jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Arun K. Das | Hitesh Saravaia
Source: Analytical Methods (article, 2025-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Magnesium-doped lithium manganese oxide composite with mesoporous silica for methylene blue dye and heavy metal removal In this study, magnesium-doped lithium manganese oxide nanoparticles were prepared through a solid-state reaction technique, and their surface was modified with mesoporous silica. The surface-modified material exhibited a significantly enhanced BET surface area from 5.791 to 66.058 m<sup>2</sup> g<sup>-1</sup>, thus enhancing the adsorption property. The prepared material was characterized using advanced analytical techniques such as powder XRD (PXRD), FT-IR, BET surface area analysis, and scanning electron microscopy (SEM). The effect of the adsorbent dosage, contact time, pH, and initial concentration on adsorption characteristics was evaluated for methylene blue (MB) dye. A maximum adsorption capacity of 94.34 mg g<sup>-1</sup> was obtained from the Langmuir adsorption isotherm. Kinetic properties were characterized using the pseudo-first-order, pseudo-second-order, and intra-particle diffusion models, and the pseudo-second-order model was found to be the best fit. Effectively, four cycles of adsorption-desorption for the prepared material were demonstrated through thermal desorption technique. To understand the feasibility of adsorption in different matrix conditions, MB dye-spiked samples of well water, lake water, and tap water were treated with the adsorbent material and 64.5%, 62.8%, and 53.5% removal performance, respectively, was observed. In addition, mixed solutions of heavy metals (Co<sup>2+</sup>, Ni<sup>2+</sup>, Cu<sup>2+</sup>, Zn<sup>2+</sup>, and Pb<sup>2+</sup>) were also tested for adsorption performance study of the adsorbent and 65.5-99.7% removal was observed at a sample dose of 25 g L<sup>-1</sup>. Methylene blue ; Mesoporous silica ; Magnesium ; Lithium (medication) ; Mesoporous material ; Manganese ; Inorganic chemistry ; Doping ; Metal ; Composite number ; Nanoparticle ; Materials science ; Oxide ; Nuclear chemistry ; Chemistry ; Catalysis ; Nanotechnology ; Organic chemistry ; Metallurgy ; Composite material Supercapacitor Materials and Fabrication ; Advancements in Battery Materials ; Extraction and Separation Processes
Authors: Akihisa Miyagawa | Shinya Watanabe | Mutsuo Igarashi | Shigenori Nagatomo | Kiyoharu Nakatani
Source: Langmuir (article, 2025-02-04)
Field: Chemistry — Spectroscopy

Intraparticle Diffusion Behavior of Rhodamine 6G in Single Silica Particle Revealed by Fluorescence Correlation Spectroscopy Understanding the intraparticle diffusion mechanism within single particles is crucial for processes such as chromatographic separation, drug delivery, and solid extraction. However, when the time required to reach distribution equilibrium is extremely short (on the order of several seconds), conventional kinetic detection methods pose significant challenges in observing intraparticle diffusion behavior. In this study, we employed fluorescence correlation spectroscopy (FCS)─a technique capable of detecting diffusion behavior at equilibrium─to investigate the intraparticle diffusion of rhodamine 6G (Rh6G) within single porous silica particles of varying pore sizes. The autocorrelation coefficients of Rh6G were fitted using two-component analysis, revealing faster and slower diffusion components associated with the pore diffusion, without and with adsorption/desorption, respectively-behaviors that were not observed by the kinetic method described by our previous study. Further analysis of the slower diffusion component was conducted using pore and surface diffusion models. Our findings indicate that pore diffusion is the primary diffusion mechanism for Rh6G within silica particles. Thus, we demonstrated that the intraparticle diffusion mechanism of Rh6G in silica particles can be elucidated using FCS measurements. Rhodamine 6G ; Diffusion ; Fluorescence correlation spectroscopy ; Chemistry ; Particle (ecology) ; Analytical Chemistry (journal) ; Effective diffusion coefficient ; Desorption ; Chemical physics ; Adsorption ; Materials science ; Chromatography ; Thermodynamics ; Physical chemistry ; Organic chemistry Diffusion Coefficients in Liquids ; Electrochemical Analysis and Applications ; Spectroscopy and Quantum Chemical Studies
Authors: Massimo Giuseppe De Cesaris | María J. Trujillo‐Rodríguez | Jorge Pasán | Alessandra Gentili | Verónica Pino
Source: Advances in Sample Preparation (article, 2025-01-18)
Field: Chemistry — Analytical Chemistry

