The Green Synthesize of Zinc Oxide Catalyst Using Pomegranate Peels Extract for the Photocatalytic Degradation of Methylene Blue Dye

Abstract

In this study, the zinc oxide NPs have been synthesized from the fresh pomegranate peels extract using the precipitation method. The ZnO nanoparticles were produced from the reaction of fresh peels extract with zinc acetate salt which was used as zinc source in the presence of 2 M NaOH. The green synthesized nanoparticles were characterized through X-ray diffraction (XRD), UV-Vis diffuse reflection spectroscopy, Fourier transform infrared spectroscopy (FTIR), and Atomic force microscopy (AFM). The XRD patterns confirm the formation of hexagonal wurtzite phase structure for ZnO synthesized using pomegranate peels extract with average crystalline size of 28 nm. FTIR spectra identify the presence of many active functional groups for the pomegranate extract which is ideal to bind with zinc acetate to produce the ZnO nanoparticles during the preparation method. The reflection spectra of green synthesis ZnO with pomegranate extract observed a blue shift towards lower wavelength with (8 nm) difference compared to ZnO without the addition of any extract. The provenance of such blue shift towards shorter wave length was due to the quantum size effect. The Atomic force microscopic (AFM) result shows average roughness value for ZnO nanoparticles of 6.26 nm. The decolorization efficiency of the methylene blue dye was investigated using the ZnO nanoparticles under sun light irradiation and it was compared with the bare ZnO synthesized without the addition of extract. The catalytic activity was about 88% after 60 min of sunlight irradiation for both prepared catalyst however, the decolorization efficiency of ZnO with the addition of extract was higher at the first 16 min compared to bare ZnO.

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

“…The electrons in the CB have the status of reducing agents and are responsible for reducing the oxygen adsorbed on the surface of the ZnO nanophotocatalyst and generating active radicals and creating O 2− •. All these produced free radicals, and especially the OH•, attack the organic pollutants that are physically attached to the ZnO surface where photocatalytic degradation occurs and which are stimulated by light, rapidly converting them into harmless compounds such as CO 2 and H 2 O [ 24 , 44 ].…”

انماء تراكيب نانوية من أكسيد الزنك بطريقة التحلل المائي الحراري لقيم مختلفة من درجة الحامضية

“…ZnO has high chemical and thermal stability. It is also transparent to visible light 7,9,10 , has high conductivity 2.7 (S.cm -1 ) 11 at 25℃, and exhibits piezoelectric and pyroelectric properties. The properties of ZnO are highly dependent on the specific growth conditions 9,11 .…”

Isolation and Identification of Shigella SonneiProducing Shiga Toxin from Children with Bloody Diarrhea and Evaluation of the Inhibition Effectiveness of Zinc oxide Nanoparticles

“…HUS is usually associated with a shiga toxin which is found in Shigella strains [8]. Zinc oxide has been used in biomedical systems due to its low production cost, safe to use and can be easily prepared [9]. It has been reported in literature that nanoparticles can attack bacteria through six main mechanisms: (i) Destruction of cell wall (ii) Release of toxic ions (iii) Destruction of protons efflux pumps and modification of membrane charges (iv)Formation of reactive oxygen species (ROS) (v) DNA, RNA and proteins degradation by ROS, (vi) Drop ATP production [10].…”