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首页> 外文OA文献 >Synthesis, Characterization and Photocatalytic Activity of Nanocrystalline First Transition-Metal (Ti, Mn, Co, Ni and Zn) Oxisde Nanofibers by Electrospinning
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Synthesis, Characterization and Photocatalytic Activity of Nanocrystalline First Transition-Metal (Ti, Mn, Co, Ni and Zn) Oxisde Nanofibers by Electrospinning

机译：耐电纺丝纳米晶第一过渡 - 金属（Ti，Mn，Co，Ni和Zn）氧化型纳米纤维的合成，表征和光催化活性

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In this work, five nanocrystalline first transition-metal (Ti, Mn, Co, Ni and Zn) oxide nanofibers were prepared by electrospinning and controlled calcination. The morphology, crystal structure, pore size distribution and specific surface area were systematically studied by scanning electron microscope (SEM), transmission electron microscope (TEM), surface and pore analysis, and thermo gravimetric analyzer (TGA). The results reveal that the obtained nanofibers have a continuously twisted three-dimensional scaffold structure and are composed of neat nanocrystals with a necklace-like arrangement. All the samples possess high specific surface areas, which follow the order of NiO nanofiber (393.645 m2/g) > TiO2 nanofiber (121.445 m2/g) > ZnO nanofiber (57.219 m2/g) > Co3O4 nanofiber (52.717 m2/g) > Mn2O3 nanofiber (18.600 m2/g). Moreover, the photocatalytic degradation of methylene blue (MB) in aqueous solution was investigated in detail by employing the five kinds of metal oxide nanofibers as photocatalysts under ultraviolet (UV) irradiation separately. The results show that ZnO, TiO2 and NiO nanofibers exhibit excellent photocatalytic efficiency and high cycling ability to MB, which may be ascribed to unique porous structures and the highly efficient separation of photogenerated electron-hole pairs. In brief, this paper aims to provide a feasible approach to achieve five first transition-metal oxide nanofibers with excellent performance, which is important for practical applications.
机译：在这项工作中，通过静电纺丝和受控煅烧制备五个纳米晶的第一过渡 - 金属（Ti，Mn，Co，Ni和Zn）。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），表面和孔隙分析和热重分析仪（TGA）系统地研究了形态学，晶体结构，孔径分布和比表面积。结果表明，所得纳米纤维具有连续扭曲的三维支架结构，并且由纯净的纳米晶体与项链的布置组成。所有样品具有高比表面积，其沿NiO纳米纤维（393.645m2 / g）> TiO2纳米纤维（121.445m2 / g）> ZnO纳米纤维（57.219m2 / g）> Co3O4纳米纤维（52.717m2 / g） Mn2O3纳米纤维（18.600m2 / g）。此外，通过使用五种金属氧化物纳米纤维作为光催化剂分开，详细研究了水溶液中亚甲基蓝（MB）的光催化降解了水溶液中的光催化催化降解了紫外（UV）辐射。结果表明，ZnO，TiO 2和NiO纳米纤维具有优异的光催化效率和高循环能力，可赋予独特的多孔结构和光生电子孔对的高效分离。简而言之，本文旨在提供一种可行的方法来实现具有优异性能的五个第一过渡 - 金属氧化物纳米纤维，这对于实际应用很重要。

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