Investigation of antibacterial and photo catalytic efficiency of green ZnO nanoparticles that synthesized with Celosia Cristata flower extract

Abstract

Increasing interest in green chemistry has led scientists to an environmentally friendly nanoparticle synthesis approach that has many advantages, such as simple, affordable and versatility for a wide range of commercial production. In this study, green synthesis of zinc oxide nanoparticles (ZnO NPs), which is widely researched in the field of nanotechnology, was performed under different conditions (volume ratio of CC flower extract to Zn(CH 3 COO) 2 solution, time, pH and temperature) using the aqueous extract of Amarant (Celosia cristata L., CC, cockscome) plant flowers. Produced ZnO NPs were characterized by UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Highresolution transmission electron microscopy (HR-TEM) and Scanning electron microscopy (SEM) analysis. The characteristic absorption peak seen at λ max : 364 nm in the UV-Vis absorption spectrum and the band seen at 381 cm -1 in the FITR spectrum indicate that ZnO NPs were synthesized. TEM image also confirmed the formation of nanoparticles. The Staphylococcus aureus and Escherichia coli bacterial strains and were more effective against gram-positive pathogens. The findings displayed that the antibacterial activity of ZnO NPs is related to the particle size. This new environmentally friendly synthesis approach is a suitable technique for large-scale commercial production and can be considered as an alternative to chemical methods.

Biogenic Synthesis of Zinc Oxide Nanoparticles with Leaves and Cones Concentrate of Cupressus Arizonica and Assessment of Photocatalytic and Antibacterial Efficiency

“…The photodecolorization efficiency, symbolized by the color removel, was calculated by detecting the peak amplitudes at 553 nm, 679 nm, and 667 nm wavelengths for BR46, MB, and BB3, respectively (Figures 11,13,and 14). Peak amplitudes (1D values) in the recorded spectra for the BV39 dyestuff solutions (Figure 12) were measured at 572 nm for the purpose of determining the decolorization of BV39, whereas peak amplitudes (1D values) in the recorded spectra for the BY28 dyestuff solutions (Figure 15) were measured at 474 nm for the purpose of determining the decolorization of BY28.…”

“…Equation As observed in Figure 12 that the BV39 dyestuff did not adhere to CA-ZnO NPs due to adsorption, but the color was lightened as a result of photocatalytic degradation. When UV-Vis spectra of the other dyestuff solutions containing the same concentration of dye and photocatalyst (10 µg/mL dyestuff + 0.05 g CA-ZnO NPs) were examined, it was determined that the color decreased less and the adsorption phenomenon was also observed ( Figures 11,[13][14][15].…”