Photocatalytic property of ZnO microrods modified by Cu2O nanocrystals

The ZnO microrods modified by Cu2O nanocrystals were prepared in aqueous solution. ZnO microrods acted as carrier to immobilize the Cu2O nanocrystals and improved the recovery rate from solution. The ZnO/Cu2O compounds promoted the separation of photo-induced electrons and holes, which was proved by surface photovoltage spectroscopy (SPS). Therefore, the compounds showed an enhanced photocatalytic activity than pure ZnO and pure Cu2O under both UV–vis light and visible light.

Figure optionsDownload as PowerPoint slideHighlights
► We obtained Cu2O nanocrystals coupled with single ZnO microcrystal.
► ZnO microrods could immobilize Cu2O nanocrystals and improve recovery rate.
► ZnO working as carrier has good photocatalytic activity under UV–vis light.
► The ZnO/Cu2O compounds promoted separation of electrons and holes.