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Complex electric catalyst and preparation method thereof

An electrocatalyst and composite technology, applied in the field of electrochemical catalysis, can solve the problems of poor anti-toxicity and anti-aging ability of the catalyst, and achieve the effects of protecting excellent characteristics, easy to popularize and apply, and stable in nature.

Inactive Publication Date: 2011-10-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst produced by this method has poor anti-toxicity and anti-aging ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composite electrocatalyst of this embodiment is composed of sepiolite and graphene-modified tin dioxide loaded on sepiolite, the mass ratio of said sepiolite to graphene-modified tin dioxide is 0.5:1, and the graphite The mass ratio of alkene to tin dioxide is 0.1:1000.

[0025] Its preparation method is:

[0026] (1) Pretreatment of sepiolite: after the sepiolite is ground and pulverized in a mortar, pass through a 100-mesh sieve, then soak and wash the sieved sepiolite with distilled water for three times, and then wash the sepiolite The stone is dried at a temperature of 90°C, and finally the dried sepiolite is ground in a mortar and passed through a 100-mesh sieve to obtain sepiolite powder; the mass ratio of the sepiolite to distilled water is 1: 7;

[0027] (2) Preparation of graphene-tin tetrachloride sol: add 0.5 mg graphene to 100 mL of tin tetrachloride solution with a tin concentration of 20%, oscillate evenly, and after ultrasonic dispersion for 20 min...

Embodiment 2

[0030] The composite electrocatalyst of this embodiment is composed of sepiolite and graphene-modified tin dioxide loaded on sepiolite, the mass ratio of the sepiolite and graphene-modified tin dioxide is 1:1, and the graphite The mass ratio of alkene to tin dioxide is 1.2:1000.

[0031] Its preparation method is:

[0032] (1) Pretreatment of sepiolite: after the sepiolite is ground and pulverized in a mortar, pass through a 100-mesh sieve, then soak and wash the sieved sepiolite with distilled water for three times, and then wash the sepiolite The stone is dried at a temperature of 120° C., and finally the dried sepiolite is ground in a mortar and passed through a 100-mesh sieve to obtain sepiolite powder; the mass ratio of the sepiolite to distilled water is 1: 5;

[0033] (2) Preparation of graphene-tin tetrachloride sol: add 1.2mg graphene to 100mL of tin tetrachloride solution with a tin concentration of 5%, oscillate evenly, and after ultrasonic dispersion for 20min, s...

Embodiment 3

[0036] The composite electrocatalyst of the present embodiment is composed of sepiolite and graphene-modified tin dioxide loaded on sepiolite, the mass ratio of the sepiolite to the graphene-modified tin dioxide is 1.5:1, and the graphite The mass ratio of alkene to tin dioxide is 1.5:1000.

[0037] Its preparation method is:

[0038] (1) Pretreatment of sepiolite: after the sepiolite is ground and pulverized in a mortar, pass through a 100-mesh sieve, then soak and wash the sieved sepiolite with distilled water for three times, and then wash the sepiolite The stone is dried at a temperature of 105° C., and finally the dried sepiolite is ground in a mortar and passed through a 100-mesh sieve to obtain sepiolite powder; the mass ratio of the sepiolite to distilled water is 1: 10;

[0039] (2) Preparation of graphene-tin tetrachloride sol: add 2.2mg graphene to 50mL tin tetrachloride solution with a tin concentration of 10%, oscillate evenly, and after ultrasonic dispersion fo...

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PUM

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Abstract

The invention discloses a complex electric catalyst and a preparation method thereof. The catalyst consists of sepiolite and graphene modified tin dioxide supported on the sepiolite. The preparation method comprises the following steps of: preprocessing the sepiolite to obtain sepiolite powder; preparing a graphene-stannic chloride sol; and mixing the sepiolite powder and the graphene-stannic chloride sol, uniformly stirring by using a constant temperature magnetic heating stirrer, standing for ageing, performing centrifugal separation, drying, baking, grinding and sieving to obtain the complex electric catalyst. The preparation method is simple, low in manufacturing cost and easy to promote and apply; good characteristics of graphene are protected to the greatest extent, and the catalytic efficiency of the electric catalyst is improved maximally; and the prepared complex electric catalyst has stable properties and high electric catalytic efficiency and can be reused.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a composite electrocatalyst and a preparation method thereof. Background technique [0002] Sepiolite is a fibrous magnesium-rich silicate clay mineral formed under alkaline conditions. Studies have shown that sepiolite fibers have transitional structure characteristics of chains and layered fibers, and are porous solid filter media with plasticity. Large, there are many tortuous channels inside the medium, which has the characteristics of strong adsorption, good rheology, and excellent catalytic heat resistance. However, natural sepiolite itself has defects such as weak surface acidity, small channels, poor thermal stability, and damage to the structure of molecular sieve components under water vapor conditions, so it needs to be modified. Generally, acid activation treatment and heat activation treatment are used to make it suitable as a catalyst ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14A62D3/115
Inventor 杨胜科朱涛王文科陈静赵钺费晓华周敏吴莹丁凤
Owner CHANGAN UNIV
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