A facile and green strategy for large-scale synthesis of silica nanotubes using ZnO nanorods as templates |
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Authors: | Xianming Hou Feng Li Guofang He Jianping Zhang |
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Affiliation: | 1. School of Chemistry & Chemical Engineering, Taishan University, Taian 271021, China;2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract: | Hollow silica nanostructures exhibit important applications in catalysis, sensing, and gene delivery due to their increased surface areas, good biocompatibility, and unique optical features. Here we report a simple and green approach to synthesize silica nanotubes using environment—friendly ZnO nanorods as templates. The ZnO nanorods are first coated with a layer of uniform silica shell by a sol–gel method. Then silica nanotubes are derived from the ZnO@SiO2 nanohybrids after removal of the ZnO nanorod cores in diluted hydrochloric acid solution. The samples at different stages were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Energy-dispersive X-ray spectroscopy, and Transmission electron microscopy. By controlling the structure of the ZnO@SiO2 nanohybrids, such as shell thickness, and the diameter and length of ZnO nanorods, size controllable SiO2 nanotubes can be expected. |
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Keywords: | ZnO nanorods Templates Silica nanotubes Sol&ndash gel processes |
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