Abstract
The photoelectrochemical (PEC) performance of TiO2 nano-photoanode films was seriously limited due to week photoresponse, effortless recombination of photogenerated electrons/holes, and instability. In this work, we used narrow bandgap semiconductor CdS quantum dots that decorated TiO2 nanotube arrays to enhance its PEC performance. In addition, ultra-thin transparent grapheme oxide (GO) spreads on the surface of TiO2 photoanode film to avoid its light corrosion and improve the stability. Scanning electron microscope (SEM) images showed that the layer GO is well distributed on the surface of CdS/TiO2 film, and composite film GO/CdS/TiO2 has good PEC stability.
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