The Impact of Varying the Number of Layers Deposited Using the Spin-Coating Technique on the Structural, Optical, and Photocatalytic Properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Brazilian Journal of Physics Pub Date : 2024-07-31 DOI:10.1007/s13538-024-01567-y

Aimane Guedri, Mourad Zaabat, Boubekeur Boudine, Okba Guedri, Abdelkader Hafdallah

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Abstract

Spin coating is a key method for thin film preparation due to its simplicity and cost-effectiveness, relying on the number of layers deposited. This study investigates the impact of sample thickness on polyvinyl chloride (PVC) nanocomposites doped with zinc oxide (ZnO) nanoparticles, focusing on structural, optical properties, and photocatalytic activity. Different numbers of layers (15, 20, 25, and 30) were synthesized via sol–gel spin coating using tetrahydrofuran as a solvent. X-ray diffraction revealed ZnO crystallites in 30-layer films, with a wurtzite structure and 32 nm crystallite size. Raman and infrared spectra confirmed ZnO incorporation. Optical transmittance ranged from 75 to 86%, with band gap energies between 3.45 and 3.94 eV. Photoluminescence spectra indicated ultraviolet and green luminescence attributed to ZnO defects. Photocatalytic efficiency, tested with methylene blue under UV irradiation, showed the 30-layer sample achieving 79% removal efficiency at 60 min, outperforming others.

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利用自旋涂布技术改变沉积层数对聚氯乙烯/氧化锌纳米复合薄膜的结构、光学和光催化性能的影响

旋涂法是制备薄膜的一种重要方法，因其简单、成本效益高，且取决于沉积层数。本研究探讨了样品厚度对掺杂纳米氧化锌（ZnO）的聚氯乙烯（PVC）纳米复合材料的影响，重点关注其结构、光学特性和光催化活性。以四氢呋喃为溶剂，通过溶胶-凝胶旋涂合成了不同层数（15、20、25 和 30 层）的纳米复合材料。X 射线衍射显示，30 层薄膜中的氧化锌晶粒为钨锆结构，晶粒大小为 32 纳米。拉曼光谱和红外光谱证实了氧化锌的加入。光学透射率在 75% 到 86% 之间，带隙能在 3.45 到 3.94 eV 之间。光致发光光谱显示紫外线和绿色发光归因于氧化锌缺陷。在紫外线照射下用亚甲基蓝进行的光催化效率测试表明，30 层样品在 60 分钟内的去除率达到 79%，优于其他样品。

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来源期刊

Brazilian Journal of Physics 物理-物理：综合

CiteScore

2.50

自引率

6.20%

发文量

189

审稿时长

6.0 months

期刊介绍： The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.