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Method for preparing polyvinyl alcohol BiVO4 composite fiber by electrostatic spinning method

An electrospinning, polyvinyl alcohol technology, applied in spinning solution preparation, fiber processing, filament/thread forming, etc., can solve the problems of complex preparation process, large powder particle size, long reaction period, etc. The preparation method is simple, the cost is low, and the reaction time is short.

Active Publication Date: 2015-01-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is because of BiVO 4 With such excellent performance, scholars at home and abroad attach great importance to it, but most of them regard BiVO as 4 Prepared into powder, and BiVO prepared by traditional preparation methods such as microemulsion method, chemical bath precipitation method, sol-gel method, etc. 4 The powder particle size is large, the preparation process is complicated, and the reaction cycle is long

Method used

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  • Method for preparing polyvinyl alcohol BiVO4 composite fiber by electrostatic spinning method
  • Method for preparing polyvinyl alcohol BiVO4 composite fiber by electrostatic spinning method
  • Method for preparing polyvinyl alcohol BiVO4 composite fiber by electrostatic spinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Preparation of BiVO 4 Precursor solution:

[0030] 1.1) Mix 0.010mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.015mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water, place on a magnetic stirrer and stir evenly, then add 3.75mL of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0031] 1.2) Mix 0.010mol of ammonium metavanadate (NH 4 VO 3 ) and 0.015mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water to obtain an orange-yellow mixed liquid; then stir at a constant temperature at 70°C for 30 minutes to make the color of the mixed liquid change to dark blue without precipitation, and obtain B solution;

[0032] 1.3) Mix solution A and solution B according to the molar ratio of n(Bi):n(V)=1:1, and stir for 30 minutes to obtain BiVO 4 Precursor solution;

[0033] 2) Preparation of electrospinning solution:

[0034] According to the volume ratio of...

Embodiment 2

[0038] 1) Preparation of BiVO 4 Precursor solution:

[0039] 1.1) Mix 0.010mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H2 O) and 0.015mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water, place on a magnetic stirrer and stir evenly, then add 3.75mL of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0040] 1.2) Mix 0.012mol of ammonium metavanadate (NH 4 VO 3 ) and 0.018mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water to obtain an orange-yellow mixed liquid; then stir at a constant temperature at 70°C for 30 minutes to make the color of the mixed liquid change to dark blue without precipitation, and obtain B solution;

[0041] 1.3) Mix solution A and solution B according to the molar ratio of n(Bi):n(V)=1:1.2, and stir for 30 minutes to obtain BiVO 4 Precursor solution;

[0042] 2) Preparation of electrospinning solution:

[0043] According to the volume ratio of...

Embodiment 3

[0047] 1) Preparation of BiVO 4 Precursor solution:

[0048] 1.1) Mix 0.012mol of bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.018mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water, place on a magnetic stirrer and stir evenly, then add 4.5mL of ethanolamine (C 2 h 7 NO) and continue to stir until clear to obtain A solution;

[0049] 1.2) Mix 0.012mol of ammonium metavanadate (NH 4 VO 3 ) and 0.018mol of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add 10mL of deionized water to obtain an orange-yellow mixed liquid; then stir at a constant temperature at 70°C for 30 minutes to make the color of the mixed liquid change to dark blue without precipitation, and obtain B solution;

[0050] 1.3) Mix solution A and solution B according to the molar ratio of n(Bi):n(V)=1:1, and stir for 30 minutes to obtain BiVO 4 Precursor solution;

[0051] 2) Preparation of electrospinning solution:

[0052] According to the volume ratio of ...

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Abstract

The invention provides a method for preparing polyvinyl alcohol BiVO4 composite fiber by an electrostatic spinning method. The method comprises the following steps of: firstly adding Bi(NO3)3.5H2O and citric acid monohydrate in deionized water and stirring evenly, and then adding ethanolamine and continuously stirring to be clear so as to obtain a solution A; then adding ammonium metavanadate and the citric acid monohydrate in the deionized water to obtain orange mixed liquid, stirring at the constant temperature of 70 DEG C to enable the color of the mixed liquid to turn into dark blue without precipitation, and obtaining a solution B; mixing the solution B and the solution A, and stirring to obtain a precursor solution; then evenly mixing the precursor solution and a polyvinyl alcohol solution binding agent to prepare an electrostatic spinning solution; and finally putting the electrostatic spinning solution into a syringe to start spinning, and collecting the prepared polyvinyl alcohol BiVO4 composite fiber by a receiver. The preparation method provided by the invention is simple and convenient, low in energy consumption and cost, and environmentally-friendly, the prepared polyvinyl alcohol BiVO4 composite fiber has good dispersibility, and nanofiber with good appearance can be obtained in a high-voltage electric field.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to an electrospinning method for preparing polyvinyl alcohol BiVO 4 method of compounding fibers. Background technique [0002] Since the 1970s, BiVO 4 With its superior technical performance, it has attracted more and more attention from scholars from all over the world. BiVO 4 Not only has ferroelasticity, but also has the characteristics of acousto-optic conversion and ion conductivity, so BiVO 4 It has a good application prospect in the field of ion-conducting ceramics. BiVO 4 There are mainly three crystal phases, namely, tetragonal zircon phase, monoclinic scheelite phase and tetragonal scheelite phase. Among them, the band gap of monoclinic phase bismuth vanadate is 2.3-2.4eV, and its high enough valence band is completely holes can be achieved (h + ) for the degradation of organic pollutants, and the position of the conduction band is also conducive to the reductio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/50D01F1/10D01D1/02D01D5/00
Inventor 任慧君杨薇谈国强黄靖罗洋洋
Owner SHAANXI UNIV OF SCI & TECH
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