SYNTHESIS OF SrTi1–(X+Y)MOXVYO3 AND ITS PHOTOCATALYTIC ACTIVITIES OF UNDER VISIBLE LIGHT IRRADIATION

• Main Authors: Phan, T.-Que Phuong, Pham, Sy-Nguyen, Le, Minh-Vien
• Other Authors: Advanced Technologies for IoT Applications
• Format: Conference paper
• Language: English
• Published: 2019
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/67095
• Institution: Vietnam National University, Hanoi

Single–phase perovskite strontium titanate SrTiO3 was synthesized from strontium nitrate and tetra–n–butyl orthotitanate using sol–gel method with various calcined temperature from 600–900 °C. Prepared catalysts were characterized by X–ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet–visible diffuse reflection spectroscopy (UV–DRS). The result showed that SrTiO3, which was synthesized at 700 °C in 6 hours, possessed the efficiency of 59.9 % regarding photocatalytic activity for the 10 ppm methylene blue degradation under visible (λ = 390 ÷ 750 nm). Furthermore, the results indicated that the doping of M (M = Mo, V) into the structure SrTiO3(SrTi1-(x+y)MoxVyO3) increased the degradation efficiency in comparison with that of the undoped SrTiO3. As a result, the presence of Mo, V contributed to the decrease of band-gap energy and enhanced simultaneously the photocatalytic activity of SrTiO3