2O3 Nanocomposite Research Articles

Physical properties of ultrasonic assisted MWCNT/Ni0.5Co0.5Pr0.2Fe1.8O4 nanocomposites for future energy storage applications

The demand for materials with superior magnetic and dielectric properties is critical for the advancement of high-performance electronic and magnetic devices. In response to this need, Ni0.5Co0.5Pr0.2Fe1.8O4 (NiCoPrFeO) nanoparticles were synthesized using the sol–gel auto-combustion technique, known for its simplicity and versatility. To enhance the functional properties of these nanoparticles, multiwalled carbon nanotubes (MWCNTs) were incorporated, recognized for their high electrical conductivity and low density, to create a novel nanocomposite. The structural and physical properties of the prepared NiCoPrFeO/MWCNTs nanocomposites were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and Impedance Analysis. XRD confirmed the successful formation of the nanocomposite NiCoPrFeO/MWCNTs. TEM provided detailed insights into particle size to be around 18.553 and the interactions between the nanoparticles and MWCNTs. FTIR spectra indicated the presence of absorption bands ‘ν1′ and ‘ν2′ to be around 545 and 415 cm−1 which is characteristic of the cubic spinel structure. The addition of MWCNTs significantly improved the magnetic properties of the nanocomposite, with higher MWCNT concentrations leading to stronger magnetization, as shown by VSM analysis the values of Mr, Ms and Hc were found between 1.41 to 4.79 emu/g, 16.67 to 24.35 emu/g and 204.29 to 569.77 Oe, respectively. The dielectric properties, including dielectric constant, dielectric loss, loss tangent, and AC conductivity, exhibited notable improvements with increasing MWCNT content across varying frequencies. These results suggest that NiCoPrFeO/MWCNTs nanocomposites could be a promising solution for improving materials used in electronic and magnetic devices, leading to more efficient and advanced technologies.

Synthesis and structural characteristics of AgxSn1–xO2 nanocomposites and their sensing performance toward methane, hydrogen, and carbon monoxide

The physical features and potential applications of metal oxide semiconductor nanomaterials can be influenced by doping, heat treatment, and applied synthesis techniques. Herein, a simple hydrothermal method was used to synthesize AgxSn1–xO2 nanocomposites (x=0, 0.05, 0.2, 0.4, 0.5, and 1). The crystal structure, surface morphology, chemical bonding, surface area, and oxidation states are investigated. FTIR, XRD, HR-TEM, SEM, and XPS techniques were used to characterize the AgxSn1–xO2 nanocomposites, while the electrical resistivity measurement was conducted to assess their gas-sensing characteristics. The findings demonstrate that Ag atoms are evenly distributed inside the tetragonal SnO2 lattice up to x=0.4, meanwhile, a further increase in x leads to the growth of a cubic Ag2O phase alongside the SnO2 phase. The crystallite size of the SnO2 phase was increased as the Ag concentration increased, whereas reduced for the Ag2O phase. The pure SnO2 phase exhibits spherical nanoparticles, whereas the AgxSn1–xO2 nanocomposites (x > 0) have a morphology of nanosheets and nanoplates. The average BET surface area was improved to 358 m2/g by increasing the Ag content up to x=0.2. The XPS confirms the presence of various oxides such as Sn 3d, O 1 s, and Ag 3d. The AgxSn1–xO2 nanocomposites were employed as electrical sensors to detect CH4, H2, and CO gases at an operating temperature range of 200–400 °C. The Ag0.2Sn0.8O2 nanocomposites show the best response/recovery time towards CH4 at 200 °C. The AgxSn1–xO2 composite exhibits a good response towards CH4 compared to H2, and CO gases.

The electrical transport property and gas detection behaviour of polyvinyl alcohol and γ-Fe2O3 nanocomposite film

This paper presents the electrical and gas detection behaviour of polyvinyl alcohol (PVA)/γ-Fe2O3 nanocomposite films. The physical characterization includes X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), and UV–Visible spectroscopy. The analysis of both the dc resistivity and ac conductivity using Correlated Barrier Hoping (CBH) conduction process shows that the conductivity enhances with the decreasing of activation energy in case of the PVA/γ-Fe2O3 nanocomposite film which is the indication of interfacial defect states. The current voltage study at various temperatures follows the thermoionic emission model of Schottky Barrier diode. Moreover, the dielectric constant enhances for PVA/γ-Fe2O3 nanocomposite film, which indicates homogeneous distribution of γ-Fe2O3 nanoparticles within PVA matrix and the aggregation of trapped charges found in interface develops an interfacial polarization. As a result, the gas adsorption capacity of the nanocomposite film increases which improves the signal-to-noise ratio, leading to higher gas detection sensitivity.

