Xiao C.,Yangzhou University |
Xiao C.,Jiangsu Province Key Laboratory of Environmental Material and Environmental Engineering |
Wu R.,Yangzhou University |
Wu R.,Jiangsu Province Key Laboratory of Environmental Material and Environmental Engineering |
And 7 more authors.
Xiyou Jinshu/Chinese Journal of Rare Metals
Sm3+ doped titanium dioxide nanoparticles (Sm-TiO2) were prepared by sol-gel combined hydrothermal method. And the Sm-TiO2 particles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the incorporation of Sm3+ did preserve the anatase crystal form of TiO2, and there was no other crystal type. The size of the Sm-TiO2 nanoparticles was about 8~13 nm. The nano-electrorheological fluid (n-ERF) was a kind of suspension system with Sm-TiO2 particles dispersed in the silicone oil. The formation of the n-ERF with chloroform as the medium had excellent anti-sedimentation stability. The dynamic electrorheological responses test by rotary rheometer showed that the dynamic modulus of n-ERF increased with the increase of electric field strength, and so did the linear viscoelastic zone, which could be explained by the polarization theory. When the doping concentration of Sm3+ was 0.05, n-ERF showed the most outstanding performance of the dynamic electrotheological responses. Source
Wang F.,Yangzhou University |
Wang F.,Jiangsu Province Key Laboratory of Environmental Material and Environmental Engineering |
Wang Z.,Yangzhou University |
Wang Z.,Jiangsu Province Key Laboratory of Environmental Material and Environmental Engineering |
And 7 more authors.
Journal of Rare Earths
Monodisperse and single-phase cerium oxide nanopowders were synthesized by mixed solvothermal route, Ce(NO3)3·6H2O as raw materials, poly (vinylpyrrolidone) (PVP) as stable agent. The cerium oxide nanopowders could be controlled from 50 to 60 nm by adjusting the ratio between ethanol absolute and water at 160 °C. With methanol instead of ethanol absolute, the reaction temperature could be lowered to 130 °C. © 2010 The Chinese Society of Rare Earths. Source