Chemical Papers最新文献

Management of wound infection has remained a significant challenge. Silver nanoparticles (AgNPs) have been identified as a potent antibacterial agent to prevent and reduce infection in wounds. The objective of this study was to examine the impact of improved green synthesis process by Allium iranicum extract. In this regard, AgNPs were synthesized in various pH, temperature, and time conditions to optimize the best situation. Moreover, the physico-chemical characteristics of synthesized AgNPs were assessed using UV–Vis spectroscopy, FTIR, XRD, zeta potential, DLS, FESEM, EDX, and TEM. Furthermore, the biological properties of synthesized AgNPs were evaluated by cell viability assay, blood compatibility assay, and antibacterial performance. The results of this study revealed that the green synthesized AgNPs by Allium iranicum extract resulted in the production of nanoparticles with an average diameter of 11.15 ± 4.198 nm and a relatively uniform distribution. In addition, a significant reduction in toxicity against fibroblasts and a significant decrease in hemolysis rate were observed in all doses in contrast to the control group. Additionally, its distinctive antibacterial characteristics against gram-positive and gram-negative bacteria substantiated its efficacy in wound infections. Altogether, the tailored synthesis of AgNPs may provide a potent biocompatible and antibacterial agent for managing severe wound infections.

Nickel metal matrix composites (NMCs) are advanced materials that integrate nickel with various reinforcements to enhance mechanical strength, thermal stability, and corrosion resistance. This review explores key synthesis techniques, including powder metallurgy, electrodeposition, and additive manufacturing, and their impact on composite performance. The incorporation of nanomaterials such as graphene, carbon nanotubes, and ceramic nanoparticles significantly improves wear resistance, mechanical strength, and thermal stability. Additionally, surface modifications through coatings, such as thermal spraying, electroless plating, and nano-coatings which further enhance functional properties for industrial applications. NMCs find extensive use in aerospace, automotive, biomedical, and energy sectors due to their superior durability and strength-to-weight ratio. Sustainability considerations, including recyclability and eco-friendly processing techniques, are also discussed. Furthermore, artificial intelligence is emerging as a powerful tool for accelerating material innovation by optimizing NMC design, process control, and property prediction. This paper provides a comprehensive review of NMCs, offering insights into their current advancements and potential future directions in intelligent material design and composite manufacturing.

Alkaloids, flavonoids, tannins, and essential oils present in flowers demonstrate exceptional effectiveness in preventing corrosion. These moieties adsorb onto metal surfaces, creating a protective barrier that minimizes interaction with corrosive environments. Flower extracts are gaining recognition as eco-friendly corrosion inhibitors because of their natural abundance, affordability, and minimal environmental impact. This article delves into the essential elements of leveraging flower extracts for corrosion prevention, covering their working mechanisms, varieties of extracts employed, preparation techniques, efficacy, and possible uses.

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An eco-friendly approach was employed to develop cobalt ferrite (CoFe₂O₄) nanoparticles (CF MNPs) and graphene oxide (GO) based CoFe₂O₄ magnetic nanocomposites (GO-CF MNCs) using star anise fruit extract (SAFE) as a natural reducing and stabilizing agent. GO was synthesized via an improved Hummer’s method, while CF MNPs and GO-CF MNCs were prepared through a green co-precipitation route. The active involvement of SAFE in nanoparticle formation was confirmed through Fourier Transform Infrared (FT-IR) spectroscopy, which showed a significant reduction in the intensity of phytochemical functional groups alongside the appearance of new characteristic bands confirming the formation of CF MNPs and GO-CF MNCs. Structural and morphological analyses was done using X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Dynamic light scattering (DLS), and UV–visible (UV–Vis) spectroscopy. The comparative adsorption performance of CF MNPs and GO-CF MNCs for the methylene blue (MB) dye was investigated, with an emphasis on pH, contact time, and surface charge interactions. The point of zero charge (pH@PZC) for GO-CF MNCs was determined, supporting the adsorption mechanism. Time-dependent studies revealed that GO-CF MNCs achieved a significantly higher removal efficiency (97%) than CF MNPs (89%) within 180 min. These findings underscore the potential of GO-CF MNCs as highly efficient, magnetically recoverable, and sustainable adsorbents for wastewater treatment applications.

