Space Group Fm3m Research Articles

Synthesis and structural characterization of nanocomposites ZnO/CdO prepared by sol-gel method

The present paper report the formation of ZnO/CdO composites via the Sol-Gel technique. The synthesized sample is dried in air and annealed at 300 °C. The heat-treated sample is powdered and structure characterization of obtained powder composite is investigated through X-ray diffraction (XRD) and Rietveld refinement techniques. The crystal structure, morphology, and composition of the powder composite were analyzed in detail. XRD diffractograms were obtained through X-ray diffraction and the Rietveld refinement method is used to estimate the crystalline phases present in the sample using XRD results. The refinement of the prepared samples was done by Fullprof Suite Software. The analysis of diffractograms gives the crystalline nature and refinement gives the presence of ZnO and CdO phases. XRD data was used to find the size and the crystallite size estimated for ZnO is 38.35 nm, and for CdO is 44.09 nm. Refinement suggests that ZnO is hexagonal with space group P36mc (186), while CdO is cubic with space group Fm-3 m (225). Lattice parameters calculated for ZnO are found to be a = b = 3.250, c = 5.213, α = β = 90°, and γ = 120°, and for CdO lattice parameters are found as a = b = c = 4.694, α = β = γ = 90°. The dislocation density of ZnO and CdO is calculated as 0.001012 m/m3 and 0.00081 m/m3. Lattice strain of composite is calculated by W-H plot and found to be (2.06 ± 0.876614) * 103.The inter-atomic distance and Wyckoff positions are also estimated.

Investigation of thermoelectric response, mechanical stability and thermodynamic behavior of Sr2MgPdO6 and Sr2MgPtO6 double perovskites: A DFT insights

The Density Functional Theory (DFT) study of Sr2MgPdO6 and Sr2MgPtO6 double perovskite compounds has been carried out to explore the properties of these materials and their nature. It was observed that these compounds are formed into crystals of cubic perovskite structural arrangement which resides with the Fm-3m (No.225) space group. Electronic band structure confirmed that these double perovskite oxides are semiconductors in nature. The estimated elastic constants and other mechanical parameters confirmed the ductile nature of Sr2MgPdO6 and Sr2MgPtO6. The thermodynamic properties include entropy, internal energy, specific heat, and vibrational free energy are observed for these double perovskites. Using BoltzTrap software, the thermoelectric behavior of these materials has been investigated by calculating electrical conductivity and electronic thermal conductivity concerning scattering time, and Seebeck-coefficient. Power factor and figure of merit are also calculated with the help of these parameters to check the applicability of the materials for waste heat recovery systems and advanced technologies.

Synthesis, structural, morphological and optical properties of environment friendly yellow inorganic pigment Bi4Zr3O12

This study reports on the structural, morphological, microstructural, electronic and optical properties of 5 nm (annealed at 300 °C) and 8 nm (annealed at 500 °C) sized nanocrystals of yellow inorganic pigment Bi4Zr3O12 prepared by sol-gel auto-combustion technique. Increase in the annealing temperature from 300 °C to 500 °C does not led to structural phase change but results in minor shifts in the 2θ position of Bragg peaks towards the higher angle side, which is attributed to reduction in the unit cell volume due to well crystallization. Phase pure formation and well crystallization of 8 nm sized Bi4Zr3O12 pigment in the fluorite type fcc symmetry in the space group Fm3‾m (No. 225) have been revealed first time by detailed Rietveld profile refinement of the X-ray diffractogram, FTIR, SAED and HRTEM analysis. The FESEM micrographs showed micro-flower type morphology of the rod shaped nanocrystals of the Bi4Zr3O12 pigments. EDS and XPS analysis confirmed the stoichiometry of the constituent elements present in the Bi4Zr3O12 pigments. XPS analysis evaluated +3, +4 and −2 oxidation states of the Bi, Zr and oxygen ions respectively and also rule out presence of organic species in the two pigments. ESR, Fluorescence and XPS analysis affirmed formation of oxygen vacancies in the two pigments. UV–Vis–NIR optical reflectance data showed marginal increment in the optical band gap upon raising the annealing temperature but 8 nm sized Bi4Zr3O12 nanocrystals have shown greater reflectance in comparison to 5 nm sized Bi4Zr3O12 nanocrystals. The photoluminescence spectroscopic analysis and CIE coordinates along with CCT values showed that yellow Bi4Zr3O12 pigment could be useful for optical devices and yellow pigment applications.

