A nanocrystalline ordered mesoporous tio 2 Membrane and its preparation method

A nano-crystallization and ordered mesoporous technology, applied in the field of nano-crystallized ordered mesoporous TiO2 film and its preparation, to achieve good degradation performance, controllable synthesis conditions, and high specific surface area

Active Publication Date: 2020-10-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A nanocrystalline ordered mesoporous tio <sub>2</sub> Membrane and its preparation method
  • A nanocrystalline ordered mesoporous tio <sub>2</sub> Membrane and its preparation method
  • A nanocrystalline ordered mesoporous tio <sub>2</sub> Membrane and its preparation method

Examples

Experimental program
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Embodiment 1

[0035] Example 1, high thermal stability, ordered mesoporous TiO with two-dimensional hexagonal structure 2 Membrane synthesis: Dissolve 2 g of P123 template in 20 – 60 g of ethanol and stir for 3 – 5 hours. Add 0.02 mol of ethyl titanate or isopropyl titanate or butyl titanate or titanium tetrachloride, and 0.02-8 g of one of the above-mentioned acids, and continue stirring for 3-5 hours. Transfer the sol solution to a cabinet with a temperature of 10-20°C, a relative humidity of 10-20%, and filled with saturated ethanol vapor. A layer of sol liquid film is covered on the surface of glass sheet, ceramic sheet, single crystal silicon sheet and stainless steel sheet by immersion-pulling method, and then the substrate with liquid film is placed horizontally on the sample holder. Regulating the outward diffusion flow of ethanol vapor in the cabinet, the ethanol on the surface of the carrier is gradually volatilized, and the titanium source molecules and their oligomers and the t...

Embodiment 2

[0036] Example 2, high thermal stability, three-dimensional hexagonal structure ordered mesoporous TiO 2 Synthesis of membrane material: Dissolve 1 gram of F127 template in 20 – 40 grams of ethanol and stir for 8 – 10 hours. Add 0.015 mol of ethyl titanate or isopropyl titanate or butyl titanate or titanium tetrachloride, and 0.02 - 8 g of one of the above acids, and continue stirring for 8 - 10 hours. Transfer the sol solution to a cabinet filled with saturated ethanol vapor at a temperature of 20-30°C and a relative humidity of 40-50%. A layer of sol liquid film is covered on the surface of glass sheet, ceramic sheet, single crystal silicon sheet and stainless steel sheet by immersion-pulling method, and then the substrate with liquid film is placed horizontally on the sample holder. Regulating the outward diffusion flow of ethanol vapor in the cabinet, the ethanol on the surface of the carrier is gradually volatilized, and the titanium source molecules and their oligomers ...

Embodiment 3

[0037] Example 3, synthesis of highly thermally stable and ordered mesoporous titanium dioxide film with three-dimensional cubic structure: 1.5 grams of F108 template agent was dissolved in 40-50 grams of ethanol, and stirred for 6-8 hours. Add 0.03 mol of ethyl titanate or isopropyl titanate or butyl titanate or titanium tetrachloride, and 0.02 - 8 g of one of the above acids, and continue stirring for 10 - 12 hours. Transfer the sol solution to a cabinet filled with saturated ethanol vapor at a temperature of 35-45°C and a relative humidity of 70-80%. A layer of sol liquid film is covered on the surface of glass sheet, ceramic sheet, single crystal silicon sheet and stainless steel sheet respectively by dipping-pulling method, and then the substrate carrying the liquid film is placed on the sample holder. Regulating the flow of ethanol vapor in the cabinet to diffuse outward, the ethanol on the surface of the substrate is gradually volatilized, and the titanium source molecu...

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Abstract

The invention belongs to the technical field of inorganic films, and particularly relates to a nanocrystal ordered mesopore TiO2 film and a preparation method thereof. By jointly and cooperatively regulating factors such as the acidity of sol, the temperature and the relative humidity of a surrounding environment in a film forming process and the volatilization rate of organic solvents, and titanium precursor molecules, low polymers of the molecules and template agent molecules are synchronously self-assembled on carrier surfaces in the volatilization process of the solvents to form well-ordered organic-inorganic hybrid mesostructure gel films. The processes of titanium precursor hydrolysis, cross-linking and polymerization, gel film drying, template agent roasting removal, high-temperature hole wall crystallization and the like are performed to prepare the nanocrystal ordered mesopore TiO2 film. The method is repeatable, and synthesis conditions can be controlled. The prepared film ishigh in mesoporous structure order degree and heat stability, the thickness of the film can be controlled within a certain range, and the prepared film displays good degradation property for algal toxin under room temperature and ultraviolet irradiation in a liquid phase.

Description

technical field [0001] The invention belongs to the technical field of inorganic membrane materials, and in particular relates to a nanocrystalline ordered mesoporous TiO 2 A film and a preparation method thereof; the film has good degradation performance on pollutants such as algae toxins under room temperature and ultraviolet light irradiation. Background technique [0002] Ordered Mesoporous TiO 2 , because of its large and adjustable pore size, variable pore structure, high specific surface area, and more importantly, high photostability (high light corrosion resistance), non-toxic, cheap and relatively high activity , has very unique potential application value in the fields of photocatalysis, catalysis, photoelectric conversion, and sensing. Therefore, it has been widely concerned and researched. In practical applications, mesoporous TiO 2 It usually needs to exist in the form of a film, so the development of mesoporous TiO 2 Membrane has more application value. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/745C01G23/053
CPCB01J21/063B01J23/745B01J35/004B01J35/065B01J35/1019B01J35/1061B01J37/0018C01G23/053C01G23/0536C01P2002/72
Inventor 董维阳张笑笑
Owner FUDAN UNIV
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