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Hierarchically branched MoO 3 nanostructures on Ti substrates were successfully prepared via a simple and controllable electrodeposition-heat-treatment method. XPS and Raman results indicate that these branched MoO 3 nanostructures possess some oxygen vacancies. The magnetic measurements show the prepared branched MoO 3 nanostructures exhibit ferromagnetic behaviour at room temperature. The observed room-temperature ferromagnetism can be mainly ascribed to the oxygen vacancies on the surface of the samples.

In this study, we have adopted a one-step hydrothermal route to synthesize an interesting type of Bi2O2CO3 hierarchical nanotubes well-orderedly self-assembled from nanosheets. The effects of reaction time on the...