Preparation method for ferric oxide coated tin dioxide nanometer polycrystalline microballoon

A technology of ferric oxide and tin dioxide, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of low yield, complicated conditions, and high cost, and achieve high yield, uniform size and shape, and synthetic The effect of simple method

Inactive Publication Date: 2011-11-16
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it is prepared by chemical vapor deposition epitaxial growth method, the conditions are relatively complicated, the yield is low, the cost is high, and it is not conducive to large-scale production.
However, using simple hydrothermal method, using cheap sucrose, ferric chloride, tin tetrachloride, etc. as raw materials, a large number of ferrous oxide-coated tin dioxide nano-polycrystalline microspheres with relatively uniform size and shape are synthesized. The preparation method has not yet been reported at home and abroad

Method used

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  • Preparation method for ferric oxide coated tin dioxide nanometer polycrystalline microballoon
  • Preparation method for ferric oxide coated tin dioxide nanometer polycrystalline microballoon
  • Preparation method for ferric oxide coated tin dioxide nanometer polycrystalline microballoon

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Embodiment 1

[0020] Preparation of tin dioxide and polysaccharide spheres

[0021] First weigh 7.3g of SnCl 4 ·5H 2 Dissolve O in 20mL of distilled water, then weigh 7.15g of sucrose as a template and dissolve in 15mL of distilled water, mix the two solutions evenly and put them into a 45ml hydrothermal kettle, then put the reaction kettle into a blast drying oven heated to 180°C 24h in the box for hydrothermal reaction. After the reaction was completed, the hydrothermal kettle was taken out, and after it was cooled to room temperature, the sample was washed by ultrasonic centrifugation to obtain a brown powdery solid, which was sintered in air at 600°C to obtain tin dioxide nano-polycrystalline microspheres, which Scanning electron microscope photos as figure 2 .

Embodiment 2

[0023] Coating ferric oxide on the basis of tin dioxide and polysaccharide spheres

[0024] First weigh 0.72g of FeCl 3 6H 2 O was dissolved in 30mL of ethanol and stirred for 30 minutes, then 0.81g of urea was weighed and dissolved in 6ml of deionized water and stirred for 30 minutes. After the stirring was completed, 150g of tin dioxide, polysaccharide spheres and FeCl 3 ·6H 2 O solution and urea solution were mixed together, stirred for 15 minutes, and then the mixed liquid was subjected to ultrasonic vibration for 15 minutes. Finally, the mixed liquid was put into a 45ml hydrothermal kettle, and heated to 60° C. in a blast drying oven for 48 hours of hydrothermal reaction.

Embodiment 3

[0026] Sintered

[0027] After the hydrothermal reaction is completed, put the brown powdery solid into the muffle furnace and sinter in the air at 500°C for 4 hours. The carbon and the oxygen in the air react to generate carbon dioxide gas, and finally the red ferric oxide coated carbon dioxide is obtained. Tin nano polycrystalline microsphere solid powder. The X-ray diffraction spectrogram of gained ferric oxide coating tin dioxide nano-polycrystalline microsphere is as follows figure 1 , and its scanning electron micrograph is shown in image 3 . Gained solid powder was ultrasonicated for 30 minutes, and its scanning electron micrograph was as follows: Figure 4 , it can be seen that the ferric oxide on the surface of some microspheres falls off, exposing the tin dioxide microspheres inside.

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Abstract

The invention relates to a preparation method for ferric oxide coated tin dioxide nanometer polycrystalline microballoons, and belongs to the technical field of preparation of new energy materials of inorganic compounds. The ferric oxide coated tin dioxide nanometer polycrystalline microballoons are prepared by the hydrothermal method with cane sugar, urea, tin tetrachloride and ferric trichloride as raw materials. The method comprises the following steps: dissolving tin tetrachloride in water, adding cane sugar, carrying out stirring for 0.5 hour at room temperature, putting the obtained solution into a hydro-thermal vessel with a volume of 45 ml, heating the solution to a temperature of 180 DEG C for a hydro-thermal reaction for 24 hours, carrying out centrifugal separation when the reaction is finished, and carrying out rinsing with considerable deionized water so as to obtain black powder; dissolving ferric trichloride and urea in a mixed solution of ethanol and water, adding the black powder into the solution, carrying out stirring and ultrasonic treatment, putting the obtained liquid into the hydro-thermal vessel with a volume of 45 ml, and heating the liquid to a temperature of 60 DEG C for a hydro-thermal reaction for 48 hours; carrying out centrifugal separation when the reaction is finished, and carrying out rinsing with considerable deionized water and sintering at a temperature of 500 DEG C in air for 4 hours so as to obtain red ferric oxide coated tin dioxide nanometer polycrystalline microballoons. The invention has the advantages of simple operation, cheap raw materials, environmental protection, high yield, etc.

Description

technical field [0001] The invention relates to a preparation method of ferric oxide-coated tin dioxide nano-polycrystalline microspheres, which are anode materials for lithium-ion batteries, in particular to the preparation of ferric oxide by using sucrose, tin tetrachloride and ferric chloride by a hydrothermal method. A method for iron coating tin dioxide nano polycrystalline microspheres. It belongs to the technical field of preparation of inorganic compound new energy materials. Background technique [0002] Due to the particularity of its structure, such as large specific surface and a series of new effects (small size effect, interface effect, quantum effect and quantum tunneling effect, etc.), nanomaterials have unique physical and chemical properties, which have attracted people's attention. highly valued. Tin dioxide can form up to Li 22 sn 4 Tin-based alloy with a theoretical capacity of 782mAh / g, so tin dioxide is considered to be one of the most promising ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 郭林霍鹏云
Owner BEIHANG UNIV
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