Mixed matrix membranes based on cellulose acetate recycled from cigarette butts and metal-organic frameworks for thin film solid-phase microextraction: Determination of phenols in environmental waters • Cellulose acetate is recycled from cigarette filters and reused as sorbent material. • Membranes of recycled cellulose acetate and metal-organic frameworks are reported. • The membranes based on MIL-101( Fe ) are effective for the microextraction of 14 phenols. • Kinetic studies indicate that chloro- and alkyl-phenols are adsorbed faster than bisphenols. • The optimized method is simple, sustainable, and useful for monitoring phenols in waters. The recovery of raw materials from waste is a viable strategy to transition to more circular and greener methodologies. In this study, cigarette filters were recycled to obtain cellulose acetate and re-used as a support for a sorbent material in a microextraction procedure. Thus, this biosorbent was combined with a metal-organic framework (MIL-101( Fe )) and configurated in a membrane format of 300 µm of thickness via solvent casting. The developed mixed matrix membranes were characterized by Fourier-transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and energy dispersion X-ray. Kinetic adsorption studies for a group of 14 phenols (chlorophenols, alkylphenols, and bisphenols) present in waters and partitioning to the membrane systems were performed to gain insights into the extraction mechanisms of the membranes. The kinetics were fitted to pseudo-first order and interparticle diffusion models, with data indicating that chloro‑ and alkyl-phenols were adsorbed faster than bisphenols. Besides, the resulting membranes were utilized in thin film solid-phase microextraction (TF-SPME) in combination with high-performance liquid chromatography (HPLC) with diode array detection (DAD) and fluorescent detector (FLD). The optimized method using these mixed matrix membranes (with dish shape and 1 cm of diameter) required 60 min of extraction with agitation followed by 10 min of desorption in 500 µL of basic ethanol. Low limits of detection, down to 2.13 µg·L -1 , were achieved, together with good performance in SPMS and BAGI metrics, with scores of 5.89 and 62.5, respectively. The performance with river waters was accompanied by adequate relative recoveries (74.3–117 %), reproducibility (with inter-day RSD values lower than 18 %), and absolute recoveries (up to 59 %). Solid-phase microextraction ; Cellulose ; Matrix (chemical analysis) ; Membrane ; Phenols ; Cellulose acetate ; Materials science ; Chromatography ; Chemistry ; Chemical engineering ; Environmental chemistry ; Organic chemistry ; Gas chromatography–mass spectrometry ; Mass spectrometry Analytical chemistry methods development ; Advanced Chemical Sensor Technologies ; Gas Sensing Nanomaterials and Sensors
Authors: Jiyue Ding | Xiaoyu Liu | Ning Zhang | Yi Wang | Cui Ke | Huachi Yu | Jingyi Chen | Qingyang Xu | Gao Jian-yang | Huaizhi Shao | Zilin Meng
Source: Journal of Environmental Management (article, 2025-09-12)
Field: Materials Science — Materials Chemistry

Comparative study of different organic and inorganic sulfide intercalated layered double hydroxides to remove Cu(Ⅱ) and Pb(Ⅱ) from aqueous solutions Sorption ; Layered double hydroxides ; Aqueous solution ; Langmuir ; Freundlich equation ; Adsorption ; Sulfide ; Monolayer Layered Double Hydroxides Synthesis and Applications ; Adsorption and biosorption for pollutant removal
Authors: Christine Seidl | Bonan Zhao | Xinliu Gao | Rüdiger Berger | Lin Jian | Kaloian Koynov | Meike Gangluff | Rivka Fontijn | Lu Su | Jeroen Bussmann | Heyang Zhang | Matthias Barz
Source: ACS Applied Materials & Interfaces (article, 2025-10-02)
Field: Materials Science — Surfaces, Coatings and Films

