Fabrication and properties of flower-shaped Pt@TiO2 core-shell nanoparticles |
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| Authors: | Xiao-Feng Wu Jeong-Mo Yoon |
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| Affiliation: | a State Key Laboratory of Multiphase Complex System, Institute of Process Engineering of Chinese Academy of Sciences, Beijing, 100190, Chinab Division of Advanced Materials Engineering and Research Centre for Industrial Technology, College of Engineering, Chonbuk National University, Chonju 561-756, South Korea |
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| Abstract: | Flower-shaped core-shell Pt@TiO2 nanoparticles have been synthesized successfully by a simple hydrothermal route using TiF4 as precursor. Morphology of the product was investigated by transmission electron microscopy (TEM), selected area electron diffraction (SAED) and X-ray diffraction technique. It has been revealed that the TiO2 shells of core-shell Pt@TiO2 nanoparticles are constructed by multiple wedge-shaped petals of TiO2 crystals with anatase-type crystalline phase. The SAED pattern of TiO2 shells reflecting the formation of wedge-shaped TiO2 petals is because of the preferential growth of (004) crystal planes surrounded by (101) facets of TiO2 crystal planes. The high phototocatalytic performance of flower-shaped core-shell Pt@TiO2 nanoparticles is also largely attributed to the high Schottky energical barrier within Pt-TiO2 hetero-interface and the interaction between synchronously vibrated electrons within Pt and electrons in valence band of TiO2 crystals. |
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| Keywords: | Microstructure Crystal growth Core-shell particles Hetero-interface |
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