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Morphological and chemical/physical characterization of Fe-doped synthetic chrysotile nanotubes

机译:掺铁合成温石棉纳米管的形态,化学/物理表征

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In the field of thin-layered-structured inorganic nanotubes, morphological, structural, and chemical/physical modifications induced in synthetic stoichiometric chrysotile nanotubes have been evaluated as a function of the extent of Fe doping, Fe doped synthetic chrysotile nanocrystals have been obtained in the range from 0.29 wt.-% up to 1.37 wt.-% Fe. A partial Fe replacement for Si and Mg has been observed through the modification of Fourier-transform infrared (FTIR) absorption bands. FTIR spectroscopic, X-ray diffraction,and thermogravimetric analyses provide evidence for FE inclusion into the chrysotile crystal structure, in both octahedral and tetrahedral sites, which induces a flattening of the curved brucite-like layers in the stoichiometric chrysotile. Further characterization by morphological analysis (scanning electron microscopy, transmission electron microscopy, and atomic force microscopy) has revealed the effect of Fe doping on the aggregation of chrysotile nanotubes. The results appear interesting in light of the proposed possibilities of synthetic chrysotile fibers to represent an alternative to carbon nanotubes for innovative technological applications.
机译:在薄层结构的无机纳米管领域,已评估了合成化学计量温石棉纳米管中诱导的形态,结构和化学/物理修饰与铁掺杂程度之间的函数关系,已获得了铁掺杂的合成温石棉纳米晶体。 Fe的含量范围为0.29重量%至1.37重量%。通过傅立叶变换红外(FTIR)吸收带的修饰,已观察到部分Fe替代Si和Mg。 FTIR光谱,X射线衍射和热重分析为八面体和四面体位点中的温石晶体结构中的FE包含提供了证据,这导致化学计量温石棉中弯曲的水镁石状层变平。通过形态分析(扫描电子显微镜,透射电子显微镜和原子力显微镜)的进一步表征已经揭示了铁掺杂对温石棉纳米管聚集的影响。鉴于提出的合成温石棉纤维代表创新技术应用中碳纳米管的替代方案的结果,结果似乎很有趣。

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