jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Komal Farooq | Mohsin Siddique | Khalid J. Alzahrani | Khalaf F. Alsharif | Fuad M. Alzahrani
Source: Progress in Reaction Kinetics and Mechanism (article, 2025-01-01)
Field: Chemistry — Inorganic Chemistry

Zinc-based metal–organic frameworks for high-efficiency adsorption of Pb(II) and Cu(II) ions from an aqueous solution: synthesis, characterization, and performance evaluation Heavy metal ions in water can be extremely toxic, even in trace amounts, endangering the ecosystem and posing serious threats to the natural environment. Therefore, their removal from contaminated water is of utmost importance. Among various methods, adsorption has proven to be one of the most effective techniques for treating water contaminated with heavy metals. Due to unique structural and dimensional properties, metal–organic frameworks have drawn ample research interest as effective metal ion adsorbents. This study focuses on adsorption process for the removal of lead (Pb) and copper (Cu) ions from polluted water. A new metal–organic framework was synthesized using simple, easy, cost-effective single-step synthesis method. Nanoadsorbent metal–organic frameworks exhibited excellent stability, a large surface area, and prominently exposed active sites for lead (II) and copper (II) ions. Batch adsorption experiments at 30 °C showed the removal of 98.7% of copper (II) and 99.5% of lead (II) ions at pH 4.5 and 8 in 60 and 90 min, respectively. Similarly, the maximum adsorption capacity was found to be 19 and 29 mg/g, for Cu(II) and Pb(II) ions, respectively. A 10-fold increase in crystallite size was observed after three cycles of using the material untreated for Pb(II) removal, giving a removal efficiency greater than 90%. Adsorption followed pseudo-second-order kinetics and best fit the Langmuir adsorption isotherm for both metal ions. This adsorption behavior can be easily explained by the value of the point of zero charge. Moreover, thermodynamic studies reveal that the adsorption process for heavy metal ion removal is spontaneous and entropy-driven, and involves the endothermic adsorption reaction. Chemistry ; Aqueous solution ; Adsorption ; Zinc ; Metal-organic framework ; Inorganic chemistry ; Characterization (materials science) ; Metal ions in aqueous solution ; Ion ; Metal ; Copper ; Nuclear chemistry ; Organic chemistry ; Nanotechnology Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Chemical Synthesis and Characterization
Authors: Hana M. Abumelha | Razan M. Snari | Sara A. Alqarni | Abdullah A.A. Sari | Amnah S. Al Zbedy | Ameena M. Al‐bonayan | Ali Sayqal | Nashwa M. El‐Metwaly
Source: Journal of Saudi Chemical Society (article, 2025-10-29)
Field: Materials Science — Materials Chemistry

