Journal of Inorganic and Organometallic Polymers and Materials最新文献

Flexible ultraviolet (UV) photodetectors have attracted attention for many applications. Thermoplastic polyurethane (TPU) matrix nanocomposites have been prepared via the solution mixing method with varying wt% (0.1, 0.3, 0.5, and 1.0 wt%) of MWCNTs. Surface morphology of MWCNTs/TPU nanocomposite films with 0.1 wt% to 1.0 wt% has been studied using scanning electron microscopy (SEM), which shows the uniform dispersion of MWCNTs in TPU matrix, and coating of TPU on the surface of MWCNTs. UV photodetection performance and the mechanism of these MWCNTs/TPU nanocomposite films have also been studied. It was found that the responsivity of 1.710 A/W, and the EQE of 579.84% is found to be the maximum for the device made from the PUCNT1.0 sample. The detectivity of all the devices made from MWCNTs/TPU nanocomposite films has also been measured, which suggests that the detectivity of 8.09 × 10¹¹ Jones was observed to be maximum for the device made from the PUCNT1.0 sample. As the concentration of the MWCNT increases in the TPU matrix, the detectivity increases. These results provide us with clear guidelines to prepare the MWCNTs filled TPU nanocomposites for making free-standing, flexible, and efficient UV photo-detecting devices.

In this work, we synthesized core-shell NH₂-UiO-66@UiO-67 via a solvothermal method to achieve controlled assembly of amino-modified UiO-66 and UiO-67 at micro and nano scale. NH₂-UiO-66@UiO-67 exhibited notable visible light responsiveness and an increased specific surface area.In addition, it demonstrated outstanding performance in Cr(VI) removal, which can be attributed to the photocatalytic conversion of Cr(VI) into less toxic Cr(III), and the adjustable pores and large specific surface area facilitating Cr(III) adsorption. Notably, it exhibited a robust removal efficiency across a wide pH range of 2.0 to 10.0. Specifically, at pH = 2.0, the Cr(VI) solution with a concentration of 60 mg/L was completely removed within 140 min. The results show that the adsorption of core-shell NH₂-UiO-66@UiO-67 meets the pseudo-second-order adsorption kinetics and has the ability of photocatalytic reduction of Cr (VI).

Double perovskite is a potentially useful material for producing green energy and is thought to meet the necessary criteria for addressing energy shortages. That is why studies into these oxides have potential uses in the fields of optoelectronic technologies. In our present work, we have explored the structural, electronic, and optical properties of the double perovskites Sr₂XWO₆ (X = Co, Zn) using a first-principle study. Band structure and total density of state analysis shows that Sr₂ZnWO₆ has wider direct energy gap of 2.75 eV for both spin up and spin down configuration. While, Sr₂CoWO₆ has slightly reduced indirect energy band gap of 2.06 eV for spin up (↑) and 0.71 eV for spin down (↓) configuration. The dielectric function, absorption coefficients, reflectivity, and refractive index are used to analyze optical characteristics. The optical properties reveal that Sr₂CoWO₆ has shown much larger optical conductivity and electromagnetic radiation absorption in the UV and visible regions and a minimum value of reflectivity and energy loss function, which make it a suitable compound for optoelectronic applications. Our findings can be beneficial for further experimental research aimed at assessing Sr₂XWO₆ (X = Co, Zn) in spintronics, solar cell and optoelectronic device applications.

Lithium-sulfur batteries have attracted significant attention due to their high theoretical capacity density (1675 mA h g^− 1) and low production cost. However, under practical conditions, the low conductivity of sulfur, volume expansion, and shuttle effect of lithium polysulfide (LiPSs) still hinder the broad application of lithium-sulfur batteries. A self-assembled flexible electrode material (Nb₂O₅/PANI-cc@S) is designed and fabricated here. The core of Nb₂O₅ nanowire arrays is coated with a shell of PANI and assembled with carbon cloth (cc) as a new sulfur fluid collector. The composite exposes more active sites between sulfur and the catalytic medium to capture LiPSs. In addition, the extra free space between Nb₂O₅ nanowire arrays is conducive to the penetration of liquid electrolytes. Moreover, the shell structure of PANI on the electrode surface enhances the structural stability of the composite electrode material. It effectively inhibits the outward diffusion of polysulfide and the volume expansion during the cycle. Thanks to these synergies, the self-supporting Nb₂O₅/PANI-cc@S has a high specific capacity of 1265.7 mA h g^− 1 at 0.1 C and retains an impressive 1112.2 mA h g^− 1 capacity even after 100 cycles at 0.1 C. It shows great potential to promote the practical application of flexible lithium-sulfur batteries.

