Abstract
We report the hybridization of ZnO with natural dyes [Laali, Zobo] or synthetic dye [methyl red] forming ZnO–laali, ZnO–zobo and ZnO–methyl red nanocomposites in bright colours. The structural, optical and dye photosensitization influence of the hybrid nanocomposites were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), UV–Visible absorption spectroscopy and photoluminescence (PL). The surface plasmon absorption band of ZnO–laali and ZnO–zobo shifts towards red and blue, respectively, with significantly enhanced absorption intensities, indicating the interaction and optical influence of the respective dyes in photosensitization. Optical and absorption character of ZnO methyl red and bare ZnO are similar indicating the insignificant effect of methyl red on photosensitization. PL spectra of ZnO–laali and ZnO–zobo display enhanced UV light emission due not only to the surface electron transfer from their respective inherent isoplumbagin and anthocyanin to ZnO but also to the extension of the Fermi energy level to the ZnO. Dyes adopted influence the optical band gaps of the evolved hybrid nanocomposites.
Highlights
Nanosized particles of semiconductor materials have gained much more interest in recent years due to their desirable properties and applications in different areas suchInt Nano Lett (2017) 7:171–179 as catalysts, [1] sensors, [2] photoelectron devices [3, 4], and highly functional and effective devices [5]
We report the hybridization of Zinc oxide (ZnO) with natural dyes [Laali, Zobo] or synthetic dye [methyl red] forming ZnO–laali, ZnO–zobo and ZnO–methyl red nanocomposites in bright colours
The structural, optical and dye photosensitization influence of the hybrid nanocomposites were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), UV–Visible absorption spectroscopy and photoluminescence (PL)
Summary
Nanosized particles of semiconductor materials have gained much more interest in recent years due to their desirable properties and applications in different areas suchInt Nano Lett (2017) 7:171–179 as catalysts, [1] sensors, [2] photoelectron devices [3, 4], and highly functional and effective devices [5]. Abstract We report the hybridization of ZnO with natural dyes [Laali, Zobo] or synthetic dye [methyl red] forming ZnO–laali, ZnO–zobo and ZnO–methyl red nanocomposites in bright colours. A photo-sensitive dichroic dye has been considered in comparison with Laali and Zobo to photosensitize ZnO for enhanced optical properties.
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