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Preparation method of copper/graphene catalyst

A graphene and catalyst technology, applied in the field of copper/graphene catalyst preparation, can solve the problems of high process equipment requirements, strong reducing agent toxicity, etc., and achieve the effects of good reduction effect, thorough reduction effect and high catalytic performance.

Inactive Publication Date: 2019-12-31
智环(厦门)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned preparation method of copper / graphene, there are characteristics of long-term high-temperature treatment, strong toxicity of the reducing agent used, or high requirements for process equipment, so it is required to provide a short production cycle, safe and reliable, environmentally friendly, economical and practical The preparation process of copper / graphene composite catalyst is of great significance

Method used

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  • Preparation method of copper/graphene catalyst
  • Preparation method of copper/graphene catalyst
  • Preparation method of copper/graphene catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of graphene catalyst, its preparation method is as follows:

[0035] (1) Weigh 1.0g graphene flakes and add it to the mixed solution of concentrated sulfuric acid and concentrated phosphoric acid with a volume ratio of 9:1, mechanically stir for 30min at a temperature of 0°C to 5°C, the reaction solution is a black suspension, and then Weigh 6.0g of potassium permanganate, and feed slowly at a speed within 20min. At this time, the solution turns from black to dark green, and then keep the temperature at 50°C for 15h. At this time, the reaction solution is pinkish purple. After cooling, slowly add 140ml of deionized water to ensure that the temperature is within the range of 60°C, then add 8ml of hydrogen peroxide into the reaction bottle, and stir mechanically for 10 minutes. At this time, the reaction solution is golden yellow, then wash with hydrochloric acid to remove sulfate radicals, and then wash with deionized water To neutrality, the precipitate ...

Embodiment 2

[0047] The preparation of graphene catalyst, its preparation method is as follows:

[0048] Step (1) is with embodiment 1. (2) Weigh 200.0 g of graphene oxide and add it to ultrasonic dispersion in N-methylpyrrolidone for 2 h, then mechanically stir for 10 min, adjust to pH=10 with NaOH solution, after mechanically stirring for 10 min, add 200.0 g of ascorbic acid, and mechanically stir for 30 min . In addition, 68g of copper sulfate pentahydrate was weighed and dissolved in 4L of distilled water to form a copper sulfate solution with a concentration of 17mg / ml, and then the copper sulfate solution was slowly added dropwise to the reaction solution, and reacted at 80°C for 2h; after cooling Add 100L of distilled water, let it stand to remove the upper layer, wash and centrifuge three times with distilled water and absolute ethanol in turn, collect the precipitate by centrifugation, and vacuum dry at 50°C for 16 hours to obtain a black copper / graphene solid. Measure the copper...

Embodiment 3

[0050] The preparation of graphene catalyst, its preparation method is as follows:

[0051] Step (1) is with embodiment 1. (2) Weigh 200.0 g of graphene oxide and add it to ultrasonic dispersion in N-methylpyrrolidone for 2 h, then mechanically stir for 10 min, adjust to pH=10 with NaOH solution, after mechanically stirring for 10 min, add 280.0 g of ascorbic acid, and mechanically stir for 30 min . In addition, 88g of copper sulfate pentahydrate was weighed and dissolved in 4L of distilled water to form a copper sulfate solution with a concentration of 22mg / ml, and then the copper sulfate solution was slowly added dropwise to the reaction solution and reacted at 120°C for 3 hours; after cooling Add 100L of distilled water, let it stand to remove the upper layer, wash and centrifuge three times with distilled water and absolute ethanol in turn, collect the precipitate by centrifugation, and vacuum dry at 50°C for 16 hours to obtain a black copper / graphene solid. Measure the c...

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Abstract

The invention discloses a preparation method of a copper / graphene catalyst. The preparation method comprises the steps of preparing graphene oxide by adopting an improved Hummers method and preparingcopper / graphene by adopting a chemical reduction method. The copper sulfate is used as the precursor, and the ascorbic acid is used for reducing cupric in the copper sulfate into zero-valent copper nanoparticles, and the zero-valent copper nano-particles can be dispersed on a surface of graphene to prepare and acquire a composite material containing the copper / graphene catalyst. The catalyst can realize the controllable growth of copper nanoparticles, and can be stably dispersed on the surface of graphene, thereby generating good catalytic performance. The synthesis process route of the catalyst is simple, economic, environment-friendly and safe, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanometer materials, in particular to a preparation method of a copper / graphene catalyst. Background technique [0002] Due to its high activity and strong specific surface area, nano-copper exhibits good performance in the fields of physics, chemistry, and biology. Therefore, nano-copper has a wide range of applications in catalytic synthesis. But at the same time, nano-copper also has certain deficiencies, such as easy oxidation and agglomeration. Copper composite catalysts can make up for the shortcomings of some single-material catalysts. For example, metals and composite materials can show their own advantages and achieve complementary effects after being mixed. [0003] As an ideal carrier, graphene has been favored by more and more scholars. Graphene is used as the main material, and its theoretically calculated data is higher than that of other nanomaterials. The unique ...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J35/02B01J37/16C02F1/58C02F101/38
CPCB01J23/72B01J37/16C02F1/58C02F2101/38B01J35/40
Inventor 黄锦铮
Owner 智环(厦门)科技有限公司
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