Prospects for the Use of Ultrasonic Spray Pyrolysis to Prepare Catalysts for the Synthesis of Carbon Nanofibers

摘要

The application of high-frequency ultrasonic spray pyrolysis (USP) of aqueous solutions for the preparation of the NiO-CuO/10%MgO catalyst is discussed. The installation for the catalyst synthesis consists of a household humidifier, a furnace for drying the formed aerosol, and an electric precipitator for collecting the product particles. The secondary structure of the USP catalysts comprises spherical particles (0.2– 5 μm), the diameters of which are defined by the concentration of precursor salts in the solution (0.1–5 wt %). It was shown that the use of USP catalysts for the synthesis of feathery carbon nanofibers (CNFs) (C_3H_8 decomposition at 700°C) allows us to obtain a more uniform product with the maximum yield when compared with similar samples prepared by coprecipitation and mechanochemical activation.