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Herein, this study primarily investigates the structural, physical, optical properties, and radiation shielding capabilities of the fabricated glass samples. The bulk (pellet) glass samples with compositions (30-x)BaO-30TiO₂-40SiO₂-xZrO₂ (0 ≤ x ≤ 6), were fabricated using a traditional melt-quenching technique. Further, XRD was performed to validate the amorphous state of the prepared glasses. Density of all the glass samples was calculated using mass-volume formula and observed to be in the range of 3.613–3.821 g/cm³. Additionally, to examine the optical behavior, UV-visible spectroscopy was performed. Indirect band gap energies were estimated from the Tauc’s plots, and found to be 4.191, 4.093, 4.042, and 3.841 eV for glasses BTSZ0, BTSZ2, BTSZ4, and BTSZ6 respectively. Moreover, refractive index and optical dielectric constant were found to be increased such as 2.134–2.201 and 4.554–4.846 with increasing content of ZrO₂. Furthermore, radiation shielding behaviour was studied using “Phy-X/PSD” software within the energy range of 0.015-15 MeV. At 0.02 MeV, BTSZ6 (24BaO-30TiO₂-40SiO₂-6ZrO₂) glass exhibited the maximum values for MAC, LAC, HVL, and TVL are 18.078 cm²/g, 69.072 cm^− 1, 0.01 cm, and 0.033 cm respectively. The BTSZ6 glass, with 6% ZrO₂, demonstrated superior gamma radiation protection and excellent optical and physical properties, making it highly suitable for optoelectronic, photonics, and radiation safety applications.

This study aimed to assess the impact of different weight percentages (0.25%, 0.5%, and 0.75%) of novel green nanoparticles on the thermal and mechanical properties of polymer-based nanocomposites. These novel nanoparticles are composed of a silica core and an external component of Mg(OH)2. The external component was synthesized in three different green synthesis techniques, using lemon juice, to achieve different geometries, i.e. dot, beam, and flake. It should be noted that nanoparticle characteristics are verified using XRD and SEM analysis. According to the experiment, adding nanoparticles to the polymer led to significant improvements in its flexural strength (43%), flexural modulus (47%), and mode I fracture toughness (32%). Additionally, the thermal characteristics have demonstrated a notable enhancement in flammability properties. Based on the UL-94 test, nanocomposite specimens were classified as V-0 and V-1, whereas neat samples are NC. Also, incorporating nanoparticles into the polymer can increase LOI by up to 31.4%. The TGA test showed that adding flake composite nanoparticles retains 33% of the specimen mass, while only 2% of neat samples remain. In general, the green composite nanoparticles led to achieving the common properties of both nanomaterials. To clarify, the silica core improved mechanical properties, while an external Mg(OH)2 component enhanced the polymer’s thermal properties.

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To address the world’s energy concerns and make the transition to a sustainable future, hydrogen, as a clean and adaptable energy carrier, has enormous promise. The drawbacks of hydrogen are thoroughly examined in this article, including production-related carbon emissions and security issues. To overcome these obstacles and realize a hydrogen-based economy that contributes to sustainable development objectives and mitigates climate change, interdisciplinary partnerships, legislative interventions, and technological developments are required. Moreover, numerous hydrogen production techniques are discussed, including standard and unconventional ways. In terms of unconventional methods, photocatalytic water splitting stands out as a cutting-edge innovation that makes use of nanomaterials as catalysts to collect solar energy and fuel the water-splitting reaction. The review focuses on the synthesis, characterization, and hydrogen production efficiency of current developments in photocatalytic materials. A thorough overview of hydrogen generation techniques is provided, mainly focusing on photocatalytic water-splitting using nanomaterials. It offers valuable insights for academics, policymakers, and stakeholders looking to promote the integration of hydrogen into a sustainable energy landscape by looking at the color coding of hydrogen production, storage systems, hydrogen utilization, and related issues.

