Sonochemical Synthesis of Mg-TiO2 nanoparticles for persistent Congo red dye degradation

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 346; pp. 559 - 569
• Main Authors: Bhagwat, Ujwala O., Wu, Jerry J., Asiri, Abdullah M., Anandan, Sambandam
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2017
• Subjects: Congo red; Mg-TiO2; Photocatalyst; Photodegradation; Sonochemical; Photodegradation; Congo red; Sonochemical; Photocatalyst; Mg-TiO2
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2017.06.043

[Display omitted] •Mg-TiO2 nanoparticles with high surface area were prepared by the simplistic sonochemical method.•The absorption range of TiO2 nanoparticles was extended towards visible region due to Magnesium doping.•The photocatalytic activity of Mg-TiO2 nanoparticles is nearly 2 times higher than that of TiO2 (P25).•Added oxidants also enhance the photocatalytic activities of Mg-TiO2. In this article, modified TiO2 and Mg-TiO2 nanoparticles was prepared by the facile sonochemical method. The crystal structure evolution and elemental composition were analyzed by X-ray crystallography and X-ray photoelectron spectroscopy. The calculated band gap energy of Mg-TiO2 nanoparticles was lower than that of pure TiO2 −P25. The Fourier Transform Infrared (FT-IR) spectral study established the substitution of Mg2+ on the TiO2 surface. The Raman spectroscopy confirms that the Mg2+ ions were in situ doped on the surface of TiO2 nanoparticles. The photocatalytic efficiency of the synthesized Mg-TiO2-P25 nanoparticles was investigated by performing photocatalytic degradation of persistent Congo red dye under visible light irradiation. It has been found that the Mg-TiO2-P25 nanoparticles possess better catalytic activity than pure TiO2 −P25 and modified TiO2 nanoparticles.