Fluorescent emission from a natural carbon matrix incorporating sodium
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The process of functionalization of metals in natural carbon matrices has become an important area of research due to its improved properties and applications. Carbon materials possessing photoluminescence (PL) properties find a wide range of applications in photonics. Among the various carbon materials available in nature, cellulose has critical importance since it is the most abundant and wide-spread biopolymer on Earth, and also, the important component in plants’ skeleton. In the present work, the functionalized carbonaceous material is prepared by the hydrothermal treatment of natural cellulosic source Aloe Vera and the metallic element sodium is properly incorporated into it by adding sodium borohydride to observe the fluorescence emission changes. The incorporation of metal ions in the carbon matrix leads to structural modifications and properties as evidenced by field emission scanning electron microscopy, Energy dispersive spectroscopy, X-ray dot mapping, X-ray Photoelectron spectroscopy, and X-ray diffraction analysis. The optical emission characteristics are studied using Photoluminescence spectroscopy, CIE plot, power spectrum, color purity, and quantum yield. The excitation wavelength dependent photoluminescence emission mechanism shown by the carbon–metal incorporated products obtained from the cellulosic raw materials makes them suitable for biomedical and biosensing applications because of the non-toxic and eco-friendly nature.
The authors are thankful to Department of Optoelectronics and Nanoscience and Nanotechnology, University of Kerala, Trivandrum, India for providing the laboratory facilities. The authors are also thankful to Ms. Sariga C Lal and Dr. G. Subodh, Department of Physics, University of Kerala for the technical support given in the Rietveld analysis.
Compliance with ethical standards
Conflict of interest
There are no conflicts to declare.
- 20.A.D. Broadbent, in Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, 3rd ed. by Encyclopedia of Spectroscopy and Spectrometry, pp. 321–327 (2017). https://doi.org/10.1016/B978-0-12-803224-4.00014-5