Polypept(o)ide Based Biodegradable Cylindrical Polymer Brushes: Controlling Size, Shape, Surface Functionality, and Stability Cylindrical polymer brushes (CPBs) enable remarkable control over nanoparticle properties solely through sequential polymerization. The spatial dimensions and functionality of the resulting polymeric nanoparticles can be adjusted by the ratio of backbone to side chain length and the chemical nature of both parts. In this work, we present a convenient and straightforward synthetic pathway to polypept(o)ide-based CPBs using a "grafting-from" strategy utilizing poly-l-lysine (pLys) as the macroinitiator backbone and polysarcosine (pSar) as the side chain. End-capping of pSar chains with azido-butyric acid pentafluorophenyl ester enables facile surface functionalization by click chemistry (e.g., dye labeling). This strategy allows for straightforward control over nanoparticle size (<i>R</i><sub>h</sub> from 12 to 41 nm), shape (aspect ratio from 1.7 to 8.3), and molecular weights (from 350 to 2980 kg mol<sup>-1</sup>). Despite the high grafting density of pSar side chains from the pLys backbone (>85%), enzymatic degradation is feasible by the natural protease B from<i>Streptomyces griseus</i>and enables the analysis of pSar side chains upon cleavage (<i>Đ</i> = 1.03-1.04). Interestingly, these CPBs exhibit thermal stability in phosphate-buffered saline at elevated temperatures (60 °C for 24 h) and display notable circulation in zebrafish embryos (up to 3 days). Therefore, CPBs based on polypept(o)ides not only allow for precise tuning of size, shape, and surface functionality but also display high biocompatibility and extended circulation time in zebrafish, leveraging the stealth-like properties of pSar. Side chain ; Polymer ; Nanoparticle ; Surface modification ; Degradation (telecommunications) ; Thermal stability ; Biocompatibility ; Cleavage (geology) Polymer Surface Interaction Studies ; Nanofabrication and Lithography Techniques ; Advanced Polymer Synthesis and Characterization
Authors: Zhensong Qiu | Jiyu Cui | Dengzhuo Zhou | Zhenglu Yang | Xiaofei Lü | Xian Suo | Anyun Zhang | Xili Cui | Lifeng Yang | Huabin Xing
Source: Industrial Chemistry and Materials (article, 2025-01-01)
Field: Chemistry — Inorganic Chemistry

Efficient stacking of iso-butene in sulfonate functional metal–organic frameworks for efficient iso-butene/iso-butane separation Efficient stacking of the target molecule within confined pore space realizes the preferential adsorption of the target molecule in adsorption separation. 1-Butene ; Butane ; Butene ; Stacking ; Metal-organic framework ; 2-Butene ; Sulfonate ; Materials science ; Chemistry ; Organic chemistry ; Catalysis ; Ethylene ; Sodium Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications ; Membrane Separation and Gas Transport
Authors: Marlene E. Hoefnagel | Dennis G. H. Hetterscheid
Source: ChemSusChem (review, 2025-04-24)
Field: Chemistry — Inorganic Chemistry

The Role of Metal–Organic Framework Induced Confinement Effects on Molecular Electrocatalysts Relevant to the Energy Transition Metal organic frameworks (MOFs) are promising materials for (electro)catalysis as they can improve stability, reusability, and catalytic current densities of molecular catalysts, thereby combining the advantages of homogeneous- and heterogeneous catalysts. However, much is unknown about the effects of confinement of a catalyst within an MOF on the overall catalytic behavior. The performance of a series of electrocatalysts confined in MOFs is compared to that of the corresponding homogeneous catalysts to evaluate to what extend the catalytic site is affected by confinement in terms of stability, activity, and selectivity. Together the examples discuss depict what happens to a catalyst when it is incorporated into an MOF, and recommendations are made on how to evaluate the electrochemical activity of an MOF in a way that allows for description of such confinement effects on the catalyst performance. It is noted that the limiting factor for the catalytic reaction in MOFs is found in 1) slow electron transport, 2) slow mass transport of reactants and products, or 3) a low activity of the catalytic site itself. Understanding the changes in mass- and electron transport and the resulting effects on catalytic mechanism is essential to be able to bring MOF systems to practical applications. Catalysis ; Reusability ; Transition metal ; Nanotechnology ; Metal-organic framework ; Chemistry ; Homogeneous ; Electrochemistry ; Heterogeneous catalysis ; Chemical physics ; Limiting ; Selectivity ; Mass transport ; Materials science ; Chemical engineering ; Combinatorial chemistry ; Physical chemistry ; Organic chemistry ; Electrode ; Thermodynamics ; Physics ; Computer science ; Engineering physics Metal-Organic Frameworks: Synthesis and Applications ; Electrocatalysts for Energy Conversion ; Advanced battery technologies research
Authors: Felipe Pereira da Silva | Leandro C. Felippe | Cristiano Piacsek Borges | Annelise Casellato | Fabiana Valéria da Fonseca
Source: Processes (article, 2025-02-07)
Field: Chemistry — Organic Chemistry

