Nano thread-shaped manganese dioxide load carbon silica aerogel as well as preparation method and application thereof

Abstract

The present invention relates to nanometer fiber-shaped manganese dioxide borne carbon aerogel, a method for producing the aerogel, and an application of the aerogel. The method employs a coprecipitation method, i.e., carbon aerogel grains are dipped in potassium permanganate solution, and manganese acetate solution is added into the potassium permanganate solution drop by drop, then, the precipitate is filtered, washed, and dried. In the resulting nanometer fiber-shaped manganese dioxide borne carbon aerogel, the carbon aerogel is in a three-dimensional mesh structure formed by nanometer grains bonded together; the manganese dioxide in uniform nanometer fiber-shaped distribution; the pore size of the carbon aerogel is 20-30nm; the diameter of the fiber-shaped manganese dioxide is about 5-25nm; wherein, manganese dioxide accounts for 20-50 percent of the total mass. The method utilizes both the high specific surface area, high porosity, and good electrical conductivity features of carbon aerogel and the high specific surface area and high reactivity features of the manganese dioxide in nanometer-level distribution. The nanometer fiber-shaped manganese dioxide borne carbon aerogel can be used in environmental protection and energy domains, such as organic wastewater treatment by three-dimensional electric catalytic oxidation, and manufacturing of electrode materials for super capacitors.

Description

technical field [0001] The invention relates to a nano-filament manganese dioxide-loaded carbon airgel composite material and a preparation method thereof, as well as the application of the composite material in treating refractory biodegradable organic pollutants and supercapacitor electrode materials. Background technique [0002] Carbon airgel is a new type of nanoporous carbon material, which has the characteristics of high specific surface area, low density, abundant mesopores and good conductivity. It has a wide range of applications in many fields such as environmental protection, energy, and medicine. For example, carbon aerogels have abundant mesopores and good conductivity, and can be used as electrode materials for electrochemical treatment of organic wastewater, which not only avoids secondary pollution caused by pure adsorption, but also improves the utilization of electrode materials. Rate; carbon aerogels have high specific surface area and good conductivity, ...

AI Technical Summary

Problems solved by technology

At present, to prepare manganese dioxide / porous carbon supercapacitors, common porous carbon materials include activated carbon, carbon fiber, carbon nanotube, etc. The uneven distribution of activated carbon pore size leads to low pore utilization, and the cost of carbon fiber, carbon nanotube, etc. is relatively high. The treatment process is complicated, but carbon aerogel has the advantages of high specific surface area, concentrated and adjustable pore size distribution, and the preparation process is relatively simple, making carbon aerogel an ideal electrode material for supercapacitors.

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