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HomeMaterials Science ForumMaterials Science Forum Vol. 756Sonochemical Synthesis of Silica Coated Super...

Sonochemical Synthesis of Silica Coated Super Paramagnetic Iron Oxide Nanoparticles

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Abstract:

Superparamagnetic iron oxide nanoparticles (SPION) of sizes 5 to10 nm were synthesized by the co-precipitation method. They are coated with silica nanoparticles using sonication method. The SPION was produced under the optimum pH of 10, peptized in acidic medium and redispersed in water. The silica nanoparticles were produced through the Stöbermethod. Sonochemical coating of silica nanoparticle on the SPION was successfulat a pH value lower than 5. Otherwise, at higher pH value (but lower than point zero charge (PZC)), the SPION were found to be unstable. Fast hydrolysis of triethoxyvinylsilane(TEVS) shows that silica forms its own particles without coating onto the surfaces of the SPION. Under optimized experimental condition, sonochemical method of coating silica nanoparticles onto the SPION can be considered as an alternative for effective and prompt method that rely mainly on pH of the suspension.

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ISESCO Conference on Nanomaterials and Applications 2012

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Periodical:

Materials Science Forum (Volume 756)

Pages:

74-79

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.756.74

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Online since:

May 2013

Authors:

Bashiru Kayode Sodipo, Azlan Abdul Aziz

Keywords:

pH, Point Zero Charge, Silica Nanoparticles, Sonochemical, SPION

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