Nanoparticles green synthesis by Hibiscus Sabdariffa flower extract: Main physical properties

Antimicrobial potential of green synthesized CeO₂ nanoparticles from <em>Olea europaea</em> leaf extract

“…1 In brief, the bacterial strains were cultured in nutrient broth (Sigma-Aldrich Co., St Louis, MO, USA) at 37°C until the culture reached 1.5×10 8 colony forming units (CFU) per milliliter. About 20 mL of autoclaved molten nutrient agar was poured into the Petri dishes and allowed to cool.…”

“…In bulk form, CeO 2 is a singular rare earth oxide and does not show any crystallographic modifications by temperature increase up to its melting point. [1][2][3][4][5] Its various applications such as acting as a catalyst; use in sensor, solid oxide fuel cells, and sunscreen cosmetics; and its O 2 storage capacity, role in CO 2 solar conversion, and antibacterial applications are due to its idiosyncratic ability to alter the oxidation states. [6][7][8][9][10] Ordinarily, CeO 2 NPs are fabricated by physical and chemical methods including hydrothermal, 11 flame spray pyrolysis, 12 thermal decomposition, 13 aqueous precipitation, 14 and coprecipitation technique.…”

Green synthesis of Co3O4nanoparticles viaAspalathus linearis: Physical properties

“…The precipitate was then separated from the aqueous extract, first by decanting then by centrifuging at 1000 rpm 3 times for 10 min each over successive additions of de-ionized water to wash the precipitate of any residual aqueous extract. As the synthetized oxides-based nanoparticles by green process are generally amorphous, an annealing was necessary to induce an effective crystallization (23)(24)(25)(26)(27)(28)(29)(30)(31)(32). In this case, the asobtained centrifuged precipitate was heated at 90°C for 90 min to remove bio-compounds in excess.…”

“…Figure 7 shows the typical XPS spectrum of the annealed Cobalt oxide nanoparticles. (28)(29)(30)(31)(32); the mechanism of formation of such nanoparticles is not understood and is being investigated using in situ and ex situ High Performance Liquid Chromatography and Liquid Chromatography Mass Spectrometry. As mentioned previously, A. Linearis leaf extract contains, among others, two unique phenolic compounds: aspalathin (a dihydrochalcone C-glucoside) and aspalalinin (a cyclic dihydrochalcone).…”

Artemisia herba-alba Asso eco-friendly reduced few-layered graphene oxide nanosheets: structural investigations and physical properties

“…Different nanoparticles derived from silver, nickel, cobalt, zinc, copper and Indium oxide have also been synthesized using plants extracts of Brassica juncea L. (Indian mustard), Medicago sativa L. (Alfalfa), Helianthus annuus L. (Sunflower) and Aloe barbadensis (56,57). Furthermore, our present research team has also synthesized many nanomaterials using eco-friendly processes (58)(59)(60)(61)(62)(63)(64)(65).…”