Structure and Room-Temperature Ferromagnetism of Zn-Doped SnO2 Nanorods Prepared by Solvothermal Method

详细信息    查看全文

• 作者：Xiaofang Liu ; Javed Iqbal ; Zhangben Wu ; Bo He ; Ronghai Yu
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：March 25, 2010
• 年：2010
• 卷：114
• 期：11
• 页码：4790-4796
• 全文大小：421K
• 年卷期：v.114,no.11(March 25, 2010)
• ISSN：1932-7455

文摘

Sn_1−xZn_xO₂ nanorods with nanoflower morphology have been synthesized by a solvothermal method. The concentration of Zn dopants is found to play an important role in tuning the morphology, size, and structure of the Sn_1−xZn_xO₂ nanorods. The local structure study through X-ray absorption fine structure spectroscopy reveals that the Zn atoms have successfully substituted for Sn sites in SnO₂ lattice without forming secondary phases. The comparison of experimental X-ray absorption near-edge structure spectra with simulated results shows that the substitutional doping of Zn creates numerous oxygen vacancy and Sn vacancy (V_Sn) defects in the structure. The synthesized nonmagnetic Zn ions doped SnO₂ nanorods exhibit obvious room-temperature ferromagnetism, and their saturated magnetic moment is sensitive to the concentration of Zn dopants. Based on d⁰ ferromagnetism, the observed ferromagnetic ordering of the Sn_1−xZn_xO₂ nanorods could be related to the doping-induced V_Sn defects.