Abstract
The present research focuses on the comparative investigation of the acid–base surface properties (the isoelectric point, pHiep and point of zero charge, pHpzc) of one-dimensional TiO2 nanomaterials. Different one-dimensional TiO2 nanomaterials, nanotubes (NTs) and nanowires (NWs) were prepared by an alkaline hydrothermal synthesis procedure. The structural properties of the synthesized TiO2 nanomaterials were investigated with high-resolution scanning electron microscopy (HR-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), atomic force microscopy (AFM), powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The NWs and NTs were characterized using Raman and Fourier transform infrared (FT-IR) spectroscopy as well as Brunauer–Emmett–Teller (BET) measurements. Surface properties, i.e. pHiep and pHpzc of NWs and NTs were determined from electrokinetic measurements, potentiometric mass and electrolyte titrations. The relative acidity ...
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