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Method for synthesizing groove-shaped MoO3 and product thereof

A synthesis method and gully technology, applied in the field of functional new material preparation, can solve problems such as difficult to grasp the technical route, and achieve the effects of controllable microstructure size, low cost, and special microscopic morphology

Active Publication Date: 2018-12-07
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no gully-like MoO has been prepared by electrospinning. 3 Material reports, technical routes are difficult to grasp

Method used

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  • Method for synthesizing groove-shaped MoO3 and product thereof
  • Method for synthesizing groove-shaped MoO3 and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) A mixed solvent of 1.0 mL ethanol, 4.0 mL DMF and 1.0 mL triethylamine was prepared, and 0.4937 g of molybdenum pentachloride (MoCl 5 ), 0.0298 g 2-methylimidazole, 0.0046 g dicyandiamide, and 0.999 g PVP were sequentially added to the above mixed solvent, and stirred to obtain a spinning solution;

[0026] (2) The spinning solution was electrospun into precursor fibers. The spinning parameters were as follows: positive voltage 17 KV, negative voltage 0.5 KV, receiving distance 18 cm, and syringe advancing speed 0.001 mm / s;

[0027] (3) The precursor fiber was calcined in a muffle furnace, and the temperature was raised from room temperature to 600 °C at a rate of 1 °C / min, and kept for 3 h. After the sample was cooled with the furnace, a ravine-shaped MoO was obtained. 3 Material;

[0028] The XRD of the product in embodiment 1 is as figure 1 It can be seen from the figure that the intensity of the diffraction peak is higher, the crystallinity of the product is b...

Embodiment 2

[0030] (1) Prepare a mixed solvent of 1.0 mL of ethanol, 4.0 mL of DMF and 1 mL of triethylamine, and mix 0.3292 g of MoCl 5 , 0.0149 g 2-methylimidazole, 0.0025 g dicyandiamide, and 0.5994 g PVP were sequentially added to the above-mentioned mixed solvent, and stirred to obtain a spinning solution;

[0031] (2) The spinning solution was electrospun into precursor fibers, and the spinning parameters were: positive voltage 16 KV, negative voltage 0.5 KV, receiving distance 17 cm, and syringe advancing speed 0.001 mm / s;

[0032] (3) The precursor fiber was calcined in a muffle furnace, and the temperature was raised from room temperature to 550 °C at a rate of 1 °C / min, and kept for 2 h. After the sample was cooled with the furnace, a gully-shaped MoO was obtained. 3 material, with a diameter of 0.8-1.8 μm, a groove width of 40-120 nm, and a groove depth of 20-70 nm.

Embodiment 3

[0034] (1) Prepare a mixed solvent of 1.0 mL ethanol, 4.0 mL DMF and 1.0 mL triethylamine, and mix 0.6583 g of MoCl 5 , 0.0498 g 2-methylimidazole, 0.0071 g dicyandiamide, and 1.4652 g PVP were sequentially added to the above-mentioned mixed solvent, and stirred to obtain a spinning solution;

[0035] (2) The spinning solution was electrospun into precursor fibers. The spinning parameters were as follows: positive voltage 18 KV, negative voltage 0.5 KV, receiving distance 19 cm, and syringe advancing speed 0.002 mm / s;

[0036] (3) The precursor fiber was calcined in a muffle furnace, and the temperature was raised from room temperature to 650 °C at a rate of 1 °C / min, and kept for 4 h. After the sample was cooled with the furnace, a ravine-shaped MoO was obtained. 3 material with a diameter of 1.5-3.5 μm, a groove width of 80-220 nm, and a groove depth of 40-120 nm.

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Abstract

The invention provides a method for synthesizing a groove-shaped MoO3 material. The method comprises the following steps: sequentially adding a molybdenum salt, 2-methylimidazole, dicyandiamide and PVP (Polyvinyl Pyrrolidone) into a mixed solvent of ethanol, DMF (Dimethyl Formamide) and triethylamine, and stirring to obtain a spinning solution; preparing precursor fibers by adopting electrostaticspinning; and finally, calcining the obtained precursor fibers under air conditions at a high temperature, thereby obtaining the product. The reasonable precursor spinning solution system and electrostatic spinning parameters are designed, and the obtained product is special in micro topography, excellent in repeatability and high in purity. Moreover, the preparation process is simple and convenient, actual production is facilitated, and the product has excellent application prospects in the fields such as catalysis, adsorption, gas sensitization and the like.

Description

technical field [0001] The invention belongs to the field of functional new material preparation and relates to a kind of MoO 3 The synthesis method of the material, specifically relates to an electrospinning method to prepare gully-shaped MoO 3 Synthetic methods and products thereof. The invention belongs to the field of functional new material preparation and relates to a kind of MoO 3 The synthesis method of the material, specifically relates to an electrospinning method to prepare gully-shaped MoO 3 Synthetic methods and products thereof. Background technique [0002] Molybdenum trioxide (MoO 3 ) is a wide bandgap (2.8–3.6 eV) semiconductor with three distinct crystal structures namely thermodynamically stable orthorhombic MoO 3 (α-MoO 3 ), metastable monoclinic MoO 3 (β-MoO 3 ) and hexagonal MoO 3 (h-MoO 3 ). Due to the specific structural anisotropy and variable oxidation state, α-MoO 3 It has potential applications in the fields of rechargeable lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08
CPCD01F9/08
Inventor 李绘褚姝姝马谦李行方圆王懿林紫琼张琪杨萍
Owner UNIV OF JINAN
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