Sol-gel synthesis and characterization of magnetic TiO2 microspheres

被引：15
|
作者：
Li, Zhixia [1 ]
Kawashita, Masakazu [1 ]
Doi, Masaaki [2 ]
机构：
[1] Tohoku Univ, Grad Sch Biomed Engn, Dept Biomed Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Elect Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2010年 / 118卷 / 1378期
关键词：
gamma-Fe2O3; nanoparticle; TiO2; Microsphere; Sol-gel method; Magnetic property; Hyperthermia; HYPERTHERMIC TREATMENT; CATIONIC LIPOSOMES; TITANIUM-OXIDE; CANCER; NANOPARTICLES; TRANSFORMATION; PARTICLES; COATINGS; COMPLEX; PACKING;
D O I：
10.2109/jcersj2.118.467
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We tried to prepare magnetic TiO2 microspheres as thermoseeds for hyperthermia of cancer by a sol gel process from titanium tetraisopropoxide (TTIP) in a water-in-oil emulsion. The microspheres were prepared by the addition of diethanolamine (DEA) as stabilizer, methanol (CH3OH) as dispersant and colloidal gamma-Fe2O3 nanoparticles as origin of magnetization. The gamma-Fe2O3 nanoparticles were prepared by an oxidation precipitation method in FeCl2-NaNO3-NaOH system. The diameter of microsphere was controlled by optimizing preparation conditions, i.e., molecular ratio of reactants and stirring speed. Mono-dispersed magnetic TiO2 microspheres 10-30 mu m in diameter were sucessfully obtained by adding a certain amount of water phase with the molar ratio of TTIP/DEA/CH3OH/H2O = 1:1.7:7:22 into kerosene with surfactant (sorbitan monooleate/sorbitan monostearate = 3:1 in weight ratio) 16 wt % of the total amount of oil phase. They contained up to 26.7 wt gamma-Fe2O3 and their saturation magnetization and coercive force were 20.4 Am-2/kg and 10 kA/m, respectively. (C) 2010 The Ceramic Society of Japan. All rights reserved
引用
收藏
页码：467 / 473
页数：7
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