用于光电应用的柔性创新 PVA/ZrO2/g-C3N4/CNT 纳米复合薄膜

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing Pub Date : 2024-10-05 DOI:10.1016/j.polymertesting.2024.108604

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引用次数: 0

摘要

本研究采用溶液浇铸技术成功制备了掺杂有 ZrO2/(g-C3N4/CNT) 纳米填料的聚乙烯醇（PVA）聚合物薄膜。X 射线衍射 (XRD) 表征了纳米复合薄膜的晶体结构，结果表明 PVA 为半结晶性质，ZrO2 的平均结晶尺寸为 13.17 nm。傅立叶变换红外光谱（FTIR）证实了纳米复合材料中的化学成分和官能团。扫描电子显微镜（SEM）和能量色散 X 射线（EDX）分析表明，纳米填料均匀分散，没有明显的相分离现象。X 射线光电子能谱（XPS）进一步验证了元素组成和化学状态，表明存在碳、氧、氮和锆。光学分析表明，ZrO2/（g-C3N4/CNT）含量的增加使直接和间接带隙分别从 5.41 eV 降至 5.25 eV 和从 5.18 eV 降至 4.92 eV。此外，单振子能量（E0）和色散能量（Ed）增加，而静态折射率（n0）降低。线性光学感度（χ(1)）和三阶非线性光学感度（χ(3)）也得到了改善，从而提高了聚合物分子的极化能力。这些结果表明，掺杂 ZrO2/(g-C3N4/CNT) 的 PVA 薄膜因其增强的光学特性而有望用于光电应用。

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Flexible and innovative PVA/ZrO2/g-C3N4/CNT nanocomposites film for optoelectronic applications

This study successfully prepared polyvinyl alcohol (PVA) polymer films doped with ZrO₂/(g-C₃N₄/CNT) nanofillers using the solution casting technique. The crystal structure of the nanocomposite films was characterized by X-ray diffraction (XRD), revealing the semi-crystalline nature of PVA and an average ZrO₂ crystallite size of 13.17 nm. Fourier-transform infrared (FTIR) spectroscopy confirmed the chemical composition and functional groups present in the nanocomposites. Scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analysis showed uniform dispersion of the nanofillers without noticeable phase separation, with EDX confirming the successful incorporation of ZrO₂, g-C₃N₄, and CNT into the PVA matrix. X-ray photoelectron spectroscopy (XPS) further validated the elemental composition and chemical states, indicating the presence of carbon, oxygen, nitrogen, and zirconium. Optical analysis demonstrated that increasing ZrO₂/(g-C₃N₄/CNT) content reduced the direct and indirect band gaps from 5.41 eV to 5.25 eV and from 5.18 eV to 4.92 eV, respectively. In addition, the single-oscillator energy (E₀) and dispersion energy (E_d) increased, while the static refractive index (n₀) decreased. Improvements were also observed in linear optical susceptibility (χ⁽¹⁾) and third-order nonlinear optical susceptibility (χ⁽³⁾), enhancing the polarizability of the polymer molecules. These results indicate that PVA films doped with ZrO₂/(g-C₃N₄/CNT) hold promise for optoelectronic applications due to their enhanced optical properties.

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.