Enhanced Removal of Organic Compounds Assisted by Activated Carbon/Copper (II) Complex Composite Industrial wastewater treatment is essential to mitigate pollution and address global water scarcity. In this study, an activated carbon/copper (II) complex (AC/CuL) composite was obtained for enhanced removal of organic compounds by coupling adsorption and oxidation. Tests were performed using Drimaren Red X-6BN (DRX-6BN) and oily effluent at pH~6.0. Tests to obtain the adsorption kinetics of DRX-6BN (20 mg/L) were performed at 25 °C and using an amount of 0.42 g/200 mL of solution. The data were well fitted by several models, suggesting a complex adsorption process; however, the best fit was achieved by the pseudo-second-order (PSO) model (R2 = 0.9996). The adsorption data best fit the Freundlich model. The addition of hydrogen peroxide to the system reduced the need for adsorbent, removing approximately 100% of the chemical oxygen demand (COD) from the emulsion in 120 min using only 0.04 g of AC/CuL. The material exhibited high storage stability and maintained its effectiveness in removing oil and grease (O&amp;G) content and COD for at least 12 months. These results indicate that AC/CuL is promising for the removal of complex organic compounds, such as that from the textile and petroleum industries. These findings offer a sustainable, economical, and safe approach for wastewater treatment. Copper ; Composite number ; Activated carbon ; Carbon fibers ; Chemistry ; Chemical engineering ; Environmental chemistry ; Materials science ; Adsorption ; Organic chemistry ; Composite material ; Engineering Nanomaterials for catalytic reactions ; Catalytic Processes in Materials Science ; Adsorption and biosorption for pollutant removal
Authors: N. Zhou | Xueli Wu | Shaoxia Wang | Jianfei Qu | Yang Tan | Chuanlei Luan | Xiuli Yin | Xuran Wu | Xuming Zhuang
Source: Molecules (article, 2025-04-18)
Field: Chemistry — Inorganic Chemistry

Amino-Modified ZIF-90 for Effective Adsorption of Au(III) in Environmental Water In this work, amino-modified ZIF-90 (NH<sub>2</sub>-ZIF-90) was prepared by using butylamine as a modifier, and its effectiveness in adsorbing Au(III) from environmental samples was investigated. The morphology and structure of NH<sub>2</sub>-ZIF-90 were analyzed via SEM, XRD, FT-IR, and XPS. Optimal adsorption occurred after 12 h of shaking in a pH = 5 aqueous solution with 2 mg mL<sup>-1</sup> NH<sub>2</sub>-ZIF-90. The adsorption kinetics conformed to a pseudo-second-order model, and the equilibrium data fit the Freundlich isotherm model well. Finally, NH<sub>2</sub>-ZIF-90 was successfully used in lake water and tap water samples for Au(III) adsorption, with recovery rates ranging from 81.0% to 93.3%. This study presents a novel approach for addressing Au(III) adsorption challenges. Adsorption ; Freundlich equation ; Aqueous solution ; Chemistry ; X-ray photoelectron spectroscopy ; Kinetics ; Tap water ; Nuclear chemistry ; Chemical engineering ; Organic chemistry ; Environmental engineering ; Environmental science Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Arsenic contamination and mitigation
Authors: Haibo Zhang | Yafu Wang | Yun Shi | Yiyi Zhang | Yihang Yang | Yuexin Wang | Yue Cui | Junyan Guo | Pan Zhang | Lin Sun | Jiangwei Zhang
Source: Nano Research (article, 2025-07-02)
Field: Materials Science — Materials Chemistry

Recent advances in polyoxometalate-based proton conducting materials: Design strategies, conduction mechanisms, structure–function relationships and future perspectives In recent years, the depletion risk of fossil fuels has driven increasing interest in renewable energy. Among various technologies, Proton Exchange Membrane Fuel Cells (PEMFCs) stand out due to their fast startup and high power density. However, the commonly used Nafion membranes suffer from reduced proton conductivity under low humidity and high temperatures, limiting their practical application. Polyoxometalates (POMs), with their excellent proton conductivity and thermal stability, have emerged as promising alternatives. Yet, their high water solubility raises safety concerns, and their water-dependent conduction mechanisms and structure-function relationships remain insufficiently understood. These issues hinder the practical development of POM-based proton conductors. This paper presents a comprehensive review of the key properties and proton conduction mechanisms of POMs, with a particular focus on POM crystals and their composites exhibiting high proton conductivity. Representative studies are analyzed to elucidate design strategies, structure-function relationships, and recent research progress over the past five years. Finally, perspectives and recommendations are proposed to inform future research directions and promote practical applications in the field of proton-conducting materials. Polyoxometalate ; Nanotechnology ; Function (biology) ; Proton ; Materials science ; Structure function ; Chemical physics ; Chemistry ; Physics ; Catalysis ; Organic chemistry ; Quantum mechanics Polyoxometalates: Synthesis and Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications
Authors: S. Hema | D. A. Anagha | S. Gayathri | Sruthi R. Krishna | Sreedeep G. Krishnan | Radhika Sreenath | Sreedha Sambhudevan
Source: Journal of Applied Polymer Science (article, 2025-01-17)
Field: Materials Science — Materials Chemistry

