Photoinduced liquid film pH step-by-step regulation method for synthesizing mesoporous heteroatomic molecular sieve

A heteroatom molecular sieve and liquid membrane technology, applied in molecular sieve compounds, molecular sieve characteristic silicates, chemical instruments and methods, etc., can solve the problems of complex chelating agent structure, limited metal elements, complicated synthesis operations, etc., and reduce the reaction heat effect. , The effect of fast curing rate and controllable light parameters

Active Publication Date: 2018-05-22
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the chelating agent is complicated, the synthesis operation is cumbersome, and the applicable metal elements are limited, so it is difficult to be extended to the synthesis of other mesoporous heteroatom molecular sieve membranes.

Method used

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  • Photoinduced liquid film pH step-by-step regulation method for synthesizing mesoporous heteroatomic molecular sieve
  • Photoinduced liquid film pH step-by-step regulation method for synthesizing mesoporous heteroatomic molecular sieve
  • Photoinduced liquid film pH step-by-step regulation method for synthesizing mesoporous heteroatomic molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] 25g of tetrabutyl titanate stabilized with acetylacetone, 1000g of tetraethyl silicate, 100g of P123, 10g of Irgacure 103 and 20g of Irgacure 907 were mixed and stirred evenly to obtain a coating solution;

[0025] Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0026] Use ultraviolet light with a wavelength of 350nm and an intensity of 50% to irradiate the liquid film applied on the substrate for photoreaction for 30 minutes to decompose Irgacure 103, and then use ultraviolet light with a wavelength of 300nm and an intensity of 50% to irradiate the liquid film applied on the substrate. The membrane was subjected to a light reaction for 30 minutes to decompose the Irgacure 907, and realize the step-by-step regulation of the pH of the liquid membrane from acidic to alkaline, and obtain a mesoporo...

Embodiment approach 2

[0030] 25 g of tetrabutyl titanate stabilized with acetylacetone, 1000 g of tetraethyl silicate, 250 g of P123, 25 g of Irgacure 103 and 35 g of Irgacure 907 were mixed and stirred evenly to obtain a coating solution;

[0031] Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0032] Use ultraviolet light with a wavelength of 390nm and an intensity of 20% to irradiate the liquid film applied on the substrate for photoreaction for 20 minutes to decompose Irgacure 103, and then use ultraviolet light with a wavelength of 320nm and an intensity of 20% to irradiate the liquid film applied on the substrate. The membrane undergoes photoreaction for 20 minutes to decompose Irgacure 907, realize the step-by-step regulation of liquid membrane pH from acidic to alkaline, and obtain a mesoporous heteroatom molecular ...

Embodiment approach 3

[0035] 25 g of tetrabutyl titanate stabilized with acetylacetone, 1000 g of tetraethyl silicate, 500 g of P123, 50 g of Irgacure 103 and 50 g of Irgacure 907 were mixed and stirred evenly to obtain a coating solution;

[0036] Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0037] Use ultraviolet light with a wavelength of 420nm and an intensity of 90% to irradiate the liquid film applied on the substrate for photoreaction for 10 minutes to decompose Irgacure 103, and then use ultraviolet light with a wavelength of 350nm and an intensity of 90% to irradiate the liquid film applied on the substrate. The membrane undergoes photoreaction for 10 minutes to decompose Irgacure 907, realize the step-by-step regulation of liquid membrane pH from acidic to alkaline, and obtain a mesoporous heteroatom molecular ...

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Abstract

The invention relates to the field of synthesis of a mesoporous heteroatomic molecular sieve film, and discloses a photoinduced liquid film pH step-by-step regulation method for synthesizing a mesoporous heteroatomic molecular sieve. The method comprises uniformly mixing and stirring a transition metal precursor, a silicon source, a template, a photo acid generator (PAG) and a photo base generator(PBG) to obtain a coating solution; uniformly applying the coating solution to a substrate to form a liquid film; performing UV-irradiation with the wavelength being 350-420 nm and the intensity being 10-100% to the liquid film, and performing UV-irradiation with the wavelength being 300-350 nm and the intensity being 10-100% to the liquid film to obtain a template-containing mesoporous heteroatomic molecular sieve film; and performing UV-irradiation with the wavelength being 350 nm and the intensity being 50-100% to the mesoporous heteroatomic molecular sieve film for 60-120 min to remove the template. The method is fast in curing rate, free of solvent, saved in energy, regulatable in reaction time, and controllable in optical parameters. The coating solution is continuously stable in anempty-illumination condition. The method is efficient controllable green technology.

Description

technical field [0001] The invention relates to the technical field of molecular sieve preparation, in particular to a method for synthesizing mesoporous heteroatom molecular sieves through step-by-step regulation and control of the pH of a photoinduced liquid film. Background technique [0002] Oxidation reaction is one of the most frequently used catalytic processes in chemical production, and more than 50% of chemical synthesis is related to it, the most representative of which is alkane oxidation reaction. Alkanes have a wide range of sources and low cost, but the C-H bond and C-C bond energy are too high, the target product is often more active than the raw material, and it is easy to cause problems such as high energy consumption, low raw material utilization rate, and serious environmental pollution due to excessive oxidation. For example, the target products of the selective oxidation reaction of cyclohexane are cyclohexanol and cyclohexanone. However, under the exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C01B37/00
CPCC01B37/005C01P2002/80C01P2002/82C01P2004/04C04B41/5024C04B41/85C04B41/4535C04B41/0045
Inventor 吴妹王玉琪张鹏宇李爽刘鹏倪伶俐许晨红蒋金龙陈静
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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