Influence of Ta2O5 nanoparticles on the polyvinyl alcohol films’ structure and optical parameters for UV shielding applications

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2024-11-01 DOI:10.1016/j.optmat.2024.116426

T.S. Soliman

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Abstract

Our current objective is to develop a pioneering system utilizing polyvinyl alcohol (PVA) as a host matrix for the Ta₂O₅ nanoparticles for shielding applications. The PVA-Ta₂O₅ films were obtained via casting and characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), and a polarized optical microscope. XRD and FTIR analyses showed the incorporation of Ta₂O₅ nanoparticles in the PVA matrix and the change in the polymeric film structure. The optical bandgap energy of the PVA was affected by the inclusion of Ta₂O₅ nanoparticles and was investigated through Tauc's relation using the absorption data recorded from the ultraviolet–visible spectrophotometer. The direct/indirect bandgaps decreased from 5.37/4.51 eV to 3.52/2.24 eV for PVA undoped and PVA after doping with 5.7 % Ta₂O₅, respectively. Moreover, the refractive index of the polymer film increased from 1.9148 for pure PVA to 2.3347 after 5 % Ta₂O₅ was added to the PVA. Adding Ta₂O₅ nanoparticles to the PVA film improves PVA's optical parameters, qualifying it for use in many optical applications.

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Ta2O5 纳米粒子对聚乙烯醇薄膜结构和光学参数的影响（紫外线屏蔽应用

我们目前的目标是开发一种利用聚乙烯醇（PVA）作为 Ta2O5 纳米粒子的宿主基质以实现屏蔽应用的开创性系统。我们通过浇铸获得了 PVA-Ta2O5 薄膜，并使用 X 射线衍射 (XRD)、傅立叶变换红外 (FTIR) 和偏光光学显微镜对其进行了表征。X 射线衍射（XRD）和傅立叶变换红外（FTIR）分析表明，Ta2O5 纳米粒子加入了 PVA 基体，聚合物薄膜结构发生了变化。加入 Ta2O5 纳米粒子后，PVA 的光带隙能受到了影响，并利用紫外-可见分光光度计记录的吸收数据，通过陶氏关系进行了研究。未掺杂的 PVA 和掺杂 5.7 % Ta2O5 后的 PVA 的直接/间接带隙分别从 5.37/4.51 eV 下降到 3.52/2.24 eV。此外，在 PVA 中添加 5 % 的 Ta2O5 后，聚合物薄膜的折射率从纯 PVA 的 1.9148 增至 2.3347。在 PVA 薄膜中添加 Ta2O5 纳米粒子改善了 PVA 的光学参数，使其能够用于多种光学应用。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.