jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Helan S. Omar | Parween Saleem | Mohammed A. Ibraheem
Source: Zanin Journal of Science and Engineering (article, 2026-03-30)
Field: Chemistry — Inorganic Chemistry

Adsorption Kinetics of Cr on Co-MOF-71 and NaOH-Treated MOF Thin Films Derived from PET Waste. In the present study, polyethylene terephthalate (PET) was used for the preparation of MOF thin film for the adsorption of chromium from aqueous solution. four kinetic models: pseudo-first-order, pseudo-second-order, intraparticle diffusion and Elovich were used for analyzing kinetics of chromium adsorption on MOFs thin film. Among these, the pseudo-second-order model best described the adsorption kinetics for both MOFs. At various concentrations (50, 100, and 150 mg/L) and temperatures (303, 313, and 323 K), the equilibrium adsorption capacities (Qe) of chromium were measured. The MOF thin films showed excellent pollutant efficiency. removal, showing that MOF1 (Co-MOF-71) and MOF2 (NaOH-treated Co-MOF-71) have favorable activation energies of 44.046 kJ/mol and 69.372 kJ/mol, respectively. FTIR spectra and SEM micro-graphs were used to confirm the films' characteristics. In conclusion, the MOF thin films demon-started high adsorption capacity for chromium removal from aqueous solutions, good thermal stability, water insolubility, low cost, and ease of preparation. Adsorption ; Chromium ; Aqueous solution ; Kinetics ; Thin film ; Diffusion Metal-Organic Frameworks: Synthesis and Applications ; Magnesium Oxide Properties and Applications ; Adsorption and biosorption for pollutant removal
Authors: Azar Etaati | Mansooreh Soleimani
Source: Scientific Reports (article, 2026-01-09)
Field: Chemistry — Inorganic Chemistry

Optimization and adsorption mechanisms of vanadium removal by Fe-Pillared bentonite as an efficient adsorbent The increasing use of vanadium causes environmental concern about the toxic effluents. In this study, Fe- pillared bentonite (Fe-PB) was synthesized from a domestic clay sample. Characterization ofiron- pillared bentonite by XRF, XRD, FTIR, BET and SEM, indicated the success of the pillaring operation. According to the results, the Fe-PB adsorbent has better properties compared to the NB. In removal experiments, the vanadium removal percentage has been investigated by varying different main parameters including pH (2-10), initial vanadium ion concentration (50-200 mg/L) and adsorbent dosage (1-6 g/L). A combination of Design-Expert software and response surface methodology was applied to determine the influence of each operational parameter on the vanadium removal percentage, optimum condition to reach maximum vanadium removal. Based on the predicted model, maximum vanadium removal onto Fe-PB was 59.96% on the optimum operational condition as pH = 5.82, initial vanadium concentration = 50 ppm and adsorbent dosage = 6 g/L at 3 h contact time. Equilibrium data were best described by Langmuir model, and analysis of kinetic data demonstrated that the pseudo-second-order model accurately represents the kinetic data. Vanadium ; Bentonite ; Adsorption ; Langmuir adsorption model ; Response surface methodology ; Kinetic energy Vanadium and Halogenation Chemistry ; Metal Extraction and Bioleaching ; Adsorption and biosorption for pollutant removal
Authors: Ut Dong Thach | Minh Huy | Nguyen Cong-Hau | Utkarsh Kumar | Tongsai Jamnongkan
Source: Polymers (article, 2026-01-31)
Field: Chemistry — Analytical Chemistry

Ciprofloxacin-Imprinted Polymers: Synthesis, Characterization, and Applications Ciprofloxacin, being a widely used antibiotic agent, has sparked growing interest in the field of molecularly imprinted polymers (MIP) for its selective recognition and removal. This review provides a comprehensive analysis of the recent advances in the synthesis and applications of ciprofloxacin-imprinted polymers. The examination of synthesis compositions for the preparation of these polymers includes thorough discussions on functional monomers, crosslinkers, initiators, and solid supports. Various imprinting techniques, including bulk, precipitation, co-precipitation, and surface polymerization, have been assessed for the fabrication of the imprinted polymers. Furthermore, the advancing imprinting techniques, encompassing nano-scale imprinting, multi-functional monomers, multi-template imprinting, and electrochemical imprinting, are also highlighted. Additionally, an extensive exploration of the diverse applications of these polymers is also presented. These applications encompass selective separation and removal of ciprofloxacin from environmental samples, visual and electrochemical detection in complex matrices, their use as a stationary phase for HPLC, drug release, and photocatalysis. This review offers valuable insights into the current advancements and potential future directions in the development of ciprofloxacin-imprinted polymers, emphasizing their importance in diverse analytical and environmental applications. Molecularly imprinted polymer ; Molecular imprinting ; Polymer ; Imprinting (psychology) Analytical chemistry methods development ; Pharmaceutical and Antibiotic Environmental Impacts ; Analytical Chemistry and Chromatography
Authors: Timo M. O. Felder | Nazanin Taheri | Till Schertenleib | Anne F. S. Belin | Pattaraphol Rodlamul | Laura Piveteau | Mounir Mensi | Xiaoxin Gao | Paul J. Dyson | Mohammad K. Nazeeruddin | Wendy L. Queen
Source: Small (article, 2026-01-25)
Field: Chemistry — Inorganic Chemistry