Effective elimination of industrial dye using AlCo-layered double hydroxide coated with β-Cyclodextrin and polyethyleneimine: adsorption isotherm, kinetics and optimization through Box-Behnken design A new composite hydrogel bead, composed of AlCo-layered double hydroxide (AlCo-LDH) incorporated into a β-cyclodextrin (β-CD) and polyethyleneimine (PEI) matrix, was synthesized through the encapsulation process, followed by crosslinking with epichlorohydrin. This multifunctional material was specifically designed for the actual elimination of Basic Fuchsin (BF) dye from water. Analytical methods counting PXRD, FT-IR, XPS, FESEM, and EDX were utilized to validate the crystalline architecture, assess chemical interactions, and examine the porous morphology of the hybrid beads. UV–visible spectroscopy demonstrated a peak absorption for BF dye at 542 nm, which was utilized to track the adsorption process. The adsorption dynamics were notably influenced by aspects like the initial dye concentration, contact period, pH level, adsorbent dosage, and temperature fluctuations (between 20 and 45 °C). The maximum dye removal capacity recorded was 430.76 mg/g at pH 8, using 0.02 g of the adsorbent in a 25 mL dye solution. Post-adsorption analysis indicated a decrease in surface area, pore size, and volume, providing evidence of successful dye capture within the hydrogel structure. The adsorption mechanisms were analyzed and were determined to align with the model of Langmuir isotherm, exhibiting pseudo-second-order kinetics. This indicates a process predominantly characterized by monolayer chemisorption, with an activation energy calculated at 31.6 kJ/mol. A thorough thermodynamic evaluation produced parameters (ΔH° = + 78.57 kJ/mol, and ΔS° = + 276.4 J/mol.K) which suggest that the adsorption procedure is both spontaneous and endothermic. The fundamental mechanisms driving the adsorption involve interactions such as π–π stacking, electrostatic forces, hydrogen bonding, and effects related to pore-filling. Importantly, this synthesis marks the first instance of integrating β-CD and PEI within the AlCo-LDH framework, resulting in a stable hydrogel bead that enhances both adsorption efficacy and reusability. Moreover, the application of optimization techniques such as Box-Behnken Design (BBD) and Response Surface Methodology (RSM) has led to a notable enhancement in process efficiency. This underscores the capability of AlCo-LDH/CD-PEI beads to function as effectual adsorbents in the dealing of wastewater polluted with dyes. Adsorption ; Monolayer ; Kinetics ; Hydroxide ; Langmuir adsorption model ; Porosity ; Absorption (acoustics) Layered Double Hydroxides Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Fluoride Effects and Removal
Authors: K. Stewart | Francesca J. Lombardi | Sky Cao | Claire M. Massouh | Jacob J. Lessard
Source: Advanced Materials (article, 2025-12-23)
Field: Chemistry — Organic Chemistry

Engineering Free Volume within Frontal Ring‐Opening Metathesis Polymerization via Pendant Plasticization Frontal ring-opening metathesis polymerization (FROMP) enables rapid, energy-efficient access to high-performance thermosets and thermoplastics, but the range of accessible properties remains constrained by the rigidity of norbornene-type backbones. Here we introduce a side-chain plasticization strategy for FROMP, wherein norbornene esters bearing n-alkyl groups of varying length (n = 8, 12, 16) are copolymerized with dicyclopentadiene (DCPD) or hydrogenated DCPD (DCPD-H<sub>2</sub>). Systematic incorporation of these pendants tunes free volume, resulting in predictable reductions in glass transition temperature (T<sub>g</sub>), decreased moduli, and a transition from rigid thermosets to elastomers exceeding 800% elongation at break. Free-volume analysis via dynamic mechanical analysis and solvent swelling ratios confirms pendant length and distribution as key parameters governing network porosity and mobility. Moreover, high-alkyl-content formulations exhibit nonlinear front propagation (spin modes) and strain-induced whitening-features that highlight opportunities for spatial patterning and cooperative molecular alignment under load. Collectively, these results establish side-chain engineering as a versatile design principle for expanding FROMP into elastomeric regimes, providing a scalable pathway to soft, tunable, and structurally programmable materials. Norbornene ; Dicyclopentadiene ; Elastomer ; Glass transition ; Thermosetting polymer ; Polymerization ; Ring-opening metathesis polymerisation ; ROMP Photopolymerization techniques and applications ; Nanofabrication and Lithography Techniques ; Advanced Polymer Synthesis and Characterization
Authors: Samriti Vaid | Sanyog Sharma | Varinder Kaur | Raj Kumar Arya | Bharat Bajaj | Bhavna Vaid | George D. Verros | Devyani Thapliyal
Source: Journal of Engineering (article, 2025-01-01)
Field: Materials Science — Biomaterials

