The Photocatalytic Properties of Br-Doped Titania Nanotube Arrays and its Application in Degradation of Sugar Wastewater

Abstract:

This paper presents a novel approach for preparing titanium dioxide nanotube arrays (TNTs) loaded with highly dispersed Br through an ultrasound aided photochemical route. The content of Br doped on the arrays was controlled by changing the concentration of NaBr and the ultrasound time. The Br doped TiO₂ nanotube arrays were characterized by SEM, XRD and UV–Vis spectrum. Doping the bromine did not basically affect the morphology of the surface of the TNTs, but part of the anatase phase transformed into rutile phase, which led to the formation of the mixed crystal and increased the photocatalytic activity. The results showed that Br doping significantly enhanced the photocatalytic degradation rate of titanium dioxide nanotube arrays under UV-light irradiation. The main factors which affected photocatalytic degradation of sugar wastewater were the illumination time and pH. The results showed that the longer the exposure time was, the initial pH of wastewater was more favorable to photocatalytic degradation of the sugar wastewater for the Br-TiO₂ nanotube arrays, and compared to undoped TiO₂ nanotube arrays Br doped TiO₂ nanotube arrays had better photocatalytic properties.

• Periodical: Advanced Materials Research (Volumes 641-642)
• Pages: 11-17
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.641-642.11
• Online since: January 2013
• Authors: Zhi Peng Meng, Fu Xin Zhong, Dan Yu Wang, Zhong Ming Zhang, Hua Ying Li, Feng Jiao Li
• Keywords: Methyl Orange, Photocatalytic Degradation, Sugar Wastewater, Titania Dioxide Nanotube Arrays

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