Synthesis, characterization, and applications of ambi-functional PANI/GO/MOF-Fe3O4 magnetic nanocomposite for removing industrial dye and emerging contaminant

Discharging industrial dyes and emerging contaminants (ECs) into water resources has become a serious environmental concern. A novel PANI/GO/MOF-Fe3O4 nanocomposite has been synthesized to remove Methyl Orange (MO) and Naproxen Sodium (NAP) from the wastewater. FTIR, XRD, SEM,TGA, BET, and XPS techniques have been exposed to identify nanocomposites’ morphology, composition, and thermal stability. Langmuir and Freundlich’s models revealed that the Langmuir model better describes adsorption (R2 = 0.999 for MO and 0.998 for NAP). Moreover, the findings of kinetic studies established a pseudo-second-order model with good agreement with the experimental results (R2 = 0.995 for MO and NAP), indicating the dominance of chemisorption. The pseudo-first-order reaction model provided reasonable fits (R2 = 0.892 for MO and 0.872 for NAP). Thermodynamic analysis indicated exothermic (ΔHo = -17.72 kJ mol−1 for MO and −28.28 kJ mol−1 for NAP) and spontaneous (ΔGo = -3.877 kJ mol−1 for MO and −5.416 kJ mol−1) nature of dye and ECs. The PANI/GO/MOF-Fe3O4 nanocomposite exhibited significant adsorption for MO (239.78 mg g−1) and NAP (40.64 mg g−1), respectively. Furthermore, the ease of recovery (up to 4 cycles) of the nanocomposite enhances its sustainability, offering a viable approach to industrial dye and emerging using ambi-functional nanocomposite.

Electron Spin Resonance Study of Magnetite Nanoparticles in iPP Matrix

Electron Spin Resonance Study of Magnetite Nanoparticles in iPP Matrix

Enhanced photocatalytic activity of α-Fe2O3/MgO nanocomposites for environmental sustainability

The goal of this study is to identify the optical, magnetic, and structural properties of α-Fe2O3/MgO & MgO/α-Fe2O3 nanocomposites and use them to purify water contaminated by harmful dyes. The economical hydrothermal approach was utilized to create nanocomposites, resulting in weight ratios of α-Fe2O3: MgO (1:1, 2:1 and 1:2). The synthesized materials containing α-Fe2O3 and MgO phases were identified by XRD pattern. XPS spectra were used to identify lattice defects and oxygen vacancies. The magnetic investigations show that pure α-Fe2O3 has a greater magnetic character than other synthesized materials, with a maximum magnetization of 0.14 × 10−2 emu/gm. In just 90 min, α-Fe2O3/MgO nanocomposites degrade Rose Bengal dye by 90.01 %, demonstrating their superior photocatalytic activity. The combined action of α-Fe2O3 and MgO, which prevents the formation of highly active radical species (OH• and O2• radicals) and photo-generated charge carrier recombination, is responsible for the increased photocatalytic activity. Furthermore, the magnetic nature of these nanocomposites enables them for the reusability process.

ErFeO3/α-Fe2O3 nanocomposites derived from MIL-100(Fe) for acetone sensing

Acetone, a flammable and volatile liquid, is toxic and can affect human well-being. Additionally, its presence in exhaled air can indicate the state of human respiratory health. Therefore, the investigation of an acetone gas sensor holds significant urgency in the realm of scientific research. Metal-organic frameworks (MOFs) exhibit significant promise in the field of gas detection due to their extensive surface areas, remarkable porosity, and the inclusion of unsaturated metallic sites. The study conducted the preparation of ErFeO3/α-Fe2O3 nanocomposites through impregnation and oxidation roasting methods. EF21 (MEr(NO3)3∙6H2O:MMIL-100(Fe) = 2:1) exhibited a large surface area of 43.7 m2/g and a high abundant oxygen vacancy of 12.5 %. Gas sensing experiments revealed that the EF21-based gas sensor exhibited a strong response of 55 towards 100 ppm acetone, with a low detection limit of 2 ppm (S = 3.3). Notably, the sensor demonstrated excellent selectivity towards acetone over other volatile organic compounds (e.g., ethanol, methanol, ammonia, ether, and toluene) in gas selectivity tests. Moreover, the EF21-based gas sensor maintained its responsiveness to acetone even under high relative humidity conditions (RH:90 %, S = 27) and demonstrated stability over a 15-day long-term test. The study provided a comprehensive explanation of the gas sensing mechanism responsible for the enhanced performance observed in ErFeO3/α-Fe2O3 through detailed analyses.

Chitosan-assisted self-assembly of flower-shaped ε-Fe2O3 nanoparticles on screen-printed carbon electrode for Impedimetric detection of Cd2+, Pb2+, and Hg2+ heavy metal ions in various water samples

This study focuses on the fabrication of a novel sensing platform on a screen-printed carbon electrode, modified by a combination of hydrothermally synthesized iron dioxide (ε-Fe2O3) nanoparticles and Chitosan (CS) biopolymer. This unique organic-inorganic hybrid material was developed for Electrochemical Impedance Spectroscopy (EIS) sensing, specifically targeting heavy metal ions that include Hg2+, Cd2+, as well as Pb2+. The investigation encompassed a comprehensive analysis of various aspects of the prepared Fe2O3 and CS/ε-Fe2O3 nanocomposites, including phase identification, determination of crystallite size, assessment of surface morphology, etc. CS/ε-Fe2O3 was drop-casted and deposited on the Screen-Printed Electrode (SPE). The resulting sensor exhibited excellent performance in the precise and selective quantification of Hg2+, Cd2+, and Pb2+ ions, with minimal interference from other substances. The fabricated sensor exhibits excellent performance as the detection range for Hg2+, Cd2+, and Pb2+ ions linearity is 2–20 μM, sensitivity, and LOD are 243 Ω/ μM cm2 and 0.191 μM, 191 Ω/μM cm2, and 0.167 μM, 879 Ω/ μM cm2, and 0.177 μM respectively. The stability of the CS/ε-Fe2O3/SPE electrode is demonstrated by checking its conductivity for up to 60 days for Hg2+, Cd2+, and Pb2+ ions. The reusability of the fabricated electrode is 14 scans, 13 scans, and 12 scans for Hg2+, Cd2+, and Pb2+ ions respectively. The findings indicate the successful development of an innovative CS/ε-Fe2O3 electrode for the EIS sensing platform. This platform demonstrates notable potential for addressing the critical need for efficient and sensitive EIS sensors capable of detecting a range of hazardous heavy metal ions, including Hg2+, Cd2+, and Pb2+.

Optimization of Magnetic Dielectric Nanocomposites Obtained by Facile and Low-Cost Fabrication for Effective Absorption of Electromagnetic Waves

This work presents the synthesis of Fe3 O4 nanoparticles (FNPs) and nanocomposites (NCs) of FNPs and functionalized carbon nanotubes (CNTs) at varying weight ratios for application in 8–18 GHz electromagnetic waves (EMW) absorbers. Their dielectric, magnetic, and structural characteristics were also examined. To create the desired NCs, CNTs are first mixed with FNPs at various weight ratios. The magnetic properties of the samples were ascertained using a vibrating sample magnetometer, and the dielectric properties of all the samples were examined by a vector network analyzer at room temperature after the crystal structure of the samples was determined by X-ray diffraction, surface morphology, and elemental analysis by scanning electron microscopy, energy dispersive spectroscopy, and Fourier transform infrared spectroscopy. Fe3 O4 @CNTs NCs in six different weight ratios (NC1 -NC6 ) were prepared. Sample NC3 , with a thickness of 2.25 mm, exhibited the greatest loss in the X band, measuring -27.07 dB, out of all the samples. Additionally, the NC4 sample which has a thickness of 5.00 mm, had the best loss, which came in at -38.21 dB in the Ku band. A data-driven method developed for multi-parameter optimization was then used to find out the optimal ratio weight ratio and sample thickness based on the experimental data. Samples with minimum reflection loss -34.1 dB (-41.5 dB), and others with effective bandwidth coving 69.0 % (71.4 %) in the X band (Ku band) were obtained.