Efficient, Reversible Lead Adsorption in a Thiol‐Decorated Zirconium‐Metal–Organic Framework Metal-organic frameworks (MOFs) featuring high densities of selective metal binding sites represent promising materials for the extraction of toxic metal ions from liquids. This study presents a Zr-MOF containing accessible thiol functionalities that demonstrates exceptional adsorption capacity and recyclability for the capture of lead(II) ions (Pb(II)). Structural characterization via Pair Distribution Function (PDF) and Powder X-ray diffraction (PXRD) analyses revealed well-defined Zr-clusters interconnected via meso-2,3-dimercaptosuccinic acid (DMSA) linkers. The framework exhibits limited long-range structural order and high ligand flexibility that facilitates Pb(II) chelation. Sequential adsorption/desorption cycles monitored via X-ray Photoelectron Spectroscopy (XPS), solid-state NMR, and PDF established that: (i) strong chelation occurs between Pb(II) and DMSA through both thiol and carboxylate functionalities and (ii) this chelation is reversible under acidic conditions, enabling complete adsorbent regeneration. Beyond its high performance in lead removal from water, the practical utility of Zr-DMSA was further demonstrated through the removal of Pb(II) from damaged Pb-based perovskite solar cells, with efficacy confirmed at both ambient and elevated temperatures. These results highlight the potential of thiol-bearing Zr-MOFs as efficient, cyclable adsorbents for heavy metal remediation applications. Adsorption ; Chelation ; Carboxylate ; Thiol ; Metal ions in aqueous solution ; Ligand (biochemistry) ; X-ray photoelectron spectroscopy ; Metal Metal-Organic Frameworks: Synthesis and Applications ; Zeolite Catalysis and Synthesis ; Covalent Organic Framework Applications
Authors: Magdalena Blachnio | Malgorzata Zienkiewicz-Strzalka | Anna Derylo-Marczewska
Source: Materials (article, 2026-01-04)
Field: Materials Science — Materials Chemistry

Analysis of Physical Processes in Confined Pores of Activated Carbons with Uniform Porosity Mesoporous carbons based on silica hard templates were used to investigate physical processes in confined pores. Nitrogen adsorption, scanning electron microscopy, and scattered X-ray analyses revealed two classes of materials: carbons with moderate and highly developed mesoporosity. The pore structure was strongly dependent on pore expanders which proved essential for generating open, accessible architectures. All carbons exhibited a basic, graphitic surface (pH<sub>PZC</sub> = 8.4-10.9), enriched in electron-donating oxygen functionalities. Differential scanning calorimetry studies of confined water showed that melting point depression follows the Gibbs-Thomson relationship, confirming the strong dependence of phase transitions on pore size and water-surface interactions. Adsorption experiments using methylene blue demonstrated that capacity is governed by surface area, pore volume, and pore size distribution. For carbon with the largest average pore size, adsorption of various dyes revealed that uptake decreases with increasing molecular size, whereas affinity depends strongly on electrostatic interactions. Kinetic studies indicated that carbons with larger mesopores exhibit the fastest adsorption, and that large, complex dye molecules undergo significant diffusion limitations. Overall, the results show that the interplay between pore structure, adsorbate size, and surface chemistry influences both the equilibrium uptake and adsorption kinetics in mesoporous carbon materials. Mesoporous material ; Adsorption ; Differential scanning calorimetry ; Melting-point depression ; Porosity ; Diffusion ; Carbon fibers ; Molecule Mesoporous Materials and Catalysis ; Adsorption and biosorption for pollutant removal ; Adsorption, diffusion, and thermodynamic properties of materials
Authors: Hossein Molavi | Somayeh Saeedi | Ahmad Ghorbani
Source: Scientific Reports (article, 2026-02-27)
Field: Chemistry — Inorganic Chemistry

