Abdallah Eman M, Alenizi Maha Aiiad, Asnag Ghaleb M, Waly Ahmed L, Mater Entsar H, Al-Hakimi Ahmed N, Khoreem Sadiq H, Morsi Mohamed A
Department of Basic Sciences, Delta University for Science and Technology, Gamasa, Mansoura, Egypt.
Department of Physics, Faculty of Sciences-Arar, Northern Border University, P.O. Box 1321, 91431 Arar, Saudi Arabia.
ACS Omega. 2025 Aug 11;10(32):36396-36411. doi: 10.1021/acsomega.5c04734. eCollection 2025 Aug 19.
This study presents a comprehensive investigation of the optical, thermal, structural, and electrical properties of poly-(ethylene oxide) (PEO)/polyvinylpyrrolidone (PVP) blends embedded with molybdenum trioxide nanobelts (MoO NBs). The nanocomposites were fabricated via solution casting with varying concentrations of MoO NBs to assess their influence on the polymer matrix. X-ray diffraction (XRD) analysis demonstrated the semicrystalline nature of PEO/PVP blends and revealed structural modifications induced by the nanofiller. Fourier transform infrared (FTIR) spectroscopy showed electrostatic interactions between the polymer matrix and MoO NBs, facilitated by intermolecular and intramolecular hydrogen bonding. The indirect optical band gap decreased from 4.57 eV (pure blend) to 3.54 eV (4.0 wt % MoO), indicating enhanced optoelectronic properties. Thermogravimetric analysis (TGA) confirmed improved thermal stability upon nanobelt addition, while scanning electron microscopy (SEM) revealed a uniform dispersion of MoO NBs within the polymer matrix. Furthermore, the nanocomposites exhibited significantly enhanced AC conductivity compared to the pure matrix, along with tunable dielectric properties consistent with non-Debye relaxation behavior. These findings highlight the potential of PEO/PVP-MoO nanocomposite samples as tailorable dielectric materials for advanced applications in flexible solid-polymer electrolytes and high-performance energy-storage systems.
本研究全面调查了嵌入三氧化钼纳米带（MoO NBs）的聚环氧乙烷（PEO）/聚乙烯吡咯烷酮（PVP）共混物的光学、热学、结构和电学性能。通过溶液浇铸法制备了不同浓度MoO NBs的纳米复合材料，以评估其对聚合物基体的影响。X射线衍射（XRD）分析表明PEO/PVP共混物具有半结晶性质，并揭示了纳米填料引起的结构变化。傅里叶变换红外（FTIR）光谱显示，聚合物基体与MoO NBs之间存在静电相互作用，分子间和分子内氢键促进了这种相互作用。间接光学带隙从4.57 eV（纯共混物）降至3.54 eV（4.0 wt% MoO），表明光电性能得到增强。热重分析（TGA）证实添加纳米带后热稳定性有所提高，而扫描电子显微镜（SEM）显示MoO NBs在聚合物基体内均匀分散。此外，与纯基体相比，纳米复合材料的交流电导率显著提高，同时具有与非德拜弛豫行为一致的可调介电性能。这些发现突出了PEO/PVP-MoO纳米复合样品作为可定制介电材料在柔性固体聚合物电解质和高性能储能系统等先进应用中的潜力。
