A facile green synthetic method is proposed for the synthesis of zinc oxide nanoparticles (ZnO NPs) using the bio-template Cinnamomum tamala (C. tamala) leaves extract. The morphological, functional, and structural characterization of synthesized ZnO NPs were studied by adopting different techniques such as energy dispersive X-ray analysis (EDX), high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Visible spectroscopy, fourier transform infrared (FTIR) spectroscopy, raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The fabricated ZnO NPs exhibit an average size of 35 nm, with a hexagonal nanostructure. Further, the well-characterized ZnO NPs were employed for the photocatalytic degradation of methylene blue (MB) in an aqueous solution. The photocatalytic activity was analyzed by changing the various physicochemical factors such as reaction time, amount of photocatalyst, precursor concentration, and calcination temperature of the ZnO NPs. All the studies suggest that the ZnO synthesized through the green protocol exhibits excellent photocatalytic potency against the dye molecules.

Department of Biochemistry and Molecular Biology School of Biological Sciences Central University of Kerala Kasaragod 671316 Kerala India

Department of Chemistry School of Physical Sciences Central University of Kerala Kasaragod 671316 Kerala India

Department of Medicine Thomas Jefferson University Jefferson Alumni Hall 1020 Locust Street Philadelphia PA 19107 USA

Institute for Nanomaterials Advanced Technologies and Innovation Studentská 1402 2 461 17 Liberec Czech Republic

Polymer and Functional Materials Department CSIR Indian Institute of Chemical Technology Tarnaka 500007 Hyderabad India

Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacky University Šlechtitelů 27 783 71 Olomouc Czech Republic

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