[The preparation of NiFe2O4 composite nanoparticles and spectral properties].
The composite nanoparticles of Ni-ferrite with coated gelatin were prepared with the gel-microemulsion chemical tailoring method. The gelatin FeCl2 and NiCl2 were used to prepare gel, which was tailored to be particles in micellar of microemulsion, and the particles were reduced, compounded and nucleated. Surveying by XRD, TEM, IR and EDS showed that the particles formed were coated by gelatin protein and their mean sizes are in the range of 10-100 nm, and particle sizes are 3.3-4.6 nm. There are about 3-22 NiFe2O4 particles on each spheroid. The measurement of magnetic parameters indicated that the specific saturation magnetization was sigma(s) = 36.31 x 10(3)/4pi(A x m(-1) x g(-1)), coercivity was H(c) = 6750 A x m(-1), and residual magnetism B(r) = 4.39 x 10(3)/4pi(A x m(-1) x g(-1)).
Zhu
Huai-wu
HW
Department of Chemistry, Guizhou Normal University, Guiyang 550025, China.
Zhang
Chao-ping
CP
D003460:Crystallization; D005290:Ferric Compounds / Q000737:chemistry*; D008280:Magnetics; D013058:Mass Spectrometry / Q000379:methods; D008422:Materials Testing / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures; D009532:Nickel / Q000737:chemistry; D010316:Particle Size; D010777:Photochemistry / Q000379:methods; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
D005290:Ferric Compounds; C001215:ferrite; D009532:Nickel; D014025:Titanium