Structural, optical properties and photocatalytic activity of spin-coated CuO thin films

IF 1.7 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
D. Komaraiah, R. Sayanna
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引用次数: 1

Abstract

The semiconductor metal oxide CuO films have been fabricated using spin coating techniques. The prepared CuO thin films were annealed at different temperatures and characterized by an x-ray diffractometer, scanning electron microscope (SEM), energy-dispersive x-ray spectroscopy (EDS), FTIR, UV–vis, and fluorescence spectrometer. X-Ray diffraction (XRD) patterns revealed the polycrystalline nature of CuO with the monoclinic crystal structure. SEM analysis of CuO films endorsed the particle-like spherical shape structure. The CuO thin films have shown high optical absorption with a narrow bandgap. The band gap values were evaluated from Tauc’s plots and these values were found to be in the range of 1.63 to 1.72 eV. At an excitation of 325 nm, the CuO films display characteristic photoluminescence (PL) emission in the UV and visible regions. Furthermore, the CuO thin films show enhanced photocatalytic performance towards the degradation of organic dyes under visible light.
自旋涂覆CuO薄膜的结构、光学性质及光催化活性
采用自旋镀膜技术制备了半导体金属氧化物CuO薄膜。对制备的CuO薄膜在不同温度下进行退火处理,并用x射线衍射仪、扫描电镜(SEM)、能谱仪(EDS)、红外光谱(FTIR)、紫外可见光谱(UV-vis)和荧光光谱仪对其进行表征。x射线衍射(XRD)显示了CuO具有单斜晶结构的多晶性质。扫描电镜分析表明,CuO薄膜呈颗粒状球形结构。CuO薄膜具有高的光吸收和窄的带隙。根据Tauc图计算带隙值,发现带隙值在1.63 ~ 1.72 eV之间。在325 nm的激发下,CuO薄膜在紫外区和可见光区显示出特有的光致发光(PL)。此外,在可见光下,CuO薄膜对有机染料的降解表现出增强的光催化性能。
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来源期刊
Advances in Natural Sciences: Nanoscience and Nanotechnology
Advances in Natural Sciences: Nanoscience and Nanotechnology NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
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