Formation of hollow magnetite nanospheres
Анотація
Methods of synthesis of hollow spherical nanosized particles of magnetite have been developed and tested. The general approaches to the formation of such particles with the specified structure and morphology have been determined. The structure, phase and elemental composition, and morphology of the fabricated particles have been studied by X-ray phase structure analysis, Auger-electron spectroscopy, scanning electron microscopy and atomic force microscopy. The magnetic characteristics have been studied by the induction method with a vibration magnetometer. We have found that the methods developed allow us to fabricate the hollow and porous spherical particles of magnetite of 40 nm to 200 nm in diameter with wall thickness of about 1/10 d and narrow diameter distribution.
Посилання
Топохимический маршрут синтеза текстур в форме полых сфер / С.С. Бердоносов, О.И. Бузин, И.В. Мелихов, А.Г. Богданов // Вестн. Московск. ун-та. – М.: Химия, 1998. – Т. 39, № 2. – С. 134.
Пат. № 20020004111 США. (IPC1-7):B32B001/02. Matsubara, Toshiya, Tanaka. Hollow glass microspheres and process for their production. – January 10, 2002. 09/867462.
Пат. № 6225361США. B01J13/22. Nakajima, Takayuki. Expanded hollow micro sphere composite beads and method for their production. – May 1, 2001. 09/544612.
Wanqun Zhang. A simple protocol for bulk synthesis of TiC hollow spheres from carbon nanotubes / Yunle Gu, Luyang Chen, Zhefeng Li, Yitai Qian // Carbon. 2004. – V. 42, № 1. – P. 235 – 238.
Preparation of carbon spheres consisting of amorphous carbon cores and graphene shells / Zhengsong Lou, Qianwang Chen, Jin Gao, Yufeng Zhang // Carbon. – 2004. – V. 42, № 1. – P. 229 – 232.
A room-temperature approach to boron nitride hollow spheres / LY. Chen, Y.L. Gu, L. Shi, Z.H. Yang, et. al. // Solid state commun. – 2004. – V. 130, № 8. – P. 537 –540.
Shiho H., Kawahashi N. Titanium compounds as coatings on polystyrene latices and as hollow spheres // Colloid Polym. Sci. – 2000. – V. 278. – P. 270 – 274.
Synthesis of mesoscopic hollow spheres and inner surface functionalized hollow spheres of titanium dioxide by the liquid phase deposition method / Y. Aoi, H. Kambayashi, E. Kamijo, S. Deki // Mat. Res. – 2003. – V. 18, № 12. – P. 2832 – 2836.
Polyaniline-silica composite conductive capsules and hollow spheres / Zhongwei Niu, Zhenzhong Yang, Zhibing Hu, Yunfeng Lu, C.C. Han // Advanced Functional Materials. – V. 13, № 12. – P. 949 – 954.
Ding H.J., Wang H.M. Discussions on "Radial vibrations of orthotropic laminated hollow spheres" // J. Acoust. Soc. Amer. – V. 115, № 4. – P. 1414 – 1415.
Синтез порожнинних наносфер з оксиду кремнію / П.П. Горбик, І.В. Дубровін, О.А. Співак, М.М. Філоненко, О.О. Чуйко // Наносистеми, наноматеріали, нанотехнології. – 2005. – T. 3, № 3. – С. 653 – 660.
Shouheng Sun, Hao Zeng, David B. Robinson. Monodispersed MFe2O4(M=Fe, Co, Mn) nanoparticles // J. Am. chem. soc. – 2004. – V. 126. – P. 273 – 279.
