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Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers

A technology of electrospinning method and electrospinning liquid, which is applied in the field of preparation of BiVO4 fiber by electrospinning method, can solve the problems of large powder particle size, complicated preparation process, long reaction cycle, etc., and achieve short preparation cycle and excellent preparation process Simple, easy-to-use effect

Active Publication Date: 2013-05-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional preparation methods include microemulsion method, chemical bath precipitation method, sol-gel method, etc., but the powder obtained by these methods has a large particle size, the preparation process is complicated, and the reaction cycle is long.

Method used

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  • Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers
  • Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers
  • Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of BiVO 4 Precursor solution:

[0031] 1.1) Mix 0.01200mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolved in 10mL of deionized water, placed on a magnetic stirrer and stirred evenly, then added 4.5ml of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0032] 1.2) Mix 0.012mol of ammonium metavanadate (NH 4 VO 3 ) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolve in 10mL of deionized water to obtain an orange-yellow mixed liquid, then stir the mixed liquid at a constant temperature for 30 minutes at 70°C, so that the color of the mixed liquid changes from orange to dark blue without precipitation, and obtain B solution;

[0033] 1.3) After the B solution is cooled to room temperature, mix the A solution and the B solution according to the molar ratio of n(Bi):n(V)=1:1, and stir for 30 minutes to obtain BiVO ...

Embodiment 2

[0039] 1) Preparation of BiVO 4 Precursor solution:

[0040] 1.1) Mix 0.01200mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolved in 10mL of deionized water, placed on a magnetic stirrer and stirred evenly, then added 4.5ml of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0041] 1.2) Mix 0.01200mol of ammonium metavanadate (NH 4 VO 3 ) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolve in 10mL of deionized water to obtain an orange-yellow mixed liquid, then stir the mixed liquid at a constant temperature for 30 minutes at 70°C, so that the color of the mixed liquid changes from orange to dark blue without precipitation, and obtain B solution;

[0042] 1.3) After the B solution is cooled to room temperature, mix the A solution and the B solution according to the molar ratio of n(Bi):n(V)=1:1, and stir for 30 minutes to obtain BiV...

Embodiment 3

[0049] 1) Preparation of BiVO 4 Precursor solution:

[0050] 1.1) Mix 0.01200mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolved in 10mL of deionized water, placed on a magnetic stirrer and stirred evenly, then added 4.5ml of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0051] 1.2) Mix 0.01200mol of ammonium metavanadate (NH 4 VO 3 ) and 0.01799mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Dissolve in 10mL of deionized water to obtain an orange-yellow mixed liquid, then stir the mixed liquid at a constant temperature for 30 minutes at 70°C, so that the color of the mixed liquid changes from orange to dark blue without precipitation, and obtain B solution;

[0052] 1.3) After the B solution is cooled to room temperature, mix the A solution and the B solution according to the molar ratio of n(Bi):n(V)=1:1, and stir for 30 minutes to obtain BiV...

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Abstract

The invention provides an electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers. The electrospinning preparation method of the BiVO4 fibers comprises the following steps: firstly, dissolving Bi (NO3)3.5H2O and citric acid monohydrate into deionized water, stirring uniformly, adding ethanolamine, and stirring till a clear state to obtain a solution A; secondly, dissolving ammonium metavanadate and the citric acid monohydrate into deionized water to obtain orange mixed liquid, and stirring the mixed liquid at a constant temperature of 70DEG C till the color of the mixed liquid turns from orange to dark blue and no sediment is generated so as to obtain a solution B; thirdly, mixing the solution A and the solution B to obtain a BiVO4 precursor solution; fourthly, uniformly mixing the BiVO4 precursor solution and an ethanol solution of polyvinylpyrrolidone to obtain an electrospinning solution; fifthly, filling the electrospinning solution into an injector with an injection needle of 0.5 microns, and spinning to obtain composite fibers on a receiving device; and finally, drying the composite fibers at room temperature, and heating to remove residual polyvinylpyrrolidone so as to obtain the BiVO4 fibers. The electrospinning preparation method is simple in process, convenient to operate and environment-friendly; and the prepared BiVO4 fibers have relatively good photocatalysis in ultraviolet light.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to an electrostatic spinning method for preparing BiVO 4 fiber method. Background technique [0002] Since the 20th century, environmental pollution has become more and more serious, and the energy crisis has become increasingly prominent, which has become a serious problem that threatens the survival and development of human beings. Among all kinds of environmental pollution, chemical pollution is the most common, most important and most influential. Therefore, effectively controlling and treating the damage of various chemical pollutants to the water resources, soil and atmospheric environment that constitute the most basic human existence is the focus of comprehensive environmental management, and the development of practical technologies that can make various chemical pollutants harmless is the key to environmental protection. The representative chemical pollution treatmen...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D5/00B01J23/22
Inventor 谈国强杨薇黄靖罗洋洋任慧君
Owner SHAANXI UNIV OF SCI & TECH
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