Making Use of Local Waste: Adsorptive Removal of Novacron Red FN‐2BL Using CTAB‐Aided Sodium Hydroxide–Pretreated Jute Fibers The purpose of our work was to increase the efficacy of jute fibers through the application of two successive treatments: sodium hydroxide (NaOH) and cetyltrimethylammonium bromide (CTAB). The goal was to remove the dye Novacron Red FN‐2BL from wastewater. We thoroughly investigated how different parameters, such as initial concentration of dye (20–100 mg/L), adsorbent dosage (0.01 g–0.10 g), contact time (2–16 min), pH (from 2 to12) and temperature (298, 308, and 318 K) affected the kinetics of removal of dye. The removal efficiency of reactive dye Novacron Red FN‐2BL by the jute treated with surfactant CTAB (JST) adsorbent peaked at 95% using 0.05 g/50 mL dye solution, an initial concentration of dye of 40 mg/L, pH 7, contact time of 8 min, and temperature of 298 K. A thorough understanding of the process of adsorption was made possible by our experimental setup, and the data fit effectively into a variety of isothermal and kinetic models. In particular, the adsorption behavior was well‐represented by the Langmuir isotherm model, and the adsorption kinetics followed a pseudo‐second‐order model. Notably, a remarkable 74.63 mg/g of monolayer adsorption was possible at 318 K. An endothermic adsorption phenomenon is reflected by the increasing value of K F (Freundlich’s constant) on rising temperature. Furthermore, the Dubinin–Radushkevich isotherm demonstrated a physisorption‐like mechanism for the adsorption of Novacron red FN‐2BL dye on JST; the magnitude of E , which varied from 1.29 to 2.24 KJ/mol when the temperature rose from 298 to 318 K, indicated the process’s temperature dependence. With respect to thermodynamics, the Δ H ∗ value was found to be 11.73 KJ/mol, and the Δ S ∗ value was determined as 65.74 J/mol/K. An entropy‐driven nature, spontaneity, and feasibility of Novacron Red FN‐2BL adsorption on JST are highlighted by the positive Δ S ∗ and consistently negative Δ G ∗ (ranging from −7.87 KJ/mol to −9.19 KJ/mol, across all temperatures). Sodium hydroxide ; Nuclear chemistry ; Sodium alginate ; Sodium ; Pulp and paper industry ; Materials science ; Chemistry ; Chemical engineering ; Organic chemistry ; Metallurgy Electrospun Nanofibers in Biomedical Applications ; Adsorption and biosorption for pollutant removal ; Advanced Cellulose Research Studies
Authors: Adaku Chinonyerem Ajiwe | Patrice A. C. Okoye | Uche Eunice Ekpunobi
Source: Health and Environment (article, 2025-08-19)
Field: Materials Science — Materials Chemistry

Comparative Evaluation of the Structural and Adsorptive Properties of Modified and Unmodified Cucurbita moschata Seed Husk for Crude Oil Spill Clean-up This study investigates the structural and adsorption properties of modified and unmodified Cucurbita moschata seed husk with a view to evaluating its potential as a low-cost bio-sorbent for crude oil clean-up. The raw seed husk was subjected to chemical modification through acetylation, aiming to enhance its surface characteristics and functional group availability. Comprehensive characterizations were conducted using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and surface area analysis to determine changes in morphology and functional groups. Batch adsorption experiments were carried out to assess the sorption efficiency of both modified and unmodified Cucurbita moschata seed husk in removing crude oil from aqueous solutions under varying conditions of contact time, catalyst usage. Adsorption kinetics and isotherm models, including first-order, pseudo-second-order, Intra diffusion, Freundlich, Langmuir and Temkin were applied to interpret the experimental data. The results revealed that acetylation significantly improved the surface roughness, porosity and active binding sites of the sample, leading to enhanced oil uptake capacity. The modified Cucurbita moschata seed husk exhibited superior adsorption efficiency, with equilibrium data fitting well to the Freundlich isotherm and Pseudo-second order kinetic model, indicating multilayer adsorption on a heterogeneous surface. These findings suggest that modified Cucurbita moschata seed husk, holds promising potential as a sustainable, ecofriendly, and effective adsorbent for treating oil spill clean-up in our environment Cucurbita moschata ; Husk ; Crude oil ; Environmental science ; Chemistry ; Pulp and paper industry ; Botany ; Petroleum engineering ; Biology ; Engineering Pickering emulsions and particle stabilization
Authors: Yadong Yin | Xin Wang | Han Hao | Xiaolei Zhao | Jinxing He
Source: Research Square (preprint, 2025-06-23)
Field: Chemistry — Analytical Chemistry

