メカノケミカル法による酸化物への非金属元素ドーピングと特性評価

概要

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Doping of non-metallic element such as N and S into oxide has been conducted by means of a mechanochemical method. This method is composed of two steps : the first is co-grinding the mixture of oxides and the element in air, and the second is calcining the ground sample at about 400℃. The ground sample as well as the calcined sample was characterized by a set of analytical methods, such as X-ray diffraction (XRD), Infrared spectroscopy (IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS). The chemical bonding induced by the grinding allows the doping of non-metallic element into oxide structure, while this doping is not achieved by a mechanical mixing operation of both compounds. The prepared sample exhibits agglomerated states having primary grains in nanoscale. N doped ZnO nanocrystallites show high photocatalytic ability in antibacterial test. The calcined sample TiO_<2-x>S_x under irradiation of visible light with wave-length over 510 nm has shown good performance for NO gas destruction, suggesting its high photocatalytic reactivity.oxidesdopingmechanochemicalnon-metallic elementsphotocatalyst
2005-03-01