Synthesis and Characterization of Graphite-Encapsulated Iron Nanoparticles from Ball Milling-Assisted Low-Pressure Chemical Vapor Deposition.

ABSTRACT: Graphite-encapsulated Fe nanoparticles were synthesized using a combined method of high-energy ball milling and low-pressure chemical vapor deposition (LPCVD). Fe2O3 and graphite powders were milled to increase their surface areas and obtain a more homogeneous distribution. LPCVD was performed at a pressure of ~0.57 Torr in a tube furnace under a CH4/H2 atmosphere at 1050°C for 1 and 3 h. As-synthesized samples were purified in a 2 M HF solution. Characterization was performed using X-ray diffractometry (XRD), scanning and transmission electron microscopy (SEM and TEM) and alternating gradient magnetometry (AGM). XRD revealed the presence of body centered cubic (BCC) and face centered cubic (FCC) Fe phases without residual iron oxides. SEM confirmed the powders were better mixed and smalle

SUBMITTER: Agaogulları D 

PROVIDER: S-EPMC5807011 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature