Electrostatic spinning synthesis method for Alpha-Fe2O3 rod-shaped structure

A technology of electrospinning and synthesis method, which is applied in the field of electrospinning synthesis of α-Fe2O3 rod structure, which can solve the problems of time-consuming, low efficiency, and complicated microwave process, and achieve good technological innovation effects

Active Publication Date: 2019-01-11
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sol-gel method is time-consuming and inefficient, while the microwave method is complex and needs to heat a fluorine-containing autoclave during the production process, resulting in poor stability and repeatability of the product.
In comparison, electrospinning is a simple and convenient preparation method, but there are few reports on the use of electrospinning to obtain uniform rod-like structures.

Method used

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  • Electrostatic spinning synthesis method for Alpha-Fe2O3 rod-shaped structure
  • Electrostatic spinning synthesis method for Alpha-Fe2O3 rod-shaped structure
  • Electrostatic spinning synthesis method for Alpha-Fe2O3 rod-shaped structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1.1 First, configure L-lysine aqueous solution, dissolve 0.0060 g of L-lysine in 1.0 mL of water; secondly, mix 1.0 mL of ethanol and 4.0 mL of DMF, and dissolve 0.3344 g of anhydrous ferric chloride (FeCl 3 ), 0.078 g of polyether F127, and 0.0138 g of acetylcholine bromide were sequentially added to the mixture, stirred evenly, then the above-mentioned L-lysine aqueous solution was added, and finally 1.1100 g of PVP was added to obtain a spinning solution;

[0028] 1.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were: positive voltage 18 KV, negative voltage 0.5 KV, receiving distance 18 cm, and syringe advancing speed 0.001 mm / s.

[0029] 1.3 Place the precursor fiber in a quartz boat, then raise the temperature from room temperature to 600 °C at a rate of 1 °C / min in an air atmosphere, keep it warm for 3 h, and obtain the product after the sample is cooled with the furnace.

[0030] The XRD result of the product i...

Embodiment 2

[0032] 2.1 First, prepare L-lysine aqueous solution, dissolve 0.0018 g of L-lysine in 0.35 mL of water; secondly, mix 1.0 mL of ethanol and 3.0 mL of DMF, and dissolve 0.2006 g of FeCl 3 , 0.0312 g of polyether F127, and 0.0055 g of acetylcholine bromide were sequentially added to the mixture, stirred evenly, then the above-mentioned L-lysine aqueous solution was added, and finally 0.5328 g of PVP was added to obtain a spinning solution;

[0033] 2.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were: positive voltage 20 KV, negative voltage 0.5 KV, receiving distance 20 cm, and syringe advancing speed 0.002 mm / s.

[0034] 2.3 Place the precursor fiber in a quartz boat, then raise the temperature from room temperature to 700 °C at a rate of 1 °C / min in an air atmosphere, and keep it warm for 5 h. After the sample is cooled with the furnace, α-Fe is obtained. 2 o 3 Rod structure. α-Fe 2 o 3 The rod-like structure is relative...

Embodiment 3

[0036] 3.1 First, prepare L-lysine aqueous solution, dissolve 0.0112 g of L-lysine in 2 mL of water; secondly, mix 1.0 mL of ethanol and 5.0 mL of DMF, and dissolve 0.5016 g of FeCl 3 , 0.1365 g of polyether F127, and 0.0242 g of acetylcholine bromide were sequentially added to the mixture, stirred evenly, then the above-mentioned L-lysine aqueous solution was added, and finally 1.8315 g of PVP was added to obtain a spinning solution;

[0037] 3.2 The above spinning solution was electrospun to obtain precursor fibers. The spinning parameters were: positive voltage 17 KV, negative voltage 0.5 KV, receiving distance 17 cm, and syringe advancing speed 0.001 mm / s.

[0038] 3.3 Place the precursor fiber in a quartz boat, then raise the temperature from room temperature to 550 °C at a rate of 1 °C / min in an air atmosphere, and keep it warm for 2 h. After the sample is cooled with the furnace, α-Fe is obtained. 2 o 3 Rod structure. α-Fe 2 o 3 The rod-like structure is relatively ...

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Abstract

The invention discloses an electrostatic spinning synthesis method for an Alpha-Fe2O3 rod-shaped structure. The method comprises the following steps: mixing ethanol and DMF (Dimethyl Formamide), adding trivalent ferric salt, polyether F127 and pragmoline into a mixture, stirring for dissolving the raw materials, then adding an L-lysine aqueous solution and PVP, and uniformly stirring the raw materials, thereby obtaining a spinning fluid; preparing the spinning fluid into precursor fibers by virtue of an electrostatic spinning method, and calcining the precursor fibers, thereby obtaining a product. By virtue of designing a precursor reaction system and regulating and controlling the calcining system, an Alpha-Fe2O3 rod-shaped structure with adjustable length-diameter ratio is obtained; themethod is simple in preparation process and easy to regulate and control, adopted raw materials are extensive in source and low in price, the product is unform in microcosmic appearance and good in repetitiveness, and has extensive application prospects in the field of gas sensing, catalysis and the like.

Description

technical field [0001] The present invention relates to a kind of α-Fe 2 o 3 Synthetic method of rod-like structure, specifically related to a kind of α-Fe with adjustable aspect ratio 2 o 3 Electrospinning synthesis method of rod-like structures. Background technique [0002] One-dimensional (1D) nanostructures have attracted considerable attention due to their novel magnetic properties, which are strongly dependent on the size and shape of the nanorods. As a multifunctional nanostructured material, compared with other iron oxides, weakly ferromagnetic α-Fe 2 o 3 (Hematite) has received particular attention and has been widely used in various applications including photocatalysis, gas sensing, drug delivery, tissue repair engineering, magnetic resonance imaging, lithium-ion batteries, etc. [0003] Sol-gel processing, microemulsions, forced hydrolysis, hydrothermal synthesis, and chemical precipitation have long been used to prepare α-Fe 2 o 3 nanoparticles. For ex...

Claims

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Application Information

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IPC IPC(8): D01F9/08
CPCD01F9/08
Inventor 李绘刘裕宋军超褚姝姝李行马谦
Owner UNIV OF JINAN
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