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A simple and efficient ultrasonic-assisted electrochemical approach for scalable production of nitrogen-doped
Nguyen Thi Khanh Van1,2, Nguyen Nang Dinh1, Nguyen Van Chien3
1VNU University of Engineering and Technology, Vietnam National University, Hanoi, 144 Xuan Thuy road, Cau Giay, Hanoi, Vietnam.
Abstract:
In this study, we report a facile and effective approach for large-scale production of nitrogen-doped TiO2nanocrystals (UNTs) by a combination of ultrasonic irradiation and electrochemistry at room temperature using NH4NO3electrolyte as the nitrogen source. The as-prepared UNTs were then characterized by x-ray diffraction, Raman spectroscopy, x-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV-visible diffuse reflectance spectroscopy. The results indicated that the nitrogen content of UNTs reached 9.3% and bandgap energy of 2.62 eV, thus gave the high photocatalytic degradation of methylene blue under visible light irradiation. The mechanism for the formation of UNTs by ultrasonic-assisted electrochemical approach was also proposed.
