Open AccessHPHT synthesis and magnetic property of -Fe2O3@C core-shell nanorods
Author(s) -
Songbo Zhang,
Wang Fang-Biao,
Faming Li,
Wen Ge-Hui
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.108101
Subject(s) - nanorod , materials science , hydrothermal circulation , core (optical fiber) , coercivity , shell (structure) , nanostructure , chemical engineering , hydrothermal synthesis , nanotechnology , composite material , condensed matter physics , physics , engineering
-Fe2O3@C core-shell nanorods with average diameter of 20 nm and length of 150 nm are synthesized by transforming FeOOH@PVA nanorods under the condition of high pressure and high temperature (HPHT). The FeOOH@PVA nanorods are prepared via a hydrothermal route. The best synthesis condition for transforming FeOOH@PVA core-shell nanorods into -Fe2O3@C nanorods is 400 ℃ under 1 GPa. Owing to high aspect ratios, the -Fe2O3@C nanorods present a high coercivity of 330 Oe (10 Oe=79.5775 A/m). The possible mechanism for the synthesis of -Fe2O3@C nanorods is also discussed. The HTHP method can provide a new way for preparing of one-dimensional core-shell nanostructures.