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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Fabrication of ZnWO_4 nanofibers by a high direct voltage electrospinning process
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Fabrication of ZnWO_4 nanofibers by a high direct voltage electrospinning process

机译：高压直流电纺丝工艺制备ZnWO_4纳米纤维

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摘要

Mixtures of zinc acetate dihydrate, ammonium metatungstate hydrate, and 5wt%, 6wt%, and 7wt% of poly (vinyl alcohol) (PVA) were electrospun by a +15 kV direct voltage to produce fibers. In the present research, the electrospun fibers of 6 wt% PVA were further calcined at 400-600 °C for 3 h. The sanmarti-nite monoclinic structured ZnWO_4 was detected by X-ray diffractometer (XRD) and selected area electron diffraction (SAED), weight loss by thermogravimetric analyser (TGA), morphology and particle size by scanning and transmission electron microscopes (SEM, TEM) and atomic force microscope (AFM), including their vibration modes by Fourier transform infrared spectrometer (FTIR) and Raman spectrometer. The 4.42 eV direct energy gap (E_g) and 460 nm emission wavelength, caused by the electronic transition of (WO_6)~(2-) octahedrons, were determined by UV-visible absorption and photoluminescence (PL) spectrometers. A possible formation mechanism of ZnWO_4 nanofibers was also proposed according to the experimental results.
机译：将乙酸锌二水合物，偏钨酸铵水合物以及5wt％，6wt％和7wt％的聚乙烯醇（PVA）的混合物在+15 kV直流电压下进行电纺丝，以生产纤维。在本研究中，将6 wt％PVA的电纺纤维在400-600°C下进一步煅烧3 h。 X射线衍射仪（XRD）和选定区域电子衍射（SAED），热重分析仪（TGA）失重，扫描和透射电子显微镜（SEM，TEM）检测的三马尼特单斜结构ZnWO_4原子力显微镜（AFM），包括傅立叶变换红外光谱仪（FTIR）和拉曼光谱仪的振动模式。由（WO_6）〜（2-）八面体的电子跃迁引起的4.42 eV直接能隙（E_g）和460 nm发射波长由紫外可见吸收和光致发光（PL）光谱仪测定。根据实验结果，提出了可能的ZnWO_4纳米纤维的形成机理。

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