Bismuth trioxide nanotubes prepared by microwave-assisted liquid-phase process and application thereof

A bismuth trioxide, microwave-assisted technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unreported tetracycline wastewater, reduce energy consumption and reaction costs, The effect of easy mass production and low synthesis temperature

Inactive Publication Date: 2013-05-22
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that bismuth trioxide photocatalytically treats nitrite-containing wastewater, sulfite was

Method used

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  • Bismuth trioxide nanotubes prepared by microwave-assisted liquid-phase process and application thereof
  • Bismuth trioxide nanotubes prepared by microwave-assisted liquid-phase process and application thereof
  • Bismuth trioxide nanotubes prepared by microwave-assisted liquid-phase process and application thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0030] Example 1:

[0031] This example provides a microwave-assisted liquid phase method for preparing bismuth trioxide (Bi 2 O 3 ) Nanotube method, follow the steps below:

[0032] A. Weigh out 0.95g of Bi(NO 3 ) 3 ·5H 2 O and 0.45g Na 2 SO 4 , Dissolved in 40mL deionized water, ultrasonic and magnetic stirring for 1 hour to form a mixed solution;

[0033] B. Weigh 0.70 g of NaOH, add 40 mL of deionized water, and ultrasonically make it uniformly dispersed to form a transparent sodium hydroxide solution;

[0034] C. Add the transparent sodium hydroxide solution obtained in step B dropwise to the mixed solution obtained in step A under magnetic stirring;

[0035] D. Transfer the solution obtained in step C to a quartz container with a capacity of 100 mL, and place it in a microwave reactor with a microwave power of 800 W. The temperature is raised to 80° C. for 10 minutes, and the product is naturally cooled.

[0036] E. Centrifuge the product obtained in step D, and wash three times wi...

Example Embodiment

[0038] Example 2:

[0039] This example provides a microwave-assisted liquid phase method for preparing bismuth trioxide (Bi 2 O 3 ) Nanotube method, follow the steps below:

[0040] A. Weigh 1.00g of Bi(NO 3 ) 3 ·5H 2 O and 0.50g Na 2 SO 4 , Dissolved in 40mL deionized water, ultrasonic and magnetic stirring for 1 hour to form a mixed solution;

[0041] B. Weigh 0.75g of NaOH, add 40mL of deionized water, and ultrasonically make it uniformly dispersed to form a transparent sodium hydroxide solution;

[0042] C. Add the transparent sodium hydroxide solution obtained in step B dropwise to the mixed solution obtained in step A under magnetic stirring;

[0043] D. Transfer the solution obtained in step C to a quartz container with a capacity of 100 mL, and place it in a microwave reactor with a microwave power of 800 W. The temperature is raised to 100° C. for 20 min, and the product is naturally cooled.

[0044] E. Centrifuge the product obtained in step D, and wash three times with deioni...

Example Embodiment

[0046] Example 3:

[0047] This example provides a microwave-assisted liquid phase method for preparing bismuth trioxide (Bi 2 O 3 ) Nanotube method, follow the steps below:

[0048] A. Weigh out 0.95g of Bi(NO 3 ) 3 ·5H 2 O and 0.45g Na 2 SO 4 , Dissolved in 40mL deionized water, ultrasonic and magnetic stirring for 1 hour to form a mixed solution;

[0049] B. Weigh 0.75g of NaOH, add 40mL of deionized water, and ultrasonically make it uniformly dispersed to form a transparent sodium hydroxide solution;

[0050] C. Add the transparent sodium hydroxide solution obtained in step B dropwise to the mixed solution obtained in step A under magnetic stirring;

[0051] D. Transfer the solution obtained in step C to a quartz container with a capacity of 100 mL, and place it in a microwave reactor with a microwave power of 800 W. The temperature is raised to 100° C. for 20 min, and the product is naturally cooled.

[0052] E. Centrifuge the product obtained in step D, and wash three times with de...

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Abstract

The invention relates to a method for preparing bismuth trioxide (Bi2O3) nanotubes by a microwave-assisted liquid-phase process and application of the bismuth trioxide (Bi2O3) nanotubes in photodegradating tetracycline-containing wastewater. The preparation method comprises the following steps: magnetically stirring proper amounts of Bi(NO3)3.5H2O and Na2SO4 to form a mixed solution, carrying out ultrasonic dispersion on NaOH and deionized water to form a sodium hydroxide transparent solution, and dropwisely adding the sodium hydroxide transparent solution into the Bi(NO3)3.5H2O/Na2SO4 mixed solution; and continuously heating in a reactor with the microwave power of 800W to obtain the product, centrifuging, washing and drying to obtain the bismuth trioxide (Bi2O3) nanotubes with uniform appearance. The invention has the advantages of simple technique and reproducibility; and the raw materials are cheap and accessible inorganic compounds, are low in cost, do not need pretreatment of high temperature and calcining, and have the advantages of low synthesis temperature and short reaction time, thereby lowering the energy consumption and reaction cost and facilitating the mass production. Since the bismuth trioxide (Bi2O3) has strong photocatalytic degradation capacity for tetracycline, the invention is feasible in practical application.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials and environmental materials, and relates to a method for preparing bismuth trioxide nanotubes, in particular to a microwave-assisted liquid phase method for preparing bismuth trioxide nanotubes and its application. Background technique [0002] In recent decades, semiconductor-based photocatalytic degradation of organic pollutants has become one of the research hotspots to provide feasible solutions to many existing and potential environmental problems. At present, titanium dioxide with high catalytic activity, good stability and non-toxicity is widely used; but because of its wide band gap (3.2eV), it can only absorb ultraviolet light which accounts for only 4% of solar energy, so its catalytic performance needs to be further improved. , how to use the visible light of solar energy to partially degrade organic pollutants, that is, catalysts with high catalytic...

Claims

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Application Information

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IPC IPC(8): C01G29/00B82Y30/00C02F1/30
CPCY02W10/37
Inventor 关卫省张格红吕平海高航范芳芳
Owner CHANGAN UNIV
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