Green synthesis of amorphous Ce-MOFs as efficient adsorbents towards Ofloxacin antibiotics This study presents an efficient and green strategy for the synthesis of amorphous metal-organic frameworks (MOFs). Hence, we synthesized a series of cerium (Ce)-based amorphous MOFs at room temperature using water as the sole solvent via screening the undissolved organic ligands. XRD and ATR-FTIR analyses confirmed the highly amorphous nature and preserved chemical structure of the synthesized Ce-MOFs, while N2 adsorption/desorption and TGA results revealed mesoporosity and good thermal stability. The synthesized small-sized amorphous Ce-MOFs particles exhibited hierarchical pores in the range of 4–15 nm, moderate surface areas (up to 280 m2/g), large pore volumes (up to 0.54 cm3/g), abundant active adsorption sites, and good structural stability, which are all beneficial for the efficient removal of the Ofloxacin (OFL) antibiotic from water. Among different synthesized amorphous Ce-MOFs, the Ce-MOF-A-2 with a surface area of 152 m2/g showed a high affinity toward OFL molecules, resulting in the highest experimental adsorption capacity of 138.98 mg/g under optimal conditions (T = 298 K, t = 4 h, pH ≈ 8). The experimental adsorption data for this adsorbent followed the Langmuir isotherm and pseudo-second-order kinetic models, resulting in a maximum calculated adsorption capacity of 140.84 mg/g, higher than its crystalline counterpart. Additionally, this amorphous adsorbent showed satisfactory regeneration and reusability performances, making it an acceptable adsorbent for water decontamination. Adsorption ; Amorphous solid ; Langmuir adsorption model ; Specific surface area ; Amorphous silica ; Ofloxacin ; Solvent Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Covalent Organic Framework Applications
Authors: Tanusha Devi | Noorashikin Md Saleh | Farhanini binti Yusoff | Nur Hidayatul Nazirah
Source: Royal Society Open Science (article, 2026-01-21)
Field: Materials Science — Materials Chemistry

Magnetic Covalent Organic Frameworks (MCOFs): A Sustainable Solution for Emerging Organic Contaminants (EOCs) from the River Abstract The synthesis and characterization of effective magnetic covalent organic frameworks (MCOFs) are presented for the highly efficient adsorption of dimethyl phthalate (DMP), dibutyl phthalate (DBP) and bisphenol A (BPA) from the aqueous environment. The novelty of this research lies in the development of MCOFs through a coprecipitation method that incorporates an innovative silica inner shell. This crucial feature not only prevents aggregation of the magnetic core, which is a significant limitation of conventional adsorbents, but also enables robust interactions between the core and the outer covalent organic framework (COF). The synthesized MCOFs were comprehensively characterised using a variety of techniques. Fourier-transform infrared spectroscopy (FTIR) and vibrating sample magnetometry (VSM) analyses confirmed successful synthesis and strong magnetic properties, while field-emission scanning electron microscopy (FESEM) revealed the presence of spherical, porous structures with small granules. Energy-dispursive X-ray (EDX) spectrometry analysis further confirmed the successful synthesis, showing a material composition of 58.2% Fe, 33.4% O, 4.8% C, and 3.2% Si. Brunauer–Emmett–Teller (BET) analysis showed the MCOFs possess a high surface area of 128.1 m2 g–1 and a pore diameter of 16.8 nm, indicating abundant active sites for adsorption. Under optimal conditions (pH 7, 100 mg adsorbent dosage, and 25-minute contact time) the MCOFs exhibited exceptional adsorption performance, with removal efficiencies of 90.0% for DMP, 86.0% for DBP, and 92.0% for BPA. The kinetic study revealed that the adsorption mechanism follows the pseudo-second-order model, suggesting a significant chemisorption process. Crucially, in situ FTIR analysis provided spectroscopic validation that hydrogen bonding and π–π stacking are the predominant interactions between the MCOFs and the organic contaminants. The developed analytical method achieved low detection limits of 0.0058 mg l−1 for DMP, 0.0079 mg l−1 for DBP and 0.0063 mg l−1 for BPA, indicating high sensitivity for trace-level contaminant detection in real water samples. Furthermore, the adsorbent demonstrated exceptional reusability, maintaining high performance after 15 adsorption–desorption cycles, which is a significant improvement over conventional adsorbents. This study demonstrates that MCOFs with a silica inner shell are a highly promising, stable and sustainable solution for the removal of emerging organic contaminants (EOCs). Adsorption ; Coprecipitation ; Fourier transform infrared spectroscopy ; Chemisorption ; Aqueous solution ; Infrared spectroscopy ; Covalent bond ; Scanning electron microscope Covalent Organic Framework Applications ; Adsorption and biosorption for pollutant removal ; Advanced oxidation water treatment
Authors: Abdelhamid A. Sakr | Amr Hassan | Atef M. K. Nassar | Saeid M. Elkatlawy
Source: Journal of Porous Materials (article, 2026-03-07)
Field: Materials Science — Polymers and Plastics

