Preparation of carbon nanofibers using ferric nitrate from the V-type pyrolysis flame

Abstract

Synthesis carbon nanofibers from V-type pyrolysis flame is a novel technique. It need only simple experimental conditions and equipments. The V-type pyrolysis flame experimental apparatus is introduced. Carbon nanofibers were characterized by scanning electron microscope and transmission electron microscope. Carbon monoxide is as carbon source and the acetylene/air premixed gas provides heat by combustion. Hydrogen/helium premixed gas acts as diluted and protection gas. Ferric nitrate was served as catalyst precursor. Experimental results indicated that carbon nanofibers can be captured when ferric nitrate was served as catalyst precursor and sampling time was 7 minutes. The appropriate diameter of catalyst particles is from 20 to 50 nm. There will be much impurity and worse morphology carbon nanofibers if the diameter of catalyst particle is above 50nm.