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Self-Cleaning Activity on Concrete Surfaces Coated with Fe- and S-Doped TiO2 Synthesized by Sol–Gel Microwave Method

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Fe- and S-doped TiO2 and pure TiO2 nanostructures were synthetized through the sol–gel microwave assisted method and deposited on the concrete specimens surface by soaking it in a catalyst suspension. Characterization by several techniques (X-ray diffraction (XRD), Scanning Electronic Microscopy (SEM), and Transmission Electronic Microscopy (TEM)) indicates that the TiO2 modified concrete surface consist of TiO2 anatase nanoparticles located on the external substrate surface. The photocatalytic behavior of these samples was evaluated in the photodegradation of cranberry-grape juice satins carried out under visible light irradiation. An important enhancement in the photocatalytic activity of the doped TiO2 modified concrete surface with respect to un-doped TiO2 modified concrete surface sample was observed. The highest activity of the S:TiO2 modified concrete surface sample was explained as due to the modification in the conduction band and light absorption ability of anatase surface exposure with respect to the other photocatalysts.
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Keywords: Concrete Surfaces; Fe:TiO2; Microwave Radiation; S:TiO2; Self-Cleaning Activity

Document Type: Research Article

Affiliations: 1: Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las campanas, C.P. 76010, Santiago de Querétaro, Qro., México 2: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, A.P. 1-1010 Querétaro, Querétaro, C.P. 7600, México 3: Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Parque, Tecnológico Querétaro Sanfandila, Pedro Escobedo 76703, Querétaro, México

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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