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Rapid breakdown anodization to obtain nanostructured TiO2 powders for photocatalytic hydrogen generation

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Abstract

TiO2 is widely used for photocatalytic applications, and several methodologies are employed to obtain nanostructured TiO2 powders with a wide range of morphologies that tune its performance; however, rapid breakdown anodization methodology has been scarcely explored for this purpose, disregarding the impact of processing variables over TiO2 properties and photocatalytic performance. Here, the synthesis of TiO2 nano-powders at different voltages (10, 15, 20 and 25 V) and their performance in the UV-photocatalytic water decomposition for hydrogen generation are reported. SEM images showed that TiO2 powders consisted of uniformly distributed nanoparticles, disregarding the voltage employed for their growth; however, the crystallinity, specific surface area and semiconducting properties were considerably affected. The highest H2 generation rate in a 7-h test was observed for the powders obtained at 20 V, which showed the most negative flat-band potential and the lowest charge-transfer resistance.

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Acknowledgements

Diana Guerrero-Araque gratefully acknowledges the support of a CONACYT scholarship CVU No. 506795. The authors are grateful to project CONACYT-México (270810).

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Authors and Affiliations

  1. Departamento de Química, Universidad Autónoma Metropolitana, Av. San Rafael Atlixco 156, P.C. 09340, Mexico City, Mexico

    Diana Guerrero-Araque, David Ramírez-Ortega & Ricardo Gómez

  2. CONACyT-Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad Legaria, IPN, 11500, Mexico City, Mexico

    Próspero Acevedo-Peña

Authors
  1. Diana Guerrero-Araque
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  2. David Ramírez-Ortega
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  3. Ricardo Gómez
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  4. Próspero Acevedo-Peña
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Correspondence to Próspero Acevedo-Peña.

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Guerrero-Araque, D., Ramírez-Ortega, D., Gómez, R. et al. Rapid breakdown anodization to obtain nanostructured TiO2 powders for photocatalytic hydrogen generation. J Mater Sci: Mater Electron 28, 9859–9866 (2017). https://doi.org/10.1007/s10854-017-6740-x

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  • DOI: https://doi.org/10.1007/s10854-017-6740-x

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