Magnetic and photocatalytic properties of n- and p-type ZnFe2O4 particles synthesized using ultrasonic spray pyrolysis

Takanori NUNOME; Hiroshi IRIE; Naonori SAKAMOTO; Osamu SAKURAI; Kazuo SHINOZAKI; Hisao SUZUKI; Naoki WAKIYA

doi:10.2109/jcersj2.121.26

Feature: Ceramics Processing through Energy Consumption Reduction (Green Processing): Papers

Magnetic and photocatalytic properties of n- and p-type ZnFe₂O₄ particles synthesized using ultrasonic spray pyrolysis

Takanori NUNOME, Hiroshi IRIE, Naonori SAKAMOTO, Osamu SAKURAI, Kazuo SHINOZAKI, Hisao SUZUKI, Naoki WAKIYA

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Keywords: Magnetically separable photocatalyst, Zinc ferrite, Semiconductor, Particles

JOURNAL FREE ACCESS

2013 Volume 121 Issue 1409 Pages 26-30

DOI https://doi.org/10.2109/jcersj2.121.26

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Abstract

In the equilibrium state, although ZnFe₂O₄ is paramagnetic, it is known that its magnetic property can be modified under nonequilibrium perturbations such as rapid cooling. Ultrasonic spray pyrolysis is a kinetic process involving rapid cooling. In this work, ferrimagnetic ZnFe₂O₄ particles were synthesized successfully. Furthermore, by changing the carrier gas, p-type and n-type ZnFe₂O₄ particles were synthesized. The p-type ZnFe₂O₄ showed low photocatalytic activity, but n-type ZnFe₂O₄ showed considerably strong activity against UV light. Recently, synthesis of magnetically separable photocatalyst has been developed with hybrid or composite of ferrite and TiO₂. The fact that our ZnFe₂O₄ particles show both ferrimagnetic and photocatalytic properties indicates that this material will present new vistas as a magnetically separable photocatalyst.

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