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Photocatalysis Studies under Visible Light Irradiation with TiO2 Obtained by Pulsed Electric Field Assisted Sol-Gel Method

机译：可见光下TiO 2脉冲电场辅助溶胶-凝胶法的光催化研究

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摘要

The objective of this thesis was to study the effect of pulsed electric field on the preparation of TiO2 nanoparticles via sol-gel method under the visible light irradiation. The literature part introduces properties of different TiO2 crystal forms and principle of photocatalysis. It was expected that pulsed electric field would have an influence on degradation for oxalic acid and formic acid. TiO2 samples were prepared by using three frequencies (50Hz, 294Hz, and 963Hz) and two treatment times (12 minutes and 24 minutes) of pulsed electric field. The photocatalytic activities of TiO2 samples produced with sol-gel method were also compared with the TiO2 particles made by previous study and with the commercial TiO2 powder Aeroxide® (Evonic Degussa GmbH) at the same condition. Results show that pulsed electric field does have an effect on degradation for oxalic acid and formic acid. Generally, higher photocatalytic activities for oxalic acid and formic acid were obtained with lower frequency and longer treatment time of pulsed electric field.
机译：本文的目的是研究在可见光照射下脉冲电场对溶胶-凝胶法制备TiO2纳米粒子的影响。文献部分介绍了不同TiO2晶型的性质和光催化原理。预期脉冲电场将对草酸和甲酸的降解产生影响。通过使用三个频率（50Hz，294Hz和963Hz）和两个脉冲电场处理时间（12分钟和24分钟）来制备TiO2样品。还将溶胶-凝胶法制得的TiO2样品的光催化活性与先前研究制得的TiO2颗粒以及市售TiO2粉末（Evonic Degussa GmbH）在相同条件下进行了比较。结果表明，脉冲电场确实会对草酸和甲酸的降解产生影响。通常，以较低的频率和较长的脉冲电场处理时间可以获得较高的草酸和甲酸的光催化活性。

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    Wang Zhao;

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  • 年度 2015
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  • 正文语种 en
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