Electrodeposition of polyhedral Cu2O on TiO2 nanotube arrays for enhancing visible light photocatalytic performance

Nano-sized polyhedral crystalline Cu2O was evenly loaded throughout the structure of TiO2 nanotube arrays (TNTs) using an electrodeposition method, which resulted in a nanocomposite namely Cu2O/TNTs. The content of Cu2O loaded on the arrays was controlled by varying the electrodeposition charges. Under visible light, the photocurrent for water splitting and photocatalytic decolorization efficiency of dye Acid orange II (AO-II) of the Cu2O/TNTs obtained with the deposition charges of 500 mC were about 35 and 18 times that of TNTs, respectively. The polyhedral Cu2O/TNTs would be a promising material for solar energy conversion and organic pollutant degradation.

The content and size of Cu2O loaded on the TiO2 nanotube arrays were controlled by the electrodeposition charges. The as-prepared Cu2O/TNTs-500 exhibited excellent photoelectrochemical property and photocatalytic activity under visible light.Figure optionsDownload as PowerPoint slideResearch highlights
► The polyhedral Cu2O nanocrystalline is evenly loaded on the TiO2 nanotube arrays(TNTs).
► The content and size of Cu2O loaded can be controlled by the electrodeposition charges.
► The Cu2O/TNTs exhibit an excellent photoelectrochemical property under visible light.