Degradation of Crystal Violet Using Gadolinium Zirconium Oxide (Gd2Zr2O7) Nanoparticles

The demand for clean water free of pollution has become an urgent priority for humanity. Gd2Zr2O7 nanoparticles were successfully synthesized via sol–gel auto combustion as a type of pyrochlore to be used in the dye phytoremediation using a Fenton-like approach. Gd2Zr2O7 nanoparticles have been successfully prepared using a sol–gel auto-combustion strategy. The annealing process was performed in a furnace at 1100 °C for 2 h to form defect-fluorite structured Gd2Zr2O7 with space group Fm-3m. XRD analysis revealed that synthesized Gd2Zr2O7 nanoparticles were found to have crystallite sizes with lattice parameters of 28.5 nm and 10.524 + 0.02 Å, respectively. TEM micrographs showed the presence of a cubic-like structure with a size of about 17 nm. The band gap energy of the synthesized powders was found to be 3.8 eV relating to the impact of the crystallite size. The generated nanoparticles finally show a significant photo Fenton catalytic activity with an efficiency of 90% for the photocatalysis of crystal violet dye after 60 min. It was determined that the substantial absorption of Gd2Zr2O7 in the visible-light region, which was synergistically activated by both Gd3+ and Zr4+ ions, was the cause of the large surface area of the scattered microstructure and reactive OH. formation.

Density functionl theory study of Cs2InAgCl(6-x)Brx (x = 0–3) halide double-perovskites

Halide double perovskites have recently received much attention due to their application in optoelectronic devices. Cs2InAgCl6 is an exciting compound with a cubic unit cell, Fm-3m space group, and a direct band gap of about 3 eV. This research studied the effect of Br ion doping instead of Cl with the combination of Cs2InAgCl(6-x)Brx (x values between 0 and 3) using density functional theory (DFT) calculations with GGA approximation and norm-conserving pseudopotentials of PBE type. We found that with an increase in Br concentration, the investigated compounds retain their cubic phase. The compounds' calculated lattice constants and band gaps were about 10.44–10.71 Å and 2.12–0.62 eV, respectively. The accurate band gap values were obtained between 3.16 and 1.68 by HSE06 hybrid functional as exchange-correlation. The calculations of the band structure and density of states indicate the direct electron transition from the valence band to the conduction band at the gamma point of the Brillouin zone of the studied compounds. The studied compounds' optical properties show high absorption in the visible and ultraviolet regions, appropriate optical conductivity, and refractive index.

Structural, Thermal, and Electrochemical Properties of Ce 0.8−2x Sm 0.2 Zrx Mgx O2−d, {x = 0.05, 0.1 & 0.15} Promising Electrolyte Compounds for (IT-SOFCs) Applications

CSZM compounds were synthesized by dry chemistry route with 5, 10, and 15% dopant of Mg dopants in the Ce 0.8−2x Sm 0.2 Zrx Mgx O2−d, {x = 0.05, 0.1 & 0.15}. The newly investigated materials were physically, chemically, and electrochemically studied and have shown promising results. The CSZM was crystalized in a fluorite structure with a pure cubic phase in a space group Fm3m and cell parameter a = 5.401742 °A and theoretical density from 7.6 to 8.9 after firing in the air with a final temperature of 1400 °C. Characterization of the structure and indexing of electrolyte materials were made after X-ray diffraction (XRD) testing. A Scanning electron microscope (SEM) morphological analysis was used to examine the microstructure details. Electrochemical impedance spectroscopy (EIS) measurements were performed from 400 °C to 700 °C which show the highest conductivity value of 1.0461 × 10+1 S/cm at 700 °C. In comparison, the minimum value was 2.7329 × 10−2 S/cm at 400 °C, and the total activation energy (Ea°A) was found to be 0.6865 eV under 5% H2/Ar.

Green synthesis of cerium oxide nanoparticles using zucchini peel extract for cytotoxic and photocatalytic properties.