A porous polyaniline-chitosan nanocomposite for efficient adsorption and detection of the pesticide Sumithion from water The environmental persistence of organophosphate pesticides necessitates the development of multifunctional materials capable of simultaneous remediation and monitoring. This study introduces a bifunctional polyaniline-chitosan (PANI-Ch) nanocomposite, synthesized via in-situ oxidative polymerization, designed for the high-capacity adsorption and quantitative optical detection of the pesticide Sumithion. The PANI-Ch platform exhibited an exceptional adsorption capacity of 124.7 mg/g, following a Langmuir-type monolayer process. Thermodynamic and spectroscopic analyses revealed a physisorption mechanism dominated by π–π stacking and hydrogen bonding, supported by a mean free energy (E) of 0.027 kJ/mol. Beyond remediation, the nanocomposite functions as a robust sensing tool; Sumithion adsorption induces precise, concentration-dependent FTIR spectral shifts in the O–H/N–H and C = C stretching regions. These optical changes allow for trace-level quantification with a Limit of Detection (LOD) of 0.5 ppb. By integrating high efficiency scavenging with built-in analytical signaling, this nanocomposite provides a versatile and advanced platform for integrated water treatment and real-time environmental monitoring. Adsorption ; Physisorption ; Nanocomposite ; Stacking ; Detection limit ; Bifunctional ; Environmental remediation ; Pesticide Conducting polymers and applications ; Adsorption and biosorption for pollutant removal ; Polymer-Based Agricultural Enhancements
Authors: Nafiseh Sheykhan | Majid Ghashang | Agata Szuławska-Mroczek
Source: RSC Advances (article, 2026-01-01)
Field: Materials Science — Biomaterials

Synthesis and functionalization of a Chitosan-PEI-Metallothionein biopolymer with enhanced mechanical and adsorptive properties for heavy metal removal A novel biofunctionalized polymeric adsorbent, Chitosan-Polyethyleneimine-Metallothionein-like Proteins (Chitosan-PEI-MTLPs), was synthesized through a controlled multi-step grafting and immobilization strategy. Surface modification ; Biopolymer ; Grafting ; Adsorption ; Metal ; Polymer Nanocomposite Films for Food Packaging ; Adsorption and biosorption for pollutant removal ; Collagen: Extraction and Characterization
Authors: Yue Yan | Anil Misra | Paulette Spencer | Viraj Singh | R. Parthasarathy
Source: Preprints.org (preprint, 2026-01-23)
Field: Materials Science — Biomaterials

Unifying Environmental Stress Cracking and Mechano-Sorptive Creep Under the Umbrella of Mechano-Sorptive Phenomena Mechano-sorptive phenomena (MSP) refer to the coupled mechanical response of polymers under simultaneous mechanical stress and fluid sorption. The most researched MSP are environmental stress cracking (ESC) and mechano-sorptive creep (MSC). ESC initiates at regions of localized stress and solvent sorption, presenting as brittle fracture, while MSC is characterized by large, time-dependent, and partially recoverable creep associated with transient bulk sorption. ESC experiments can however also result in significant plastic deformation, in which case the term environmental stress yielding (ESY) has been used. Similarly, MSC can evolve into tertiary creep followed by rupture, in which case the phenomenon is termed mechano-sorptive creep rupture (MSCR). Both behaviors originate from solvent diffusion into the amorphous phase leading to disruption of non-covalent interactions between polymer chains. This review bridges seemingly disconnected research to illustrate that ESC and MSC represent extremes on a continuum of MSP, rather than disparate phenomena. We identify the principles of polymer thermodynamics and experimental methods necessary to separate polymer deformation under MSC into reversible stress-induced swelling and irreversible non-equilibrium deformation. We propose that a better understanding of these phenomena is necessary for a variety of applications including biomimetic materials that mimic the mechanical adaptability of marine organisms. Creep ; Environmental stress cracking ; Brittleness ; Stress (linguistics) ; Polymer ; Cracking ; Viscoelasticity Calcium Carbonate Crystallization and Inhibition ; Polymer crystallization and properties ; Marine Biology and Environmental Chemistry
Authors: Muhammad Tahir Amin | Abdulrahman Ali Alazba | Muhammad Shafiq | Aftab Ahmad Khan | Muhammad Muhitur Rahman
Source: Soil and Water Research (article, 2026-01-20)
Field: Materials Science — Materials Chemistry

