Photoenhanced degradation of rhodamine blue on monometallic gold (Au) loaded brookite titania photocatalysts activated by visible light
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- Osei Bonsu, P., Lü, X., Xie, J. et al. Reac Kinet Mech Cat (2012) 107: 487. doi:10.1007/s11144-012-0493-6
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Brookite titania nanomaterials modified with gold nanoparticles (NPs) Au–TiO2 were prepared in this research. The photocatalytic activity of the prepared composite was assessed by the photodegradation of organic pollutants. Rhodamine blue was used as a model organic pollutant. The study determined the optimum loading ratio of Au/Ti, which will result in the best photodegradation efficiency. Also, the photocatalytic activity of gold loaded brookite titania nanomaterials was ascertained under visible light. The hydrothermal method was used to prepare brookite titania whiles, gold NPs were loaded on its surface by consecutive ion adsorption and photoreduction. The results revealed that the sample Au–TiO2 (Au/Ti = 2 % molar ratio) had the best photocatalytic degradation efficiency of 100 % after 2 h of irradiation under visible light and was also higher than commercial P25.