The aim of this study is the green synthesis of cerium oxide nanoparticles (CeO2-NPs) using a natural capping agent and its application in water and wastewater treatment. This study presents the biosynthesis of CeO2-NPs by the exertion of a green method using zucchini (Cucurbita pepo) extract as a capping agent. Synthesized CeO2-NPs were distinguished through TGA/DTA, FT-IR, XRD, FESEM/TEM and EDX/PSA, and DRS procedures. According to the XRD pattern of NPs, the crystallinity structure was a face-centered cubic (fcc) with an Fm3m space group and the size was estimated at 30nm. The spherical morphology of NPs was confirmed through FESEM/TEM images. In the following, the photocatalytic property of NPs was investigated by the decolorization of methylene blue (MB) dye within UV-A light. Also, the cytotoxicity of NPs on the CT26 cell line was evaluated through the MTT test, and no toxicity was observed in the results, which indicates their biocompatibility.

Synthesis and magnetic properties of Ba2-xSmxFeMoO6 (0.0 ≤ x ≤ 0.1)Double perovskite

Double perovskite oxide compounds Ba2-xSmxFeMoO6 (0.0 ≤ x ≤ 0.1) have been synthesized by the sol-gel method. The effect of heat treatment on the synthesis of single-phase double perovskite Ba2FeMoO6 (BFMO) was investigated under H2/Ar at various temperatures. Their crystal structure has been explored through X-ray diffraction patterns (XRD). The Rietveld refinement described a cubic structure with an Fm-3m space group for the sample that was annealed at 900 °C. X-ray photoelectron spectroscopy (XPS) analyses showed that the average valence of Oxygen was obtained to be about −1.59 and −1.49 for the samples x = 0.0 and x = 0.05, respectively and the samples probably do not have mixed valences. Fourier transform infrared (FTIR) spectra exhibited a shift in the peak positions by doping Sm3+. Along with magnetization and ac susceptibility data, FESEM images were examined. By adding Sm+3 ions, the samples' morphology underwent a noticeable shift. The samples' transition temperature (Tc∼304–316) was calculated using the fictitious component of sensitivity. The degree of cationic ordering on the B site improved, and the variation of Curie temperature became nonlinear as doping rose.

Recent trends of ternary, quaternary half-Heusler thermoelectric materials and contact resistance effect on their power output efficiency

Climate change isone of the most pressing global issues, owing to the high carbon footprint generated during conventional power generation via coal consumption and gasoline-fuelled exhaust. Furthermore, nearly half of thetotal energy is lost as heat. Suitable thermoelectric (TE) devices can convert waste heat into green/clean energy. Moreover, these devices have no moving parts, require no maintenance, and are environmentally friendly. A better TE device's thermoelectric performance (zT) should be highly cost-effective for process scaling. Because of their low cost, narrow band gap, better contact engineering, decent electrical properties, and high mechanical performance, Half-Heusler (HH) compounds (space group Fm-3 m) have been considered the best candidate materials worldwide. However, these materials have a high thermal conductivity. The high thermoelectric performance of HH compounds was achieved through iso-electronic doping and nanostructuring, which reduced thermal conductivity significantly. The current report briefly overviews17, 18, 19, and 21 valence electron count (VEC) HH materials and their effects on thermal conductivity and zT. Finally, using cumulative temperature dependence (CTD) and constant property models (CPM), the theoretical estimation of power density and efficiency was calculated by considering the materials' thermoelectric performanceand contact resistance.

Synthesis and Characterization of a New Alginate/Carrageenan Crosslinked Biopolymer and Study of the Antibacterial, Antioxidant, and Anticancer Performance of Its Mn(II), Fe(III), Ni(II), and Cu(II) Polymeric Complexes.

