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Preparation method of CeO2/TiO2 nanotube composite material

A technology of composite materials and nanotubes, applied in the field of preparation of composite materials, can solve the problems of high cost and limited scope of application, and achieve the effects of good dispersion, uniform structure and excellent photocatalytic performance

Active Publication Date: 2019-01-04
UNIV FOR SCI & TECH ZHENGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The Chinese patent application whose publication number is CN108149300A provides a CeO 2 Nanoparticles / TiO 2 A method for preparing a nanotube array composite heterojunction film, but it uses an anodic oxidation method to prepare TiO 2 Nanotube array, and the product is thin film, high cost, limited scope of application

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  • Preparation method of CeO2/TiO2 nanotube composite material

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Experimental program
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Embodiment 1

[0024] a CeO 2 / TiO 2 A method for preparing a nanotube composite material, comprising the steps of:

[0025] (1) Take analytically pure TiO 2 Add the granules into 12mol / L NaOH solution, stir magnetically for 1h, then put them into the hydrothermal reaction kettle, the addition amount is 2 / 3 of the hydrothermal reaction kettle, react hydrothermally at 180°C for 18h, and take out the product after the reaction Soak in 3mol / L acetic acid solution for 45min, while stirring slowly at a speed of 600rpm, and suction filter after soaking to obtain the suction filtration product;

[0026] (2) preparation concentration is the cerium nitrate solution of 5mol / L, adds glycerol wherein to obtain mixed solution, and the concentration of controlling glycerol is 0.4mol / L, the suction filtration product that step (1) obtains is slowly added to In the mixed solution, slowly stir at 300 rpm and 60° C. for 10 min at the same time. After the stirring is completed, the obtained product is taken...

Embodiment 2

[0030] A preparation method of CeO2 / TiO2 nanotube composite material, comprising the steps of:

[0031] (1) Take analytically pure TiO2 particles, add them to 16mol / L NaOH solution, stir magnetically for 0.6h, then put them into a hydrothermal reaction kettle, the amount added is two-thirds of the hydrothermal reaction kettle, at 150°C Undertake the hydrothermal reaction for 36 hours, after the reaction, take out the product and place it in 1 mol / L acetic acid solution for 1 hour, and at the same time, slowly stir it at a speed of 300 rpm, and obtain the product by suction filtration after soaking;

[0032] (2) preparation concentration is the mixed solution of cerium nitrate and cerium chloride of 2mol / L, adds glycerol to obtain mixed solution wherein, and the concentration of controlling glycerol is 0.2mol / L, the step (1) obtains Suction-filtered product was slowly added to the mixed solution, and at the same time, slowly stirred at 200 rpm and 50°C for 20 minutes. After the...

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Abstract

The invention discloses a preparation method of a CeO2 / TiO2 nanotube composite material. The method comprises preparing a TiO2 nanotube precursor through a hydrothermal method, then adding in cerium salt solution and glycerol to perform CO2 modification, and performing drying treatment under protection of inert gas to obtain the CeO2 / TiO2 nanotube composite material. The preparation method of theCeO2 / TiO2 nanotube composite material replaces reaction materials on the basis of the traditional hydrothermal method, namely, after concentrated alkaline reacts with TiO2, acetic acid substitutes forhydrochloric acid to remove Na; by controlling the concentration of NaOH and the acetic acid and the soaking time, the preparation method of the CeO2 / TiO2 nanotube composite material can help controlthe morphology of the prepared TiO2 nanotube precursor and form multiple bonding active sites on the surface of the nanotube precursor to create conditions for subsequent bonding with Ce; the prepared CeO2 / TiO2 nanotube composite material is good in dispersibility, uniform in structure and excellent in photocatalytic performance.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a CeO 2 / TiO 2 Preparation methods of nanotube composites. Background technique [0002] Titanium dioxide (TiO 2 ) is a white solid or powdery amphoteric oxide, which is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. It has a high melting point and is also used to make fire-resistant glass, glaze, enamel, clay, and high-temperature-resistant experimental vessels. [0003] TiO 2 It is also a wide bandgap semiconductor with a bandgap of about 3.2eV and excellent physical and chemical stability. Therefore, it has been widely used and researched in the fields of photocatalysis, solar cells, and sensor components. [0004] With the increasingly severe energy and environmental problems, more and more researches on semiconductor photocatalysts, TiO 2 Nanotubes are widely used in the field of photo...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J37/10B82Y30/00B82Y40/00C01B3/04
CPCB82Y30/00B82Y40/00C01B3/042B01J23/002B01J23/10B01J37/10C01B2203/1041C01B2203/0277B01J35/39Y02E60/36
Inventor 郭禧斌郑剀心
Owner UNIV FOR SCI & TECH ZHENGZHOU