the environment and human health. Therefore, it is urgent to develop safe and effective purification methods. Advanced oxidation processes (AOPs) have attracted extensive attention as the most effective organic degradation strategy due to their high performance, high efficiency in reducing toxicity, non-selectivity, and improved biodegradability. [0003] Semiconductor acoustic catalysis technology is a renewable and environmentally friendly technology with great development prospects. It has potential applications in degrading organic or inorganic pollutants in wastewater and purifying harmful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J37/34C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J23/888B01J37/343B01J37/10C02F1/36C02F2101/30C02F2101/34C02F2101/38B01J35/23B01J35/33
Inventor 王思幻徐亮刘妮萍吴学签王新
Owner LIAONING UNIVERSITY
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