A visible light driven doped TiO2 nanophotocatalyst: Preparation and characterization

International Journal of Nano Dimension

مقاله 4، دوره 5، Issue 4، دی 2014، صفحه 329-335   

نوع مقاله: Reasearch Paper

شناسه دیجیتال (DOI): 10.7508/ijnd.2014.04.003

نویسندگان

S. M. E. Zakeri¹؛ M. Asghari^{* 2}؛ M. Feilizadeh³؛ M. Vosoughi³

¹Separation Processes Research Group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran.

²Energy Research Institute, University of Kashan, Ghotb-e-Ravandi Ave., Kashan, Iran.

³Chemical and petroleum Engineering Deportment, Sharif University of Technology, Tehran, Iran.

چکیده

A useful nanophotocatalyst (La,S-TiO₂) was prepared by a sol-gel method and characterized by UV–vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), photoluminescence emission spectroscopy (PL) and scanning electron microscopy (FESEM). The results showed that the La,S-TiO₂, which calcined at 550 °C, contained only anatase phaseand its crystal size was 23 nm. In addition, the FESEM analysis indicates that the La,S-TiO₂ nano particles with diameter of 20 to 25 nm could have a good dispersion in solution. In order to evaluate of activity of the modified synthesized photocatalyst (La,S-TiO₂), comparison between modified synthesized TiO₂ (La,S-TiO₂) and pure synthesized TiO₂ for degradation of Methyl Orange was investigated. It was found that the modified synthesized photocatalysis (La,S-TiO₂) has much higher photocatalytic activity than undoped TiO₂ for the degradation of contamination.

کلیدواژه‌ها

Nanophotocatalyst؛ La,S-TiO2؛ Methyl orange؛ Contamination؛ Synthesized؛ Sol-gel Method