Preparation method of bismuth vanadate nanometer rods

A technology of nanorods and bismuth vanadate, applied in the field of photocatalytic degradation of organic pollutants, can solve the problems of reduced photocatalytic efficiency, long transmission distance, small specific surface area, etc., shorten the transmission distance, improve hole survival rate, crystal small size effect

Active Publication Date: 2017-09-26
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large particle size of conventional bismuth vanadate crystals, the photogenerated electrons and holes have a long transmission distance to the catalyst surface, and are easy to recombine during the long-distance migration process, reducing the photocatalytic efficiency.
Secondly, conventional bismuth vanadate crystals have a small specific surface area and cannot effectively adsorb pollutants, which also greatly reduces the photocatalytic efficiency.

Method used

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  • Preparation method of bismuth vanadate nanometer rods
  • Preparation method of bismuth vanadate nanometer rods
  • Preparation method of bismuth vanadate nanometer rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Bi(NO 3 ) 3 ·5H 2 O is dissolved in 1mol / L nitric acid solution to obtain A solution;

[0028] 2) will be compared with Bi(NO 3 ) 3 ·5H 2 O equimolar amount of NH 4 VO 3 Dissolve in 1mol / L ammonia solution to obtain B solution;

[0029] 3) Slowly add solution A to solution B, stir well, adjust the pH to 6.5, and continue stirring for 30-120 minutes to obtain a mixed solution;

[0030] 4) Add sodium edetate to the mixed solution, the amount of sodium edetate is Bi(NO 3 ) 3 ·5H 2 3 times the weight of O, stirred, adjusted to PH to 8, stirred for 15 minutes, and ultrasonically dispersed to obtain a precursor solution;

[0031] 5) Add the precursor liquid into the autoclave, conduct hydrothermal reaction at 160°C for 3 hours, cool, filter, wash the precipitate with deionized water and / or ethanol three times, centrifuge, Dry at 40° C. for 4 h to obtain bismuth vanadate nanorods.

[0032] Depend on figure 1 It can be seen that the bismuth vanadate nanorods ha...

Embodiment 2

[0034] 1) Bi(NO 3 ) 3 ·5H 2 O was dissolved in 4mol / L nitric acid solution to obtain A solution;

[0035] 2) will be compared with Bi(NO 3 ) 3 ·5H 2 O equimolar amount of NH 4 VO 3 Dissolved in 4mol / L ammonia solution to obtain B solution;

[0036] 3) Slowly add solution A to solution B, stir well, adjust the pH to 8, and continue stirring for 120 minutes to obtain a mixed solution;

[0037] 4) Add sodium edetate to the mixed solution, the amount of sodium edetate is Bi(NO 3 ) 3 ·5H 2 5 times the weight of O, stir, adjust the pH to 9, stir for 60min, and ultrasonically disperse to obtain the precursor solution;

[0038] 5) Add the precursor liquid into the autoclave, conduct hydrothermal reaction at 200°C for 10 hours, cool, filter, wash the precipitate with deionized water and / or ethanol 5 times, centrifuge, Dry at 100° C. for 24 hours to obtain bismuth vanadate nanorods.

[0039] The results of transmission electron microscopy showed that the bismuth vanadate na...

Embodiment 3

[0041] 1) Bi(NO 3 ) 3 ·5H 2 O was dissolved in 3mol / L nitric acid solution to obtain A solution;

[0042] 2) will be compared with Bi(NO 3 ) 3 ·5H 2 O equimolar amount of NH 4 VO 3 Dissolve in 2mol / L ammonia solution to obtain B solution;

[0043] 3) Slowly add solution A to solution B, stir well, adjust the pH to 7.5, and continue stirring for 90 minutes to obtain a mixed solution;

[0044] 4) Add sodium edetate to the mixed solution, the amount of sodium edetate is Bi(NO 3 ) 3 ·5H 2 4 times the weight of O, stir, adjust the pH to 8.5, stir for 45min, and ultrasonically disperse to obtain the precursor solution;

[0045] 5) Add the precursor liquid into the autoclave, conduct hydrothermal reaction at 180°C for 6 hours, cool, filter, wash the precipitate with deionized water and / or ethanol 4 times, centrifuge, Dry at 80° C. for 12 hours to obtain bismuth vanadate nanorods.

[0046] The results of transmission electron microscopy showed that the bismuth vanadate nano...

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Abstract

The invention discloses a preparation method of bismuth vanadate nanometer rods. The method comprises the following steps of (1) dissolving Bi(NO3)3 5H2O into a nitric acid solution to obtain a solution A; (2) dissolving NH4VO3 into an ammonia water solution to obtain a solution B; (3) slowly adding the solution A into the solution B; uniformly stirring the mixture; regulating the pH to 6.5 to 8; continuously stirring the materials for 30 to 120 min to obtain a mixed solution; (4) adding sodium ethylene diamine tetracetate into the mixed solution; performing stirring; regulating the PH to 8 to 9; performing stirring for 15 to 60 min; then, performing ultrasonic dispersion to obtain a precursor solution; (5) adding the precursor solution into a high-pressure reaction kettle; performing hydrothermal reaction under the condition of 160 to 200 DEG C for the reaction time being 3 to 10h; performing cooling and filtering; performing washing, centrifugation and drying on precipitates to obtain the bismuth vanadate nanometer rods. The prepared bismuth vanadate nanometer rods have the advantages of small size, large specific surface area and high photocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of organic pollutants, in particular to a preparation method of bismuth vanadate nanorods. Background technique [0002] Environmental pollution has become a global problem, which not only hinders the rapid development of society but also threatens human health. Among all kinds of environmental pollution, chemical pollution has the greatest impact. Photocatalytic technology can be realized at room temperature, and uses solar energy, which is low in cost, safe and environmentally friendly. Semiconductor materials all have photocatalytic activity, and the mechanism of photocatalytic reactions has gradually been recognized. Among many semiconductor photocatalyst materials, titanium dioxide is the most typical. It has the advantages of strong oxidation, good light induction, good hydrophilicity, stability and non-toxicity, etc., and has a good application in the treatment of envir...

Claims

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Application Information

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IPC IPC(8): C01G29/00B01J23/18B01J37/03B01J35/02B82Y40/00
CPCB82Y40/00C01G29/00B01J23/002B01J23/18B01J37/031C01P2002/72C01P2002/01C01P2004/04C01P2004/16C01P2004/54B01J35/393B01J35/23B01J35/39B01J35/40
Inventor廖日权何光耀于汉玉熊拯尹艳镇钟书明付满亢振军王宝宇
OwnerQINZHOU UNIV