The effect of anatase crystal orientation on the photoelectrochemical performance of anodic TiO2 nanotubes
Por:
Acevedo-Peña P., González F., González G., González I.
Publicada:
1 ene 2014
Resumen:
TiO2 nanotube films were prepared by anodizing Ti plates in ethylene glycol based electrolytes containing variable concentrations of ammonium fluoride and water. The morphology, optical and semiconducting properties, as well as the composition of TiO2 films were shown to be dependent on the anodizing bath composition. Among different film properties, only the preferential orientation of anatase crystals, quantified with the texture coefficient of the (004) plane, TC(004), showed the same dependence of photoelectrochemical performance on the electrolyte composition. The increased value of TC(004) was related to anatase crystals piling up in the [001] direction (normal to the plane of the Ti substrate), forming a fiber like texture structure along the tube that facilitates the transport of photogenerated electrons toward the conducting substrate. © the Owner Societies.
Filiaciones:
Acevedo-Peña P.:
Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186. Col. Vicentina, Ciudad de México, 09340, Mexico
González F.:
Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186. Col. Vicentina, Ciudad de México, 09340, Mexico
González G.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad De Mexico, DF, Mexico
González I.:
Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186. Col. Vicentina, Ciudad de México, 09340, Mexico
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