Enrichment and detection of sulfadimethylpyrimidine in food by magnetic molecularly imprinted photonic crystals Molecularly imprinted polymer ; Photonic crystal ; Materials science ; Chemistry ; Optoelectronics ; Organic chemistry ; Selectivity Analytical chemistry methods development ; Analytical Chemistry and Chromatography ; Dye analysis and toxicity
Authors: Estelle Nkene Mezui | Loïc Brancheriau | Samuel Ikogou | Rostand Moutou Pitti
Source: BOIS & FORETS DES TROPIQUES (article, 2025-06-15)
Field: Chemistry — Organic Chemistry

Linking near-infrared spectroscopy of 25 tropical Gabonese hardwoods to tree ecological temperament To use wood species appropriately and optimally, it is imperative to know their chemical composition. The application of near-infrared spectroscopy (NIRS) provided a valuable approach to correlate wood properties with tree ecological traits and their adaptive responses. The study aim was to verify that different chemical compositions exist for a wide range of species grouped into distinct ecological temperaments. Thus, 25 tropical Gabonese hardwoods, mainly secondary species, were studied and divided into three ecological temperaments: pioneer, hemi-heliophilous, and shade-tolerant. The spectra studied were obtained using a Spectrum Two N spectrometer (PerkinElmer) on the transverse faces of 368 unground samples of heartwood by reflectance in the range 1000 to 2500 nm. These were then subjected to pre-processing (standard normal variable and second derivative), followed by principal component analysis and partial least squares discriminant analysis. The discrimination model used showed high performance in cross-validation and prediction at 93.2% and 88.3%, respectively. The results indicated differences in NIRS signatures between the three ecological temperaments. The hemi-heliophilous and shade-tolerant species had similar NIRS signatures but different concentrations of chemical compounds (derived from NIRS spectra analysis). The pioneers had a different profile from the other two ecological temperaments. No significant difference in cellulose content was found between the three ecological temperaments. Hemicelluloses and lignin concentrations were higher in the shade species. The pioneer species had significant levels of extractives. Temperament ; Partial least squares regression ; Range (aeronautics) ; Botany ; Chemistry ; Ecology ; Biology ; Mathematics ; Materials science ; Statistics Wood and Agarwood Research ; Forest ecology and management ; Wood Treatment and Properties
Authors: A. V. S. S. Prasad
Source: ChemRxiv (preprint, 2025-07-02)
Field: Chemistry — Inorganic Chemistry

CO₂ Separation Using Zeolite-Based Adsorbents and Mixed Matrix Membranes Reducing CO₂ emissions from human activities is a major environmental challenge. Zeolites are widely studied for this purpose because their pore structures and surface properties can be tailored for gas separation [1–3]. Techniques such as amine grafting, silane treatment, and ion exchange have improved their performance for CO₂ capture [4–6]. Work on creating zeolite nanoparticles, fibers, and foams has helped address mass transfer limitations and made it easier to incorporate zeolites into mixed matrix membranes (MMMs) [7–9]. This review summarizes these developments and discusses remaining challenges for scalable, sustainable CO₂ separation. Zeolite ; Membrane ; Adsorption ; Separation (statistics) ; Matrix (chemical analysis) ; Chemical engineering ; Materials science ; Chemistry ; Chromatography ; Mathematics ; Organic chemistry ; Engineering ; Catalysis ; Statistics Zeolite Catalysis and Synthesis ; Membrane Separation and Gas Transport ; Catalytic Processes in Materials Science
Authors: J. M. Lavita | H. Basappa | S. Asha | M. A. Arpitha | S. Thripthi | Y. Sangappa
Source: Research Square (preprint, 2025-10-08)
Field: Materials Science — Biomaterials

