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首页> 外文期刊>Key Engineering Materials >Effect of Low Frequency and Power Ultrasonic Treatment on the Surface Adsorbed Organics and Visible Light Photocatalysis Activity of Nanosized TiO_2 Photocatalyst
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Effect of Low Frequency and Power Ultrasonic Treatment on the Surface Adsorbed Organics and Visible Light Photocatalysis Activity of Nanosized TiO_2 Photocatalyst

机译：低频和超声处理对纳米TiO_2光催化剂表面吸附有机物和可见光催化活性的影响

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摘要

The effect of ultrasonic treatment under low frequency and power condition on the surface adsorption state and photocatalysis activity of nanosized TiO_2 photocatalyst was studied. Results obtained from UV-Vis absorption spectra revealed that obvious differences of adsorption state on TiO_2 powder surface were found after ultrasonic treatment, which agreed with the DTA-TG results that the thermal peaks varied with increasing ultrasonic treatment time. Furthermore, the photocatalysis activity for methyl-orange solution under visible light irradiation ( ≥ 450 nm) varied in a similar way with increasing ultrasonic treatment time. Present study revealed that the ultrasonic treatment was an effective way to study the relation between the surface adsorption state and photocatalysis activity of present nanosize TiO_2 photocatalyst.
机译：研究了低频和功率条件下超声处理对纳米TiO_2光催化剂表面吸附状态和光催化活性的影响。 UV-Vis吸收光谱结果表明，超声处理后，TiO_2粉末表面的吸附状态存在明显差异，这与DTA-TG结果一致，即热峰随超声处理时间的增加而变化。此外，可见光照射（≥450 nm）下甲基橙溶液的光催化活性随超声处理时间的增加以类似的方式变化。目前的研究表明，超声处理是研究当前纳米TiO_2光催化剂表面吸附状态与光催化活性之间关系的有效方法。

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