TY - JOUR
T1 - Graphite nanosheets doped with Fe, Ni, and N, synthesized in one step, and their unique magnetic performance
AU - Xu, Zhanwei
AU - Li, Hejun
AU - Luo, Huijuan
AU - Sun, Huihui
AU - Zhang, Qinglin
AU - Cao, Gaoxiang
AU - Li, Kezhi
PY - 2011/4
Y1 - 2011/4
N2 - Graphite nanosheets (GNs) doped with N, Fe, or Ni were synthesized by pyrolysis of metal tetrapyridinoporphyrazine (MPTpz, M=Fe2+, and Ni2+) and a mixture of MPTpzs in a chemical vapor deposition furnace. The products obtained were characterized by scanning and transmission electron microscopy, and X-ray photoelectron spectroscopy. The magnetic properties of the GNs obtained were investigated at room temperature using a vibrating sample magnetometer with an applied field of -10 00010 000 Gs. The results show the GNs obtained are terrace-like and ultra-thin, with very high aspect ratio. Fe, Ni and N atoms have been doped to the GNs successfully. There are two types of N atom that are introduced into pure carbon systems: pyrinidic and graphitic N atoms. The GNs obtained exhibit ferromagnetic behavior at room temperature. Sample S1, obtained by pyrolysis of a mixture of MPTpzs (M=Fe2+ and Ni2+), have the highest coercivity force. The saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) values of sample S1 are 24.51 emu g-1, 3.95 emu g-1, and 207.34 Gs, respectively.
AB - Graphite nanosheets (GNs) doped with N, Fe, or Ni were synthesized by pyrolysis of metal tetrapyridinoporphyrazine (MPTpz, M=Fe2+, and Ni2+) and a mixture of MPTpzs in a chemical vapor deposition furnace. The products obtained were characterized by scanning and transmission electron microscopy, and X-ray photoelectron spectroscopy. The magnetic properties of the GNs obtained were investigated at room temperature using a vibrating sample magnetometer with an applied field of -10 00010 000 Gs. The results show the GNs obtained are terrace-like and ultra-thin, with very high aspect ratio. Fe, Ni and N atoms have been doped to the GNs successfully. There are two types of N atom that are introduced into pure carbon systems: pyrinidic and graphitic N atoms. The GNs obtained exhibit ferromagnetic behavior at room temperature. Sample S1, obtained by pyrolysis of a mixture of MPTpzs (M=Fe2+ and Ni2+), have the highest coercivity force. The saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) values of sample S1 are 24.51 emu g-1, 3.95 emu g-1, and 207.34 Gs, respectively.
KW - A. Magnetic films and multilayers
KW - A. Nanostructures
KW - A. Thin films
UR - https://www.scopus.com/pages/publications/79952532596
U2 - 10.1016/j.ssc.2011.01.020
DO - 10.1016/j.ssc.2011.01.020
M3 - 文章
AN - SCOPUS:79952532596
SN - 0038-1098
VL - 151
SP - 643
EP - 646
JO - Solid State Communications
JF - Solid State Communications
IS - 8
ER -