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Synthesis of bicrystalline TiO2 supported sepiolite fibers and their photocatalytic activity for degradation of gaseous formaldehyde
Abstract Bicrystalline TiO2 supported acid activated sepiolite (TiO2/AAS) fibers have been successfully synthesized by a simple method at low temperature. The as-prepared TiO2/AAS composites were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption method, UV–vis diffuse reflectance spectrum (UV–vis DRS), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared (FT-IR) spectroscopy. The X-ray diffraction analysis indicates that the binary mixtures of anatase and rutile exist in the TiO2/AAS composites. The specific surface area of the TiO2/AAS composites is much larger than that of raw sepiolite and acid activated sepiolite (AAS) fibers. The photocatalytic activities of the TiO2/AAS composites were evaluated by the degradation of gaseous formaldehyde (a main indoor air pollutant) under UV light irradiation. The result indicates that the photocatalytic activity of the TiO2/AAS composites is excellent and superior to that of the TiO2/sepiolite (raw sepiolite) and pure TiO2. The high photocatalytic activity of the TiO2/AAS composites can be attributed to the anatase–rutile mixed phase and bimodal pore structure in the TiO2/AAS composites.
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Highlights TiO2 supported acid activated sepiolite fiber was synthesized by a simple method. The catalyst showed excellent photocatalytic activity under UV light irradiation. The catalyst shows good stability after five photocatalytic degradation cycles.
Synthesis of bicrystalline TiO2 supported sepiolite fibers and their photocatalytic activity for degradation of gaseous formaldehyde
Abstract Bicrystalline TiO2 supported acid activated sepiolite (TiO2/AAS) fibers have been successfully synthesized by a simple method at low temperature. The as-prepared TiO2/AAS composites were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption method, UV–vis diffuse reflectance spectrum (UV–vis DRS), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared (FT-IR) spectroscopy. The X-ray diffraction analysis indicates that the binary mixtures of anatase and rutile exist in the TiO2/AAS composites. The specific surface area of the TiO2/AAS composites is much larger than that of raw sepiolite and acid activated sepiolite (AAS) fibers. The photocatalytic activities of the TiO2/AAS composites were evaluated by the degradation of gaseous formaldehyde (a main indoor air pollutant) under UV light irradiation. The result indicates that the photocatalytic activity of the TiO2/AAS composites is excellent and superior to that of the TiO2/sepiolite (raw sepiolite) and pure TiO2. The high photocatalytic activity of the TiO2/AAS composites can be attributed to the anatase–rutile mixed phase and bimodal pore structure in the TiO2/AAS composites.
Graphical abstract Display Omitted
Highlights TiO2 supported acid activated sepiolite fiber was synthesized by a simple method. The catalyst showed excellent photocatalytic activity under UV light irradiation. The catalyst shows good stability after five photocatalytic degradation cycles.
Synthesis of bicrystalline TiO2 supported sepiolite fibers and their photocatalytic activity for degradation of gaseous formaldehyde
Zhang, Gaoke (author) / Xiong, Qiao (author) / Xu, Wei (author) / Guo, Sheng (author)
Applied Clay Science ; 102 ; 231-237
2014-10-04
7 pages
Article (Journal)
Electronic Resource
English
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