Ultrasonic-hydrothermal Synthesis and Characterization of Mesoporous Anatase TiO2 Microspheres

Hai Bin Li; Shu Guang Chen; Wei Ming Lu; Qi Cheng Liu

doi:10.4028/www.scientific.net/AMR.239-242.2323

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242Ultrasonic-hydrothermal Synthesis and...

Ultrasonic-hydrothermal Synthesis and Characterization of Mesoporous Anatase TiO₂ Microspheres

Abstract:

Mesoporous TiO₂ microspheres with a combination of large surface and high crystallinity were fabricated by an ultrasonic-hydrothermal method with Octadecylamine as a structure-directing agent and tetrabutyl titanate as a precursor. The mesoporous materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption–desorption measurements, and UV–visible diffuse reflectance spectroscopy (UV-vis). Low-angle XRD and TEM images indicated that the disordered wormhole-like mesoporous architecture of TiO₂ microspheres with diameters of about 200-400 nm were actually formed by agglomerization of nanoparticles with an average size of about 10nm. The analysis from N₂ adsorption–desorption isotherms showed that the surface area of mesoporous sample was 204.7 m²g^-1, with a pore size of 4.3 nm and pore volume of 0.263 cm³g^-1 after calcined at 673 K.

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Advanced Materials Research (Volumes 239-242)

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2323-2326

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https://doi.org/10.4028/www.scientific.net/AMR.239-242.2323

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Online since:

May 2011

Authors:

Hai Bin Li, Shu Guang Chen, Wei Ming Lu, Qi Cheng Liu

Keywords:

Hydrothermal, Mesoporous, Photocatalytic, TiO₂, Ultrasonic

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