Green Synthesis and Characterization of Copper Nanoparticles Using Different Plant Sources

This research aimed at exploring eco-friendly green synthesis of CuNPs using different plant species used for research purpose were Nyctanthes arbor-tristris (Night jasmine), Gardenia jasminoides (Cape jasmine), Tabernaemontana divartica (Crape jasmine), Cascabela thevetia (Yellow oleander), Clerodendrum inerme (Glory bower), Hibiscus rosa-sinensis (China rose) and Allamanda cathartica (Allamanda) for synthesizing CuNPs. Out of seven ornamental plant species CuNPs were synthesized from three species viz. Night jasmine, Yellow oleander, Allamanda which were confirmed through UV-VIS spectrophotometer in wavelength 250-450 nm. The SPR peak was recorded at 301.00 nm, 300.50 nm and 300.00 nm for Allamanda, Yellow oleander and Night jasmine respectively that confirmed the formation of CuNPs. FTIR analysis of CuNPs showed different functional groups such as O−H, N−H, S−H, O=C=O, C≡C, C=O, N−O, C−H, M−O for Allamanda, O−H, N≡N, N−H, C−Cl for Yellow oleander and O−H, C−N, −C≡C−, =C−H, N−O for Night jasmine. DLS study revealed the average size of CuNPs as 125 nm, 120 nm and 100 nm for Allamanda, Yellow oleander and Night jasmine respectively. Zeta potential recorded for Allamanda, Yellow oleander and Night jasmine were -13.7 mV, -10.03 mV and -12.6 mV respectively. TEM micrograph clearly indicated that all the green synthesized CuNPs were spherical in morphology and the average size were 14.05 nm, 16.96 nm and 11.58 nm for Allamanda, Yellow oleander and Night Jasmine respectively.