access icon free Preparation of hollow cone-like ZnO/CoFe2O4 heterostructures and their photocatalytic properties

Heterostructures of hollow cone-like ZnO/CoFe2O4 nanocomposites (NPs) are successfully fabricated by a two-step hydrothermal route with the assistance of Si substrate as the template. The material structure, composition, morphology as well as the magnetic property have been investigated via scanning electron microscopy, transmission electron microscopy, an X-ray diffractometer and a vibrating sample magnetometer. Photocatalytic performance was also examined. The NPs have a bone-structure of ZnO coated with CoFe2O4 NPs, which have a cone-like feature with a diameter of 200–300 nm and 200 nm in the hole with a large surface-to-volume ratio. It is the special heterostructures that bring about a novel high surface area leading to highly efficient photo-degradation in visible light and recyclability because of ferromagnetism. The degradation of tetracycline of NPs reaches 81.03% in 120 min.

Inspec keywords: drugs; nanofabrication; surface composition; wide band gap semiconductors; cobalt compounds; semiconductor-insulator boundaries; surface morphology; catalysts; zinc compounds; transmission electron microscopy; nanomagnetics; X-ray diffraction; photochemistry; surface magnetism; catalysis; nanocomposites; II-VI semiconductors; ferromagnetic materials; scanning electron microscopy

Other keywords: cone-like feature; time 120 min; size 200 nm to 300 nm; hollow cone-like heterostructures; magnetic property; visible light; Si substrate; morphology; material structure; Si; recyclability; composition; ferromagnetism; two-step hydrothermal route; tetracycline degradation; nanocomposites; X-ray diffractometer; ZnO-CoFe2O4; bone structure; vibrating sample magnetometer; transmission electron microscopy; surface-to-volume ratio; photodegradation; photocatalytic properties; scanning electron microscopy

Subjects: Other methods of nanofabrication; Ferromagnetism of nonmetals; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Magnetic properties of nanostructures; Magnetism in interface structures; Photochemistry and radiation chemistry; Amorphous and nanostructured magnetic materials; Surface magnetism; Solid surface structure; Heterogeneous catalysis at surfaces and other surface reactions

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2014.0586
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