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Electrospinning synthesis method of MoO3 sheet structure

A technology of electrospinning and synthesis method, applied in the field of electrospinning synthesis of MoO3 sheet structure, can solve the problems of difficult to grasp the technical route, obvious agglomeration phenomenon, many controlled factors, etc., and achieves narrow particle size distribution range, raw material Wide source, good repeatability

Active Publication Date: 2019-01-15
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, MoO prepared by electrospinning 3 The morphology of nanomaterials is mostly one-dimensional micro-nano structure, the agglomeration phenomenon is obvious, and the dispersion is poor. There is still a lot of room for improvement in its various properties.
So far, no electrospinning method has been found to prepare MoO 3 Sheet-like structure was reported, MoO 3 The synthesis process of the sheet structure is controlled by many factors, and the technical route is difficult to grasp

Method used

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  • Electrospinning synthesis method of MoO3 sheet structure
  • Electrospinning synthesis method of MoO3 sheet structure
  • Electrospinning synthesis method of MoO3 sheet structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1.1 Add 0.4115 g of molybdenum pentachloride (MoCl 5 ), 0.0212 g of hydroxylamine hydrochloride, 0.0174 g of dopamine hydrochloride, and 0.8325 g of PVP were added to a mixed solvent of 1.0 mL of ethanol, 3.8 mL of DMF and 0.2 mL of 1,5-pentanediol, and stirred to obtain a spinning solution ;

[0028] 1.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were as follows: positive voltage 18 KV, negative voltage 0.5 KV, receiving distance 18 cm, and syringe advancing speed 0.002 mm / s.

[0029] 1.3 Fold the precursor fiber and lay it flat in the ark. Under the air atmosphere, the temperature is raised from room temperature to 500 °C at a rate of 1 °C / min, and the temperature is kept for 2 h. The sample is cooled with the furnace to obtain the product.

[0030] The XRD result of the product is as follows figure 1 It can be seen from the figure that all the diffraction peaks are consistent with the standard XRD card (35-0609),...

Embodiment 2

[0032] 2.1 Add 0.2194 g of MoCl 5 , 0.0056 g of hydroxylamine hydrochloride, 0.0062 g of dopamine hydrochloride, and 0.3552 g of PVP were added to a mixed solvent of 1.0 mL of ethanol, 2.7 mL of DMF and 0.3 mL of 1,5-pentanediol, and stirred to obtain a spinning solution;

[0033] 2.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were as follows: positive voltage 15 KV, negative voltage 0.5 KV, receiving distance 16 cm, and syringe advancing speed 0.001 mm / s.

[0034] 2.3 Fold the precursor fiber and spread it flat in the ark, and raise the temperature from room temperature to 550 °C at a rate of 1 °C / min in the air atmosphere, and keep it warm for 5 h. After the sample is cooled with the furnace, MoO is obtained. 3 Sheet structure. MoO 3 The sheet-like structure is relatively uniform in size and good in dispersion, with a size of 1.4-1.7 μm and a thickness of 220-260 nm.

Embodiment 3

[0036] 3.1 Add 0.6583 g of MoCl 5, 0.0677 g of hydroxylamine hydrochloride, 0.0371 g of dopamine hydrochloride, and 1.5984 g of PVP were added to a mixed solvent of 1.0 mL of ethanol, 4.6 mL of DMF and 0.4 mL of 1,5-pentanediol, and stirred to obtain a spinning solution;

[0037] 3.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were as follows: positive voltage 19 KV, negative voltage 0.5 KV, receiving distance 16 cm, and syringe advancing speed 0.001 mm / s.

[0038] 3.3 Fold the precursor fiber and spread it flat in the ark, and raise the temperature from room temperature to 450 °C at a rate of 1 °C / min in the air atmosphere, and keep it warm for 1 h. After the sample is cooled with the furnace, MoO is obtained. 3 Sheet structure. MoO 3 The size of the sheet-like structure is relatively uniform and the dispersion is good, the size is 0.4-0.6 μm, and the thickness is 60-90 nm.

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Abstract

The invention discloses an electrospinning synthesis method of a MoO3 sheet structure, and the electrospinning synthesis method comprises the steps of: adding a molybdenum salt, hydroxylamine hydrochloride, dopamine hydrochloride and PVP into a mixed solvent of ethanol, DMF and 1,5-pentanediol, stirring to obtain a spinning solution, and forming precursor fiber by an electrospinning method; calcining the obtained precursor fiber to obtain a product. The method designs a novel precursor reaction system, has the advantages such as wide sources of raw materials, low price, simple operation and equipment, controllable parameters, uniform product size, good repeatability and dispersibility, and has broad application prospects in gas sensing, adsorption, and other fields.

Description

technical field [0001] The present invention relates to a kind of MoO 3 Synthetic method of sheet-like structure, specifically related to a size-tunable MoO 3 Electrospinning synthesis method of sheet-like structures. Background technique [0002] As one of the most important functional materials, MoO 3 It is an environmentally friendly n-type semiconductor material with a band gap of about 2.39-2.9 eV. Due to its special quantum size effect, surface effect and high reactivity, it is widely used in photocatalysts, gas sensors, electrochemistry, field emission and aerochromic And photochromic devices and other fields have attracted extensive attention. [0003] Adjust MoO 3 Nanostructures are essential to deliver many unique properties, such as large specific surface areas and specific size effects for various important applications. So far, MoO 3 Different nanostructures have been engineered by a variety of synthetic methods, including the synthesis of particles using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02
CPCC01G39/02C01P2002/72C01P2004/03C01P2004/61C01P2004/62
Inventor 李绘刘裕宋军超褚姝姝李行马谦
Owner UNIV OF JINAN
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