Structural and Magnetic Properties of 57Fe-Doped TiO2 and 57Fe/Sn-Codoped TiO2 Prepared by a Soft-Chemical Process

被引：7
作者：
Wang, Yanjie [1 ,2 ]
Nomura, Kiyoshi [3 ]
Liu, Xin [1 ]
Rykov, Alexandre I. [1 ]
Jin, Changzi [1 ]
Liu, Tao [4 ]
Wang, Junhu [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Tokyo Univ Sci, Photocatalysis Int Res Ctr, Noda, Chiba 2788510, Japan
[4] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2016年 / 13-14期
基金：
中国国家自然科学基金;
关键词：
Magnetic properties; Nanoparticles; Iron; Moessbauer spectroscopy; Doping; Titania; ROOM-TEMPERATURE FERROMAGNETISM; OXYGEN VACANCIES; LOCAL-STRUCTURE; FE; MOSSBAUER; SURFACE; DRIVEN;
D O I：
10.1002/ejic.201501173
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A series of Fe-57-doped TiO2 and Fe-57/Sn-codoped TiO2 materials were prepared by a soft-chemical solution process with various Fe-57 concentrations from 0.1 to 1.0 at.-% and a fixed Sn concentration of 2.0 at.-%. In this process, an aqueous H2O2 solution reacts with iron and titanium or iron, tin, and titanium precursor compounds to produce peroxopolymetallic acids. The structures and magnetic properties of the products were characterized by magnetic-moment measurements, X-ray diffraction, and Raman and Mossbauer spectroscopy. The results showed that all samples consisted of a rutile phase (and a trace amount of anatase in Fe-57-TiO2). All samples exhibited hysteresis loops in the M-H curves, which demonstrated the presence of room-temperature ferromagnetism. In addition, their magnetic properties decreased with increasing degree of Fe-57 doping. Oxygen vacancies were considered to be responsible for the presence of ferromagnetism.
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收藏
页码：2131 / 2135
页数：5
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