Nitrogen doped TiO2 for efficient visible light photocatalytic dye degradation

Iranian Journal of Catalysis

مقاله 6، دوره 9، شماره 3، آذر 2019، صفحه 233-239   

نوع مقاله: Articles

نویسندگان

Jila Talat-Mehrabad^{* 1}؛ Mohammad Partovi²؛ Farzad Arjomandi Rad¹؛ Rana Khalilnezhad³

¹Department of Chemistry, Bonab Branch, Islamic Azad University, Bonab, Iran.

²Department of Chemical, Faculty of Engineering, Tehran North Branch, Islamic Azad University, Tehran, Iran.

³Department of Chemistry, Islamic Azad University Tehran North Branch, Tehran, Iran.

چکیده

In this study, Nitrogen doped TiO₂ photocatalysts were prepared by the sol gel method and physicochemical properties were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM), photoluminescence, and energy dispersive X-ray spectroscopy (DRS) techniques. The XRD data indicated that the nanoparticles had the same crystals structures as the pure TiO₂. Photocatalytic properties of the nitrogen doped TiO₂ nanocatalyst and pure TiO₂ were compared for degradation of Blue 5 dye in visible light irradiation and the DRS results showed that the band gap of doped photocatalyst was smaller than that of the undoped TiO₂ and there was a shift in the absorption band toward the visible light region. The Photocatalytic properties of the nitrogen doped TiO₂ nanocatalyst wereemployed for degradation of crystal Blue 5 dye under visible light irradiation. The effects of pH, amount of photocatalysts,catalyst dosage, and dye concentration were also examined. The best results were reported for the concentration of 20 mg/L N-TiO₂ nano-particles. Also results showed that the photodecomposition of N-TiO₂ is complete at pH 11. Total organic carbon (TOC) analysis indicated 30 % mineralization of Blue 5 after 75 min irradiation.

کلیدواژه‌ها

Photocatalysis؛ nanoparticles؛ Nitrogen doped TiO2؛ Degradation؛ Blue 5 dye

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