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- Title
Rapid breakdown anodization to obtain nanostructured TiO powders for photocatalytic hydrogen generation.
- Authors
Guerrero-Araque, Diana; Ramírez-Ortega, David; Gómez, Ricardo; Acevedo-Peña, Próspero
- Abstract
TiO is widely used for photocatalytic applications, and several methodologies are employed to obtain nanostructured TiO 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 TiO properties and photocatalytic performance. Here, the synthesis of TiO 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 TiO 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 H 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.
- Subjects
TITANIUM oxides; PHOTOCATALYTIC oxidation; ANODIC oxidation of metals; ALLOY powders; ULTRAVIOLET water treatment
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 13, p9859
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-6740-x