Method for rapidly preparing carbon-coated nano TinO2n-1@C nano powder

A technology of titanium oxide and nano-powder, which is applied in the field of rapid preparation of carbon-coated nano-titanium oxide nano-powder, can solve the problems of inability to prepare titanium oxide powder and large particle size of titanium oxide powder, and achieve Short preparation cycle and the effect of inhibiting sintering and agglomeration

Pending Publication Date: 2019-08-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of titanium oxide powder prepared by this method is relatively large, and carbon-coated titanium oxide powder cannot be prepared

Method used

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  • Method for rapidly preparing carbon-coated nano TinO2n-1@C nano powder
  • Method for rapidly preparing carbon-coated nano TinO2n-1@C nano powder
  • Method for rapidly preparing carbon-coated nano TinO2n-1@C nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix commercial P25 powder and polyvinyl alcohol powder at a mass ratio of 2:1, and dry the mixed material (P25+PVA) in a drying oven at 80°C overnight for use.

[0025] Vacuumize the rapid heat treatment furnace and fill it with argon as a protective gas. After raising the furnace temperature to the target temperature of 1300°C, use argon as the carrier gas and send the mixed material into the rapid heat treatment process at a flow rate of 0.5 L / min. The high-temperature heating zone of the furnace; the material reacts rapidly under the drive of argon and falls into the powder cooling collection device, that is, carbon-coated titanium dioxide nanopowder (Ti n o 2n-1 @C).

[0026] The product phase obtained in this embodiment is Ti 4 o 7 , Ti 3 o 5 , Ti 2 o 3 And with Ti 4 o 7 Based on TEM photo analysis, the particle size is about 100nm, and the thickness of the carbon shell is 4nm. The product phase results are as follows figure 1 shown in S1300, and summari...

Embodiment 2

[0028] Mix rutile metatitanic acid powder and polyvinyl alcohol powder at a mass ratio of 1:1, and dry the mixed material (rutile metatitanic acid + PVA) in a drying oven at 80°C overnight for use.

[0029] Vacuumize the rapid heat treatment furnace and fill it with nitrogen as a protective gas. After raising the furnace temperature to the target temperature of 1400°C, use nitrogen as the carrier gas and send the mixed material into the rapid heat treatment furnace at an air flow rate of 2L / min. The high-temperature heating zone; the material reacts rapidly under the drive of argon and falls into the powder cooling collection device, that is, carbon-coated titanium dioxide nanopowder (Ti n o 2n-1 @C).

[0030] The product phase obtained in this embodiment is Ti 3 o 5 , Ti 2 o 3 , the particle size is about 100 nm and the carbon shell thickness is 6 nm through TEM photo analysis; the product phase results are as follows figure 1 S1400 is shown and summarized in Table 1, ...

Embodiment 3

[0032] Mix rutile metatitanic acid powder and polyvinyl alcohol powder at a mass ratio of 1:2, and dry the mixed material (rutile metatitanic acid + PVA) in a drying oven at 80°C overnight for use.

[0033] Vacuumize the rapid heat treatment furnace and fill it with argon as a protective gas. After raising the furnace temperature to the target temperature of 1500°C, use argon as the carrier gas and send the mixed material into the rapid heat treatment furnace at a flow rate of 5L / min. The high-temperature heating zone; the material reacts rapidly under the drive of argon and falls into the powder cooling collection device, that is, carbon-coated titanium dioxide nanopowder (Ti n o 2n-1 @C).

[0034] The product obtained in this embodiment is analyzed by XRD, and the phase is Ti 2 o 3 , the particle size is about 110nm and the carbon shell thickness is 11nm through TEM photo analysis; the product phase results are as follows figure 1 S1500 is shown and summarized in Table ...

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Abstract

The invention discloses a method for rapidly preparing carbon-coated nano TinO2n-1@C nano powder, and belongs to the technical field of powder material preparation. The method of the invention includes the steps of using a mixture of metatitanic acid or titanium dioxide and polyvinyl alcohol as raw materials, and using argon gas or nitrogen gas as carrier gas to be transported to a rapid heat treatment furnace at a gas flow rate of 0.5 L / min to 5 L / min; enabling the material to react at a high temperature reaction region and then to settle at a condensation region during the falling process inthe furnace, and then obtaining the carbon-coated nano TinO2n-1@C (n is an integer from 2 to 9) powder at a collection region, wherein the morphology is spherical or ellipsoidal; by adoption of the method, rapid preparation and short process of carbon-coated TinO2n-1@C can be realized.

Description

technical field [0001] The invention provides a method for rapidly preparing carbon-coated nano-titanium oxide nano-powder, which belongs to the field of powder material preparation. Background technique [0002] Titanium oxide powder material is the world's first black titanium metal oxide, Magneli phase titanium oxide (Ti n o 2n-1 , 3<n<10) is one of the more studied titanium oxides. Although as early as 60 years ago, the material of Magneli phase titanium oxide has been widely concerned and studied, but the enthusiasm of scholars for the preparation and application of this material has only increased. Magneli phase titania possesses superconductivity, outstanding stability and excellent corrosion resistance, and excellent photocatalytic activity. This makes the Magneli phase titanous oxide widely used in many fields, such as the field of fuel cells, lithium-sulfur batteries, lithium-air batteries, anodic oxidation treatment of wastewater, and photocatalytic degra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04C01B32/15B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/15C01G23/043C01P2002/80C01P2004/04C01P2004/64C01P2004/80
Inventor 徐宝强赵顶杨斌杨佳刘明辉翟蔚然吴鉴田阳王飞刘大春熊恒李一夫蒋文龙曲涛郁青春戴永年孔令鑫孔祥峰
Owner KUNMING UNIV OF SCI & TECH
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