Magnetically separable core–shell ZnFe2O4@ZnO nanoparticles for visible light photodegradation of methyl orange

Kulkarni, Suresh D and Kumbar, Sagar and Menon, Samvit G and Choudhari, KS and Santhosh, C (2016) Magnetically separable core–shell ZnFe2O4@ZnO nanoparticles for visible light photodegradation of methyl orange. Materials Research Bulletin, 77. pp. 70-77. ISSN 0025-5408

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Abstract

Visible light photodegradation of aqueous methyl orange using magnetically separable core–shell ZnFe2O4@ZnO nanoparticles is reported. A combination of low temperature (190 �C) microwave synthesis and hydrothermal method were used to prepare phase pure material with excellent yield (95%). The magnetic separability, surface area of 41 m2/g and visible light absorption make ZnFe2O4@ZnO nanoparticles a good solar photocatalyst. ZnFe2O4@ZnO displayed greater UV photocatalytic efficiency than ZnO owing to the generation of large number of electron-hole pairs. Visible light photodegradation of MO using ZnFe2O4@ZnO nanoparticles is reported for the first time. Higher first order rate constants under both UV and visible light for core-shell nanoparticles suggested their superiority over its individual oxides. The ZnFe2O4@ZnO showed excellent reusability with high photocatalytic efficiencies suggesting its suitability for solar photocatalytic applications.

Item Type: Article
Uncontrolled Keywords: Oxides; semiconductivity; chemical synthesis; solvothermal; catalytic properties.
Subjects: Departments at MU > Atomic Molecular Physics
Depositing User: KMC Library
Date Deposited: 05 Feb 2016 08:51
Last Modified: 05 Feb 2016 08:51
URI: http://eprints.manipal.edu/id/eprint/145225

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