Fabrication, characterization and methylene blue dye adsorption study of silk microparticles containing gold nanoparticles Methylene blue ; Adsorption ; Colloidal gold ; X-ray photoelectron spectroscopy ; Transmission electron microscopy ; Scanning electron microscope ; Fibroin ; Langmuir adsorption model ; Dynamic light scattering ; Nanoparticle Silk-based biomaterials and applications ; Nonlinear Optical Materials Studies ; Dyeing and Modifying Textile Fibers
Authors: P. Naveen | Gopi Mamidi | Amrita Priyadarsini
Source: Research Square (preprint, 2025-12-15)
Field: Materials Science — Materials Chemistry

Green Fabrication of Alginate–Silver Nanocomposite Hydrogel Using Premna serratifolia Leaf Extract: Characterization, Comparative Evaluation, and Enhanced Antimicrobial Efficacy” Nanocomposite ; Antimicrobial ; Zeta potential ; Fourier transform infrared spectroscopy ; Nanoparticle ; Nanomaterials ; Aqueous solution ; Composite number Nanoparticles: synthesis and applications ; Wound Healing and Treatments ; Seaweed-derived Bioactive Compounds
Authors: Md S Ahmmed | A. K. M. Mohiuddin
Source: Journal of Engineering Science (article, 2025-06-24)
Field: Chemistry — Organic Chemistry

Highly Effective Removal of Ciprofloxacin from Aqueous Solution Using Graphene Oxide Functionalized Zeolite Graphene oxide (GO) functionalized zeolites (ZGO) was synthesized as an adsorbent for swift and successful removal of the ciprofloxacin (CIP) antibiotic. The as-prepared nanocomposite was characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), and RAMAN spectroscopy. The adsorption ability of ZGO for CIP was investigated at different pH (2-11), contact time (5-120 min), and adsorbent dosage (0.1-0.75 g L-1) to obtain the optimum condition for maximum removal percentage of target adsorbate. The results provided very fast (15 min only) highly effective removal of CIP (97.67%) for 0.25 g L-1 ZGO, while the pH of the aqueous solution was 7.0. Kinetic and isotherm analysis of this study indicated that the adsorption process happened on the multilayer and heterogeneous surface of ZGO and was carried out by a chemical reaction between CIP and ZGO. The highest adsorption capacity (qm) was calculated as 61.35 mg g-1 at 40°C, while 8.28 and 12.45 mg g-1 were at 20, and 30°C, respectively, which suggested the stimulation of greater sites of ZGO surface with the increment of temperatures during the adsorption process. Furthermore, strong stability and superior reusability of ZGO revealed that it could be a potential adsorbent for easy removal of CIP antibiotics from the aqueous solution. Journal of Engineering Science 15(2), 2024, 29-39 Graphene ; Zeolite ; Aqueous solution ; Oxide ; Materials science ; Ciprofloxacin ; Chemical engineering ; Inorganic chemistry ; Nanotechnology ; Chemistry ; Organic chemistry ; Catalysis ; Antibiotics ; Metallurgy Nanomaterials for catalytic reactions ; Extraction and Separation Processes ; Chemical Synthesis and Characterization
Authors: Yasir Ammar Emad Al-Kawaz | Auda Jabbar Braihi | Ali Salah Hasan
Source: Revue des composites et des matériaux avancés (article, 2025-12-31)
Field: Materials Science — Polymers and Plastics

