jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Nor Hasmaliana Abdul Manas | Nurhidayah Kumar Muhammad Firdaus Kumar | Nurul Aqilah Mohd Shah | Guang Yik Ling | Nur Izyan Wan Azelee | Siti Fatimah Zaharah Mohd Fuzi | Nasratun Masngut | Muhammad Abd Hadi Bunyamin | Rosli Md. Illias | Hesham Ali El Enshasy
Source: Sustainability (article, 2023-01-13)
Field: Materials Science — Biomaterials

Adsorption of Fatty Acid on Beta-Cyclodextrin Functionalized Cellulose Nanofiber Fatty acids in wastewater contribute to high chemical oxygen demand. The use of cellulose nanofiber (CNF) to adsorb the fatty acids is limited by its strong internal hydrogen bonding. This study aims to functionalize CNF with β-cyclodextrin (β-CD) and elucidate the adsorption behaviour which is yet to be explored. β-CD functionalized CNF (CNF/β-CD) was achieved by crosslinking of β-CD and citric acid. Functionalization using 7% (w/v) β-CD and 8% (w/v) citric acid enhanced mechanical properties by increasing its thermal decomposition. CNF/β-CD was more efficient in removing palmitic acid, showcased by double adsorption capacity of CNF/β-CD (33.14% removal) compared to CNF (15.62% removal). CNF/β-CD maintained its adsorption performance after five cycles compared to CNF, which reduced significantly after two cycles. At 25 °C, the adsorption reached equilibrium after 60 min, following a pseudo-second-order kinetic model. The intraparticle diffusion model suggested chemical adsorption and intraparticle interaction as the controlling steps in the adsorption process. The maximum adsorption capacity was 8349.23 mg g−1 and 10485.38 mg g−1 according to the Sips and Langmuir isotherm model, respectively. The adsorption was described as monolayer and endothermic, and it involved both a physisorption and chemisorption process. This is the first study to describe the adsorption behaviour of palmitic acid onto CNF/β-CD. Adsorption ; Chemistry ; Cellulose ; Physisorption ; Langmuir adsorption model ; Palmitic acid ; Citric acid ; Endothermic process ; Chemisorption ; Monolayer ; Chemical engineering ; Organic chemistry ; Inorganic chemistry ; Fatty acid ; Biochemistry Advanced Cellulose Research Studies ; Electrospun Nanofibers in Biomedical Applications ; Surface Modification and Superhydrophobicity
Authors: Parminder Kaur | Khadim Hussain | Atul Kumar | Janpreet Singh | Jisha Babu | Sandeep Kumar
Source: Environmental Nanotechnology Monitoring & Management (article, 2023-08-30)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Evaluation of synergistic adsorption approach for terbinafine removal by cotton shell powder immobilized zerovalent copper: Adsorption kinetics and DFT simulation Adsorption ; Freundlich equation ; Chemistry ; Zerovalent iron ; Copper ; Sorption ; Diffusion ; Physisorption ; Langmuir ; Nuclear chemistry ; Langmuir adsorption model ; Organic chemistry ; Thermodynamics Gold and Silver Nanoparticles Synthesis and Applications ; Nanomaterials for catalytic reactions ; Nanoparticles: synthesis and applications
Authors: Ahmed A. Mohammed | Ekehwanh Abd Al-majeed Rasheed | Luma Abd Al-majeed Rasheed | Firas R Abdulrahim
Source: Journal of Ecological Engineering (article, 2023-12-30)
Field: Chemistry — Organic Chemistry

