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Method for preparing starfruit-shaped SnO2/C micro-nano particles through electrostatic spinning and prepared product

A micro-nano particle and electrospinning technology, applied in tin oxide and other directions, can solve the problems of complex control factors of product microscopic morphology, and achieve the effect of narrow particle size distribution, strong controllability and strong operability

Inactive Publication Date: 2016-06-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, SnO is prepared by electrospinning at home and abroad. 2 The research on / C composites is still in its infancy, and the products mainly involve SnO with different morphologies. 2 / C composite fiber, rarely using electrospinning to synthesize SnO 2 / C micro-nanoparticle report
Moreover, the electrospinning process has high requirements on the selection of the reaction system, the setting of the spinning parameters and the heat treatment system, etc., and the control factors of the microscopic morphology of the product are relatively complicated, which still requires a lot of theoretical exploration and performance research.

Method used

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  • Method for preparing starfruit-shaped SnO2/C micro-nano particles through electrostatic spinning and prepared product
  • Method for preparing starfruit-shaped SnO2/C micro-nano particles through electrostatic spinning and prepared product
  • Method for preparing starfruit-shaped SnO2/C micro-nano particles through electrostatic spinning and prepared product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.1 Mix 1.000g of PVP, 0.250g of TBAB, 1.50mL of liquid paraffin and 0.460g of crystalline tin tetrachloride (SnCl 4 ·5H 2 O) Add to the mixed solvent of 5.0mL ethanol and 5.0mLDMF, stir to obtain a transparent solution;

[0033] 1.2 The above solution was electrospun to obtain precursor fibers. The spinning parameters were: positive voltage 20KV, negative voltage 0.5KV, receiving distance 20cm, and syringe advancing speed 0.004mm / s.

[0034]1.3 Place the precursor fibers in a tube furnace at N 2 After reaction at 500°C for 2h under protection (the heating rate is 5°C / min), the sample was cooled with the furnace to obtain the final product.

[0035] SEM of the product as figure 1 and 2 as shown, image 3 It is a physical photo of carambola, and it can be found by comparison that the product obtained in the present invention is carambola-like particles, and its thickness range is 0.60-0.70 μm, and the length range is 0.90-1.05 μm; the XRD result of the product is as...

Embodiment 2

[0037] 2.1 Mix 0.581g of PVP, 0.179g of TBAB, 1.25mL of liquid paraffin and 0.253g of SnCl 4 ·5H 2 O was added to the mixed solvent of 4.0mL ethanol and 2.5mLDMF, and stirred to obtain a transparent solution;

[0038] 2.2 The above solution was electrospun to obtain a precursor fiber. The spinning parameters were: positive voltage 16KV, negative voltage 0.5KV, receiving distance 16cm, and syringe advancing speed 0.001mm / s.

[0039] 2.3 Place the precursor fibers in a tube furnace at N 2 After being reacted at 550°C for 3h under protection (the heating rate is 5°C / min), the sample was cooled with the furnace to obtain carambola-shaped SnO with a thickness ranging from 0.90-1.10μm and a length ranging from 1.35-1.65μm. 2 / C particles.

Embodiment 3

[0041] 3.1 Mix 1.786g of PVP, 0.393g of TBAB, 1.95mL of liquid paraffin and 0.924g of SnCl 4 ·5H 2 O was added to a mixed solvent of 6.0 mL ethanol and 8.5 mL DMF, and stirred to obtain a transparent solution;

[0042] 3.2 The above solution was electrospun to obtain a precursor fiber. The spinning parameters were: positive voltage 25KV, negative voltage 0.5KV, receiving distance 25cm, and syringe advancing speed 0.002mm / s.

[0043] 3.3 Place the precursor fibers in a tube furnace at N 2 After being reacted at 600°C for 10h under protection (the heating rate is 5°C / min), the sample was cooled with the furnace to obtain carambola-like SnO with a thickness ranging from 3.10-3.40 μm and a length ranging from 4.65-5.10 μm. 2 / C particles.

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Abstract

The invention discloses a method for preparing starfruit-shaped SnO2 / C micro-nano particles through electrostatic spinning and a prepared product. The method comprises steps as follows: PVP (polyvinyl pyrrolidone), TBAB (tetrabutylammonium bromide), liquid paraffin and tin salt are dissolved in a mixed solvent of ethanol and DMF (dimethyl formamide) and stirred, and a transparent solution is obtained; the transparent solution is treated with an electrostatic spinning method, precursor fibers are obtained and calcined under the condition of inert gas protection, and the starfruit-shaped SnO2 / C micro-nano particles are obtained. The starfruit-shaped SnO2 / C micro-nano particles with adjustable sizes are prepared with the combination of a simple electrostatic spinning technology and the heat treatment process under the condition of inert gas protection, the technological process is simple, the synthesis condition is easy to control, the operability is high, the product morphology is unique, the controllability is high, the repeatability is good, the particle size distribution range is narrow, the particle sizes are adjustable, and the method is suitable for industrial production. The obtained starfruit-shaped SnO2 / C micro-nano particles have potential application value in the aspects of a supercapacitor, a lithium ion battery and the like.

Description

technical field [0001] The invention relates to a carambola-like SnO 2 / C preparation method of micro-nanoparticles, specifically related to a size-tunable carambola-like SnO 2 The preparation method and the obtained product of / C micro-nano particle. Background technique [0002] SnO 2 It is an important class of oxide semiconductor materials, showing broad application prospects in many fields. By regulating SnO 2 The microscopic morphology, size distribution and crystal plane anisotropy, etc., show unique physical and chemical properties in gas-sensing properties, dye-sensitized solar cells, catalyst supports, lithium-ion batteries, supercapacitors, etc. [0003] In the field of cathode materials for lithium-ion batteries, SnO 2 Has a higher theoretical capacity than carbon materials (such as graphene) (781mAhg -1 ), due to its poor conductivity and pulverization during charge-discharge cycles, SnO 2 The fast loss of reversible capacitance is very pronounced, greatl...

Claims

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Application Information

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IPC IPC(8): C01G19/02
CPCC01G19/02C01P2002/72C01P2002/82C01P2004/03C01P2004/04C01P2004/30C01P2004/50C01P2004/61
Inventor 马谦陈迎章展铭刘飞吴福硕杨萍
Owner UNIV OF JINAN
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