Mohammed Sultan Al-Buriahi

Apatite-wollastonite (AW) is an important biomaterial useful in clinical practice for tissue engineering and other applications. In this research paper, AW and B2O3-doped AW glass ceramics (GCs) were reported and investigated deeply by means of their ability to attenuate gamma-photons. The studied samples denoted by AW, AW-10B, and AW-20B as the B2O3 content from 0 to 20 mol% with the step of 10. Using FLUKA and other theoretical approaches, photon interaction parameters for narrow and broad beam transmission through the AW GCs were estimated for the 15 keV–15 MeV energy range. Also, the density of the GCs increased as the B2O3 content increased. The mass attenuation coefficients were found to be within the ranges 0.0231–13.5659 cm2/g, 0.0225–12.3561 cm2/g, and 0.0220–11.1079 cm2/g for AW, AW-10B, and AW-20B, respectively. The effective atomic number of the GCs fell within the …

In the present study, the ceramic powder Ba 2 NaNb 5 O 15 (BNN) was synthesized using the solid route reaction method. The BNN ceramic powder underwent characterization using various techniques, including scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The focus of the study then shifted to investigating the potential of BNN as a catalyst for degrading a cationic dye called Methylene Blue (MB) by photocatalysis, piezocatalysis, and piezo-photocatalysis processes. The results of the study indicated that the synergistic performance of photocatalysis and piezocatalysis processes exhibited a more effective performance compared to each process operating individually. This suggests that the simultaneous use of both processes enhances the degradation efficiency of the dye, showing promising results for potential applications in …

The recent industrial revolution and population growth have escalated the threat to the environment. Industries themselves discharge millions of tons of different harmful solvents, chemicals, and organic/metal ions into the water system each year. For the degradation of these organic wastes, photocatalysis has been extensively studied. The most researched classes of nanoparticles used as photocatalysts in environmental remediation are metal oxide and metal ferrite nanostructures. In this context, we have fabricated magnesium ferrite (MgFe2O4) nanoparticles and molybdenum trioxide (MoO3) nanorods by coprecipitation and hydrothermal processes, respectively. Moreover, their binary composite (MgFe2O4/ MoO3) was fabricated to improve the absorption of light in the visible region. Further, its ternary composite was fabricated with CNTs (MgFe2O4/MoO3 @CNT) to enhance photocatalytic activity by reducing …

The borotellurite glasses whose chemical structure is (29.5–0.4x)CaO + 10CaF2 + (60–0.6x)B2O3 + xTeO2+ 0.5Yb2O3 (where x=10, 16, 22, 31, and 54 % mole. represent TCCBY1-TCCBY5, respectively) are Pb-free, thermally stable, and transparent glasses with attractive optical features for technological applications. The gamma-photons, electrons, protons, neutrons, carbon ions, fast neutrons, and fast neutron interaction parameters of these glasses are presented in this study to better understand the role of TeO2 in influencing their radiation shielding properties and radiation protection applications. The photon mass attenuation coefficient was evaluated by XCOM computation and simulation using the FLUKA code. The FLUKA code was also used to evaluate the mass stopping powers of the charged radiations, while neutrons’ cross sections were evaluated using standard expressions. For 0.015 MeV–15 MeV …

Some of the important applications in the field of spintronics are spin current driven logic devices having logic gates and in read heads in the hard disk drives, magnetic random access memory (MRAM) containing non-volatile memory units and extremely complex magnetic sensor. In spintronic applications, a magnetic tunnel junction (MTJ) is considered the back bone of all such devices. With this motivation, in present study we have predicted very low resistance area (RA) product value and high tunnel magneto resistance (TMR) of two designed MTJs by using full Heusler alloys (FHA) Co2TiZ (Z = Ge, Si) as electrode and MgO as barrier layer. These used half metallic (HM) Heusler alloys (HA), have been investigated using Wien2K code, via primary standard calculations and studied electronic and magnetic properties followed by structural and magnetic phase stability. Spin based band structure along with density …