Ca-Mg-Al LDH-modified wheat straw biochar for efficient lead chemisorption from aqueous solution: Insights from isotherm and kinetic analyses This study reports layered double hydroxides (LDHs) modified wheat straw biochar (W-B), denoted as (LDH/W-B), asan efficient adsorbent material for removal oflead (Pb<sup>2+</sup>) ions from aqueous solution. This study also juxtaposes the adsorptive performance ofLDH/W-B with W-B for Pb<sup>2+</sup> removal. W-B was prepared via pyrolysis ofwheat straw inamuffle furnace, using acontrolled heating rate of5C per min toreach 600C over aduration ofthree hours. Subsequently, LDH/W-B was synthesised using the co-precipitation method. Both resulting adsorbents were characterised for surface morphology and functional groups bymeans ofscanning electron microscope (SEM) and Fourier transform infrared (FTIR), respectively. The influence ofkey adsorption parameters onthe adsorption efficiency ofW-B and LDH/W-B was systematically evaluated. At60min, the maximum Pb<sup>2+</sup> removal efficiency was observed tobe 78.21% for W-B and 92.4% for LDH/W-B. Anincrease inadsorbent dosage from 0.05 to0.7g and atacontact time of1h further enhanced Pb<sup>2+</sup> removal, achieving efficiencies of97% for W-B and 99% for LDH/W-B. The optimal conditions for maximum Pb<sup>2+</sup> removal were determined tobe 0.3g ofadsorbent (W-B and LDH/W-B), aninitial heavy metal concentration of10mg/L, and acontact time of1h. Pb<sup>2+</sup> removal data ofW-B and LDH/W-B best fitted tothe Langmuir isotherm and pseudo-second order kinetic model, which confirmed the dominance ofchemisorption ofPb<sup>2+</sup> ions. Additionally, the maximum theoretical adsorption capacity for Pb<sup>2+</sup> isclose tothe experimentally obtained values, suggesting that the adsorption ofPb<sup>2+</sup> primarily occurs through monolayer formation onthe surface ofboth adsorbents. Overall, this study demonstrates that LDH/W-B isahighly promising adsorbent for Pb<sup>2+</sup> removal in wastewater treatment applications. Biochar ; Adsorption ; Aqueous solution ; Langmuir adsorption model ; Pyrolysis ; Fourier transform infrared spectroscopy ; Chemisorption ; Straw ; Wastewater Layered Double Hydroxides Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Fluoride Effects and Removal
Authors: Laxmi Adhikari | Srushti Pansare | Rakesh R. Mudireddy | MONISHA GOWRI SRINIVASAN | Timothy V. Duncan
Source: npj Science of Food (article, 2026-01-13)
Field: Materials Science — Materials Chemistry

Milk proteins and fat influence Ag migration from model dairy packaging containing silver nanoparticles We investigated migration of Ag from model Ag nanoparticle (AgNP)-loaded polyethylene films into bovine milks with varying milkfat content after storage for 10 days at 20 °C. Ag migration into 2% fat milk (2.18 ± 0.03 ng/cm<sup>2</sup>) was comparable to that observed in skim milk (2.16 ± 0.14 ng/cm²), while whole milk (4% milkfat) had the lowest migration (1.80 ± 0.07 ng/cm²). Notably, Ag migration into skim, 2%, and whole milk was 1.72, 1.69, and 1.40 times higher, respectively, than that into 50% aqueous ethanol, a common simulant for whole milk. At least a portion of the migrated Ag in milk existed as nanoparticles, suggesting that milk components influence the final form of migrated Ag. We explored the behavior of Ag<sup>+</sup> ions in milks and observed efficient Ag<sup>+</sup> transformation to Ag<sup>0</sup> NPs and Ag<sub>2</sub>O NPs. Electron microscopy images revealed polydisperse, quasi-spherical Ag particles with sizes ranging from 5 to 70 nm. Milk proteins, particularly casein and whey, play a role in the transformation of dissolved Ag<sup>+</sup> to nanoparticles, while lactose influences the nanoparticle composition. These findings highlight that Ag interactions with milk components affect Ag migration dynamics and emphasize the need for a better delineation of appropriate food simulants for migration studies with AgNP-containing polymers. Lactose ; Silver nanoparticle ; Casein ; Butterfat ; Skimmed milk ; Milk fat ; Nanoparticle ; Aqueous solution Nanoparticles: synthesis and applications ; Proteins in Food Systems ; Nanocomposite Films for Food Packaging