Structural characterization and photocatalytic activity of B2O3/ZrO2–TiO2 mesoporous fibers

The formation of B2O3/ZrO2–TiO2 mesoporous fibers using mixed precursor solutions were achieved without any templates by dry-spinning method with novel steam heat-treatment. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), N2 adsorption, UV–vis diffuse reflectance and Fourier transformation infrared (FTIR) spectroscopy. Although calcination at 800 °C, the mesoporous fibers exhibit higher surface area (∼80 m2/g) than pure ZrO2–TiO2 fibers and the only ZrTiO4 phase was observed. The pyridine adsorption on ZrO2–TiO2 sample indicates the presence of stronger surface acid sites. Such properties bring about that the mesoporous oxide system possesses higher efficiency and durable activity stability for photodegradation of methyl orange and phenol than P25 TiO2. In addition, the macroscopic paper form for the resulting materials is more beneficial for practical applications than traditional catalysts forms.

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► The B2O3/ZrO2–TiO2 mesoporous fibers using mixed precursor solutions were achieved by dry-spinning method with steam treatments.
► The introduction of B2O3 endows the mesoporous fibers with higher surface area and stronger surface acid sites.
► The macroscopic paper is fabricated by a conventional paper-making process and can be manipulated more easily in practical applications than the forms of powder and film.