Natural polysaccharides are essential to a wide range of fields, including medicine, food, and cosmetics, for their various physiochemical and biological properties. However, they still have adverse effects limiting their further applications. Consequently, possible structural modifications should be carried out on the polysaccharides for their valorization. Recently, polysaccharides complexed with metal ions have been reported to enhance their bioactivities. In this paper, we synthesized a new crosslinked biopolymer based on sodium alginate (AG) and carrageenan (CAR) polysaccharides. The biopolymer was then exploited to form complexes with different metal salts including MnCl2·4H2O, FeCl3·6H2O, NiCl2·6H2O, and CuCl2·2H2O. The four polymeric complexes were characterized by Fourier-transform infrared spectroscopy (FT-IR), elemental analysis, ultraviolet-visible spectroscopy (UV-Vis), magnetic susceptibility, molar conductivity methods, and thermogravimetric analysis. The X-ray crystal structure of the Mn(II) complex is tetrahedral and belongs to the monoclinic crystal system with the space group P121/n1. The Fe(III) complex is octahedral and crystal data fit with the cubic crystal system with the space group Pm-3m. The Ni(II) complex is tetrahedral and crystal data correspond to the cubic crystal arrangement with the space group Pm-3m. The data estimated for the Cu(II) polymeric complex revealed that it is tetrahedral and belongs to the cubic system with the space group Fm-3m. The antibacterial study showed significant activity of all the complexes against both Gram-positive bacteria (Staphylococcus aureus and Micrococcus luteus) and Gram-negative (Escherichia coli and Salmonella typhimurium) pathogenic strains. Similarly, the various complexes revealed an antifungal activity against Candida albicans. The Cu(II) polymeric complex recorded a higher antimicrobial activity with an inhibitory zone reaching 4.5 cm against Staphylococcus aureus bacteria and the best antifungal effect of 4 cm. Furthermore, higher antioxidant values of the four complexes were obtained with DPPH scavenging activity varying from 73 to 94%. The two more biologically effective complexes were then selected for the viability cell assessments and in vitro anticancer assays. The polymeric complexes revealed excellent cytocompatibility with normal human breast epithelial cells (MCF10A) and a high anticancer potential with human breast cancer cells (MCF-7) which increase significantly in a dose-dependent manner.

Density functional theory study of structural, electronic, optical, mechanical, and thermodynamic properties of halide double perovskites Cs2AgBiX6 (X = Cl, Br, I) for photovoltaic applications

In recent years, double perovskite materials have been considered potential candidates for different applications. Therefore, in this study, we investigated the structural, electronic, optical, and mechanical properties of Cs2AgBiX6 (X = Cl, Br, I) double perovskite materials based on first-principles calculations. All properties were evaluated using the LDA + U technique in the CASTEP code. According to the values of the octahedral factor and tolerance factor, Cs2AgBiX6 (X = Cl, Br, I) possesses a cubic structure with the space group Fm3m (225). The lattice constants were evaluated as 7.7579 Å, 8.1264 Å, and 8.6814 Å for Cs2AgBiCl6, Cs2AgBiBr6, and Cs2AgBiI6, respectively. The tolerance factor and octahedral factor confirmed their structural stability. The electronic properties indicate that the double perovskite materials are semiconductors. The energy band gaps were calculated as 2.02 eV, 1.53 eV, and 1.00 eV for Cs2AgBiCl6, Cs2AgBiBr6, and Cs2AgBiI6, respectively. The optical properties of Cs2AgBiX6 (X = Cl, Br, I) were calculated and discussed in the photon energy range of 0–25 eV to explain the interaction between light and matter. Assessment of the mechanical properties showed that the materials are ductile in nature. The theoretical power conversion efficiencies were calculated as 21.74%, 30.95%, and 30.03% for Cs2AgBiCl6, Cs2AgBiBr6, and Cs2AgBiI6, respectively. Our analysis of the electronic and optical properties demonstrates that these double perovskite materials are suitable for photovoltaic and optoelectronics applications.

EFFECT OFTHE SUBSTITUTION OF Bi→Sb ON THE STRUCTURE CHANGES WITHIN THE AgBi1-xSbxS2 (x = 0 - 1) SOLID SOLUTION

The work is devoted to study effect of the isovalent substitution on the parameter of structure elements of the crystal structure of the AgBi1-xSbxS2 (x = 0 – 1) solid solution. The limited isostructural phases of the solid solution have a cubic system with space group Fm-3m. The samples of individual composition of the AgBi1-xSbxS2 (x = 0 – 1) solid solution were obtained in quartz vacuumed ampoules in an electric muffle furnace with MP-30 software control of technological processes. The X-ray powder diffractograms that were recorded with using the DRON 4-13 diffractometer have been analyzed using WinCSD software package. The visualization of the crystal structure has been made with VESTA program. It is worth noting that the method of solid phase reactions allows synthesizing sufficiently pure materials, which are suitable for the measure of physical properties. The change of cell parameters within a solid solution is described by a positive deviation from the Vegard’s law. Only all octahedral voids are filled in the structure. It is important to see the prospect of possible alloying by atoms with small atomic radii, which may be localized in tetrahedral voids. The change of volume of the octahedral voids is linear.
 Keywords: crystal structure; solid solution; unit cell.

