Appraisement of antimicrobial zinc oxide nanoparticles through Cannabis Jatropha curcasa Alovera and Tinosporacordifolia leaves by green synthesis process

The production of zinc oxide nanoparticles (ZnO NPs) utilizing different vegetable extracts (onion, cabbage, carrot, and tomato) was performed in this research owing to its excellency over other methods of synthesis, namely, simplicity, environmental friendliness, and the elimination of harmful compounds. Fresh extracted onion, cabbage, carrot, and tomato of ZnO NPs are characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-visible spectroscopy. FTIR findings demonstrate that the prepared nanoparticles were observed in the spectrum of 626 cm-1–1219 cm-1 with some other functional groups. Wurtzite hexagonal structure of the prepared ZnO NPs was observed from XRD results. In addition, the prepared nanoparticles were failed into nanoscales (17 nm, 18 nm, 24 nm, and 15 nm) calculated from Scherrer’s equation. Nearly spherical shapes were seen from SEM image for onion and tomato extraction while rod and tube for carrot and cabbage, respectively. Two broad peaks were observed from UV-vis spectroscopy results for each extract. The presence of a wide range of energy bandgaps in the region of 3-4 eV was detected, indicating that ZnO NP material can be employed in metal oxide semiconductor-based systems. The dye-sensitive solar cell based on ZnO NPs has been successfully synthesized, and the efficiency of the device has been evaluated by measuring the current density-voltage behaviour under the presence of artificial sunshine. The increased effectiveness of the manufactured dye-sensitive solar cell is attributable to a large improvement in dye molecular adsorption onto the surface of ZnO NPs. Thus, the usage of the green produced ZnO NPs with creating dye sensitivity solar cell is a simple and viable way for the well-being of our future.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Green Synthesis, Characterization of Zinc Oxide Nanoparticles, and Examination of Properties for Dye-Sensitive Solar Cells Using Various Vegetable Extracts

Degefa¹,

Bekele²,

Jule³

et al. 2021

“…Furthermore, green extracts produce several biomolecules, including carbohydrates and proteins; accompanying prime metabolites and secondary metabolites that have been linked to the elimination of metal ions and stability has been linked to nucleic acids [31][32][33][34][35][36][37][38][39][40]. Not only antimicrobial agents but also green synthesis is also needed for environmental pollution protections by developing and adopting benign eco methods [41][42][43][44][45][46][47][48][49][50].…”

Section: Resultsmentioning

confidence: 99%

Green versus Chemical Precipitation Methods of Preparing Zinc Oxide Nanoparticles and Investigation of Antimicrobial Properties

Bekele¹,

Degefa²,

Tesgera³

et al. 2021

Comparison of green and chemical precipitation method syntheses of zinc oxide nanoparticles (ZnO NPs) was performed, and antimicrobial properties were investigated. Avocado, mango, and papaya fruit extracts were carried out for the green synthesising methods, while the chemical precipitation method was chosen from chemical synthesis methods. Zinc nitrate was used as a salt precursor, whereas leaf extract was served as a reducing agent for green synthesising methods. In addition, sodium hydroxide, polyvinyl alcohol, and potassium hydroxide were used as reducing agents in the case of chemical precipitation synthesis methods. ZnO NPs were characterised by characterizing techniques such as Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The antimicrobial activities of prepared nanoparticles were evaluated on Bacillus subtilis (B. subtilis), Staphylococcus aureus (S. aureus), and Salmonella typhimurium (S. typhimurium). The particle sizes of the prepared samples which were evaluated by the Scherrer equation were in the range of 11-21 nm for green synthesis, while 30-40 nm for chemical precipitation synthesis methods. Small agglomerations were observed from SEM results of prepared ZnO NPs from both methods. Prepared ZnO NPs were showed strong antimicrobial properties. From the result, the inhibition zone was in the range of 15-24 mm for the green route and 7–15 mm for chemical precipitation methods, where the standard drugs have 25 mm of the zone of inhibition. A green synthesised method of preparing ZnO NPs gives promising antimicrobial properties compared to chemical synthesis and is also eco-friendly and safe compared to the chemical synthesis.

“…Chemical techniques of synthesis of NPs are also excessive in the atmosphere [6]. So, for many causes, mainly for eco-friendly benefits, the green synthesis techniques or green preparation of NPs has been deliberated by scholars [7]. In these new techniques (i.e., green deposition), plants, microbiology, or fungus serve as the root to depose NPs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Zinc Oxide Nanoparticles Using Moringa Leaf Extract

Saka¹,

Tesfaye²,

Nagaprasad³

et al. 2021

This paper investigates the technique of biosynthesis of nanoparticles of zinc oxide from the extraction of moringa leaves. Many researchers recognize the use of this method of green culinary technique because it is cost-effective and has no negative impact on the environment; however, this paper focuses on the bacteria chosen for the green synthesis, which was not addressed by many of the researchers. The firmness and reduction of Zn ions in nanoparticles of zinc oxide were analyzed with a UV-visible spectroscope. Its results show that a wide bandgap was observed in the visible region at a wavelength of 350 nanometers. Extraction of moringa leaves serves as a promising agent for the balance of particle size. The result of medical value shows significant antibacterial activity in contrast to the type of pathogenic bacteria Escherichia coli and Staphylococcus aureus. From the XRD results, there are no further peaks that correspond to impurities that are discovered, demonstrating the great purity of the provided results.