Photocatalytic Degradation of Methyl Orange by TiO₂/Schorl Photocatalyst: Affecting Parameters

Abstract:

In situ growth of TiO₂ nanocrystals on the surface of schorl was realized via Sol-Gel method in this work. The obtained TiO₂/schorl composite photocatalysts were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An active dye, Methyl Orange (MO), was used to evaluate the photocatalytic activity of TiO₂/schorl composite photocatalyst. The effect of sintering temperature and time on the photocatalytic activity of TiO₂/schorl was emphasized in this work. XRD results indicated that TiO₂ existed in the form of anatase only when the temperature was less than 550°C, and the sintering time was less than 2.5h. Higher sintering temperature and longer sintering time could impel the appearance of rutile phase. SEM observations revealed that the nanosized particles of TiO₂ were well dispersed and immobilized on the surface of schorl. The optimum preparation conditions of TiO₂/schorl composite with best photocatalytic activity were that sintering temperature was 550°C and sintering time was 2.5h.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 2785-2788
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.2785
• Online since: January 2015
• Authors: Huan Yan Xu*, Xue Li, Yan Li, Ping Li, Wei Chao Liu
• Keywords: Methyl Orange, Photocatalysis, Schorl, TiO₂

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