Investigation of Organic Solvent Transport in <scp>NR</scp>‐<scp>NBR</scp> Blends Reinforced With Ferrite Nanoparticles: A Comprehensive Study ABSTRACT This research examines the transport of three commonly used laboratory solvents (hexane, toluene, and ethanol) with varying solubility parameters through a polymer blend nanocomposite membrane prepared by two‐roll milling. The primary objective was to evaluate how incorporating magnetically active ferrite influences the transport behavior of these solvents in natural rubber‐nitrile rubber (NR‐NBR) blends to enhance chemical resistance and control diffusion. The study revealed that ferrite reduced solvent absorption, diffusion, sorption, and permeation constants at lower loadings, with solubility differences significantly impacting transport properties. Morphological analysis confirmed that fillers reduced swelling coefficients by blocking solvent diffusion channels and improving reinforcement at lower loadings, as validated by cross‐link density. The influence of blend ratio, solvent molecule size, and ferrite content on aromatic and aliphatic solvent diffusion was analyzed, and the data supported the development of mathematical models to predict diffusion behavior and understand transport mechanisms. Nanoparticle ; Chemical engineering ; Solvent ; Materials science ; Organic solvent ; Ferrite (magnet) ; Chemistry ; Polymer chemistry ; Composite material ; Organic chemistry ; Nanotechnology ; Engineering Graphite, nuclear technology, radiation studies ; Fiber-reinforced polymer composites ; Polymer Nanocomposites and Properties
Authors: Tarab Fatima | Manika Khanuja
Source: Advanced Sustainable Systems (article, 2025-04-21)
Field: Materials Science — Materials Chemistry

Nature Inspired Biomimetic‐Chlorophyll‐Carbon Dot Decorated WS<sub>2</sub>/MIL‐53(Fe) Nanocomposite for the Photocatalytic Degradation of Pharmaceutical Drugs Abstract In this study, an approach is used to emulate the principles of nature‐inspired engineering for the photodegradation of antibiotics. A bioinspired photocatalyst of Chlorophyll‐Carbon dots (Chl‐CDs) decorated WS 2 /MIL‐53(Fe) nanocomposite was synthesized via a facile hydrothermal method. The nanocomposite showed significantly enhanced visible light absorption due to the presence of Chl‐CDs dots with excitation‐dependent emission behavior, attributed to distinct surface states and functional groups. The average lifetime of photogenerated electron‐hole pairs increased by ∼6 times compared to pure WS 2 which is responsible for more efficient charge separation. Furthermore, the surface area of the nanocomposite was found to be 16 times higher than WS 2 , providing abundant active sites for the photocatalytic reaction. The photocatalytic performance was evaluated through the degradation of Sulfamethoxazole (SMX) and Sulfasalazine (SZ), with the Chl‐CDs/WS 2 /MIL‐53(Fe) nanocomposite achieving 90–100% degradation of SZ and SMX in 90 minutes. Electron‐Paramagnetic‐Resonance spectroscopy (EPR) confirmed the involvement of reactive oxygen species (ROS), while the degradation pathway was elucidated using Liquid Chromatography‐Mass Spectroscopy (LCMS). The improved performance can be attributed to the enhanced charge separation, increased surface area, and the Z‐scheme mechanism. This study represents the promising potential of the novel ternary Chl‐CDs/WS 2 /MIL‐53(Fe) nanocomposite for efficient photocatalytic removal of organic pollutants from water. Nanocomposite ; Degradation (telecommunications) ; Photocatalysis ; Materials science ; Chemical engineering ; Carbon fibers ; Nanotechnology ; Nanoparticle ; Carbon Nanoparticles ; Chemistry ; Composite material ; Organic chemistry ; Composite number ; Catalysis Advanced Nanomaterials in Catalysis ; Advanced Photocatalysis Techniques ; Carbon and Quantum Dots Applications