This study presents the preparation, characterization, and application of a reduced graphene oxide-Zinc Oxide-Elwendia persica seed (rGO-ZnO-EPs) hybrid composite for supercapacitor electrode material. The rGO-ZnO-EPs composite was synthesized using a straightforward chemical route, followed by extensive characterization to elucidate its structural and electrochemical properties. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses confirmed the successful incorporation of ZnO nanospheres and EPs into the rGO matrix, forming a highly porous and well-integrated composite structure. Electrochemical performance assessments revealed that the rGO-ZnO-EPs composite exhibits a high specific capacitance of 535 F/g at a current density of 1 A/g, significantly surpassing traditional electrode materials. Notably, the composite demonstrated exceptional cyclic stability, retaining 90% of its initial capacitance after 3000 charge-discharge cycles, indicative of its robust long-term stability. Further analysis using electrochemical impedance spectroscopy (EIS) indicated low electrical resistance, which facilitates enhanced ion diffusion and surface charge transfer processes. This low resistance, combined with the high surface area and abundant active sites provided by the porous structure of ZnO nanospheres, contributes to the superior electrochemical performance of the rGO-ZnO-EPs composite. These findings emphasize the potential of the rGO-ZnO-EPs hybrid composite for advanced energy storage applications, particularly in supercapacitors, where high capacitance, excellent cyclic stability, and efficient charge transfer are critical. This study not only demonstrates the viability of incorporating natural resources such as Elwendia persica seeds into advanced materials but also paves the way for future research into eco-friendly and high-performance energy storage solutions.

In this study, uniform Zn²⁺ incorporated chitosan nanofibers were first prepared by electrospinning with PEO as the cospinning agent and ZnO as the Zn²⁺ source. Then, these composite nanofibers were carbonized at 600 ^oC under argon atmosphere to achieve ZnO embedded carbon (Zn@C) nanofibers. Afterward, these ZnO@C nanofibers were annealed at 400 ^oC under air atmosphere to prepare ZnO nanofibers. SEM, XPS and TEM results confirmed the successful preparation of ZnO nanofibers. The BET analysis shows that the surface area of ZnO nanofibers was up to 154.5 m²/g. These ZnO nanofibers exhibited excellent adsorption performance for Congo red with adsorption capacity of up to 224.2 mg/g. After adsorption, the ZnO nanofibers could be readily recovered by removal of the solution and regenerated by calcination at 400 ^oC for 1.0 h. Due to the fusion of ZnO nanofiber in the regeneration process, the adsorption capacity of ZnO nanofiber was a little reduced after regeneration. The ZnO nanofiber could be reused three times with satisfied adsorption capacity.

In this piece of investigation, TbCo₄ X ₁₂ (X = P, Sb) Terbium -filled, Skutterudites have been precisely reported through DFT ab-initio calculations in the Trans Bhala modified Becke-Johnson (TB-mBJ) potential to extract the electronic, mechanical, along with thermal, and transport properties. Structural stability was confirmed through ground state energy calculations using the Birch-Murnaghan equation of state. Electronic structure analysis, combining Perdew-Burke-Ernzerhof Generalized Gradient Approximation (PBE-GGA) and Trans Bhala modified Becke Johnson (TB-mBJ) functionals, revealed a metallic nature with PBE-GGA and a half-metallic character with TB-mBJ. Specifically, energy gaps of 0.24 eV and 0.64 eV were determined for TbCo₄P₁₂ and TbCo₄Sb₁₂, respectively. Mechanical property calculations indicated a brittle nature for both compounds. Charge density analysis confirmed ionic bonding characteristics, suggesting chemical stability. High Seebeck coefficient (S) values and associated figure of merit (zT) suggest promising thermoelectric performance across a broad temperature range.