The influence of the morphology of 1D TiO2 nanostructures on photogeneration of reactive oxygen species and enhanced photocatalytic activity
作者： Maibelin Rosales , Tamara Zoltan , Ciro Yadarola , Edgar Mosquera , Francisco Gracia
DOI: 10.1016/J.MOLLIQ.2019.02.070
关键词:
摘要: Abstract The influence of morphology in one-dimensional (1D) TiO2 nanostructures—specifically nanotubes (TNT), nanofibers (TNF), nanorods (TNR), and nanowires (TNW)—on the photogeneration reactive oxygen species (ROS) resulting effect on photocatalytic activity were investigated. 1D nanostructures obtained by hydrothermal route, employing changes crystalline phase precursor reaction temperature as morphology-controlling factors. Morphological, structural, textural, optical properties studied using scanning transmission electron microscopy, X-ray diffraction, BET surface area analysis, diffuse reflectance photoluminescence spectroscopy. photochemical behaviour these was evaluated through ROS quantification including 1O2 OH, it found that TNF exhibits highest amount generated ROS, following tendency observed: TNF > TNT > TNR > TNW. In addition, for degrading methyl orange (MO) under visible light studied, a similar found. results showed more intense emission spectra signal TNF, suggesting higher concentration superficial defects associated with vacancies (Ov), same trend Ov established. Finally, correlation between morphology, well determined. suggest each material act active sites improve production activity. These unveiled generation is mainly dependent type nanostructures, significantly affecting nanomaterial.
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