Preparation method and application of fibrous catalyst

A catalyst and fibrous technology, which is applied in the field of preparation of fibrous catalysts, can solve the problems of complex recovery of supported nano-precious metal catalysts and inability to continuously react, and achieve the effects of reducing application costs, easy infiltration and penetration, and easy availability of raw materials

Inactive Publication Date: 2015-04-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a preparation method of fibrous catalyst, wherein through its reaction raw materials and key process steps (such as loading substrate, precious metal attachment process, reactant concentration and reaction temperature, etc.) can be improved, compared with the prior art, it can effectively solve the difficult problems of complex recovery of supported nano-precious metal catalysts and inability to carry out the reaction continuously; moreover, the preparation method has simple process, convenient operation, cheap and easy-to-obtain reaction materials, and can Effectively reduce the preparation cost of supported catalysts

Method used

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  • Preparation method and application of fibrous catalyst

Examples

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Embodiment 1

[0026] Synthesis of Cellulose Polydopamine / Palladium Composite:

[0027] 1) Synthesis of cotton fiber polydopamine (that is, cotton fiber wrapped in polydopamine, cotton fiber wrapped in polydopamine) composite material: Dissolve tris in water to prepare 100mM tris aqueous solution 100mL , at 20°C, add 300 mg of fiber to 10 mM tris aqueous solution, then add 300 mg of dopamine hydrochloride, stir and react for 48 hours, during which dopamine hydrochloride polymerizes and wraps on the cotton fiber to obtain cotton fiber Polydopamine composite material;

[0028] 2) Preparation of cotton fiber polydopamine / palladium (that is, cotton fiber wrapped by polydopamine / palladium) composite material: Dissolve potassium chloropalladate in water to obtain 100mL of 10mM aqueous solution, pre-cool the solution in an ice bath, The cotton fiber polydopamine composite material was added therein, stirred and reacted at 0° C. for 0.5 hour, then excess potassium chloropalladate was removed by fil...

Embodiment 2

[0034] Synthesis of glass fiber polydopamine / palladium complex:

[0035] 1) Synthesis of glass fiber polydopamine (that is, glass fiber wrapped by polydopamine) composite material: Dissolve tris in water to prepare 10 mM tris aqueous solution, and at 25 °C, add 100 mg of glass The fiber was added to 100mL of 10mM tris aqueous solution, then 200mg of dopamine hydrochloride was added, and stirred for 36 hours. During this process, dopamine hydrochloride was polymerized and wrapped on the fiber to obtain a glass fiber polydopamine composite material;

[0036] 2) Preparation of glass fiber polydopamine / palladium (that is, glass fiber wrapped by polydopamine / palladium) composite material: Dissolve potassium chloropalladate in water to obtain 100mL of 10mM aqueous solution, pre-cool the solution in an ice bath , the glass fiber polydopamine composite material was added therein, stirred and reacted at 5°C for 0.5 hour, then excess potassium chloropalladate was removed by filtering an...

Embodiment 3

[0038] Synthesis of Quartz Wool Fiber Polydopamine / Palladium Composite:

[0039] 1) Synthesis of quartz wool fiber polydopamine composite material: Dissolve tris in water to prepare 100 mL of 10 mM tris aqueous solution, add 100 mg of quartz wool fiber to 10 mM tris at 60 °C In the aminomethane aqueous solution, add 400mg of dopamine hydrochloride again, stir and react for 3 hours, during which the dopamine hydrochloride is polymerized and wrapped on the quartz wool fiber to obtain the quartz wool fiber polydopamine composite material;

[0040] 2) Preparation of quartz wool fiber polydopamine / palladium composite material: dissolving potassium chloropalladate in water to obtain 100 mL of a 10 mM aqueous solution, precooling the solution in an ice bath, adding the quartz wool fiber polydopamine composite material, Stir and react at 0°C for 2 hours, then remove excess potassium chloropalladate by filtering and rinsing, and then freeze-dry to obtain a quartz wool fiber polydopamin...

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Abstract

The invention discloses a preparation method and application of a fibrous catalyst. The preparation method comprises the following steps: (1) synthesizing a fiber @ polydopamine composite material; (2) preparing a fiber@ polydopamine-precious metal composite material; (3) finally obtaining the fibrous catalyst. The fibrous catalyst is applied to fixed beds. By using reaction materials which are low in cost and easy to get, the prepared fibrous catalyst is easy to separate and recover, can be applied to fixed beds, can be used for realizing continuous catalystic reaction, has positive effect for reducing the application cost of the catalyst and has the advantage of improving the production efficiency.

Description

technical field [0001] The invention belongs to the field of catalysts, and more specifically relates to a preparation method and application of a fibrous catalyst. Background technique [0002] Catalysts are reagents often used in chemical reactions, mainly to increase the reaction rate and efficiency. Noble metal is a common type of catalyst, and noble metal nanoparticles have become a research hotspot for researchers because of their large surface area and high catalytic performance. [0003] Noble metal nanoparticles can be directly used as catalysts, but the effective surface area of ​​the catalyst is likely to decrease due to the easy agglomeration of nano-metal particles, resulting in a decrease in catalytic performance. The method used to improve the catalytic efficiency of nano metal particles in the prior art is mainly to load metal nanoparticles on a carrier. [0004] However, further studies have shown that although the existing partially supported nano-noble m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/06
Inventor 王帅奚江波
Owner HUAZHONG UNIV OF SCI & TECH
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