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Beaded iron molybdate nanofiber photocatalyst as well as preparation method and application

A technology of nanofibers and iron molybdate, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Small size, low catalytic activity, etc., to achieve strong adsorption capacity, improve photocatalytic performance and photoelectric conversion efficiency, and large specific surface area

Active Publication Date: 2020-11-17
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned iron molybdate nanosheets have the disadvantages of small specific surface area, easy agglomeration, and low catalytic activity.

Method used

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  • Beaded iron molybdate nanofiber photocatalyst as well as preparation method and application
  • Beaded iron molybdate nanofiber photocatalyst as well as preparation method and application
  • Beaded iron molybdate nanofiber photocatalyst as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of beaded iron molybdate nanofibers, comprising the following steps:

[0052] (1) Add 1g of citric acid to a mixed solvent consisting of 4mL of absolute ethanol and 6mL of water, seal it (avoid the volatilization of water, ethanol and other solvents to affect the results), and stir until it is completely dissolved; add 0.15mmol of ammonium molybdate and 2mmol of nine Iron nitrate in water, stirred for 30 minutes; then added 1.5mL of hydrochloric acid solution with a mass concentration of 37wt%, and stirred until clear to obtain an iron molybdate precursor solution;

[0053] (2) Add 6 mL of the ferric molybdate precursor solution prepared in step (1) to a mixed solvent consisting of 10 mL of absolute ethanol and 3 mL of water, stir well, add 1.5 g of polyvinylpyrrolidone (PVP), and stir until dissolved complete, add 1.5mL of hydrochloric acid solution with a mass concentration of 37wt%, and stir evenly to obtain the iron molybdate precursor sol;

[...

Embodiment 2

[0061] A preparation method of beaded iron molybdate nanofibers, comprising the following steps:

[0062] (1) Add 1g of citric acid to a mixed solvent consisting of 4mL of absolute ethanol and 6mL of water, seal it (avoid the volatilization of water, ethanol and other solvents to affect the results), and stir until it is completely dissolved; add 0.15mmol of ammonium molybdate and 2mmol of nine Ferric nitrate in water, stirred for 30 minutes; then 2 mL of hydrochloric acid solution with a mass concentration of 37 wt% was added, and stirred until clear to obtain an iron molybdate precursor solution;

[0063] (2) Add 6 mL of the ferric molybdate precursor solution prepared in step (1) to a mixed solvent consisting of 10 mL of absolute ethanol and 3 mL of water, stir well, add 1.5 g of polyvinylpyrrolidone (PVP), and stir until dissolved complete, add 2mL of hydrochloric acid solution with a mass concentration of 37wt%, and stir evenly to obtain the iron molybdate precursor sol; ...

Embodiment 3

[0067] A preparation method of beaded iron molybdate nanofibers, the steps are as follows:

[0068] (1) Add 1g of citric acid to a mixed solvent consisting of 4mL of absolute ethanol and 6mL of water, seal it (avoid the volatilization of water, ethanol and other solvents to affect the results), and stir until it is completely dissolved; add 0.15mmol of ammonium molybdate and 2mmol of nine Iron nitrate in water, stirred for 30 minutes; then 2.5 mL of hydrochloric acid solution with a mass concentration of 37 wt% was added, and stirred until clear to obtain an iron molybdate precursor solution;

[0069] (2) Add 6 mL of the ferric molybdate precursor solution prepared in step (1) to a mixed solvent consisting of 10 mL of absolute ethanol and 3 mL of water, stir well, add 1.5 g of polyvinylpyrrolidone (PVP), and stir until dissolved complete, add 2.5mL of hydrochloric acid solution with a mass concentration of 37wt%, and stir evenly to obtain the iron molybdate precursor sol;

[...

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Abstract

The invention provides beaded iron molybdate nanofibers as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, citric acid is addedinto a mixed solvent of absolute ethyl alcohol and water, sealing and complete dissolving are carried out; a molybdenum source, an iron source and an acid solution are added to obtain an iron molybdate precursor solution; the iron molybdate precursor solution is added into a mixed solvent of absolute ethyl alcohol and water, uniform stirring is carried out, polyvinylpyrrolidone is added to be completely dissolved, and an acid solution is added to obtain iron molybdate precursor sol; then electrostatic spinning is carried out on the iron molybdate precursor sol to obtain iron molybdate precursor fibers; and finally, drying and calcining are carried out on the iron molybdate precursor fibers to obtain the beaded iron molybdate nanofibers. The beaded iron molybdate nanofibers prepared through electrostatic spinning has a large specific surface area and high adsorption capacity, the photocatalytic performance and the photoelectric conversion efficiency of iron molybdate can be improved, and ciprofloxacin can be better degraded; and meanwhile the preparation method is simple in step and low in cost.

Description

technical field [0001] The invention relates to a beaded iron molybdate nanofiber photocatalyst material and a preparation method and application thereof, belonging to the technical field of inorganic photocatalytic materials. Background technique [0002] With the rapid development of science and technology in today's society, the industrial economy is developed, and the control of environmental pollution has become one of the most important problems that people face. Photocatalytic technology is green and non-polluting, and has attracted people's attention in the control of environmental pollution. It can be used in various aspects, such as water purification, sterilization, self-cleaning, air purification and heat dissipation, etc., and with its low cost and excellent performance, semiconductor photocatalysts have gradually become a research hotspot in the field of water pollution treatment. [0003] Since 1972, Fujishima and Honda (Nature 1972,238,37-8) used traditional...

Claims

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Application Information

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IPC IPC(8): D01F9/08B01J23/881B01J35/02B01J35/10
CPCD01F9/08B01J23/881B01J35/394B01J35/61B01J35/39B01J35/40Y02W10/37
Inventor 卢启芳吕佳顺郭恩言魏明志
Owner QILU UNIV OF TECH
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