Yuan, Junjie and Zhou, Tian and Pu, Hongting (2010) Nano-sized silica hollow spheres: preparation, mechanism analysis and its water retention property. Journal of the Physics and Chemistry of Solids . ISSN 0022-3697
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In this article, synthesis of nano-sized silica hollow spheres applying positive charged polystyrene as sacrificial templates was introduced. Firstly, nano-sized polystyrene particles were synthesized by emulsifier-free emulsion polymerization under solvothermal condition. Secondly, silica hollow nanospheres were formed through a simultaneous `coating-etching' process. PVP played a key role in the evolution of nano-sized hollow spheres even if the templates were positive charged and the formation mechanism was different from that of previous studies. TEM results revealed that the morphologies of nano-sized silica hollow spheres not only strongly relied on the amount of reactant, but also the sequence of adding them. TGA illustrated that the interiors of nano-sized silica hollow spheres were not completely `hollow'. Brunauer-Emmett-Teller (BET) analysis showed that this material had a specific area of 399 m2/g. The water retention property of the materials was also investigated.
|Subjects:||Material Science > Nanochemistry|
|Deposited On:||28 Oct 2010 10:34|
|Last Modified:||28 Oct 2010 10:34|
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