Preparation and photoelectrocatalytic activity of CdS particles embedded in highly ordered TiO_2 nanotube arrays electrode for HCB degradation

摘要

Photoelectrocatalytic degradation performance of hexachlorobenzene (HCB) was assessed with a newly designed continuous photocatalytic reactor. CdS/TiO_2 NTs were successfully prepared by depositing CdS particles on the surface of TiO_2 nanotube arrays. The morphology, phase structure and photoelectric properties of CdS/TiO_2 NTs were characterized by field emission scanning electron microscope, X-ray diffraction and diffuse reflectance spectroscopy. The photoelectrocatalytic activity of CdS/TiO_2 NTs was evaluated in degradation of HCB in aqueous solution. The experimental results show that CdS/TiO_2 NTs exhibited higher photoabsorption rate under visible light, bigger photocurrent (value) and improved photocatalytic activity than TiO_2 NTs.