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Preparation and application of CeVO4/BiVO4 heterojunction with visible-light response

A heterojunction and microsphere technology, applied in the fields of light water/sewage treatment, chemical/physical process, water/sludge/sewage treatment, etc., can solve the problems of BiVO4 photocatalytic application limitation and other problems, and achieve the effect of easy industrial production.

Inactive Publication Date: 2018-11-27
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure BiVO 4 photocatalytic applications are still limited

Method used

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  • Preparation and application of CeVO4/BiVO4 heterojunction with visible-light response
  • Preparation and application of CeVO4/BiVO4 heterojunction with visible-light response
  • Preparation and application of CeVO4/BiVO4 heterojunction with visible-light response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] CaVO 4 / BiVO 4 The preparation steps of the heterojunction are:

[0031] Step 1, 0.001mol cerium nitrate Ce (NO 3 ) 3 ·6H 2 O and 0.002mol cerium nitrate Bi(NO 3 ) 3 ·5H 2 O was added to 20ml ethylene glycol solution, and magnetically stirred until dissolved;

[0032] Step 2, 0.015mol ammonium metavanadate NH 4 VO 3 Add to 25ml of distilled water at 50°C, stir magnetically until dissolved;

[0033] Step 3. Slowly drop the product of step 2 into the mixed solution of step 1, adjust the pH of the solution to 1, and sonicate at room temperature for 30 minutes;

[0034] Step 4: Add the product of Step 3 into a 100ml hydrothermal reactor, and react at a reaction temperature of 100°C for 4h.

[0035] Step 5: After step 4 is completed, filter, wash with distilled water and absolute ethanol respectively, then dry the product at 120°C for 12h, and then roast at 200°C for 5h.

[0036] From figure 1 It can be seen that the prepared CeVO 4 / BiVO 4 heterojunction, wh...

Embodiment 2

[0039] CaVO 4 / BiVO 4 The preparation steps of the heterojunction are:

[0040] Step 1, 0.001mol cerium nitrate Ce (NO 3 ) 3 ·6H 2 O and 0.01mol cerium nitrate Bi(NO 3 )3 ·5H 2 O was added to 65ml of glycerin solution, magnetically stirred until dissolved;

[0041] Step 2, 0.011mol ammonium metavanadate NH 4 VO 3 Add to 15ml of distilled water at 100°C, stir magnetically until dissolved;

[0042] Step 3. Slowly drop the product of step 2 into the mixed solution of step 1, adjust the pH of the solution to 6, and sonicate at room temperature for 120 minutes;

[0043] Step 4: Add the product of Step 3 into a 100ml hydrothermal reactor, and react at a reaction temperature of 200°C for 2h.

[0044] Step 5: After step 4 is completed, filter, wash with distilled water and absolute ethanol respectively, then dry the product at 120°C for 12h, and calcinate at 500°C for 1h.

Embodiment 3

[0046] CaVO 4 / BiVO 4 The preparation steps of the heterojunction are:

[0047] Step 1, 0.001mol cerium nitrate Ce (NO 3 ) 3 ·6H 2 O and 0.002mol cerium nitrate Bi(NO 3 ) 3 ·5H 2 O was added to 30ml propanol solution, and magnetically stirred until dissolved;

[0048] Step 2, 0.015mol ammonium metavanadate NH 4 VO 3 Add to 25ml of distilled water at 50°C, stir magnetically until dissolved;

[0049] Step 3. Slowly drop the product of step 2 into the mixed solution of step 1, adjust the pH of the solution to 1, and sonicate at room temperature for 30 minutes;

[0050] Step 4: Add the product of Step 3 into a 100ml hydrothermal reactor, and react at a reaction temperature of 100°C for 4h.

[0051] Step 5: After step 4 is completed, filter, wash with distilled water and absolute ethanol respectively, then dry the product at 120°C for 12h, and then roast at 200°C for 5h.

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Abstract

The invention provides preparation and application of CeVO4 / BiVO4 heterojunction with visible-light response. The preparation method comprises the specific steps that cerium nitrate Ce(NO3)3.6H2O andbismuth nitrate Bi(NO3)3.5H2O are added to an organic solvent and dissolved through magnetic stirring; ammonium metavanadate NH4VO3 is added to distilled water and dissolved through magnetic stirring;the solutions are mixed, the pH value is adjusted, after ultrasound treatment, the mixed solution is poured into a hydrothermal reaction kettle, and a reaction is conducted for 2-10 h at 100-200 DEGC; after cooling is conducted to the room temperature, a sample is centrifuged, washed, dried and roasted, and the CeVO4 / BiVO4 heterojunction is obtained. Through the catalyst, under visible light irradiation, the target pollutant levofloxacin is efficiently degraded. According to the method, the synthetic route is simple and easy to control, the shape reproducibility is good, and the method is suitable for meeting the demand of industrial large-batch production.

Description

technical field [0001] The present invention relates to a visible light responsive CeVO 4 / BiVO 4 The preparation method of the heterojunction belongs to the technical field of environmental chemical photocatalytic water treatment, and in particular relates to visible light treatment of antibiotic-contaminated wastewater. Background technique [0002] Levofloxacin is a third-generation fluoroquinolone broad-spectrum antibacterial drug. It can promote the growth of livestock and poultry when added in low doses, and can be used to treat diseases when used in high doses. of antibiotics. However, after levofloxacin enters the animal body, most of it enters the water body as the original drug or metabolites, which seriously pollutes the water body. Therefore, how to efficiently eliminate antibiotics to improve the quality of water environment has attracted the attention of many countries. The cost of antibiotic wastewater is complex, COD Cr The characteristics of high concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/02C02F1/30C02F101/34C02F101/36C02F101/38B01J35/00
CPCC02F1/30B01J23/002B01J23/22C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J2523/00B01J35/39B01J35/40B01J2523/3712B01J2523/55B01J2523/54
Inventor 陆光伦子帅张爽王菲王辉梁红玉
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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