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High-stability silver oxide-graphene composite material as well as preparation method and application thereof

A high-stability, composite material technology, applied in chemical instruments and methods, water treatment of special compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve rare problems and achieve stable and strong composite structure The effect of photocatalytic activity and easy recycling and recycling

Inactive Publication Date: 2020-01-03
武汉低维材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current research work on silver oxide-graphene composites is rare

Method used

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  • High-stability silver oxide-graphene composite material as well as preparation method and application thereof
  • High-stability silver oxide-graphene composite material as well as preparation method and application thereof
  • High-stability silver oxide-graphene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of high stability silver oxide-graphene composite material of the present embodiment, described method comprises the steps:

[0036] Step 1: 200mM / L AgNO 3 Preparation: Weigh 6.795g AgNO 3 In a beaker, add 200mL deionized water and stir for 10min to obtain 200mM / L AgNO 3 solution.

[0037] Step 2: Preparation of graphene powder: Add 80mL of sodium sulfate aqueous solution to a 100mL flask in an ice-water bath, then insert two graphite rods in parallel into the sodium sulfate solution, with a distance of 4cm between the two electrodes, and apply a 10V DC voltage for continuous Electrolyzed for 3 hours to obtain graphene electrolyte. Due to the continuous heat release during the electrolysis process, the temperature of the electrolyte is controlled by ice water at 30-35°C. Take the upper layer graphene electrolyte after standing still, ultrasonically vibrate for 5 minutes in an ultrasonic cleaner, and centrifuge at a speed of 1000r / min for...

Embodiment 2

[0040] The preparation method of a highly stable silver oxide-graphene composite material in this embodiment is basically the same as the preparation method of the silver oxide-graphene composite material in Example 1, the only difference is that step 3 is different.

[0041] Step 3 of this embodiment is specifically as follows:

[0042] Weigh 0.2g of the graphene powder and polyethylene glycol (PEG) in the above step 2 in a 150mL round bottom flask, add 95mL of ethanol and water mixed solvent, the volume ratio is 5:1, and the mixed solution is ultrasonically Make it evenly dispersed. Add 1.3mL of 200mM / L AgNO prepared in step 1 dropwise 3 solution, and then dropwise add 3mol / L aqueous potassium hydroxide solution to adjust the pH value of the mixed solution to 9, corresponding to a silver oxide-graphene composite material with a mass ratio of 15%, and react in an oil bath at 110°C for 1.5h . After the reaction, the resulting precipitate was cooled to room temperature and c...

Embodiment 3

[0044] The preparation method of a highly stable silver oxide-graphene composite material in this embodiment is basically the same as the preparation method of the silver oxide-graphene composite material in Example 1, the only difference is that step 3 is different.

[0045] Step 3 of this embodiment is specifically as follows:

[0046] Take by weighing the graphene powder and polyethylene glycol (PEG) in 0.2g above-mentioned step 2 in 250mL round bottom flask, add the mixed solvent of 120mL isopropanol and water wherein, volume ratio is 5:1, will mix The liquid is ultrasonically dispersed evenly. Add 1.3mL of 200mM / L AgNO prepared in step 1 dropwise 3 Solution, and then dropwise add 3mol / L potassium hydroxide aqueous solution thereinto, adjust the pH value of the mixed solution to 9, correspond to the silver oxide-graphene composite material with a mass ratio of 15%, and react in an oil bath at 120°C for 2h. After the reaction, the resulting precipitate was cooled to room ...

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Abstract

The invention discloses a high-stability silver oxide-graphene composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The silver oxide-graphene composite material comprises silver oxide and graphene, and the mass ratio of the silver oxide to the graphene is (10-20): 100, wherein the graphene is prepared by an electrochemical method, and the preparation method comprises the following specific steps: inserting paired graphite electrodes into an electrolyte comprising sodium sulfate and water, and then electrifying the paired graphite electrodes for electrolysis to obtain a graphene electrolyte; and carrying out post-treatment on the graphene electrolyte. The composite material prepared by the invention can effectively inhibit the occurrence of a photo-corrosion phenomenon; the photocatalyst can effectively degrade malachite green in organic dye wastewater under the irradiation of simulated sunlight, has highphotocatalytic activity and high photochemical stability, is convenient to recycle, regenerate and recycle, is simple in preparation process, and has great application value in the aspect of environmental sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a highly stable silver oxide-graphene composite material and a preparation method and application thereof. Background technique [0002] In recent years, with the continuous development of society and the continuous advancement of science and technology, while people's quality of life has been greatly improved, the two major problems of energy resource shortage and environmental degradation have become increasingly severe. Different from traditional methods, photocatalytic technology utilizes sunlight energy to completely degrade organic pollutants in water and air, does not produce secondary pollution, and is simple to operate. It is considered to be the most promising technology in wastewater treatment, especially industrial wastewater treatment. one. [0003] Although a single silver compound photocatalytic material has a high photoresponse performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50C02F1/30C02F101/30C02F101/38
CPCB01J23/50C02F1/30C02F2101/38C02F2305/10C02F2101/308B01J35/39
Inventor 常海欣李刚辉郭辉
Owner 武汉低维材料研究院有限公司
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