Decolorization of Cationic Dye from Aqueous Solution by Multiwalled Carbon Nanotubes Methylene blue is a synthetic and cationic dye that finds utility in different fields including pharmaceutical, paper, textile, printing, carpet, and photography industry. Adsorption is a very effective technique to decolorize contaminated wastewater. This study aimed to determine the efficacy of Multiwalled Carbon Nanotubes (MWCNTs) as an adsorbent for decolorization of MB dye from aqueous solutions. The study has examined various characteristics affecting adsorption, including concentration of dye, pH value, dosage of MWCNTs, and contact time. Show results that growing the adsorbent dosage from (25 to 120) mg increased the dye efficiency rate from 62% to 98%, respectively. The study also evaluated pH, which is among the most critical factors influencing removal efficiency. The best pH for the removal efficiency was 6 at an initial concentration of MB dye 20 mgL-1, a contact time 60 min, and an MWCNT dosage 100 mg. To describe the adsorption equilibrium using Langmuir, Freundlich, and Temkin isotherms. The Langmuir isotherm with an R2 value of 0.9968 and a maximum capacity for adsorption of 19.6 mgg-1 provided a suitable fit for the data of experimental. In comparison between the suitability of kinetic models pseudo-first-order, pseudo-second order, and Weber–Morris, the kinetics model's correlation value was shown to be greater around the pseudo-second order kinetic model with an R2 value of 0.9982. Cationic polymerization ; Aqueous solution ; Carbon nanotube ; Chemical engineering ; Materials science ; Chemistry ; Nanotechnology ; Polymer chemistry ; Organic chemistry Nanomaterials for catalytic reactions ; Water Quality Monitoring and Analysis ; Synthesis of Tetrazole Derivatives
Authors: Quentin-Arthur Poutrel | Ianis Retailleau | Ugo Lafont | Olivier Damiano | François Tournilhac
Source: ACS Applied Polymer Materials (article, 2023-07-13)
Field: Materials Science — Polymers and Plastics

Thermolatent Heterogeneous Epoxy–Acid Formulation for the Manufacture of Preimpregnated Sheets and Composites with Vitrimer Properties The goal of this work is to develop carbon fiber-reinforced polymer (CFRP) composites showing vitrimer properties and manufacturable by the prepreg technique. Since their invention in 2011, epoxy vitrimer matrices have shown an appealing potential to produce CFRPs with healing, adhesion, and recycling abilities. While techniques such as resin infusion or resin transfer molding have been successfully applied, production of composites by handling of preimpregnated sheets requires a specific set of properties which is still lacking. Starting from commercially available monomers, we hereby investigate the design and preparation of a thermolatent reactive composition compliant with the prepreg technique. The designed composition is heterogeneous, comprising a crystalline hardener dispersed in novolac-based epoxy resin. It thus offers (i) latency and the required viscosity profile for impregnation of carbon fibers around 100 °C, (ii) chemical inertness and tackiness for storage and handling at room temperature, and (iii) awakened reactivity for curing at higher temperatures (>130 °C). The whole CFRP composite manufacture (from resin mixing, impregnation, and composite curing) was transferred from the laboratory to an industrial environment. The resulting CFRP vitrimer composites are investigated with regard to their mechanical properties, interfacial welding, damage healing, and reprocessing through chemical depolymerization, allowing the recovery of carbon fiber sheets with limited damage. Epoxy ; Materials science ; Composite material ; Curing (chemistry) ; Transfer molding ; Composite number ; Advanced composite materials ; Molding (decorative) ; Polymer ; Mold Polymer composites and self-healing ; Epoxy Resin Curing Processes ; Photopolymerization techniques and applications
Authors: Khuloud A. Alibrahim
Source: Journal of Molecular Recognition (article, 2023-04-12)
Field: Chemistry — Organic Chemistry

Enhanced adsorption of ceftriaxone antibiotics from water by activated carbon derived from agriculture products waste The present work determines efficiency of domestic food waste like tea waste in removing pharmaceutical waste such as ceftriaxone (CEF) from synthetic wastewater. Carbonaceous material; Tea waste activated carbon (TAC) has been employed and it showed high removal capacity of 787.5 mg/g. TAC was characterized using; XPS, XRD, SEM, FT-IR, and BET as well as it approved that the adsorbent a has high surface area of .6 m<sup>2</sup> /g. Various experimental parameters are evaluated for the removal efficiency of the synthesized adsorbent under the present study. During the adsorption study through batch experiments, it approved that the adsorption isotherm was fitted to Langmuir, while kinetically fitted to pseudo-second-order; the adsorption process was chemisorption process as the adsorption energy was 23.7 kJ mol<sup>-1</sup> . From evaluation thermodynamic parameters the adsorption reaction was endothermic and spontaneous reaction. The different real samples spiked with CEF and studies the efficiency of TAC to remove it. On the other hand, investigated the regeneration efficiency of the TAC and exhibit high regeneration efficiency as it will be used after four cycles with good efficiency of about 84.2%. Adsorption ; Endothermic process ; Wastewater ; Activated carbon ; Langmuir adsorption model ; Chemisorption ; Chemistry ; Nuclear chemistry ; Langmuir ; Chemical engineering ; Physisorption ; Pulp and paper industry ; Materials science ; Organic chemistry ; Environmental engineering ; Environmental science Nanomaterials for catalytic reactions ; Adsorption and biosorption for pollutant removal ; Graphene and Nanomaterials Applications
Authors: Viktor Eriksson | L. P. Beckerman | Erik Aerts | Markus Andersson Trojer | Lars Evenäs
Source: Langmuir (article, 2023-11-17)
Field: Chemistry — Organic Chemistry