Theoretical insight of stabilities and optoelectronic properties of double perovskite Cs2CuIrF6: Ab-initio calculations

In this study, we predict the stability, elastic, electronic and optical properties of double perovskite (DP) Cs2CuIrF6. The detailed investigation of electronic structure and optical properties to find the suitability of DP Cs2CuIrF6 for device applications. From the structural optimization results, the stability of DP (Cs2CuIrF6) is in cubic order and belongs to the Fm-3m space group (#225) with a nonmagnetic (NM) state. Additionally, the elastic results show that this DP is mechanically stable in a cubic and ductile manner. Further, we explain in detail the semiconducting nature of the proposed DP with the help of electronic structure and density of states (DOS). The electronic band gap of DP Cs2CuIrF6 is 0.72eV (LV-XC). The optical part discussion, like the dielectric function ε, reflectivity R, refractive index n, absorption coefficient α and optical conductivity σ up to 13.00eV. The studied compound is explored as a potential candidate for optoelectronic applications. The density functional theory (DFT) within generalized gradient approximation (GGA) scheme of Perdew, Burke and Ernzerhof (PBE) as implemented in Wien2k computational code is utilized to achieve stable structure, elastic, electronic and optical properties of this material. The dynamic stability of this material was studied using the finite displacement method implemented in the CASTEP computational code. The elastic results have been computed by the IRelast package implemented in the Wien2k computational code.

Single-Phase High-Entropy Carbides Synthesized from a Mixture of Pre-Mechanically Alloyed TiZrHfTaNb HEA Powders and Carbon

In this paper, single-phase chemically homogeneous high-entropy ceramics (HEC) were synthesized from a mixture of pre-mechanically alloyed TiZrHfTaNb high-entropy alloy (HEA) powders and carbon. Mechanical alloying (MA) of a TiZrHfTaNb alloy with different process times made it possible to obtain a powder with uniform distribution of chemical elements and with the main phase in the form of a body-centered cubic (BCC) solid solution. HEC with the chemical formula MeC and space group Fm-3m begins to form at temperatures of about 1600 °C in the process of sintering a mixture of pre-mechanically alloyed HEA powders and carbon. A detailed study of the diffraction patterns revealed peaks of mixed zirconium-hafnium oxide (ZrHf)O2, which is also confirmed by the microstructure analysis results and distribution elements. Increasing the process temperature to 2000 °C leads to the formation of a single-phase and chemically homogeneous (TiZrHfTaNb)C HEC.

Mechanistic insights into antibacterial and anti-biofilm activities against multidrug-resistant microbes of SnTe nanospheres synthesized by sonochemical method

The sonochemical method is used to synthesize SnTe nanoparticles (Nps). Elemental analyses validated the stoichiometry of the nanoparticles. The phase and structure of the unit cell are verified by X-ray diffraction which shows nanoparticles are SnTe phase and a cubic crystal structure with a unit-cell lattice parameter of 6.31 Å having Fm-3m space group (No. 225), with Z = 4. The spherical form of nanoparticles is confirmed by electron microscopy. The Raman investigation showed a distinctive peak at 128.10 cm−1 connected to SnTe. The HR-TEM scans demonstrate that the Nps has size ranging between 25 and 30 nm and SnTe phase is confirmed by match of fringe pattern d-spacing. The SnTe Nps showed antibacterial properties through the formation of biofilms. The as-synthesized nanoparticles showed an efficient anti-microbial effect on staphylococcus aureus (MTCC 9542), listeria monocytogenes (MTCC 657), and proteus vulgaris (MTCC 426) bacteria. The study showed 100% growth suppression after 24 h of treatment with SnTe Nps, demonstrating the antimicrobial efficacy of SnTe Nps. The MIC (IC50) of 20 μg/mL for staphylococcus aureus is found to be resistant to the SnTe Nps effective anti-biofilm action. Based on these results, the authors looked into the feasibility of coating surfaces with the sample to prevent the growth of biofilms.

Can NbO Keep nbo Topology under Electrons? -Unveiling Novel Aspects of Niobium Monoxide at the Atomic Scale.

A precise investigation of NbO has been carried out by advanced electron microscopy combined with powder and single crystal X-ray diffraction (XRD). The structure of pristine NbO has been determined as Pm-3 m space group (SG) with a = 4.211 Å and the positions of Nb and O at the 3c and 3d Wyckoff positions, respectively, which is consistent with previous report based on powder XRD data. Electron beams induced a structural transition, which was investigated and explained by combining electron diffraction and atomic-resolution imaging. The results revealed that the electron beam stimulated both Nb and O atom-migrations within each fcc sublattice, and that the final structure was SG Fm-3 m with a = 4.29 Å, Nb and O at the 4a and 4b with 75 % occupancy and same chemical composition. Antiphase planar defects were discovered in the pristine NbO and related to the structural transformation. Theoretical calculations performed by density functional theory (DFT) supported the experimental conclusions.

