Amorphous Titania-Coated Magnetite Spherical Nanoparticles: Sonochemical Synthesis and Catalytic Degradation of Nonylphenol Ethoxylate
Sambandam Anandan, Gang-Juan Lee, Shu-Han Hsieh, Muthupandian Ashokkumar, Jerry J Wu
Industrial & Engineering Chemistry Research | AMER CHEMICAL SOC | Published : 2011
Well-defined magnetically separable, amorphous titania-coated magnetite spherical nanoparticles were successfully synthesized by a sonochemical method using 20 kHz ultrasound. Amorphous magnetite particles were generated by the pyrolysis of Fe(CO) within the cavitation bubbles. The simultaneous formation of titania particles from titanium isopropoxide in the bulk liquid led to the incorporation of the magnetite nanoparticles into the titania particles. Transmission electron microscopy images of the titania-coated magnetite nanoparticles showed that they were relatively uniform in size with an average size of ∼150 nm. The M-H hysteresis loop for titania-coated magnetite particles indicated t..View full abstract
Awarded by National Science Council (NSC), Taiwan
The research described herein was financially supported by the National Science Council (NSC), Taiwan, under Contract 98-2221-E-35-12-MY3. S.A. thanks Feng Chia University, Taiwan, for the Visiting Professor appointment during May-June 2010. The authors thank Dr. R Justin Joseyphys, Department of Physics, NIT, Trichy, India, for Langevin fit analysis.