Enhancement of visible light photoelectrocatalytic activity of ZnO(core)/TiO2(shell) composite by N-doping and decorating with Au0 nanoparticles

•ZnO/TiO2 core-shell composites were N-doped and decorated with Au0 nanoparticles.•Photoelectrocatalytic activity of ZnO/TiO2/Au(NPs) under visible light is demonstrated.•Active products of O2 electroreduction are involved in photodegradation of methylene blue.•Application of potential eliminates un...

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