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A kind of method that gas-liquid plasma prepares anatase tio2 at low temperature

A plasma and anatase technology, which is applied in chemical instruments and methods, titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems such as the large influence of plasma discharge properties, and achieves easy availability of raw materials, simple preparation process, and easy preparation. short time effect

Active Publication Date: 2015-12-02
西安前沿材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the gas phase method, the liquid phase medium has a greater influence on the properties of the plasma discharge, and most chemical reactions are carried out in the liquid phase.

Method used

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  • A kind of method that gas-liquid plasma prepares anatase tio2 at low temperature
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  • A kind of method that gas-liquid plasma prepares anatase tio2 at low temperature

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Experimental program
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Effect test

Embodiment 1

[0019] Add 10 g of titanyl sulfate to 50 ml of deionized water, and stir rapidly to obtain a clear titanyl sulfate aqueous solution; add 6 ml of the above-mentioned titanyl sulfate aqueous solution to the gas-liquid plasma reactor, switch on the plasma power supply, and adjust the discharge voltage to 36 kV. Discharge for 6 minutes, you can get TiO 2 The suspension; then the solid obtained by suction filtration was washed with ethanol three times, washed with water three times, and dried at 100°C for 2 hours. The X-ray diffraction pattern of the sample is shown as the spectral line (b) in the accompanying drawing, indicating that the obtained TiO 2 The crystallinity is low, only a small amount of anatase phase is formed, and the main structure is amorphous.

Embodiment 2

[0021] The difference between embodiment 2 and embodiment 1 is that adding volume ratio in titanyl sulfate aqueous solution is 0.6% [C 4 MIM]BF 4 Ionic liquid, all the other conditions are the same as in Example 1. The X-ray diffraction pattern of the obtained sample is shown as the spectral line (c) in the accompanying drawing, indicating that the obtained TiO 2 It has a single anatase phase structure, and the particle size is about 13nm according to the Scherrer formula.

Embodiment 3

[0023] The difference between embodiment 3 and embodiment 1 is that adding volume ratio in titanyl sulfate aqueous solution is 2.4% [C 4 MIM]HSO 4 Ionic liquid, all the other conditions are the same as in Example 1. The X-ray diffraction pattern of the obtained sample is shown as the spectral line (d) in the accompanying drawing, indicating that the obtained TiO 2 It has a single anatase phase structure, and the particle size is about 8nm according to the Scherrer formula.

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Abstract

The invention relates to a method of low-temperature preparation of anatase TiO2 by gas-liquid plasma. According to the method, titanyl sulfate is adopted as a titanium precursor, and an aqueous titanyl sulfate solution containing a certain amount of an imidazolium-based ionic liquid is adopted as a liquid medium. The anatase TiO2 is prepared by preparing a suspension containing TiO2 by utilization of an atmospheric pressure dielectric barrier discharge technology, washing solid obtained by suction filtration with ethanol for three times, washing the solid with water for three times, and drying at 100 DEG C for 2 h. The invention provides the method of fast anatase TiO2 preparation in a liquid phase by utilization of the ionic liquid under atmospheric pressure. The method has advantages of easily available raw materials, simple preparation technology, and short preparation time. The prepared anatase TiO2 can be used in the field of environment pollution control.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to the low-temperature preparation of anatase TiO by atmospheric pressure gas-liquid plasma 2 Methods. Background technique [0002] Anatase TiO 2 It is an important functional material with broad application prospects. Because of its stable chemical properties, strong oxidation ability, high catalytic activity, non-toxicity, and low cost, it has become an ideal environment-friendly photocatalyst. [0003] Anatase TiO 2 The traditional preparation methods include chemical co-precipitation method and sol-gel method, but the prepared samples need to be roasted at a high temperature of 400-500 °C for a certain period of time. Although hydrothermal or solvothermal methods can prepare anatase TiO at lower temperatures 2 , but the preparation time is as long as more than ten hours. Dielectric barrier discharge is an important way to generate cold plasma under atmospheric p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 张秀玲张丽娟底兰波李燕春
Owner 西安前沿材料科技有限公司
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