Synthesis and Photocatalytic Studies of SiO2 and Co-SiO2 Microspheres Prepared by Self-Assembly ProcessesReport as inadecuate




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SiO2 and Co-SiO2 microspheres was synthesized using TEOS as starting materials by self-assembly processes and used for the photodegradation of GV, ST, and RB under solar light. The samples were characterized by a combination of various physicochemical techniques, such as, diffuse reflectance UV–vis, X-ray diffraction, SEM, and FT-IR. The size distribution of SiO2 and Co-SiO2 microspheres is relatively narrow. The SiO2 for the three dyes have not photoactivity under solar light. By contrast, the Co-SiO2 exhibited high photodegradation yields that is 79%,45%, and 33% for GV, ST, and RB under solar light, respectively.

KEYWORDS

self-assembly processes;microsphere;SiO2;Co-SiO2;Photocatalyst

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Author: Ying-chun Miao, Neng-bang Hou, Shu Zhao, Jia-qiang Wang, Zhong-biao Zhai

Source: http://www.scirp.org/



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