Polyanhydride Microcapsules Exhibiting a Sharp pH Transition at Physiological Conditions for Instantaneous Triggered Release Stimulus-responsive microcapsules pose an opportunity to achieve controlled release of the entire load instantaneously upon exposure to an external stimulus. Core-shell microcapsules based on the polyanhydride poly(bis(2-carboxyphenyl)adipate) as a shell were formulated in this work to encapsulate the model active substance pyrene and enable a pH-controlled triggered release. A remarkably narrow triggering pH interval was found where a change in pH from 6.4 to 6.9 allowed for release of the entire core content within seconds. The degradation kinetics of the shell were measured by both spectrophotometric detection of degradation products and mass changes by quartz crystal microbalance with dissipation monitoring and were found to correlate excellently with diffusion coefficients fitted to release measurements at varying pH values. The microcapsules presented in this work allow for an almost instantaneous triggered release even under mild conditions, thanks to the designed core-shell morphology. Quartz crystal microbalance ; Chemistry ; Controlled release ; Adipate ; Dissipation ; Chemical engineering ; Kinetics ; Mass transfer ; Chromatography ; Analytical Chemistry (journal) ; Polymer chemistry ; Thermodynamics ; Organic chemistry ; Adsorption Antimicrobial agents and applications ; Dendrimers and Hyperbranched Polymers ; Polymer Surface Interaction Studies
Authors: Yeşim Güçbilmez | Yusuf Yavuz | İbrahim Çalış | Adife Şeyda Yargıç | Ali Savaş Koparal
Source: Heliyon (article, 2023-04-24)
Field: Chemistry — Organic Chemistry

Low temperature synthesis of MCM-48 and its adsorbent capacity for the removal of basic red 29 dye from model solutions The low temperature synthesis of MCM-48 was performed and its adsorptive properties were investigated for the first time in literature by studying Basic Red 29 (BR29) dye adsorption from model solutions. The modification of the surface properties and pore structure of silica-based material MCM-48 induced by BR29 adsorption were characterized using XRD, nitrogen physisorption, and SEM methods before and after dye adsorption. The effects of contact time, solution pH, dye concentration, and temperature on the adsorption capacity of MCM-48 were investigated. Different adsorption models and different kinetic models were used, respectively to define the equilibrium data and the kinetics of adsorption. Adsorption data was seen to fit the Langmuir isotherm and the pseudo-second-order kinetic model. In addition, MCM-48 was found to be very successful for the removal of the BR29 dye model solutions, even at an initial dye concentration of 500 mg/L for which the removal efficiency was above 97%. Adsorption ; Chemical engineering ; Chemistry ; Materials science ; Chromatography ; Nuclear chemistry ; Organic chemistry ; Engineering Nanomaterials for catalytic reactions ; Mesoporous Materials and Catalysis ; Adsorption and biosorption for pollutant removal
Authors: Khadiga Mohamed Abas | A. Attia
Source: BMC Chemistry (article, 2023-07-24)
Field: Materials Science — Biomaterials

Thermoplastic starch (TPS)-based composite films for wastewater treatment: synthesis and fundamental characterization Modification of starch is a potential basic research aiming to improve its water barrier properties. The general purpose of this study is to manufacture cross-linked iodinated starch citrate (ISC) with a degree of substitution (DS) ≈ 0.1 by modifying native corn starch with citric acid in the presence of iodine as an oxidizing agent. Thermoplastic starch (TPS) was generated with urea as a plasticizer and blended with various concentrations of ISC of (2, 4, 6%) (wt/wt) to obtain (UTPS/ISC<sub>2</sub>, UTPS/ISC<sub>4</sub>, and UTPS/ISC<sub>6</sub>). Nanocomposite film was formed from UTPS/ISC<sub>2</sub> in presence of stabilized iodinated cellulose nanocrystals UTPS/ISC<sub>2</sub>/SICNCs via gelatinization at a temperature of 80ºC. Water solubility and water vapor release were studied amongst the water barrier features. The fabricated starch-based composite films were evaluated utilizing Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electronic Microscope analysis (SEM), surface area, and tensile measurements. The adsorption of crystal violet (CV) dye onto produced samples was examined in an aqueous solution. The findings revealed that the UTPS/ISC<sub>2</sub>/ISCNCs has 83% crystal violet elimination effectiveness. Moreover, the adsorption isotherms were assessed and figured out to vary in the order of Langmuir > Temkin > Freundlich > Dubinin-Radushkevich. Thermoplastic ; Composite number ; Characterization (materials science) ; Materials science ; Starch ; Polymer science ; Composite material ; Chemical engineering ; Process engineering ; Nanotechnology ; Engineering ; Chemistry ; Organic chemistry Nanocomposite Films for Food Packaging ; biodegradable polymer synthesis and properties ; Advanced Cellulose Research Studies
Authors: М. А. Гаврилова | Diana Gavrilova | S. K. Evstropiev | Andrey Shelemanov | Igor Bagrov
Source: Ceramics (article, 2023-08-02)
Field: Materials Science — Materials Chemistry

