Green Synthesis and Characterization of Zinc Oxide Nanoparticles Using Mulberry Fruit and Their Antioxidant Activity

Abstract

Biosynthesis of metal-oxide nanoparticles using plant extracts has been attracting increasing interest. In this study, we focused on the green synthesis of zinc oxide (ZnO) nanomaterials using zinc acetate as a precursor and mulberry fruit extract as a green reducing agent and determined the antioxidant activity. Powder X-ray diffraction and UV-Vis and Fourier Transform Infra-Red (FT-IR) spectroscopy were used for structure elucidation and to determine the crystallinity of the synthesized product. The morphology of samples was determined using Scanning Electron Microscopy (SEM). Our results indicated the successful synthesis of ZnO nanoparticles. SEM findings revealed the nanoparticles to be spherical; they were found to agglomerate and showed a narrow space between particles, which could be indicative of improved activity. The antioxidant activity of ZnO nanoparticles was determined using a 2,2-Diphenyl-1-Picryl-Hydrazyl (DPPH) free-radical scavenging assay taking into account time and concentration. Our results indicated that ZnO nanoparticles with mulberry fruit extract that were synthesized using green chemistry could effectively scavenge the free DPPH radicals, thereby confirming their superior antioxidant activity.

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

“…The collected precipitate was dried in a hot air oven at 100 °C for 2 h. The dried samples were kept in a desiccator for further evaluation. The nano production of CuO nanoparticles was displayed in Scheme 1 [11][12][13][14][15].…”

“…It takes a long time to make nanoparticles with help from microorganisms, and it often makes things that aren't supposed to be there. As a way to get around the above problem and make synthesis easier and more ecofriendly, most of the researchers used plant mediate (plant extracts from leafy peels, flowers, fruit, and roots) [8][9][10][11]. This could be called green synthesis or 'eco-friendly synthesis.'…”

“…The present work reports the Mulberry plant extract reaction on the copper sources and it can be highly applicable in medicine for developing the drugs. Mulberry is used to improve digestion, lower cholesterol, support the immune system, regulate blood sugar levels, and improve vision [11]. Due to their enrichment of antioxidants can be used in the fracture healing process.…”

Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract

“…The red shift of the absorption peak might be attributed to the capability donation of free electrons to the copper vacant orbital facilitated by the electron transition [ 68 ] at higher calcination temperature and resulting in a lower energy bandgap [ 44 , 66 ]. The broad peak extending from 259–462 nm suggests that the distribution of particle size is large [ 7 ]. The broadest absorption peaks were observed for synthesized CuO NPs calcinated at 600 °C, representing polydispersion [ 69 ] of NPs and indicating the NPs production was in various sizes [ 8 ].…”

“…Compared to pure metal, metal oxide is more complex as it has bonding varying from nearly ionic to highly covalent and even metallic bond in nature; it comes in different forms with each posing unique compositions, morphologies, structures and physicochemical properties [ 6 ]. Different from their bulk form, nanoparticles (NPs) are able to provide a new and promising solution, using their unique features as they have high surface area-to-volume ratio with unique physicochemical properties [ 7 , 8 , 9 , 10 , 11 , 12 ] widely applied in electronic and solar energy devices, medicinal, environmental remediation, consumer products and catalysis [ 13 , 14 , 15 , 16 , 17 ]. Among the metal oxide NPs, synthesis of CuO NPs are promising as they are cheaper than other Nobel metals [ 18 , 19 ] and can be easily mixed with polymers due to their stability [ 20 ].…”