A general approach to porous crystalline TiO2, SrTiO3, and BaTiO3 spheres |
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Authors: | Wang Yawen Xu Hua Wang Xiaobing Zhang Xi Jia Huimin Zhang Lizhi Qiu Jianrong |
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Institution: | Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, People's Republic of China. |
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Abstract: | Monodispersed porous crystalline TiO(2), SrTiO(3), and BaTiO(3) spheres were produced through a one-step hydrothermal process from amorphous TiO(2) spheres. The resulting samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and nitrogen sorption measurements. On the basis of the characterization results, we proposed a formation process of these porous spheres according to a mechanism analogous to the Kirkendall effect. This study provides a general way to synthesize porous titania-based spheres. |
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