The preparation,characterization and photocatalytic activity of radical-shaped CeO2/ZnO microstructures |
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| Authors: | I-Tsan Liu Min-Hsiung Hon Lay Gaik Teoh |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan;2. Department of Mechanical Engineering, National Pingtung University of Science and Technology, Neipu, Pingtung 912, Taiwan |
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| Abstract: | This paper uses a wet-chemical precipitation route to prepare radical-shaped ZnO microprisms and to deposit Cerium oxide (CeO2) on the surface of ZnO, to form CeO2/ZnO microstructures. The samples are characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV–vis diffuse reflectance spectroscopy. Their catalytic activity is also evaluated using methylene blue (MB) as a detection reagent. CeO2/ZnO systems exhibit higher UV absorption and transparency in the visible region. The experimental results show that the deposition of CeO2 nanospecies is successful and that the radical-shaped microstructures of ZnO are well maintained. The CeO2/ZnO microstructures exhibit a much greater intensity of UV-light absorptivity and much higher photocatalytic activity than those of radical-shaped ZnO microprisms. |
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| Keywords: | Radical-shaped ZnO microprisms Radical-shaped CeO2/ZnO Methylene blue (MB) UV light absorption Photocatalytic activity |
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