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Synthesis method and application of magnesium ferrite/molybdenum sulfide heterostructure nanowires

A synthesis method and technology of magnesium ferrite, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., to achieve the effects of improving utilization rate, good reproducibility, reducing energy consumption and reaction cost

Active Publication Date: 2016-02-03
常熟市明远达无纺包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Spinel-type magnesium ferrite is a face-centered cubic close-packed spinel structure and n-type semiconductor, which has excellent magnetic and photoelectric properties, and more importantly, its band gap is about 1.9 electron volts, so spinel-type iron Magnesium ferrite can respond to visible light, which makes it a material for preparing photocatalytic potential matrix reactions. The separation and recombination of photogenerated electrons and holes makes spinel magnesium ferrite very good in degradation or hydrogen production. Ideal photocatalytic activity, in addition, molybdenum disulfide has excellent electronic conductivity, and molybdenum disulfide with a narrow band gap can also extend its light absorption range and improve light utilization efficiency; current research on magnesium ferrite and molybdenum sulfide There are many, but their composites are less studied, and the one-dimensional composites of molybdenum disulfide and spinel magnesium ferrite may be endowed with enhanced photoelectrochemical properties

Method used

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  • Synthesis method and application of magnesium ferrite/molybdenum sulfide heterostructure nanowires
  • Synthesis method and application of magnesium ferrite/molybdenum sulfide heterostructure nanowires
  • Synthesis method and application of magnesium ferrite/molybdenum sulfide heterostructure nanowires

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 The mass ratio of molybdenum sulfide and magnesium ferrite is 0.02

[0029] (1) Weigh 15mmol of ferric nitrate and 5mmol of magnesium nitrate and place in a 50mL test tube, then add 2.5mL of twice distilled water and 7.5mL of absolute ethanol and stir well, then add 1.3g of PVP (K90), and finally mix it well to get clarification solution, namely the electrospinning precursor.

[0030] (2) Draw 5mL of the precursor solution in a glass syringe, and then conduct electrospinning at 25KV through an electrospinning device, then collect the product, and calcinate it through a muffle furnace at 500°C to obtain magnesium ferrite; the electrospinning experiment is in It is carried out at 25 degrees Celsius and 55 degrees humidity, and the heating conditions during calcination are from 1°C / min to 400°C, and from 5°C / min to 500°C.

[0031] (3) Weigh 2mg of ammonium molybdate and 19mg of thiourea and mix evenly, then place them on both ends of the porcelain boat with...

Embodiment 2

[0032] Embodiment 2 The mass ratio of molybdenum sulfide and magnesium ferrite is 0.05

[0033] (1) Weigh 15mmol of ferric nitrate and 5mmol of magnesium nitrate and place in a 50mL test tube, then add 2.5mL of twice distilled water and 7.5mL of absolute ethanol and stir well, then add 1.3g of PVP (K90), and finally mix it well to get clarification solution, namely the electrospinning precursor.

[0034](2) Draw 5mL of the precursor solution in a glass syringe, and then conduct electrospinning at 25KV through an electrospinning device, then collect the product, and calcinate it through a muffle furnace at 500°C to obtain magnesium ferrite. The electrospinning experiment is in It is carried out at 25 degrees Celsius and 55 degrees humidity, and the heating conditions during calcination are from 1°C / min to 400°C, and from 5°C / min to 500°C.

[0035] (3) Weigh 5mg of ammonium molybdate and 47.5mg of thiourea and mix them evenly, then place them on both ends of the porcelain boa...

Embodiment 3

[0036] Embodiment 3 The mass ratio of molybdenum sulfide and magnesium ferrite is 0.1

[0037] (1) Weigh 15mmol of ferric nitrate and 5mmol of magnesium nitrate and place in a 50mL test tube, then add 2.5mL of twice distilled water and 7.5mL of absolute ethanol and stir well, then add 1.3g of PVP (K90), and finally mix it well to get clarification solution, namely the electrospinning precursor.

[0038] (2) Draw 5mL of the precursor solution in a glass syringe, and then conduct electrospinning at 25KV through an electrospinning device, then collect the product, and calcinate it through a muffle furnace at 500°C to obtain magnesium ferrite. The electrospinning experiment is in It is carried out at 25 degrees Celsius and 55 degrees humidity, and the heating conditions during calcination are from 1°C / min to 400°C, and from 5°C / min to 500°C.

[0039] (3) Weigh 10mg of ammonium molybdate and 95mg of thiourea and mix them evenly, then place them on both ends of the porcelain boat...

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Abstract

The invention belongs to the technical field of nanomaterial synthesis. Firstly, an electrostatic spinning method is adopted to synthesize magnesium ferrite, then an evaporation method is adopted to enable molybdenum sulfide to grow on the magnesium ferrite so as to form the magnesium ferrite / molybdenum sulfide heterostructure nanowires. The tetracycline degradation rate of the prepared magnesium ferrite / molybdenum sulfide heterostructure nanowires prepared by means of the synthesis method is up to 92% in 120 minutes, and the hydrogen production efficiency in a water and methanol mixed solution is 5.8 mmol / h.m<2>.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanometer materials. Firstly, magnesium ferrite is synthesized by an electrospinning method, and then molybdenum sulfide is grown on it by an evaporation method to form magnesium ferrite / molybdenum sulfide heterojunction nanowires. Background technique [0002] Photoelectrochemistry (PEC) is an emerging environmental energy technology that can effectively use solar energy to degrade dyes and produce hydrogen. In PEC, electrodes generate photogenerated charges and holes, and undergo oxidation-reduction reactions; semiconductor materials have relatively Wide bandgap structure and ideal physical and chemical stability play an important role in PEC. In addition to the properties of the semiconductor itself, the morphology of the semiconductor also plays a key role in the PEC performance of the photoelectrode; in today's society, PEC splitting water to produce hydrogen is a It is a promising techn...

Claims

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Application Information

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IPC IPC(8): B01J27/051A62D3/17C01B3/04
CPCY02E60/36
Inventor 白红叶李萌范伟强陈超李春发
Owner 常熟市明远达无纺包装材料有限公司
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