Method for preparing carbon-supported transition metal silicides from rice husks

A transition metal, supported technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of unfavorable large-scale production, low output, high equipment requirements, etc., to achieve low density and high output tall, bulky effect

Inactive Publication Date: 2018-11-02
HEILONGJIANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problems that existing methods for preparing transition metal silicides have high requirements for equipment, precise control of reaction parameters, low yield, and unfavorable large-scale production; and provide a method for preparing carbon loads from rice husks Type Transition Metal Silicide Method

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  • Method for preparing carbon-supported transition metal silicides from rice husks
  • Method for preparing carbon-supported transition metal silicides from rice husks

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specific Embodiment approach 1

[0025] Specific embodiment one: the method for preparing carbon-loaded transition metal silicides from rice husks in this embodiment is characterized in that the method is carried out according to the following steps:

[0026] Step 1. Rice husks are crushed to obtain rice husk fragments. Sodium lauryl sulfate is prepared into a 0.05mol / l aqueous solution, and 50mL is taken, and 3g of rice husk fragments are added. min. Stir at room temperature for 2 hours, let stand for 2 hours, wash with distilled water and ethanol in turn, and dry at 60°C for 24 hours;

[0027] Step 2, preparing FeCl with a concentration of 2mol / l 3 150ml aqueous solution, add 9g ZnCl 2 As a pore-forming agent, ultrasonically treat for 15 minutes under the condition of ultrasonic power of 100W, then stir at 500r / min at room temperature for 10h, then add the rice husk fragments treated in step 1, and stir at 500r / min at room temperature. Stirring at low temperature for 10 hours, washing with distilled water...

specific Embodiment approach 2

[0032] Specific embodiment two: the method for preparing carbon-loaded transition metal silicides from rice husks in this embodiment is characterized in that the method is carried out according to the following steps:

[0033] Step 1: The rice husk is crushed to obtain rice husk fragments, and polyethyleneimine is prepared into a 0.05mol / l aqueous solution, and 50mL is taken, 3g of rice husk fragments are added, and ultrasonic treatment is performed for 15min under the condition of ultrasonic power of 100W, at a speed of 400r / min, Stir at room temperature for 2 hours, let stand for 2 hours, wash with distilled water and ethanol in turn, and dry at 60°C for 24 hours;

[0034] Step 2, configure the sodium tungstate (Na 2 WO 4 ) aqueous solution 150ml, add 9g ZnCl 2 (pore-forming agent), under the condition of ultrasonic power of 100W, sonicate for 15min, then stir at 400r / min at a rotating speed and room temperature for 10h, then add the rice husk fragments treated in step 1, ...

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Abstract

The invention discloses a method for preparing a carbon-loaded transition metal silicide from rice husks, and relates to a method for preparing a catalytic material. The invention aims to solve the technical problems that existing methods for preparing transition metal silicides have relatively high requirements on equipment, precise regulation of reaction parameters, low yield, and unfavorable large-scale production. The method of the present invention: 1. Pulverize rice husks to obtain rice husk fragments, modify the surface of the rice husk fragments with a negatively charged or positively charged surfactant, wash with distilled water and ethanol in sequence, and dry; 2. Prepare an aqueous solution of metal ions, Add a pore-forming agent, stir after ultrasonic treatment, then add the rice husk fragments treated in step 1, stir, wash with distilled water and ethanol in turn, and dry to obtain the reaction precursor; 3. Carbonize the precursor under an inert atmosphere to obtain Carbon-Supported Transition Metal Silicides. The product of the invention is used for electrochemically catalyzing hydrogen evolution.

Description

technical field [0001] The invention belongs to the simple and large-scale preparation of catalytic materials by using agricultural waste biomass. It specifically involves the surface modification of rice husk, using the silicon homogeneously distributed in the rice husk as the silicon source, using the lignin and cellulose of the rice husk itself as the in-situ carbon source, and introducing Fe, Co, Ni, W, Mo , V ions are used as the metal source, and the carbonization reaction is synchronously obtained in an inert atmosphere to obtain a silicide / carbon composite material. Background technique [0002] Transition metal silicides have been widely used in the fields of electric heating elements, integrated circuits and high-temperature anti-oxidation coatings due to their high melting point, low resistivity, good heat transfer and excellent high temperature resistance. Traditional transition metal silicide preparation methods include dissolved salt reaction technology, chemi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18
CPCB01J21/18
Inventor 王瑞红
Owner HEILONGJIANG UNIV
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