Porous Ceramic ZnO Nanopowders: Features of Photoluminescence, Adsorption and Photocatalytic Properties The grainy and porous ZnO powders were synthesized by thermal decomposition of zinc nitrate and polymer-salt method. The comparative study of the crystal structure, morphology, luminescence, adsorptive and photocatalytic properties of ZnO powders was carried out. The addition of PVP in initial aqueous solutions of zinc nitrate determines the remarkable change of powder morphology and decreases the average size of ZnO nanocrystals. Luminescence spectra in the visible spectral range indicate the significant difference of structural defects types in grainy and porous powders. Porous powders demonstrate high ability for singlet oxygen photogeneration and photocatalytic properties. The kinetics of diazo dye adsorption on both powders is described successfully by the kinetic equation of pseudo-second order. Kinetic dependencies of photocatalytic oxidation of Chicago Sky Blue diazo dye using as grain ZnO powder so as porous ZnO powders are described by the Langmuir–Hinshelwood model but process rates are different. Porous ZnO powder demonstrates strong ability for photogeneration of singlet oxygen under visible irradiation and high photocatalytic properties (rate constant 0.042 min−1). Photocatalysis ; Materials science ; Zinc nitrate ; Luminescence ; Adsorption ; Photoluminescence ; Porosity ; Zinc ; Chemical engineering ; Singlet oxygen ; Composite material ; Oxygen ; Chemistry ; Metallurgy ; Physical chemistry ; Catalysis ; Organic chemistry ZnO doping and properties ; Advanced Photocatalysis Techniques ; Copper-based nanomaterials and applications
Authors: Abdelhadi El Rhilassi | Nouhaila Ferraa | M. Bennani-Ziatni
Source: Current Chemistry Letters (article, 2023-12-25)
Field: Materials Science — Materials Chemistry

Kinetic, isotherm and thermodynamic studies of the adsorption of phenol and tyrosine onto apatitic tricalcium phosphate The present study was conducted to evaluate the feasibility of apatitic tricalcium phosphate with a Ca/P ratio of 1.50 for the adsorption of phenol and tyrosine from aqueous solutions. The adsorbent was synthesized at room temperature using an aqueous double decomposition method and characterized through physicochemical methods. Batch adsorption studies were conducted as a function of contact time, initial adsorbate concentration, temperature, and pH. The adsorption kinetics of phenol and tyrosine were well fitted to the pseudo-second-order model. The maximum adsorption capacity was found to be 5.56 mg/g for phenol and 9.65 for tyrosine mg/g at 298 K. The adsorption of phenol and tyrosine was well explained using the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevick models. The Langmuir model is the most suitable, with a maximum monolayer adsorption capacity of 7.32 mg/g for phenol and 11.43 mg/g for tyrosine at 298 K. The thermodynamic parameters indicate that the adsorption process is favorable, spontaneous, exothermic, and controlled by physisorption with electrostatic interactions between compounds containing the phenolic group and apatite. The results of this study have demonstrated the potential utility of apatitic tricalcium phosphate, which could be developed into a viable technology for the adsorption of compounds containing the phenolic group from aqueous solutions. Chemistry ; Adsorption ; Aqueous solution ; Langmuir ; Freundlich equation ; Phenol ; Phosphate ; Langmuir adsorption model ; Physisorption ; Inorganic chemistry ; Nuclear chemistry ; Monolayer ; Organic chemistry ; Biochemistry Crystallization and Solubility Studies ; Electrochemical sensors and biosensors ; Electrochemical Analysis and Applications
Authors: M. I. A. Abdel Maksoud | M.A. Youssef | H. S. Hassan
Source: Scientific Reports (article, 2023-12-07)
Field: Chemistry — Inorganic Chemistry

