Magnetic Mg0.5Zn0.5FeMnO4 nanoparticles: Green sol-gel synthesis, characterization, and photocatalytic applications

The inhibitory role of synthesized Nickel oxide nanoparticles against Hep-G2, MCF-7, and HT-29 cell lines: the inhibitory role of NiO NPs against Hep-G2, MCF-7, and HT-29 cell lines

“…The Raman spectra of samples were recorded and demonstrated in Figure 4. According to Mironova-Ulmane report (35), the Raman spectrum exhibits several bands for bulk NiO at room temperature, as follows; a one-magnon (1M) band at ∼34 cm −1 ; five vibrational bands that include one-phonon (1P) TO at 440 cm −1 and LO at 560 cm −1 modes, two-phonon (2P) 2TO at 740 cm −1 , TO + LO at 925 cm −1 and 2LO at 1100 cm −1 modes; a two-magnon (2M) band at ∼1500 cm −1 . Figure 4 shows two Raman peaks that indicate the intensity of absorption peaks are proportional to the annealing temperature and size distribution.…”

“…The majority of these procedures are very costly and boring protocols, very complex tools, and poisonous and non-eco-friendly ways for producing NPs. In order to solve the challenge of poisonous wastes, energy disparity, and for the sake of biocompatibility, an eco-friendly and greener procedure for the development of nanoparticles has been proposed (35)(36)(37)(38)(39)(40)(41)(42). Biodegradable materials such as microorganisms (MOs), fungi, and plants can be utilized to form NPs, among which the extracts of plants have more and more become prevalent nowadays (27,43).…”

Plant‐Mediated Green Synthesis of Magnetic Spinel Ferrite Nanoparticles: A Sustainable Trend in Nanotechnology

“…Microorganisms such as algae, [47][48][49][50] fungi, [51][52][53][54][55] yeast, [56][57][58][59] bacteria, [60][61][62][63] viruses, [64] and other natural biological materials are utilized to design "green" spinel ferrite nanoparticles (Figure 7). However plants [65][66][67][68][69][70] has sparked great attention in recent years due to their low cost, renewability, low cytotoxicity, and easy processing [71][72][73] to synthesize ferrite nanoparticles. Phytochemicals present in the plant extracts play a major role in reducing metal salts to metal oxide nanoparticles.…”

Development of Three-Dimensional Nickel–Cobalt Oxide Nanoflowers for Superior Photocatalytic Degradation of Food Colorant Dyes: Catalyst Properties and Reaction Kinetic Study

“…Recently, transition-metal oxide (TMO) nanomaterials have displayed various attractive, dimensional, and morphological properties for diverse applications in research fields such as chemistry, materials science, physics, and biology. − Recently, Fardood et al have investigated various mixed TMOs for a large number of dye-degradation reactions under ambient conditions. ,,,, Among the TMOs, Co 3 O 4 has played a promising role as a p-type semiconducting material which is widely used as photocatalyst or photoanode material for electrochemical and solar energy applications. − The magnetic properties of Co 3 O 4 nanomaterials might originate because of spin–orbit coupling of unpaired electrons in partially filled orbitals of Co 2+ cations. Owing to fully filled t 2g 6 orbitals, Co 3+ cations display zero magnetic moment after the 3d splitting by the low-spin octahedral crystal field. , Among binary metal-oxide nanomaterials, nickel–cobalt oxides are well-known p -type semiconducting nanomaterials which have an energy band gap in the range of ∼1.48 to ∼2.30 eV to tune their electronic, optical, surface morphological, and magnetic properties. − Moreover, nickel–cobalt oxides are cost-effective, naturally abundant, less toxic materials with a variety of morphologies and high redox properties resulting in wide range of optical and electronic applications. − In general, cobalt based nanomaterial possesses versatile fascinating properties including low toxicity, magnetic nature, high stability, and excellent chemical reactivity because of variable oxidation states, for example, a spinel crystal geometry which are suitable for electrochromic, sensor, and catalytic applications. − Furthermore, binary nickel–cobalt oxide (NiCo 2 O 4 , NCO) nanomaterials exhibit a spinel crystal structure where Ni cations reside in octahedral positions only, while Co cations spread on octahedral and tetrahedral positions of the crystal lattice, simultaneously. , NiCo 2 O 4 inherits many intriguing properties such as eco-friendly synthesis, a porous surface morphology, high surface area, and excellent stability to ensure high performance as an electrode material . Recently, NiCo 2 O 4 has been reported to possess distinct morphologies such as nanorods, nanowires, and nanosheets, which are tuned by their synthetic approaches. , …”