Photodegradation of Methylene Blue over Cr Doped TiO₂ and Cr Doped TiO₂ Supported TUD-1 Photocatalysts

Abstract:

A series of visible light driven photocatalysts of Cr-doped TiO₂ and Cr-doped TiO₂ supported on TUD-1 have been successfully synthesized via surfactant-free sol-gel method followed by wet impregnation procedure. XRD analysis revealed that both anatase and rutile phases existed in Cr-doped TiO₂ samples. After loading onto TUD-1, both Ti and Cr were incorporated in the highly porous siliceous matrix. As observed, more tetrahedrally coordinated Ti species was formed in Cr-doped TiO₂ after supporting onto TUD-1. The photocatalytic performance of the synthesized materials was tested in the photodegradation of Methylene Blue under visible light irradiation. Results showed that 2.5 mol% Cr dopant gave the highest photocatytic activity to TiO₂ in dye photodegradation. Besides, all the 2.5Cr-TiO₂ supported on TUD-1 materials had higher photocatalytic activity than that of 2.5Cr-TiO₂. Among the materials prepared, 2.5Cr-TiO₂/30TUD-1 appeared as the most superior photocatalyst which gave the highest dye photodegradation of 75%.

• Periodical: Advanced Materials Research (Volume 1109)
• Pages: 424-428
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1109.424
• Online since: June 2015
• Authors: Yee Khai Ooi, Leny Yuliati, Siew Ling Lee*
• Keywords: Chromium, Photdegradation, Photocatalyst, Titania, TUD-1

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