Method for preparing nano titanium sub-oxide by utilizing high-temperature plasma

A high-temperature plasma, titanium oxide technology, applied in the direction of titanium oxide/hydroxide, nanotechnology, low-value titanium oxide, etc., can solve the problem of long preparation time, and achieve the effect of controllable process and short process.

Active Publication Date: 2017-12-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can prepare single-phase or titanium dioxide powder with a purity higher than 70%, but the preparation time is longer

Method used

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  • Method for preparing nano titanium sub-oxide by utilizing high-temperature plasma
  • Method for preparing nano titanium sub-oxide by utilizing high-temperature plasma
  • Method for preparing nano titanium sub-oxide by utilizing high-temperature plasma

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Effect test

Embodiment 1

[0020] Embodiment 1: The method for preparing nano-titanium suboxide by this high-temperature plasma, the specific operations are as follows:

[0021] Using argon as the carrier gas with a flow rate of 3.12L / min, transport 15g of nano-scale rutile-type metatitanic acid powder into the plasma reaction device, and turn on the argon excitation gas source to excite high-temperature plasma, metatitanic acid powder After passing through the plasma high-temperature flame area within 1 second, the powder enters the powder condensation collection system driven by the airflow, and quickly obtains titanium dioxide powder with a particle size of 50-100nm. Using the same method, the carrier gas is exchanged For different proportions of argon and hydrogen, titanium dioxide powders with different colors are obtained. The color of the sample and the corresponding phase are as follows figure 1 As shown, with the increase of the hydrogen content in the carrier gas, the Ti n o 2n-1 The smaller...

Embodiment 2

[0022] Embodiment 2: The method for preparing nano-titanium suboxide by this high-temperature plasma, the specific operations are as follows:

[0023] Use a carrier gas with a volume flow ratio of hydrogen and argon of 1:1 and a flow rate of 6L / min to transport 20g of anatase nanoscale metatitanic acid into the plasma reaction device, and turn on the argon excitation gas source to excite high-temperature plasma , after the metatitanic acid powder passes through the plasma high-temperature flame area within 1 second, it enters the powder condensation collection system under the drive of the airflow, and quickly obtains dark blue spherical Ti 4 o 7 Powder, its particle size is 50~100nm, its appearance is as figure 2 shown.

Embodiment 3

[0024] Embodiment 3: The method for preparing nano-titanium suboxide by this high-temperature plasma, the specific operation is as follows:

[0025] Graphite tubes are used as the lining around the high-temperature plasma flame area in the high-temperature plasma generation system, and the mixed gas of hydrogen and argon with a volume flow ratio of 1:2 is used as the carrier gas, and 20g of rutile nanoscale is used at a flow rate of 4L / min. The metatitanic acid is delivered to the plasma reaction device, and the helium excitation gas source is turned on to excite the high-temperature plasma. After the metatitanic acid powder passes through the plasma high-temperature flame area within 1 second, it enters the powder to condense and collect under the drive of the airflow. system, quickly obtain carbon-coated spherical Ti 4 o 7 Powder, its particle size is 50~80nm, its appearance is as image 3 shown.

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Abstract

The invention discloses a method for preparing nano titanium sub-oxide by utilizing high-temperature plasma. The method comprises the following steps: firstly, conveying a nanoscale metatitanic acid powder body into a plasma reaction device by using carrier gas, wherein the plasma reaction device comprises a high-temperature plasma generation system and a power body condensation and collection system; enabling the metatitanic acid powder body to pass through a high-temperature plasma flame area of the high-temperature plasma generation system within 1 second; then enabling the metatitanic acid powder body to enter the power body condensation and collection system, and carrying out condensing settlement to finally obtain a titanium sub-oxide powder body of which the particle size is nanoscale. A preparation process of the method disclosed by the invention is simple and feasible, is less in time consumption, is high in efficiency, and has a wider application prospect.

Description

technical field [0001] The invention relates to a method for preparing nano-titanium suboxide by high-temperature plasma, which belongs to the field of powder material preparation. Background technique [0002] Titanium oxide is an important titanium oxide material, its molecular formula is Ti n o 2n-1 , n is an integer greater than zero, and the Magneli phase titanium oxide is one of the titanium oxide materials. Titanium oxide compounds have high electrical conductivity, high chemical stability, and good light absorption ability in the visible light region or ultraviolet light region, which makes them excellent electrodes for electrochemical applications on the one hand. On the other hand, it is also a very promising material for improving light absorption performance and photoelectrochemical performance. [0003] A large number of studies have shown that titanium dioxide nanoparticles can decompose gaseous formaldehyde under the condition of light at room temperature, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04B82Y40/00
CPCB82Y40/00C01G23/043C01P2004/03C01P2004/04C01P2004/64
Inventor 徐宝强杨斌赵顶熊恒邓勇杨佳刘大春马文会郁青春李一夫曲涛田阳蒋文龙戴永年
Owner KUNMING UNIV OF SCI & TECH
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