In this work, polyacrylonitrile nanoparticles (PAN NPs)/polyvinyl alcohol (PVA) precursor nanofibers were prepared by the centrifugal spinning of the dope composed of PAN emulsion and PVA solution. Subsequently, the precursor nanofibers were modified by crosslinking and oximation to obtain PAO NPs/PVA nanofibers. The results of the scanning electron microscope, Fourier transform infrared spectroscopy, and X-ray diffraction indicates that a large number of PAO NPs are exposed on the surface of the PVA nanofibers when the content of PAN NPs exceeds 30 wt%. The PAO NPs/PVA nanofibers possess excellent adsorption kinetics and can adsorb 176.5 mg/g of uranium from uranium ion solution (12 mg/L) within 30 min, which is faster than most other chelating nanofibers. It also has a good selectivity to uranyl ions and good regeneration performance. Its dynamic adsorption process is consistent with the Langmuir model and pseudo-second-order kinetics.

在这项工作中，聚丙烯酰胺纳米颗粒（PAN NPs）/聚乙烯醇（PVA）前体纳米纤维是通过对PAN乳液和PVA溶液组成的浓液进行离心纺丝而制备的。随后，通过交联和肟化改性前体纳米纤维以获得PAO NPs / PVA纳米纤维。扫描电子显微镜，傅立叶变换红外光谱和X射线衍射的结果表明，当PAN NP的含量超过30wt％时，大量的PAO NP暴露在PVA纳米纤维的表面上。PAO NPs / PVA纳米纤维具有出色的吸附动力学，可以在30分钟内从铀离子溶液（12 mg / L）中吸附176.5 mg / g铀，这比大多数其他螯合纳米纤维要快。它还具有对铀酰离子的良好选择性和良好的再生性能。