Groundwater fluoride contamination is a serious global issue that impacts many areas, particularly in developing countries. While excessive quantities of fluoride in drinking water can have major negative health effects, lower dosages are beneficial for teeth. This study examines the adsorption of fluoride ions from water by tamarind seeds derived from household trash that have been doped with magnesium metal in the form of TAM SE-Mg NPs.The findings demonstrated that we investigated several elements that influenced the manner in which adsorption took place when employing tamarind seeds to extract fluoride from water. The defluoridation capability increases with temperature. Since the kinetic data consistently fit the Freundlich adsorption isotherm and pseudo second order kinetics, these models can be trusted to predict the behavior of the reaction and adsorption processes. The Tamarind-Mg extract was thoroughly characterized using SEM-EDX, TGA, DTA, and FTIR analysis, ensuring an acceptable identification and investigation of its characteristics. A well-diffusion method was used to test the antibacterial effectiveness of TAM SE-Mg NPs extract.The extract was evaluated against Bacillus megaterium and Streptococcus. At a dose of 5g/mL, TAM SE-Mg NPs extract showed zones of inhibition (ZOIs) of 1.05 ± 0.064 cm against B. megaterium and 1.19 ± 0.027 cm against Streptococcus. Ampicillin was used as a positive control in our experiment, yielding a ZOI of 2.01 ± 0.038 cm. The results of the variance analysis showed that the Response Surface Methodology (RSM) was successful in eliminating sodium fluoride and that the model suited the data well. Studies show that tamarind seed extract (TAM SE-Mg NPs) is more successful in stopping bacterial development. Overall, Tamarindus indica Seed’s extract with Mg doped nanoparticles successfully applied for fluoride detoxification and hindered microbial activities

Corrosion is the destruction of materials, usually metal, by a reaction with the environment, and is contrary to metallurgy, which depends on factors, such as environment, stress, temperature, and erosion. It is an important aspect in every form of life, from personal to professional spheres of life. It causes a huge loss to human health and the environment. Their method of synthesis is also ineffective. Therefore, the use of inhibitors becomes an effective method for protecting metals against corrosion. This paper aims to use inhibitors derived from plants as potential green corrosion inhibitors for an eco-friendly environmental input and plant-based-derived nanoparticles/materials that can also be used in various biomedical and engineering applications. In this paper, we present the corrosion problem in the environment, and industry and why plant extracts green inhibitors are a good alternative as corrosion inhibitors for corrosion control and prevention and where we can also, therefore, make improvements in the study by using plant-based nanoparticles as corrosion inhibitors as they are safe, less cost-effective and can be used in wide range.

This study screened the corrosion mitigation potential of quinoline derivative (QDCC) for Q235 steel protection in a 5 M HCl medium. The techniques used for examination include weight loss, electrochemical (100 mg/L to 400 mg/L), SEM/EDX, AFM, XPS, DFT, and MD. As QDCC doses increased, the corrosion prevention capacity was successfully improved. The PDP findings showed that QDCC functions as a mixed-type inhibitor, promoting the inhibition of both cathodic and anodic processes. The maximum and minimum charge transfer resistance (R_ct) and double-layer capacitance (C_dl) are 515.0 Ω cm⁻¹ and 186.0 μF/cm² with the addition of QDCC, indicating the corrosion inhibition mitigation. Temkin is the most accurately fitted isotherm that illustrates the chemical adhesion potential of QDCC upon the Q235 steel with ΔG^o_ads equals to − 43.49 kJ/mol. The surface study approaches like SEM/EDX, AFM, and XPS showed that the QDCC is strongly adhered over Q235 steel surface. The computation examination, which included DFT and MD, showed that neutral-QDCC forms are strongly adsorbing compared to protonated ones.

Macadamia is a key tree nut crop with global production surpassing 300,000 tons, and has created a significant amount of nut waste. Macadamia nut waste is constituted of 70–77% of the nut weight, and with inadequate disposal methods, this waste can pose a great threat to the environment. The chemical composition of macadamia nutshells is rich lignocellulosic materials, essential for bio-based applications such as biofuels, bioplastics, biocomposites, and other industrial uses. By valorizing macadamia nut waste into high-value products, environmental impacts can be mitigated to reduce disposal costs, and enhance the economic value of byproducts. This review also emphasizes the importance of innovative waste management strategies and explores the feasibility of utilizing macadamia nut waste in various applications. Therefore, macadamia nut waste can be an abundant and valuable and precursor for green economy and sustainable development.

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Nanostructured electrode materials are a promising area of study due to the impending energy demands of subsequent generations caused by our excessive reliance on fossil fuels. The long life, high power density and many environmental and financial advantages of supercapacitors make them an innovative, eco-friendly energy storage solution. This  work describes the MoS₂/g-C₃N₄ (MS/GCN) electrode material’s structural development and electrochemical performance. The material was prepared using a hydrothermal process, which resulted in a notable increase in specific capacitance (C_s) and exceptional long-term stability throughout cycling. Physical tests like, Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), X-ray diffraction can study the physical properties of manufactured electrode. Electrochemical study of manufactured materials was assessed using, galvanostatic charging/discharging (GCD), chronoamperometry (CA), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). MoS₂/g-C₃N₄ (MS/GCN) composite exhibited C_s was 818.27 F/g at 1 A/g current density (J_d) with power density (P_d) of 390 W/Kg and energy density (E_d) of 69.13 Wh/kg. The composite remained stable for 50 h after the 5000th cycle, demonstrating high cyclic stability. This work demonstrated that fabricated MS/GCN is an outstanding for energy storage devices.

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