Effect of Pore Formation on Redox-Driven Phase Transformation.

When solid-state redox-driven phase transformations are associated with mass loss, vacancies are produced that develop into pores. These pores can influence the kinetics of certain redox and phase transformation steps. We investigated the structural and chemical mechanisms in and at pores in a combined experimental-theoretical study, using the reduction of iron oxide by hydrogen as a model system. The redox product (water) accumulates inside the pores and shifts the local equilibrium at the already reduced material back toward reoxidation into cubic Fe_{1-x}O (where x refers to Fe deficiency, space group Fm3[over ¯]m). This effect helps us to understand the sluggish reduction of cubic Fe_{1-x}O by hydrogen, a key process for future sustainable steelmaking.

First‐Principles Estimation of Low‐Pressure Superconductivity in KC2H8 Ternary Hydride

Very recently, much research progress has been made on the pressure‐induced superconducting state in ternary hydrides. Herein, an ab initio study of the KC2H8 ternary system is presented at a pressure in the range of 0–100 GPa. Its structural, electronic, dynamical, and superconducting properties are investigated, demonstrating that, at low pressure, KC2H8 is dynamically stable in a clathrate structure with space group Fmm and exhibits superconducting behavior with critical temperatures Tc in the range of 4–94 K. The important role played by C‐ and K‐derived phonon modes at low frequencies and H‐derived phonon modes at high frequencies is highlighted. Moreover, through the analysis of the hydrogen isotope effect, the conventional phonon‐mediated pairing mechanism in this system is proved.

Nanoceria and hybrid silver–ceria nanoparticles fabricated by liquid-mediated laser ablation as antimicrobial agents

In this study, cerium oxide and hybrid silver–ceria nanoparticles (NPs) have been fabricated, characterized and tested for antimicrobial efficacy for applications in the fields of biotechnology and environmental object disinfection/protection. For the preparation of CeO2 and the hybrid silver–ceria NPs, two approaches based on an eco-friendly laser ablation in solution method have been developed. Ceria NPs were synthesized by pulsed laser ablation of a ceria pressed tablet in distilled water. The size distribution of the formed NPs was bimodal, with average diameters of 2.5 and 7.6 nm. The cubic crystalline structure of the NPs (space group Fm-3 m) was confirmed by X-ray diffraction data, as well as Raman and optical absorption spectroscopy. The sequential laser ablation of silver and ceria targets in water allows for the preparation of hybrid CeO2–Ag NPs having a core–shell, decorated and Janus-like structure. Laser ablation of Ag in a CeO2 colloidal solution offers new opportunities to tune the structure and morphology, and to enhance the antimicrobial properties of the resulting NPs. The interaction of ceria and silver in a composite resulted in an improved antimicrobial activity, as tested towards Escherichia coli, Staphylococcus aureus bacteria and Candida albicans fungi, demonstrating the great potential of the hybrid silver–ceria NPs in biocatalytic and antimicrobial applications.

Green synthesis of magnesium oxide nanoparticles by chitosan polymer and assessment of their photocatalytic activity and cytotoxicity influences

The present study for the first time describes a synthesizing route for Magnesium Oxide nanoparticles (MgO-NPs) through a green chemistry method by the exertion of chitosan polymer as the stabilizer and reducing agent. The prepared MgO-NPs were described by the outcomes of TGA/DTA, FTIR, UV–Vis, XRD, and FESEM/EDX/PSA methods. FTIR spectra confirmed the presence of some essential functional groups throughout the synthesized MgO-NPs. Additionally, as the seen peak at 358 nm in the UV–Vis corroborated the formation of NPs, their pure cubic crystallinity framework with an Fm-3m space group was exhibited by the XRD pattern as well. The FESEM images were indicative of achieving a spherical morphology, while the EDX analysis approved the presence of Mg and O elements throughout our product. Also, for the first time, the cytotoxic effects of MgO-NPs were measured on Huh-7 cancer cell lines, and the IC50 value was reported as 54 μg/mL. Also, the photocatalytic activity of these NPs in the degradation process of methylene blue (MB) pigment was studied and the results showed the high ability of these NPs in pigment degradation.