In this paper, the gamma radiation shielding properties of S-TV/TiX glasses are investigated at different photon energies using data from FLUKA simulations and the XCOM library. Three samples of TV screen glass (S-TV) doped with TiO2 were prepared using cold isostatic pressing. The samples were designated as S-TV, S-TV/Ti10, and S-TV/Ti20 for TiO2 concentrations of 0 wt.%, 10 wt.%, and 20 wt.%, respectively. The gamma radiation transmission data for the samples obtained from FLUKA simulations and the XCOM database were used to compute the mass attenuation coefficient (µ/ρ) of the S-TV/TiX samples. Other photon interaction parameters, including the half-value layer (), mean free path (), effective atomic number ), electron density (), specific gamma constants (), dose rate (), equivalent atomic number (), exposure (), and energy absorption () buildup factors were …

The present numerical work presents a comparative study of the effective elastic, piezoelectric, and thermal properties of polyvinylidene fluoride (PVDF) matrix and (BZT-BCT) reinforcement-based piezo-composite at different volume fractions. The effective properties are significantly influenced by the connectivity of the reinforcement phase within the matrix. In the present work, two types of connectivity have been considered, viz. triply periodic minimal surface (TPMS) interpenetrating phase composite and 0–3 connectivity. Five different volume fractions viz. 10%, 15%, 20%, 25% and 30% were considered. Effective properties were calculated at different volume fractions and for TPMS and 0–3 composite. Significant enhancement in effective properties was observed in TPMS piezo-composites compared to 0–3 piezo-composites. The present work attempts to highlight the importance …

Harnessing the power of sunlight for environmental remediation demands efficient photocatalysts. Here, we introduce a novel WO3/gCN/rGO ternary composite designed to excel in visible-light photocatalysis. The synergistic interplay between WO3's strong oxidizing power, gCN's exceptional conductivity and charge separation, and rGO's enhanced light absorption promises significant activity improvement. The structural, optical test and photocatalytic properties of the as-synthesised materials was conducted using X-ray Diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and UV–visible spectroscopy. WO3, WO3/gCN, and WO3/gCN/rGO were treated against benzoic acid (BA), crystal violet (CV) as a dye and ciprofloxacin (CF) as a drug. The band gap energies of WO3 and WO3/gCN have been estimated to be 2.7 eV and 2.05 eV, accordingly. The rate constants (K) for the catalysts, namely WO3 …

In the present study, with the aid of the ultrasonication route the copper-doped cobalt chromium ferrite with graphitic carbon nitride (CoCrCuFe2O4@gCN, CCrCuFO@gCN) was prepared whereas the cobalt-chromium ferrite (CoCrFe2O4, CCrFO) and copper doped cobalt chromium ferrite (CoCrCuFe2O4, CCrCuFO) were synthesized via sol-gel approach. The gCN has a vast surface area, better stability, and a higher capability for the transfer of electrons during photocatalysis. Prepared products were characterized by several standard techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV–Vis spectroscopy measurements (UV–Vis). The crystallite size of CCrFO and CCrCuFO were 16.3 nm and 15.8 nm respectively calculated by Debye Scherer formula. Under sunlight, Crystal violet, Congo red, Methyl orange, Methyl blue, and Benzoic acid were degraded. Under the …

High-performance, thin, and lightweight EMI (Electromagnetic interference) materials with outstanding shielding effectiveness were explored over the last years to solve the problems in electronic devices. Magnetic absorbing materials have extensive bandwidth, good impedance matching, and excellent absorption features. In the present study, Sm-Mn Sr-doped M hexaferrites with Sr1-xSmxFe12-yMnyO19 whereas (x= 0.00, 0.025, 0.05, 0.075, y = 0.00, 0.25, 0.5, 0.75) were prepared by the chemical route. XRD, FESEM, HRTEM, FTIR, VSM, and VNA are used to evaluate the properties of the Sm-Mn doped Sr-based M-type hexagonal ferrite. The XRD (X-ray diffraction) results revealed the presence of a hexagonal phase in the prepared samples. Rietveld refinement also confirmed the phase purity for the Sm-Mn doped Sr-based M-type hexagonal ferrites. The FESEM (Field emission scanning electron microscopy …

EM absorbers with outstanding absorption, shielding capability, and dissipation performance are still challenging in hostile environments. To address the EMI issues, the meta-absorbers of the spinel-based structure were designed and prepared. Herein, Zr-In co-substituted Ni-Zn nano ferrites with the composition of Ni 0.7 Zn 0.3 (ZrIn) x Fe 2–2x O 4 for 0≤ x≤ 0.20 with 0.05 step size were prepared using the citrate-gel self-ignition route. The characteristic features of the Zr-In doped NiZn nano ferrites were evaluated from FESEM, XRD, FTIR, and VSM, respectively. The bond lengths and unshared-shared edges in Zr-In doped NiZn ferrite were estimated using the Bertaut method. FTIR analysis confirms the occurrence of phase in Zr-In co-substituted Ni-Zn ferrite. The micrographs of Zr-In doped NiZn ferrite show circular and hexagonal mixed-shaped particles. SFD and high-frequency response from the Zr-In doped …

This study investigates the radiation attenuation properties of tellurite-based glasses with the chemical formula 75TeO2-(24-x)Li2O-(x)MoO3–1V2O5 (TLMV), where x = 0, 12, 24 mol%. The research focuses on important radiation protection values, such as the linear attenuation coefficient (μ), mass attenuation coefficient (μ/ρ), effective atomic number (Zeff), effective electron density (Neff), mass energy-absorption coefficient (MEAC), specific gamma-ray constants (Γ), gamma dose rate (Dr), mean free path (λ), half value layer (d1/2), and removal of fast neutrons (∑R). The gathered results indicate that changing Li2O and MoO3 mol% concentrations significantly impact shielding effectiveness. Additionally, this study compares the radiation shielding of TLMV glasses with commercial glasses, providing a comprehensive analysis for applications in healthcare, industrial, and related fields and exploring the potential …

This research investigates the photon interaction quantities of xLi2O+ (80-x) B2O3+ ZnO with the aim of ascertaining their shielding efficacy and tissue equivalence. The chemical descriptions of the glasses in terms of molar concentrations of oxides (and their codes) adopted for this study are: 10Li 2 O+ 70B 2 O 3+ 20ZnO (ZnLiB1), 20Li 2 O+ 60B 2 O 3+ 20ZnO (ZnLiB2), 30Li 2 O+ 50B 2 O 3+ 20ZnO (ZnLiB3), and 40Li 2 O+ 40B 2 O 3+ 20ZnO (ZnLiB4). The mass attenuation coefficients of the investigated borate glasses were computed with the aid of the well-known and reliable WinXCom software. In addition, the mass energy absorption coefficient (μ e n ρ) using the NIST-XCOM database. Other photon interaction parameters such as the gamma dose constant, electron density, effective atomic number, dose rate, and buildup factors. The obtained mass attenuation coefficient (in unit of cm 2/g) ranged between 0 …

This study focuses on the investigation of the gamma attenuation properties of a 15Na 2 O–50SiO 2–10Al 2 O 3-(25-x) CaO-xZnO-1CeO 2-1Yb 2 O 3 (x= 0, 5, and 10 mol%) glassy system using Geant4 Monte Carlo and theoretical approaches. Geant4, a Monte Carlo simulation package, is employed to accurately model the interaction of photons with the glassy system involved. Additionally, theoretical calculations are utilized to obtain the attenuation parameters based on the elemental composition and density of the glass system by the helping of computer software. Such evaluated key attenuation parameters includes attenuation coefficients, energy deposition profiles, and transmission factors for different radiation sources and energies. Various configurations of the glass system, incorporating different compositions and thicknesses, are analyzed to optimize the shielding effectiveness. The results revealed that the …

Carbon-based materials have a broad range of applications. Among various carbon-based materials, reduced graphene oxide (rGO) is one of the facile options for supercapacitor (SCs) fabrication. The main reason is that it offers excellent conductance and enhanced surface redox reactivity. Therefore, there is a significant possibility that this material will boost the electrochemical efficiency of pseudocapacitive materials based on transition metals. Using the sonication route, we have synthesized NiO/CoFe2O4 composite and decorated it with rGO. After structural and morphological analysis, the prepared electrode materials were subjected to electrochemical energy storage efficiency studies. The obtained data showed that the NiO/CoFe2O4@rGO exhibited a higher specific capacitance of 911.25 Fg-1 as compared to other electrode materials (such as NiO/CoFe2O4, NiO, and CoFe2O4). Moreover, it was observed …

Due to the economic and environmental cost of producing cement for concrete, research into the use of alternative materials such as geopolymers for the partial replacement of cement has become popular. In an attempt to understand the effect of such replacement on the shielding behavior of concrete, this study evaluated and analyzed the gamma-ray interaction parameters of fly ash-and rice husk ash-based geopolymers (G-RHA-F1, G-RHA-F2, G-RHA-F3, and G-RHA-F4). The mass attenuation coefficient (μ ρ), mass energy absorption coefficient (μ e n ρ), effective atomic number (Z e f f), specific gamma-ray dose constant (Г), dose rate (D r), and photon buildup factors (BFs) were computed for photon energies within 15,000 eV and 15,000 keV. The evaluated parameters showed differences in value for the materials. For G-RHA-F1, G-RHA-F2, G-RHA-F3, and G-RHA-F4, μ ρ values are within the range 0.0208–6 …

In this study, the precipitation and sonication methods were used to fabricate WO3–NiO/rGO nanohybrid. The structural, spectral and optical characteristics of the as-synthesized samples were confirmed using X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), and UV–Visible spectroscopy. In comparison to pure WO3, NiO and WO3–NiO, WO3–NiO/rGO nanohybrid demonstrated increased photocatalytic degradation activity for rhodamine B and methylene blue under solar light irradiation. The percent degradation values for WO3, NiO, WO3–NiO and WO3–NiO/rGO nanohybrid for methylene blue were 64%, 81%, 86% and 95%, and for rhodamine B were 58%, 80%, 92% and 96%. The lower recombination of photo-generated holes and electrons as a result of the creation of a heterojunction between WO3 and NiO and the improved optical bandgap energy of WO3-NiO nanocomposite and its …

This study presents novel materials for improving wastewater treatment by producing a holmium-doped lanthanum cobaltite (Ho-LaCoO3) nanomaterial, and its composites with graphitic carbon nitride (g-C3N4). Powder X-ray diffraction (P-XRD) analysis of the synthesized samples verified their high crystallinity. FTIR spectroscopy analyses the existence of significant functional groups like La–O and Co–O. These results show that incorporating Ho and two-dimensional materials into the LaCoO3 matrix successfully increased the surface area and catalytic activity. The morphological analysis indicates the Ho-doped LaCoO3 nanoparticles embedded on the surface of Ho-LaCoO3/g-C3N4. Mott-Schottky analysis was employed to investigate the electrochemical properties of LC and HLC. Optical analysis revealed that adding g-C3N4 sheets to Ho-Doped LaCoO3 significantly reduced the optical bandgap energy. The …

The current study is based on the synthesis of lanthanum ferrite (LF), silver-doped lanthanum ferrite (AgLF), and its composite with CNTs (AgLF@CNT) for degradation of organic effluents under visible light. The physiochemical characteristics of synthesized nanomaterials were examined by X-ray diffraction technique (XRD), Fourier transforms infrared spectroscopy (FTIR) and UV–Visible spectroscopy. XRD results revealed that the synthesized product has a crystalline structure. Tauc plot method was used to analyze the bandgap energy of the prepared nanocatalysts. Bare and doped lanthanum ferrite showed bandgap energy of 2.72 eV and 1.81 eV, respectively. The % degradation shown by LF, AgLF and AgLF@CNT for the degradation of methylene orange was 37.93%, 53.98%, and 78.26%, respectively. AgLF@CNT showed 74.42% degradation of crystal violet at the rate of 0.007 min−1. AgLF@CNT has an …

In this paper, we investigate the radiation shielding and dosimetry parameters of the silica–borate glasses containing Sm 2 O 3. We examine the effect of Sm 2 O 3 on the density, attenuation factors (such as the mass attenuation coefficients, MAC and linear attenuation coefficient, LAC), and radiation shielding performance of the glass system involved, as well as its ability to absorb and scatter radiation. The mass attenuation coefficients of the glasses were computed using XCOM for 15 keV-15 MeV photons. Other relevant parameters that described the photon absorbing and scattering competence of the glasses were theoretically computed and assessed. In the low energy regions, a distinct variation between the MAC (µ/ρ) and energy is observed, with a value of 14.479 cm 2/g at 15 keV representing the difference in MAC between the glasses with the lowest and highest Sm 2 O 3 content. In contrast, at high …