Introduction of Pr2CrMnO6/CrMn1.5O4 nanocomposites as a visible-light photocatalyst: Green sol-gel auto-combustion synthesis, structural characterization and comparative study

With the expansion of industrial activities and the global warming problem, the recent technological advances on the application of an efficient photocatalyst for environmental pollution removal are especially desired. However, visible light-induced degradation of organic pollutants in water resources is of great importance. Herein, we report the development of a novel double perovskite Pr2CrMnO6-based oxides (PCMO) for photocatalytic abatement of manufactured coloring agent like methyl orange (MO) under visible light. An environmentally friendly auto-combustion route was employed to prepare PCMO nanoparticles, in which the various amounts of mango juice act as fuel sources. As a result, a morphologically desirable sample was achieved in the presence of 15 mL mango juice with composition of Pr2CrMnO6/CrMn1.5O4. From DRS data, the optical band gap of the PCMO nanostructures was calculated as 2.0 eV. Using VSM analysis, this compound exhibited a dual magnetic behavior, ferromagnetic nature in low field and paramagnetic nature in up field. The photocatalytic results indicated that PCMO nanostructures are most effective in photocatalytic activity when the dye concentration is 15 ppm and the catalyst dosage is 0.05g. Following 120 min of light irradiation at this condition, it was found that the maximum yield is 95.1%. As part of the investigation into the mechanism of photocatalysis, benzoic acid, EDTA, and benzoquinone were used as •OH, h+, and •O2− scavengers, respectively. In the recyclability test, the photocatalytic efficiency decreased from 95.1% to 88.0% after five consecutive cycles.

Unveiling the importance of the interface in nanocomposite cathodes for proton-conducting solid oxide fuel cells.

Designing a high-performance cathode is essential for the development of proton-conducting solid oxide fuel cells (H-SOFCs), and nanocomposite cathodes have proven to be an effective means of achieving this. However, the mechanism behind the nanocomposite cathodes' remarkable performance remains unknown. Doping the Co element into BaZrO3 can result in the development of BaCoO3 and BaZr0.7Co0.3O3 nanocomposites when the doping concentration exceeds 30%, according to the present study. The construction of the BaCoO3/BaZr0.7Co0.3O3 interface is essential for the enhancement of the cathode catalytic activity, as demonstrated by thin-film studies using pulsed laser deposition to simulate the interface of the BCO and BZCO individual particles and first-principles calculations to predict the oxygen reduction reaction steps. Eventually, the H-SOFC with a BaZr0.4Co0.6O3 cathode produces a record-breaking power density of 2253mW cm-2 at 700°C.

Hydroxyl Radical Scavenging of Liquid Silicone Rubber/Ce0.5Zr0.5O2 Nanocomposites for Local Delivery of Antioxidants to Control Oxidative Stress Induced Damages

Hydroxyl Radical Scavenging of Liquid Silicone Rubber/Ce0.5Zr0.5O2 Nanocomposites for Local Delivery of Antioxidants to Control Oxidative Stress Induced Damages

The effective adsorption of Ni(II) and nitrate from aquatic systems by superparamagnetic MoS2/γ-Fe2O3 nanocomposites: Optimization through RSM-CCD design

In this study, we examined the adsorption capacity (Qe) of superparamagnetic MoS2/γ-Fe2O3 nanocomposite with varying percentages of loaded γ-Fe2O3 nanoparticles (10 %, 20 %, and 30 %) for rapid and effective removal of Ni+2 and NO3- ions from water using response surface methodology combined with the central composite design (RSM-CCD). In essence, the adsorption properties of MoS2 3D ball-flower-like are increased by loaded γ-Fe2O3 nanoparticles by forming nanocomposite. Magnetic nanocomposites were checked under optimum conditions to remove Ni+2 and NO3- ions several times, which showed the material’s ability for regeneration and reuse as adsorptions. In experimental design, in the first step, we attempt to present models for the adsorption capacity (Qe) and removal percent and detect the influence of the parameters of the process using response surface methodology (RSM) by historical data. In the next step, with regard to the detection of impressive variables using obtained results in the previous step, the central composite design (CCD), by consideration of independent variables for the experimental design was done. By interpreting ANOVA and diagnostic plots, the effect of individual and binary effect of variables was discussed. The optimal conditions for maximizing adsorption capacity (Qe) and removal percent were predicted, and the validation of the predicted conditions was experimentally evaluated, which confirmed an agreeable agreement. The optimization of predicted conditions for Ni+2 and NO3- species are reported in the concentration of (0.49 mol.L−1) Ni+2 and (0.50 × 10-4 mol.L−1) NO3- with weight percent of γ-Fe2O3 = 26.72 % and 27.55 %, respectively. Predicted adsorption capacity (Qe) and removal percent of species concentration for Ni+2 and NO3- ions of optimized nanocomposite concluded 0.98, 9.59 × 10-5 (mg/g), 100, and 96 (%), respectively, which was confirmed by experimental research studies. To optimize experimental conditions, the Ni+2 and NO3- concentrations were o.5 and 0.5 × 10-4 mol.L−1, respectively. Furthermore, nanocomposites of MoS2/γ-Fe2O3 with a loaded dose of 26.72 % and 27.55 % γ-Fe2O3 for Ni+2 and NO3- were synthesized, respectively. The experimental of the adsorption capacity (Qe) and removal percent of species concentration for Ni+2 and NO3- ions concluded 0.95, 9.23 × 10-5 (mg/g), 96, and 93 (%) using MoS2/γ-Fe2O3, respectively.

