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| Preparation and Photocatalytic Activity of Meso-silica/ceria Binary Composites with a Core/shell Structure |
MU Zhaoyu, CAI Wenjie, CHEN Yue, PAN Jie, CHEN Yang( ) |
| School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China |
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Cite this article:
MU Zhaoyu, CAI Wenjie, CHEN Yue, PAN Jie, CHEN Yang. Preparation and Photocatalytic Activity of Meso-silica/ceria Binary Composites with a Core/shell Structure. Chinese Journal of Materials Research, 2021, 35(5): 364-370.
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Abstract In order to improve the photocatalytic activity and efficiency of ceria materials, the binary composite photocatalyst with a core/shell structure was fabricated by grafting CeO2 nanoparticles on the surfaces of worm-like mesoporous silica supports. The prepared composite was characterized by means ofXRD, SEM, TEM, STEM-EDX mapping, UV-Vis, Raman, PL, N2 adsorption-desorption measurements. The photodegradation towards methylene blue catalyzed by composite particles was tracked under UV irradiation. The results show that the particle size of mesoporous silica with a specific area up to 1627 m2/g is in the range of 180~200 nm, which was covered with an uniform layer of ca. 20 nm in thickness composed of a large number of nanometer ceria particles. The mesoporous cores exhibited a strong adsorption capacity for MB and therefore enriched MB around CeO2 active nanoparticles, resulting in enhanced photodegradation activity for MB. Furthermore, it is worth noting that CeO2 nanoparticles in the shell were doped with Er3+ and then calcinated in nitrogen atmosphere, can further enhance the photodegradation reaction activity of the binary composite photocatalyst.
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Received: 05 August 2020
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| Fund: National Natural Science Foundation of China(51575058) |
About author: CHEN Yang, Tel: (0519)86330066, E-mail: cy.jpu@126.com
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