Suwanchawalit, Cheewita and Wongnawa, Sumpun (2010) Triblock copolymer-templated synthesis of porous TiO2 and its photocatalytic activity. Journal of Nanoparticle Research, 12 (8). pp. 2895-2906.
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Mixed amorphous and anatase-type titania particles were synthesized using non-ionic triblock copolymer as surfactant template and TiOSO4 as inorganic precursor through sol-gel process. The as-prepared materials were characterized by X-ray diffraction spectroscopy, scanning and transmission electron microscopy, specific surface area, Fourier-transformed infrared spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy. The template material could be easily removed by extracting with dichloromethane and was confirmed by infrared spectroscopy. X-ray diffraction pattern reveals the crystalline part of as-prepared product as a framework of anatase phase. From the N-2 adsorption-desorption analysis, the as-prepared sample has a surface area of 301 m(2)/g with pore size distribution narrowly centered around 6 nm. The photodegradation of indigo carmine including kinetics, effect of pH, and recyclability of the product were investigated. The photocatalytic results showed that the as-synthesized titania could efficiently degrade indigo carmine under ultraviolet irradiation and showed higher photocatalytic activity than the commercial Degussa P25-TiO2.
|Subjects:||Material Science > Nanostructured materials|
|Deposited On:||26 Dec 2010 13:12|
|Last Modified:||26 Dec 2010 13:12|
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