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A kind of sno prepared by self-combustion method of sol vapor 2 - Method of amorphous carbon nanocomposite pellets

A nanocomposite and self-combustion technology, applied in the field of nanomaterials, can solve the problems of cumbersome steps, strict preparation process, and production cost of a large amount of waste liquid, and achieve the effect of no waste liquid generation and simple preparation process.

Inactive Publication Date: 2020-11-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method overcomes the traditional SnO 2 - The preparation process of amorphous carbon nanocomposite pellets is harsh, cumbersome steps, need ball forming agent, easy to introduce impurities, produce a large amount of waste liquid and high production cost, and has the advantages of simple, fast, continuous preparation process and no waste liquid generation and other advantages, for the low-cost preparation of SnO 2 - Amorphous carbon nanocomposite spheres provide a new approach

Method used

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  • A kind of sno prepared by self-combustion method of sol vapor <sub>2</sub> - Method of amorphous carbon nanocomposite pellets
  • A kind of sno prepared by self-combustion method of sol vapor <sub>2</sub> - Method of amorphous carbon nanocomposite pellets
  • A kind of sno prepared by self-combustion method of sol vapor <sub>2</sub> - Method of amorphous carbon nanocomposite pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0025] Example 1-1, SnO 2 - Preparation of amorphous carbon nanocomposite spheres.

[0026] A. Preparation of precursor sol: Add tin tetrachloride (1g) to 20-25g ethanol and stir for 2-6 hours to obtain 21-26g SnO 2 Alcohol sol; add 2-3g glucose to the obtained sol and stir to dissolve evenly.

[0027] B. SnO 2 - Preparation of amorphous carbon nanocomposite pellets: use an ultrasonic nebulizer to atomize the composite sol, introduce air with a flow rate of 0.6L / min, and introduce the composite precursor aerosol into a quartz tube with a spherical combustion chamber; Use a fiber laser with a fixed wavelength of 1060nm, and set the laser output power to 300W. Using ethanol’s strong absorption of infrared rays, ignite the sol vapor, and the heat generated by the combustion promotes the cracking and conversion of the precursor, converting the organic carbon source into Amorphous carbon, SnO 2 Conversion of Alcohol Sols to Nanoscale SnO 2 Particles; the nanoparticles are coll...

Embodiment 1-2

[0029] Example 1-2, SnO 2 / Preparation of amorphous carbon nanocomposite pellets.

[0030] A. Preparation of precursor sol: Add tin tetrachloride (1g) to 20-25g ethanol and stir for 2-6 hours to obtain 21-26g SnO 2 Alcohol sol; add 2-3g glucose to the obtained sol and stir to dissolve evenly.

[0031] B. SnO 2 -Preparation of amorphous carbon nanocomposite pellets: atomize the composite sol with an ultrasonic nebulizer, introduce air with a flow rate of 0.2L / min, and introduce the composite precursor aerosol into a quartz tube with a spherical combustion chamber; Use a fiber laser with a fixed wavelength of 1060nm, and set the laser output power to 300W. Using ethanol’s strong absorption of infrared rays, ignite the sol vapor, and the heat generated by the combustion promotes the cracking and conversion of the precursor, converting the organic carbon source into Amorphous carbon, SnO 2 Conversion of Alcohol Sols to Nanoscale SnO 2 Particles; the nanoparticles are collect...

Embodiment 2

[0033] Embodiment 2, with the SnO that embodiment 1 makes 2 / Amorphous carbon nanocomposite pellets, Super P carbon black and PVDF are mixed in a ratio of 75:15:10wt.%, mixed with NMP solvent to form a paste, and coated on the surface of copper foil. After vacuum drying, the coated copper foil was cut into discs with a diameter of 15 mm as electrodes for sodium ion batteries, and the electrolyte for sodium ion batteries (EC:PC=1:1, NaClO 4 The concentration is 1mol / L) and metal sodium foil as the counter electrode, assembled into an RC2032 button battery in an argon protective glove box, and carried out constant current charge and discharge tests in the Neware BTS battery test system. The test parameters are: the charge and discharge rate is 20mA / g, the charge and discharge potential is from 0.05-3V, and the cycle is performed 50 times. Combined with the specific capacity-cycle number map of the battery, it is known that ( Figure 5 ), the SnO prepared by Example 1-1 2 / Am...

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Abstract

The invention discloses a method of preparing SnO2-amorphous carbon nano composite spheres by means of sol-vapor auto-combustion. A mixed sol of SnO2 alcosol and an organic carbon source is used as aprecursor that is converted into combustible precursor aerosol by an ultrasonic atomizer; the combustible precursor aerosol is mixed with air in a certain ratio; the resulting aerosol is introduced into a hollow quartz glass tube having a combustor; under controlled process parameters, the precursor aerosol is ignited via laser to combust and split for conversion, and the SnO2-amorphous carbon nano composite spheres are prepared. The defect that the traditional preparation processes of SnO2-amorphous carbon nano composite spheres have strict process, complex steps, the need for a sphere-forming agent, proneness to impurity inclusion, high yield of wastewater and high production cost is overcome. The method herein has the advantages of simple process, high speed, continuity, zero wastewaterand the like and acts as a novel method to prepare SnO2-amorphous carbon nano composite spheres at low cost.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a method for preparing SnO by using a sol vapor self-combustion method 2 - Method of amorphous carbon nanospheres. Background technique [0002] As a functional material with good performance and low price, SnO 2 Nanocomposite materials have good application value and prospects in sensor devices, semiconductor devices, energy storage and other fields. while SnO 2 -Amorphous carbon nanospheres have important uses in the field of electrochemical sodium storage because of their stable spatial structure, moderate specific surface area and good electrochemical kinetic performance. Traditionally used to prepare SnO 2 - The methods of amorphous carbon nanospheres are mainly through methods such as spray drying, ball milling, and hydrothermal synthesis. The preparation cost of the first two methods is relatively low, but there are disadvantages such as relatively strict process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/05C01G19/02C01P2004/03C01P2004/04C01P2004/32C01P2004/64C01P2004/80
Inventor 陆潇晓童林聪刘孝谦鲍亮陈逸凡杨涛熊琴琴季振国
Owner HANGZHOU DIANZI UNIV