Journal of Inorganic and Organometallic Polymers and Materials最新文献

Ce and Fe decorated on dealuminated zeolite Y (CFDDAZY) framework were prepared using isomorphous substitution method using dealumination treatment and impregnation methods to the formation of Si–O-Ce and Si–O-Fe bonds. For this purpose, we selected three distinct ratios of metals/zeolite, being 1:3, 1:10, and 1:20. An important outcome was achieved with a 1:20 ratio of metals to zeolite, providing strong evidence for the superiority of this configuration. The catalyst was characterized using XRD, FT-IR, UV–Vis, FESEM, TEM, EDX, and BET techniques. The prepared catalyst was evaluated in the degradation of 4-nitrophenol. To optimize the process, we conducted the effect of various parameters, including reaction time, catalyst amount, temperature, pH, isoelectric point, and 4-NP concentration on the photodegradation process. The optimal conditions for the removal of 4-NP were obtained in the presence of DAZY decorated with Fe and Ce under ultraviolet radiation, 40 µL of hydrogen peroxide, 0.03 g of photocatalyst, and a concentration of 5 × 10^–4 M 4-nitrophenol during 90 min. The mineralization of 4-nitrophenol (4-NP) was verified through COD experiments, resulting in a removal efficiency of 72.80%. Studying Hinshelwood’s equations revealed that the reaction rate was pseudo-first-order. The catalyst can be reused up to five times while maintaining its catalytic activity. Furthermore, the proposed degradation mechanism is introduced.

N-Doped highly ordered mesoporous carbon (N-OMC) material was synthesized by impregnation of egg-yolk biomass into the SBA-15 template, followed by carbonization at 700 °C under an atmosphere of N₂, and removal of the SBA-15 silica moiety with an alkaline aqueous solution under heating conditions. Au nanoparticles were decorated on the surface of the N-OMC material by chemical reduction of NaAuCl₃ using NaBH₄ in the presence of N-OMC. The synthesized Au@N-OMC was characterized by XRD, SEM, TEM, XPS, BET and EDS, which showed the successful decoration of Au nanoparticles on the surface of mesoporous carbon. Au@N-OMC showed high catalytic activity in the remediation of nitroaromatic pollutants from wastewater by reduction to the corresponding aniline derivatives. The kinetics of the Au@N-OMC-catalyzed reduction of 4-nitrophenol was investigated, which showed that the reduction in the presence of excess amount of NaBH₄ reductant, followed pseud-first-order kinetics. Three methods were carried out to investigate the reusability of the Au@N-OMC catalyst, which showed that the recycled catalyst could be reused several times without significant changes in catalytic activity. The leaching test was also performed by separating the Au@N-OMC catalyst at the half time of the reaction, revealing the heterogeneity of the catalyst.

This study reveals that incorporating silane-coupling agents such as KH560, KH590, KH570, and KH550 into the resin matrix can improve the epoxy mechanical performance as well as the interfacial interaction between basalt fibers and modified epoxy. The increasing silane contents slightly increased thermal stability and char yields. The study also found that amino-silane coupling agents, particularly KH550, demonstrated better thermal stability enhancement. Pure epoxy had a Tg of 91.4 °C, while epoxy had modified with 9wt% KH550 exhibited the highest Tg of 98.7 °C. For instance, at 6 wt% concentration of KH560, KH590, KH570, and KH550, the flexural strength of the epoxy matrix increased by 69.4%, 57.6%, 83.4%, and 84.7%, respectively. When the content of KH590, KH570, and KH550 is 9 wt%, the tensile increases by 77.6, 49.0, and 79.6%, respectively. The W-BFs/epoxy composite flexural strength enhanced by 65.3, 81.5, and 74.5%, respectively. The compatibilizing agent would react with the silicon hydroxyl groups on the surface of the basalt fibers, as well as with the epoxide in the resin. This would create a Si-O-Si new bond, which would make the connection between the modified epoxy and the basalt fibers stronger. This process is favored for its cost-effectiveness and user-friendly operation.

