Ferroelectric LaxFe0.1-x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

LaxFe0.1-x codoped ZnO nanorod arrays have been successfully prepared by the simple hydrothermal method, and the concentration ratio of 1:1 of Fe and La endows the codoped ZnO arrays with optimal ferroelectric properties. Then the ferroelectric La0.05Fe0.05 codoped ZnO nonoarrays and polydimethylsiloxane (PDMS) are used as positive and negative friction materials, respectively, to assemble the triboelectric nanogenerators (TENGs). Compared with Fe- or La-doped ZnO positive friction materials, the La0.05Fe0.05 codoped ZnO positive friction layer increases the output current density of TENGs by nearly 10 times, and the TENGs have excellent output stability. Lastly, the La0.05Fe0.05 codoped ZnO/PDMS TENGs have been successfully used for the high-efficient electrocatalytic degradation of RhB in simulated seawater. The work is very beneficial to the development of self-powered electrochemical degradation of organic pollutants in wastewater.