晶相可控的ZrO2纳米线的无卤制备及表征

摘要

ZrO2 nanofibers with controllable crystalline phase were fabricated via a halide-free strategy. Polyvinylpyrrolidone( PVP)/Zr ( NO3 ) 4 precursor nanofibers were first synthesized using electrospinning method. After sintering such precursor nanofibers at high temperature, the PVP and Zr ( NO3 ) 4 decomposed and the resulting ZrO2 nanofibers formed. The crystal structure, morphology and thermal stability were investi-gated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and thermogravim-etric analysis. The morphology and crystal structure of ZrO2 nanomaterials could be tuned by controlling calci-nation temperature.%采用无卤法制备晶相可控的ZrO2纳米线。通过静电纺丝法制备聚乙烯吡咯烷酮(PVP)与Zr(NO3)4的复合纤维；再通过煅烧法在除去聚合物模板的同时制备ZrO2纳米线。采用X射线衍射( XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)仪及热重差热联用热分析仪(DSC-TGA)对材料的晶相结构、形貌及热稳定性进行表征。通过改变煅烧温度，可以实现ZrO2纳米材料形貌及晶相组成的调控。