Liquid phase selective oxidation of veratryl alcohol to veratraldehyde using pure and Mg-doped copper chromite catalysts.

Mg-doped copper chromite (CuCr2O4) nanocomposites were synthesised through conventional technique. The pure and doped CuCr2-xMgx O4 (x = 0.00-0.1, 0.2 and 0.3%) nanocomposites were characterized in terms of their morphology, crystal structure, surface area and catalytic performance. The chemical composition of CuCr2-xMgx O4 was confirmed via FT-IR. The formation of pure and doped catalysts was validated by XRD results. TEM/SEM confirmed the formation of CuCr2-xMgxO4 nanoparticles. Mg-doped samples possess a high specific surface area compared to pure CuCr2O4. Thus, the effects of temperature, solvent, time, oxidant and the amount of catalyst on the oxidation of veratryl alcohol were reported. Furthermore, detailed mechanisms of the catalytic oxidation of veratryl alcohol as well as the reusability and stability of the nanomaterial were investigated. The resulting composites were shown to be effective heterogeneous catalysts for the oxidation of veratryl alcohol.

Structural and magnetic investigation of novel oxide/ferrite (1-x)MgFe 2O4/(x)Mn1.95Sn0.05O3 nanocomposites

Oxide/ferrite nanocomposites are gaining great attention due to the induced exchange interactions between the different phases. Herein, the weak ferromagnetic MgFe2O4 nano-ferrites are combined with antiferromagnetic Mn1.95Sn0.05O3 nano-oxides, via co-precipitation and ball milling. The synthesized samples demonstrated the combination of ferrite and oxide phases, as confirmed by XRD analysis. This combination also generated two distinct morphologies and particle size distributions, as seen in TEM images. The SAED images depicted the polycrystalline nature of the samples. The XPS technique detected the spin-orbit doublets of the main spectral lines, revealing their different oxidation states. FTIR assisted the merged phases by the presence of multiple vibrational bands. The nanocomposites exhibited weak ferromagnetic nature, emerging from the uncompensated surface spins, as seen in M − H loops. Besides, the switching field distribution curves indicated the exchange coupling between the two phases. EPR spectra showed a decrease in g values as Mn1.95Sn0.05O3 content increased.

Pulse-electrodeposited Ni/W-Al2O3 nanocomposites at different current densities

Pulse-electrodeposited Ni/W-Al2O3 nanocomposites at different current densities

A novel route to the synthesis of CdS/α-Fe2O3 nanocomposite for enhanced photocatalytic performance

A novel route to the synthesis of CdS/α-Fe2O3 nanocomposite for enhanced photocatalytic performance

Tuning the Properties of Reduced Graphene Oxide-Sr0.7Sm0.3Fe0.4Co0.6O3 Nanocomposites as Potential Photoanodes for Dye-Sensitized Solar Cells

