P5 粒子状チタニア光触媒によるアゾ色素分解における超音波照射効果(環境的応用)

概要

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The degradation of methyl orange in water was kinetically investigated using sonolysis and photocatalysis, employed either separately or simultaneously, with titania coated silica-gel particles as photocatalysts. The photocatalytic degradation rate of methyl orange was dependent on the particle size of photocatalysts; smaller catalyst particles around 5μm exhibited 5 times larger activity than the porous particles around 1-5mm. The degradation rates by sonolysis were negligible at 49kHz and increased to the order of the photocatalysis with the sonication at 178kHz. Simultaneous irradiation of ultrasound and UV light for photocatalysis increased the degradation rate about to the sum of the individual processes but the significant synergistic enhancement was not observed.
日本ソノケミストリー学会の論文
2003-10-30