Facile synthesis of well-defined CeO₂ hollow spheres with a tunable pore structure

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• 作者：Jian Zhang^a ; ^b ; Ming Gong^b ; Chuanjin Tian^a ; Chang-An Wang^b ; ^{wangca@mail.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Self-assemble ; Hollow spheres ; SiO2 template
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：42
• 期：5
• 页码：6088-6093
• 全文大小：1289 K

文摘

Herein, SiO₂@CeO₂ composite microspheres were successfully prepared via a hydrothermal assisted layer-by-layer self-assembly method employing colloid SiO₂ as the template, which was fabricated by a typical Stöber method. Monodispersed CeO₂ hollow spheres with a narrow size distribution were achieved after etching colloid SiO₂ templates through NaOH. The resultant samples were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscopy (TEM), Fourier translation infrared spectroscopy (FT-IR), X-ray photoelectron spectrum (XPS), and Nitrogen adsorption–desorption isothermal. Specifically, the shell thickness and the mesoporous structure of the hollow sphere can be easily controlled by changing the concentration of cerium source.