The generation of electricity using solar energy is an effective system to overcome the current global energy crisis. In this regard, developing new semiconductor materials can be of great interest in overcoming the challenge of charge carrier recombination and, hence, improving the power conversion efficiency (PCE) in photovoltaic devices, particularly dye-sensitized solar cells (DSSCs). Here, reduced graphene oxide-Sr0.7Sm0.3Fe0.6Co0.4O3 (RGO-SSFC) nanocomposites were synthesized using the hydrothermal method and characterized with the aid of microscopic and spectroscopic techniques, as well as a vibrating sample magnetometer, and further tested for application as photoanodes in DSSCs. Scanning electron microscopy revealed the presence of RGO nanosheets that were fully decorated by irregular- and spherical-shaped SSFC nanoparticles. Fourier-transform infrared spectroscopy confirmed the strong synergistic interaction of the RGO-SSFC nanocomposites. The large surface area of RGO-SSFC nanocomposite photoanodes facilitated effective dye loading, high photon absorption, and efficient electron transfer, resulting in better device performance. Compared to RGO-SSFC-0.1 and RGO-SSFC-1.0, the RGO-SSFC-0.5 nanocomposite showed an enhanced open-circuit voltage (Voc) of 0.84 V, short-circuit current density (Jsc) of 14.02 mA cm−2 , and a PCE of 7.25%. Eosin B and MK-2 organic dyes used as photosensitizers coated on the RGO-SSFC semiconductors resulted in low-cost DSSC photoanodes.Graphical

A novel effective immobilization of glucose oxidase on Ni0.25Zn0.25Cu0.25Co0.25La0.06Fe1.94O4 – Chitosan nanocomposite as an enzymatic glucose biosensor

An effectual enzymatic glucose biosensor has drawn significant attention in the natural world due to its continuous glucose monitoring systems on human beings. A need for accurate and dependable glucose biosensors is needed and has notably augmented the keen interest to synthesize new non-invasive glucose monitoring systems in the recent phase. A novel Ni0.25Zn0.25Cu0.25Co0.25La0.06Fe1.94O4 nanocomposite has been synthesized via the combustion method to develop an appreciable glucose biosensor. The glucose biosensor was fabricated by immobilization of glucose oxidase (GOx) onto chitosan (CH)-Ni0.25Zn0.25Cu0.25Co0.25La0.06Fe1.94O4 heterojunction nanocomposite on FTO glass substrate. The performance of the as-prepared enzymatic glucose biosensor was estimated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrochemical studies revealed an enhanced diffusion of molecules on the electrode surface, superior charge transfer rate, high sensitivity, and fast response time. The Ni0.25Zn0.25Cu0.25Co0.25La0.06Fe1.94O4-CH bi-junction conjoining with GOx exhibits a higher sensitivity of 52.76 µAmM-1cm-2 in a comprehensive undeviating range. The catalytic properties of the electrode in the H2O2 solution were studied using cyclic voltammetry, which showed a good linear response with an increase in scan rate and peak current resulting in enriched electrostatic interaction. In addition, the fabricated biosensor with a low Michaelis-Menten constant contributes a better affinity of the electrode surface towards glucose oxide.

Rietveld refinement and structural characterization of Mn0.5Zn0.5La0.09Fe1.91O4 nanocomposite

Mn0.5Zn0.5La0.09Fe1.91O4 composite has synthesized by adopting the solid-state reaction method. Chemicals like MnO2, ZnO, Fe2O3 and La2O3 were used for preparation of the powder sample of Mn0.5Zn0.5La0.09Fe1.91O4. As prepared composites were subjected to sintering for 5hrs at the temperature of 850 °C. The obtained sample was structurally characterized using XRD. The crystallite size was calculated using Debye Scherrer formula which came out to be 51.14 nm, 95.21 nm, 52.48 nm for phase A, B and C respectively. Further refinement of the XRD data was performed using Rietveld refinement method by using FullProf Suit. The refinement of XRD data for synthesized sample confirms the presence of three phases: phase A – periclase (Fe0.037Mg0.0963O) 1.7%, phase B – lanthanum (La) 0.3%, phase C – hetaerolite (Mn2O4Zn) 97.9%. The results obtained from XRD suggests that the nanoparticles in phase A are cubic in shape and the no. of space group is obtained as 225 with Laue class and point group m-3m. The Hermann-Mauguin symbol is Fm-3 m. The nanoparticles in phase B are found to be hexagonal in shape with the no. of space group is obtained as 194 with Laue class and point group 6/mmm. The Hermann-Mauguin symbol for phase B is P63/mmc. The XRD studies for phase C showed that it has tetragonal structure. From the Rietveld refinement, the no. of space group is obtained as 141 with Laue class and point group 4/mmm. The Hermann-Mauguin symbol is I 41/amd:1. In this paper the Rietveld refinement parameters like the goodness factor, Bragg R value, Rexp are also given.