The preparation of CuS/TiO_2 nanotube arrays with high-active under visible light by ultrasonic-assisted hydrothermal method

摘要

Ultrasound provided a good dispersion of CuS on TiO_2NTs. In order to prepare CuS/TiO_2NTs with a good heterostructure, the CuS particles must establish contact with TiO_2NTs uniformly. The hydrothermal process was divided into two phases, and different times of ultrasound were introduced before each stage. The effects of ultrasonic-assisted hydrothermal method on the structure and photoelectric properties of CuS/TiO_2NTs were investigated by SEM, XRD, photocurrent, and degradation of MB. The results show that the introduction of ultrasound before the hydrothermal treatment can cause damage to the TiO_2NTs. However, the ultrasound between the two hydrothermal stages makes CuS distributed in the TiO_2NTs uniformly, and the amount of CuS can be increased. The photocurrent reaches 32 mA/cm~2 at 1.5 V, and meanwhile the photo-catalytic activity under visible light is also improved.