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首页> 外文期刊>Journal of Applied Polymer Science >Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles
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Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

机译：用ZnO纳米粒子装载ElecturpOm聚丙烯腈纳米纤维的重金属离子吸附的增强

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This article describes the adsorption and tensile behavior of electrospun polyacrylonitrile (PAN) nanofiber mats loaded with different amounts of ZnO [0.5, 1.0, 2.0, and 5.0 wt%] nanoparticles. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transforminfrared (FTIR) spectroscopy, and thermal gravimetric analysis (TGA) were utilized to characterize the resulting composite nanofibers. Microscopic investigations revealed that the increase in surface roughness and diameter of the electrospun PAN nanofibers was due to the addition of ZnO nanoparticles. Adsorption results indicated that the fabricated PAN/ZnO (2.0 wt%) composite nanofiber mats showed the best adsorption performance with 261% and 167% increase in adsorption capacities for Pb(II) and Cd(II) from aqueous solutions, respectively, compared to pristine PAN nanofibers. The adsorption equilibrium was reached within 60 min, and the process could be described using the nonlinear pseudo-second-order kinetic model. The adsorption isotherm study was better represented by the Langmuir model, which suggested a homogeneous distribution of the monolayer adsorptive sites on the surface of the composite nanofibers. Mechanical testing revealed that the decrease in tensile strength and elongation at breakof the PAN/ZnO composite nanofiber mats was due to the formation of some bead defects and agglomerates within the structure of the PAN nanofibers. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47209.
机译：本文介绍了电纺聚乙烯腈（PAN）纳米纤维垫的吸附和拉伸行为，其含有不同量的ZnO [0.5,1.0,2.0和5.0wt％]纳米颗粒。利用X射线衍射（XRD），扫描电子显微镜（SEM），傅里叶变换（FTIR）光谱和热重分析（TGA），表征所得复合纳米纤维。微观调查显示，电纺PAN纳米纤维的表面粗糙度和直径的增加是由于加入ZnO纳米颗粒。吸附结果表明，制造的锅/ ZnO（2.0wt％）复合纳米纤维垫表现出最佳吸附性能，其分别与水溶液的Pb（II）和CD（II）的吸附容量增加261％和167％。原始PAN纳面纤维。在60分钟内达到吸附平衡，并且可以使用非线性伪二阶动力学模型来描述该方法。 Langmuir模型的吸附等温线研究更好地表示，这提出了单层吸附位点在复合纳米纤维表面上的均匀分布。机械测试显示，锅/ ZnO复合纳米纤维垫断裂的拉伸强度和伸长率下降是由于锅纳米纤维的结构内的一些珠缺陷和附聚物。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47209。

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