Evaluation of barium tungstate nanocrystals for the sorption of radioactive cobalt and europium from aqueous solutions Herein, barium tungstate BaWO<sub>4</sub> nanocrystals were chemically prepared and then estimated as inorganic sorbent material to eliminate the radioactive cobalt and europium from the waste stream. The characterization of BaWO<sub>4</sub> nanocrystals is completed over several analytical techniques. TEM and SEM images show the formation of sphere-shaped BaWO<sub>4</sub> structures in the nanoscale range. Also, XRD and FTIR revealed the successful preparation of BaWO<sub>4</sub>. Optimum factors affected by the sorption process are determined using batch mode. Sorption equilibrium was achieved after 60 min with the initial concentration of metal ion at 100 mg/L and at optimum pH five for both radionuclides, respectively. The different kinetic models are applied. The obtained data shows that the sorption process followed a pseudo-second order. The sorption capacity for <sup>60</sup>Co at pH of 5 and 25 °C is 310.6 mg g<sup>-1</sup>, and <sup>152+154</sup>Eu is 409.9 mg g<sup>-1</sup>. The thermodynamic studies illustrated that the sorption process was spontaneous and endothermic. Sorption ; Europium ; Aqueous solution ; Cobalt ; Tungstate ; Endothermic process ; Sorbent ; Nuclear chemistry ; Inorganic chemistry ; Nanocrystal ; Barium ; Materials science ; Chemistry ; Adsorption ; Ion ; Nanotechnology ; Physical chemistry ; Organic chemistry Radioactive element chemistry and processing ; Nuclear materials and radiation effects ; Chemical Synthesis and Characterization
Authors: Denisse Mena-Silva | Aline Alfaro | Andrea León | Emanuel Guajardo-Correa | Estefanía Elgueta | Patrícia Silva Diaz | Cristián Vilos | Hugo Cárdenas | Juliano C. Denardin | Pedro A. Orihuela
Source: International Journal of Molecular Sciences (article, 2023-06-30)
Field: Materials Science — Biomaterials

Zeolite Nanoparticles Loaded with 2-Methoxystradiol as a Novel Drug Delivery System for the Prostate Cancer Therapy The estrogen metabolite 2-methoxyestradiol (2ME) is a promissory anticancer drug mainly because of its pro-apoptotic properties in cancer cells. However, the therapeutic use of 2ME has been hampered due to its low solubility and bioavailability. Thus, it is necessary to find new ways of administration for 2ME. Zeolites are inorganic aluminosilicates with a porous structure and are considered good adsorbents and sieves in the pharmaceutical field. Here, mordenite-type zeolite nanoparticles were loaded with 2ME to assess its efficiency as a delivery system for prostate cancer treatment. The 2ME-loaded zeolite nanoparticles showed an irregular morphology with a mean hydrodynamic diameter of 250.9 ± 11.4 nm, polydispersity index of 0.36 ± 0.04, and a net negative surface charge of -34 ± 1.73 meV. Spectroscopy with UV-vis and Attenuated Total Reflectance Infrared Fourier-Transform was used to elucidate the interaction between the 2ME molecules and the zeolite framework showing the formation of a 2ME-zeolite conjugate in the nanocomposite. The studies of adsorption and liberation determined that zeolite nanoparticles incorporated 40% of 2ME while the liberation of 2ME reached 90% at pH 7.4 after 7 days. The 2ME-loaded zeolite nanoparticles also decreased the viability and increased the mRNA of the 2ME-target gene F-spondin, encoded by SPON1, in the human prostate cancer cell line LNCaP. Finally, the 2ME-loaded nanoparticles also decreased the viability of primary cultures from mouse prostate cancer. These results show the development of 2ME-loaded zeolite nanoparticles with physicochemical and biological properties compatible with anticancer activity on the human prostate and highlight that zeolite nanoparticles can be a good carrier system for 2ME. Drug delivery ; Prostate cancer ; Drug ; Medicine ; Cancer ; Nanoparticle ; Cancer therapy ; Prostate ; Targeted drug delivery ; Nanotechnology ; Pharmacology ; Internal medicine ; Materials science Nanoparticle-Based Drug Delivery ; X-ray Diffraction in Crystallography ; Dendrimers and Hyperbranched Polymers