Graphical Abstract

In the realm of battery separator membranes, polyethylene microporous membranes hold significant promise due to their high density, robust mechanical properties, and eco-friendliness. Thermally-induced phase separation (TIPS) stands out as a crucial technique for fabricating polyolefin microporous membranes. Existing research has predominantly focused on leveraging TIPS technology to enhance the electrochemical performance of such membranes, overlooking a comprehensive grasp of the film formation process within TIPS. This study delves into the detailed TIPS film formation process of a high-density polyethylene (HDPE)/dioctyl phthalate (DOP) film-forming system. Based on experimental findings, there existed a discernible relationship among the blade coating thickness (δ_s), HDPE mass fraction (ω_H), and final film thickness (δ_f). When δ_s is determined, δ_f exhibits an initial increase followed by a subsequent decrease as ω_H increases. Infrared thermal imaging (ITI) technology was employed to in-situ track the location of phase interface in the HDPE/DOP system, revealing that heightened film scraping thickness and increased HDPE content jointly led to a gradual deceleration in the system’s cooling rate. The utilization of a four-parameter model (FPM) to fit the cooling curves of the HDPE/DOP melt blend under 20 °C quenching in air conditions displayed an exceptional degree of conformity (with all regression coefficients exceeding 0.99). Parameter D in FPM was influenced not only by the polymer property but also by ω_H and δ_f, and our findings revealed that with ω_H set at 30% and δ_s at 200 μm, parameter D approached a value of 4. The present work advances the current comprehension of the formation process of HDPE TIPS films and furnishes pivotal insights for optimizing the thermodynamics and process variables essential for solidification of HDPE TIPS films in practical applications.

The physical properties of CdLiCl₃ halides have been investigated for potential energy renewable applications by subjecting it to pressures up to 8 GPa based on DFT using Wien2k. The PBE_sol-GGA method was employed to calculate the lattice constant of CdLiCl₃ and the result is quite consistent with the existing measurement. Our findings confirmed the mechanical, thermodynamic and structural stability of the cubic phase through criteria such as Born mechanical stability, formation energy and phonon dispersion plot. Additionally, the assessment of ductile strength has been determined using critical limit of Pugh ratio (> 1.75) and Poisson’s ratio (> 0.26). A varying pressure range spanning from 0GPa to 8GPa was systematically investigated with an increment of 2 GPa to analyze the impact of pressure on band structure. A reduction in band gap from 1.60 eV to 15.2 eV has been observed in CdLiCl₃ halides when 0 to 8 GPa pressure was applied. This reduction in bandgap affects the various optical parameters including absorption, refraction, reflection and optical loss factor. Moreover, comprehensive analysis on thermoelectric features has been taken into account, encompassing the assessment of electrical and thermal conductivities, Seebeck coefficient and power factor. Notably, the material exhibited a minimal reflection alongside maxima absorption within the visible spectrum range and observed thermoelectric features, signifying its crucial importance in energy-harvesting devices.

This paper presents highly efficient synthesis to address the widespread environmental problem of pharmaceuticals polluting. Through nanocomposite exhibits remarkable catalytic prowess, thereby advancing the efficacy of water treatment processes. Fe₂VO₄ and g-ZnO (green synthesized ZnO) were separately synthesized via hydrothermal method. Whereas, Chitosan (CS) was fabricated via ionotropic gelation method. Finally, the Fe₂VO₄/CS/g-ZnO nanocomposite was fabricated by common stirring method, which undergoes investigated by multiple techniques such as XRD to know the average crystallite size (25 nm). Whereas, SEM and TEM used to identify the morphology. Optical properties such as UV–Vis DRS used to find-out the band gap (1.9 eV and PL shows the recombination rate. EIS shows the effective charge transfer. The surface area was investigated by using BET (6.10 m² g⁻¹) and TGA-DTA (stability at 500 to 700 °C), the samples were used to study the Chloramphenicol (CAP) degradation in water when exposed to visible light. The photocatalytic degradation of was studied using the Fe₂VO₄/CS/g-ZnO nanocomposite, achieving an efficiency of 91.5% under optimal conditions of 40 mg of catalyst dosage and 10 mg/L initial CAP concentration, following pseudo-first-order kinetics with a rate of 0.0351 min⁻¹. It was determined that the main reactive species in charge of CAP degradation were hydroxyl radicals and holes. At last, a workable charge transfer mechanism was put forth into account for the generation of the reactive species, and GC–MS analysis was utilized to monitor the CAP degradation path. Above results address a crucial problem in modern environmental research by making a substantial contribution to the development of environmentally friendly and sustainable water purification methods that protect aquatic ecosystems.

