One-step hydrothermal preparation of Ta-doped ZnO nanorods for improving decolorization efficiency under visible light
Thi Viet Ha Luu, Ngoc Nhiem Dao, Hoang Ai Le Pham, Quang Bac Nguyen, Van Cuong Nguyen, Huu Phuc Dang
Abstract
eV) of Ta-ZnO150 is higher than that of ZnO150. It is an important factor in enhancing ZnO's photocatalytic efficiency. The MB degradation efficiency of Ta-doped ZnO reached the highest for Ta-ZnO 150 and was 2.5 times higher than ZnO under a halogen lamp (HL). Notably, the influence of hydrothermal temperature on the structural, morphological, and photoelectrochemical properties was discussed in detail. As a result, the optimal hydrothermal temperature for synthesizing the nanorod is 150 °C. Furthermore, photocatalytic experiments were also performed under simulated sunlight and natural sunlight. The nature of the photo-oxidative degradation of MB was also investigated.