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Preparation method of carbon-coated anatase titanium dioxide nano composite powder

A nano-composite powder, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of long preparation cycle, high temperature, complicated operation, etc. The effect of less impurities and low energy consumption

Inactive Publication Date: 2014-01-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high temperature and relatively complex operation, and at 600°C and above, the obtained titanium oxide has a rutile structure, and the preparation cycle is long

Method used

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  • Preparation method of carbon-coated anatase titanium dioxide nano composite powder
  • Preparation method of carbon-coated anatase titanium dioxide nano composite powder

Examples

Experimental program
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Effect test

example 1

[0013] Put 1 g of commercially available P25 nanopowder (produced by Dalian Qiseguang Solar Energy Technology Development Co., Ltd.) in a tube furnace, under the protection of 100 mL / min of argon, the temperature was raised to 450 °C at a rate of 10 °C / min, and 100 mL / min In a hydrogen atmosphere, keep it warm for 30min, then raise the temperature to 480℃ at a rate of 10℃ / min, and then pass 10mL / min of C 2 h 2 React with a mixed gas of 200mL / min Ar for 30min to obtain a carbon-coated anatase nano-titanium dioxide composite powder.

example 2

[0015] Put 1.5 g of commercially available P25 nanopowder (produced by Dalian Qiseguang Solar Energy Technology Development Co., Ltd.) into a tube furnace, and under the protection of 200 mL / min of argon, the temperature was raised to 400 °C at a rate of 8 °C / min. / min in a hydrogen atmosphere for 30 minutes, then raise the temperature to 500°C at a rate of 8°C / min, and then feed in C with a flow rate of 20mL / min. 2 h 2 React with a mixed gas of 200mL / min Ar for 30min to obtain a carbon-coated anatase nano-titanium dioxide composite powder.

example 3

[0017] Put 2 g of commercially available P25 nanopowder (produced by Dalian Qiseguang Solar Energy Technology Development Co., Ltd.) into a tube furnace, and under the protection of 50 mL / min argon, the temperature was raised to 450 °C at a rate of 10 °C / min. Min hydrogen and 100mL / min argon in a mixed atmosphere for 30min, then the temperature was raised to 490°C at a rate of 5°C / min, and then 5mL / min of C 2 h 2 React with 100mL / min Ar mixed gas for 20min to obtain carbon-coated anatase nano-titanium dioxide composite powder.

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Abstract

The invention discloses a preparation method of carbon-coated anatase titanium dioxide nano composite powder, comprising the following steps: adding commercial titanium dioxide powder in a quartz tubular furnace, under the protection of argon, heating up to 200-450 DEG C with a certain heating rate, then preserving the heat under the atmosphere of hydrogen or a mixed atmosphere of hydrogen and argon, and then heating up to 460-500 DEG C, then letting in a mixed gas of C2H2 / Ar or C2H2 / Ar / H2 in the tubular furnace tubular furnace according to a certain proportion to react to obtain the carbon-coated anatase titanium dioxide nano composite powder. The method of the present invention has the advantages of simple and practical operation, low energy consumption, short preparation cycle, and easy industrialized production, and the prepared carbon-coated anatase titanium dioxide nano composite powder has high yield and little impurity.

Description

technical field [0001] The invention relates to a preparation method of carbon-coated anatase titanium dioxide nanocomposite powder, which belongs to the technical field of carbon / titanium dioxide composite materials. Background technique [0002] As people pay more attention to refractory pollutants in the environment, semiconductor photocatalysis technology has been extensively studied. Semiconductor photocatalysis technology uses ultraviolet light to irradiate semiconductor materials to generate exciton pairs (electron-hole pairs) in the semiconductor. At the same time, the surface reaction of the semiconductor will also produce strong oxidation such as hydroxyl radicals ( OH) and superoxide anions ( ). Active substances can oxidize organic pollutants and make them completely mineralized. [0003] Titanium dioxide TiO 2 As a wide-bandgap semiconductor, its bandgap is 3.2eV. Due to its stable chemical properties, low price, and non-toxicity, it is currently a semicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J21/06
Inventor 赵乃勤沙军威刘恩佐师春生何春年李家俊
Owner TIANJIN UNIV