Abstract
The composite microspheres containing polymethylmethacrylate (PMMA) cores and ceria (CeO2) nanoparticles shells were synthesized by in situ chemical precipitation based on electrostatic interaction. The PMMA/CeO2 colloidal crystal templates were self-assembled by a modified two-substrate vertical deposition method. After removal of the polymer cores by calcination, the three-dimensional ordered CeO2 hollow spheres (3DOHSs-CeO2) films were fabricated. The resulting 3DOHSs-CeO2 materials were characterized by X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, and N2 adsorption–desorption analysis. Results indicate that the obtained samples presented a typical face-centered cubic structure, and the CeO2 hollow spheres (HSs) formed shared necks with each other. The average CeO2 HSs diameters and center-to-center distances were 230–240 nm, and the porous shells (20–30 nm in thickness) of CeO2 HSs were consisted of tiny CeO2 nanoparticles with a size of 10–20 nm. This work suggested that the 3DOHSs architectures would be valuable for photonic crystals, advanced optical and catalytic applications.
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The work was supported financially by the Applied Basic Research Project of Suzhou City (SYG201316) and the Key Laboratory for Environment Functional Materials of Jiangsu Province (SJHG1302).
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Chen, A., Chen, Y. & Chen, Z. Three-Dimensional Ordered CeO2 Hollow Spheres (3DOHSs-CeO2) from Polymethylmethacrylate/CeO2 Core/Shell Microsphere Colloidal Crystals. J Inorg Organomet Polym 26, 69–74 (2016). https://doi.org/10.1007/s10904-015-0282-6
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DOI: https://doi.org/10.1007/s10904-015-0282-6