Green synthesis of nano-titania (TiO2 NPs) utilizing aqueous Eucalyptus globulus leaf extract: applications in the synthesis of 4H-pyran derivatives
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We have presented the green synthesis and characterization of nano-titania (TiO2 NPs) by using Eucalyptus globulus leaf aqueous extract in a greener approach leading to their utilization as a catalyst in one-pot, three-component A3 coupling reactions. The composition of the as-prepared TiO2 NPs were confirmed by various analytical and spectroscopic techniques such as powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, dynamic light scattering analysis and specific surface area measured by Brunauer–Emmett–Teller analysis. TiO2 NPs exhibited a pure anatase phase structure with an average particle size of 12 nm.
KeywordsEucalyptus globulus leaf extract Green synthesis TiO2 NPs Catalysis Pyran derivatives
The authors gratefully acknowledge to VIT University, Vellore, for providing a platform and basic characterization facility to do this work. We are slso sincerely thankful to UGC-NRC (Networking resource center) of the School of Chemistry, University of Hyderabad, for providing all necessary facilities and financial assistance to the program, and the Centre for Nanotechnology Research for providing the TEM facility for carrying out this work. We are slso sincerely thankful to ESAB INDIA-ESD Division, R&D Filler metals, Ambattur, Chennai, for the employment and financial support to successfully complete this research work.
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