Herein, we present a simple yet robust ultrasonication-assisted sequential chemical bath deposition (S-CBD) technique to yield p-type Cu2O nanoparticles on n-type TiO2 NTAs. The photoelectrochemical performance of the resulting Cu2O/TiO2p-n heterojunction composite nanotubes was systematically explored in terms of the amount of Cu2O loaded on TiO2 NTAs under both full spectrum and visible light irradiation. Interestingly, by selecting a proper bias potential, a synergistic effect between electricity and visible lighe irradiation can be reached. Consequently, the photoelectrochemical measurements revealed that Cu2O/TiO2 heterojunction photoelectrodes exhibited a more effective photoconversion capability than TiO2 photoelectrodes alone. Under appropriate loading of Cu2Onanoparticles and bias potential, high photoelectrocatalytic activity of Cu2O/TiO2 composite photoelectrodes was achieved.

Heterojunction semiconductor photoelectrodes with enhanced photoelectrochemical and photoelectrocatalytic activities

247th National Meeting (2014)

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