3D Co3O4@MnO2 heterostructures grown on a flexible substrate and their applications in supercapacitor electrodes and photocatalysts.

In this work, flexible 3D Co3O4@MnO2 heterostructures have been successfully obtained without using any surfactants. The as-prepared flexible electrodes exhibit high efficiency, high discharge areal capacitance (1397.2 mF cm-2 at 1 mA cm-2), long cycle life (13.9% loss after 6000 repetitive cycles at 1 mA cm-2) and excellent electrical stability. In addition, hybrid 3D Co3O4@MnO2 structures are also used as photocatalysts for the photocatalytic degradation of several harmful organic dyes under visible light illumination. The results show that the as-grown products possess excellent photocatalytic performance, demonstrating their potential applications in wastewater treatment.