Energy production has become a major issue in the modern era of meeting energy demands. In this regard, we examined the mechanical, optical, electronic, structural, and thermodynamic characteristics of RbX₂Ta₃O₁₀ (X = Ca and Mg) perovskite compounds by using the CASTEP code’s based GGA-PBE approach. RbX₂Ta₃O₁₀ (X = Ca and Mg) has a tetragonal-based structure with the space group p4/mmm (123) and the structure is stable according to formation energy − 7.579 eV and − 8.167 eV. According to findings, RbCa₂Ta₃O₁₀ and RbMg₂Ta₃O₁₀ material’s electronic characteristics suggest that they have semiconductor behavior with indirect bandgap of 1.56 eV and 1.42 eV, respectively. To understand the relationship between light and its interaction with matter, the optical characteristics of substances were calculated and addressed in terms of the energy of photons. Mechanical properties analysis revealed that RbMg₂Ta₃O₁₀ is a material with ductility (B/G = 2.04), while RbCa₂Ta₃O₁₀ is brittle (B/G = 0.58). Elastic constant values are used to compute the following thermodynamic properties of RbCa₂Ta₃O₁₀ and RbMg₂Ta₃O₁₀: density (5.966, 5.854) g/cm³, average sound velocity (3827.679, 3005.348) m/s, minimum thermal conductivity (1.091, 0.952) W/mK, melting temperature (842.370, 1147.290) K, and Debye temperature (440.438, 233.496) K. Our examination expected that these materials can be used in visible light photocatalytic processes devices to split water.

The present study looks into the ({text{TaCu}}_{3}{text{rm X}}_{4} (text{rm X}=text{S},text{ Se},text{Te})) compounds’ structural, mechanical, electronic, thermodynamic, optical, as well as thermoelectric attributes using a First-Principles computational method based on the Density-Functional theory (DFT) methodology. Initially, the implementation of the PBE-GGA approach was done to determine the lattice constants of the understudied compounds. A thorough analysis of the binding energy calculations has been performed to determine the structural stability of selected chemicals. Additionally, the study of elastic stiffness constants is utilized to evaluate the mechanical stability. It has been reported that the ({text{TaCu}}_{3}{text{rm X}}_{4}(text{rm X}=text{S},text{ Se},text{Te})) compounds are mechanically stable due to fulfillment of Born-Stability criteria (({C}_{44}<0)). Through the determination of Pugh’s along with passion ratios as well as the Cauchy pressure, the ductile and the brittleness nature of the ({text{TaCu}}_{3}{text{rm X}}_{4}(text{rm X}=text{S},text{ Se},text{Te})) compounds have been established. An analysis of the electronic band structure, total density of states, as well as partial density of states was performed in order to ascertain the electronic features. It has been shown that the compounds ({text{TaCu}}_{3}{text{rm X}}_{4}(text{rm X}=text{S},text{ Se},text{Te})) exhibit indirect band gaps of 1.71, 1.65 and 0.14 eV, respectively. The thermodynamic stability of the materials under investigation was depicted by the computation of the Born-criteria along with binding energy. We have computed and evaluated a number of optical characteristics. In addition to presenting opacity at lower incoming photon energy levels, the selected compounds display considerable optical conductivity as well as absorption coefficients when subjected to energetic beams of photons. Moreover, (text{BoltzTraP}) coding was utilized to evaluate the examined compounds ({text{TaCu}}_{3}{text{rm X}}_{4}(text{rm X}=text{S},text{ Se},text{Te})) potential for thermoelectric uses. Based on an analysis of the Seebeck coefficient, electric and thermal conductivity, and power factor, it seems that the studied-compounds have potential to be effective candidates for applications in thermoelectric technology.

In this groundbreaking study, we successfully synthesized pristine La nanoparticles and Cu-La composites with varying concentrations (25, 50, and 75% Cu) via precipitation technique which yielded a dual-phase with significantly reduced crystallite size from 39.9 nm to 27.3 nm as evidenced by X-ray diffraction (XRD) analysis. Moreover, Field Emission Scanning Electron Microscope (FE-SEM) imaging revealed a striking transformation from rice-like nanoparticles in pure La to spherical nanoparticles with uniform distribution in Cu-La composites, and X-ray Photoelectron Spectroscopy (XPS) analysis confirmed the formation of La³⁺ and Cu²⁺ ions with spin-orbit splitting energy levels in CuO-La₂O₃ composites consistent with XRD and FT-IR results. Additionally, the band gap energy calculated from optical absorbance ranged from 3.447 to 2.276 eV indicating potential for optoelectronic applications and furthermore, the thermionic-emission (TE) model was employed to extract the ideality factor (n) and barrier height (Ф_B) from I-V characteristics, yielding an optimal n and Ф_B which corresponding to 1.70 and 0.89 eV under both light and dark conditions thereby making this material a promising candidate for optoelectronic devices.