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Macroscopic 3D nano-catalyst material with high porosity and low osmotic pressure and preparation method thereof

A nano-catalytic material and high-porosity technology, which is applied in the field of nano-material doping, can solve the problems of decreased specific surface area, low specific surface area of ​​mesopores, and influence on the catalytic performance of materials, and achieves a process controllable, easy to operate, and rich in pores. Effect

Active Publication Date: 2021-06-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the contribution of mesopores to the overall specific surface area of ​​the material is low, and more mesopores will cause a sharp decrease in the specific surface area, and the difference in pore structure will have an impact on the catalytic performance of the material.

Method used

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  • Macroscopic 3D nano-catalyst material with high porosity and low osmotic pressure and preparation method thereof
  • Macroscopic 3D nano-catalyst material with high porosity and low osmotic pressure and preparation method thereof

Examples

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preparation example Construction

[0029] A method for preparing a macroscopic 3D nanometer catalytic material with high porosity and low osmotic pressure, comprising the steps of:

[0030] 1) adding surfactant, tetraethyl orthosilicate, organic solvent and basic organic matter into the reactor, ultrasonically dissolving as oil phase;

[0031] 2) dissolving the aluminum salt and the magnesium salt in water as the water phase;

[0032] 3) Rapidly mixing the oil phase and the water phase to form a double continuous microemulsion;

[0033] 4) leave it to stand, and promote the reaction of the reaction precursor that is designed at the interface;

[0034] 5) drying the product obtained in step 4) under normal pressure and low temperature;

[0035] 6) Heat treating the product obtained in step 5) to obtain a macroscopic 3D nano-catalyst material with high porosity and low osmotic pressure.

[0036] In step 1), the surfactant is didodecyldimethylammonium bromide / or lecithin.

[0037] In step 1), the organic solve...

Embodiment 1

[0044] The macroscopic 3D nano catalytic material with high porosity and low osmotic pressure and its preparation method, the steps are:

[0045] 1. Weigh 1.05g of didodecyldimethylammonium bromide (DDAB) and put it into the reactor (25ml beaker);

[0046] 2. Take 3.5ml tetraethyl orthosilicate (TEOS) and pour it into the reactor;

[0047] 3. Take 3.5ml of bromotetradecane and pour it into the reactor;

[0048] 4. Take 0.7ml benzylamine and pour it into the reactor;

[0049] 5. Ultrasonic dissolution as the oil phase;

[0050] 6. Al 2 (SO 4 ) 3 18H 2 O is dissolved in water, the concentration is 0.0000560243mol / mL, MgSO 4 ·7H 2 O is soluble in water with a concentration of 0.000168073mol / mL as the water phase;

[0051] 7. Take 7ml of water phase and 7ml of oil phase, and quickly inject them into the above oil phase reactor through the dual continuous phase preparation device;

[0052] 8. Let it stand for 24 hours at room temperature;

[0053] 9. Dry under aerobic co...

Embodiment 2

[0060] The macroscopic 3D nano catalytic material with high porosity and low osmotic pressure and its preparation method, the steps are:

[0061] 1. Weigh 0.7g DDAB and put it into the reactor (25ml beaker);

[0062] 2. Take 3.5ml tetraethyl orthosilicate (TEOS) and pour it into the reactor;

[0063] 3. Take 3.5ml of bromotetradecane and pour it into the reactor;

[0064] 4. Take 1ml of propylamine and pour it into the reactor;

[0065] 5. Ultrasonic dissolution as the oil phase;

[0066] 6. Al 2 (SO 4 ) 3 18H 2 O is dissolved in water, the concentration is 0.00008mol / mL, MgSO 4 ·7H 2 O is soluble in water with a concentration of 0.0001mol / mL as the water phase;

[0067] 7. Take 7ml of water phase and 7ml of oil phase, and quickly inject them into the above oil phase reactor through the dual continuous phase preparation device;

[0068] 8. Let it stand for 24 hours at room temperature;

[0069] 9. Dry under aerobic conditions at 80°C for 24 hours;

[0070] 10. Heat...

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Abstract

The invention discloses a macroscopic 3D high-porosity and low-osmotic pressure nano-catalytic material, which belongs to the technical field of nano-materials. The nano-catalytic material has a strength higher than 5 kPa, a shrinkage rate of ≤ 15% from liquid to final solid, and a surface area of ​​≥ 100 m 2 / g, density≤0.1g / cm ‑3 , the porosity of the overall solid material is greater than or equal to 90%, and the osmotic pressure is less than or equal to 10MPa / m. The invention also discloses its preparation method. The macroscopic 3D high porosity and low osmotic pressure nano-catalytic material of the present invention can easily control the macroscopic shape of the material, the overall material has abundant pores, the material has a high porosity, the porosity is all above 90%, and the osmotic pressure is less than or equal to 10MPa / m, the catalytic degradation performance of organic matter is good, and the degradation rate is above 80%; the preparation method of the macroscopic 3D high porosity and low osmotic pressure nano-catalytic material of the present invention has the advantages of simple process, easy operation and controllable process.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial doping, and in particular relates to a macroscopic 3D nanocatalytic material with high porosity and low osmotic pressure and a preparation method thereof. Background technique [0002] Nanomaterials generally refer to materials with at least one dimension in the nanoscale range in three-dimensional space or composed of them as basic units. As a branch of nanomaterials, nanocatalytic materials have the general properties of nanomaterials, and at the same time, they meet the requirements of catalytic materials for particle size, surface area size, electronic properties, adsorption performance and catalytic reaction performance. [0003] The synthesis method of nano-catalytic materials is one of the most direct and critical factors affecting the catalytic performance. The commonly used synthesis methods are: precipitation method, sol-gel method, hydrolysis method, hydrothermal method and microe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/14B01J35/10B01D53/86B01D53/72
CPCB01J21/14B01D53/8668B01J35/615
Inventor 祝建中苏梦张欢陈靓朱秋子
Owner HOHAI UNIV