Methane In Situ Deposition Prepared Of Carbon Nanotubes And Its Performance Study Of Loaded Amorphous Alloy Catalyst

Because of large surface area, conductive performance, high strength and toughness, excellent chemical stability and unique electronic, pore structure and adsorption properties, the carbon nanotubes has charming application prospects in the fields of environment, information, energy and catalysis. Nowadays, chemical vapor deposition (CVD) is the most studied preparation methods of carbon nanotubes.In this paper, the carbon nanotubes were prepared by in situ deposition of methane on NiO/γ-Al₂O₃ and perovskite LaNiO3 catalyst prepared by sol-gel combustion method as catalysts. Thermogravimetry (TG-DTG), X-ray Diffraction (XRD), High Resolution and Transmission Electron Microscope (TEM, HRTEM) and Scan Electron Microscope (SEM) were used to analysis of the structure and morphology of carbon nanotubes. The Influencing factors involving the preparation and purification of carbon nanotubes were investigated. These factors include mainly the reduction time of catalyst, the pyrolysis time and temperature of methane, the dosage of catalyst and the flow rate of carbon source gas, as well as purified methods and procedures, etc.The research results show that the preparation of carbon nanotubes with high purity and yield by in situ deposition of methane on LaNiO3 catalyst is feasible. In order to improve the surface adsorption properties of carbon nanotubes, experiment on surface modification of carbon nanotubes was also conducted.Amorphous alloy has wide application in catalysis field because of its structural particularity and high catalytic activity. In this paper, Co-B/CNT catalyst was prepared by impregnation and chemical reduction method, and its catalytic performance for catalyzing the hydrolysis of sodium borohydride to produce hydrogen was mainly investigated.