Polymeric and Hybrid Membranes for Achieving Ultra-Low Sulfur Fuel Requirements This review aims to explore membrane-based alternative methods for removing harmful sulfur compounds in fuels to replace the inefficient conventional techniques.Membranebased methods provide an efficient route to achieve very low sulfur content in fuels (< 10 ppm), as required by international environmental policies.A systematic review of 42 experimental studies reported over the period from 2005 to 2025, being the timeframe that would most likely encompass an actual paradigm change in membrane-based technologies.The data were retrieved from scientific databases, including Scopus, Web of Science, ScienceDirect, and ACS, to evaluate the performance of polymer and composite membranes for desulfurization.Innovative membrane systems like polydimethylsiloxane (PDMS), polyethylene glycol (PEG), polyimide, and mixed-layer membranes (MMMs) were found to be highly effective in both evaporation-and permeability-based desulfurization processes.PEG-PI MMMs reinforced with metal organic frameworks (MOFs) demonstrated removal efficiencies as high as 80% and a permeability of > 200 g/mh, which were significantly higher compared to that for neat polymeric membranes.The key separation principles include diffusion-dissolution, facilitated transport with complexes (Ag, Cu, MOFs), and molecular sieving.Finally, in spite of challenges such as polymer swelling and stability remaining, polyethylene glycol (PEG) and polyimide (PI)-MMMs, especially those enhanced with metal-organic frameworks (MOFs), stand out as strategic industrial candidates due to the best balance of flow, selectivity, and stability.The future direction must urgently focus on long-term stability testing using real fuel streams rather than model fuels to confirm the practical viability of these integrated membranes. Membrane ; Sulfur ; Fuel cells ; Process (computing) ; Polymer Synthesis and properties of polymers ; Fuel Cells and Related Materials ; Membrane Separation and Gas Transport
Authors: Mariolino Carta
Source: Cronfa (Swansea University) (article, 2025-01-01)
Field: Materials Science — Materials Chemistry

A Perspective on the Applications of Triphasic Gas Storage in Electrochemical Systems Perspective (graphical) ; Electrochemistry ; Fuel cells ; Gas industry Advancements in Solid Oxide Fuel Cells ; CO2 Reduction Techniques and Catalysts ; Electrocatalysts for Energy Conversion
Authors: Afiq Anuar | Arman Edalat | Lea Ringelhan | Qiang Yu | Maximilian Baur | Albrecht Petzold | Thomas Thurn‐Albrecht | Stefan Mecking | Kay Saalwächter
Source: ChemRxiv (article, 2025-08-21)
Field: Materials Science — Polymers and Plastics

Impact of Carbonyl Group Incorporation in Semicrystalline High-Density Polyethylene Ketone-functionalization of polyethylene via copolymerization with carbon monoxide offers a promising route to introducing reactive carbonyl moieties while preserving the advantageous bulk properties of high-density polyethylene (HDPE). Here, we systematically investigate the influence of low-level (0.6--1.6,mol-%) keto incorporation on the thermal properties, semicrystalline morphology, crystallization, and chain dynamics of HDPE. Differential scanning calorimetry and small-angle X-ray scattering reveal only minor reductions in melting temperature and lamellar thickness. Complementarily, 1H NMR FID measurements reveal that KetoPE samples exhibit crystallinity-temperature profiles comparable to HDPE, indicating that the semicrystalline morphology is mainly preserved upon keto incorporation up to a few percent. Importantly, 13C T1 relaxation quantitatively confirms that intracrystalline chain diffusion coefficients are essentially unchanged. Notably, 1H spin-diffusion NMR confirms that presumably the isolated carbonyl moieties predominantly reside in the interphase. Thus, low-level ketone incorporation imparts additional reactivity or adhesion potential without compromising HDPE's mechanical or thermal integrity. Crystallinity ; Group (periodic table) ; Carbonyl group ; Polyethylene ; Polymer chemistry ; Chemistry ; Polymer science ; Organic chemistry ; Crystallography ; Medicinal chemistry Polymer crystallization and properties ; Cultural Heritage Materials Analysis ; Polymer Nanocomposites and Properties