jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Xingfeng Cao | Gongduan Fan | Shiyun Wu | Jing Luo | Yuhan Lin | Weixin Zheng | Shuangyu Min | Kaiqin Xu
Source: Water (review, 2024-11-28)
Field: Materials Science — Materials Chemistry

Preparation of Iron-Based Nanozymes and Their Application in Water Environment: A Review Nanozymes represent a new generation of artificial enzymes that combine nanomaterial properties with catalytic activities similar to those of natural enzymes. It has significant advantages in catalytic efficiency, selectivity, and stability, leading to increasing interest in their application in aqueous environments. Since the discovery of enzyme-like activity in Fe3O4, more and more iron-based nanozymes have been utilised for the detection and removal of pollutants. Iron is a non-toxic, low-cost transition metal, and this property makes iron-based nanozymes more compatible with safety requirements in aqueous environmental applications. Although iron-based nanozymes have demonstrated significant advantages in the water environment field, the relevant research is still in its infancy. Therefore, it is of great practical significance to systematically summarise the latest applications of iron-based nanozymes in the water environment. This paper describes the common methods of synthesising iron-based nanozymes. In addition, the applications of iron-based nanozymes in detecting pollutants and pollutant removal are reviewed. It was found that the removal of pollutants by iron-based nanozymes was mainly achieved through the reactive oxygen species, whereas the recognition of pollutants primarily depended on the reactions of iron-based nanozymes, such as colour development, fluorescence, and chemiluminescence. Finally, we highlight the challenges and future prospects for the application of iron-based nanozymes in water environments. In summary, this paper systematically summaries and discusses the common synthesis methods of iron-based nanozymes and their applications in the aquatic environment, with a view to providing new ideas for overcoming the limitations of traditional pollutant detection and removal methods and realising the high-quality development of iron-based nanozymes in water environment. Environmental science ; Environmental chemistry ; Chemistry ; Nanotechnology ; Materials science Advanced Nanomaterials in Catalysis ; Advanced Photocatalysis Techniques ; Nanocluster Synthesis and Applications
Authors: Sanaa Tareq | Souad A. Mousa | Eman A. Muhammed
Source: Baghdad Science Journal (article, 2024-04-20)
Field: Chemistry — Organic Chemistry

Synthesis Catalyst of Loading Nano Platinum on Graphene Nanosheets and Photodegradation of Bromophenol blue in Ultra-violet light. تم في هذا البحث استخدام المحفز الجديد المصنع من تحميل دقائق البلاتين النانوية على سطح الصفائح النانوية للكرافين كمحفز ضوئي واختباره لدراسة التجزئة الضوئية لملوثات المياه وازالتها بشكل نهائي من مصادر المياه لما لها من تأثير سلبي على البيئة. حيث تم استخدام صبغة البروموفينول الأزرق كمثال على أحد الملوثات. في البدء تم التأكد من تحضير المحفز بالطريقة المستخدمة في طريقة العمل من خلال تشخيصه باستخدام عدد من التقنيات ومنها تقنية المجهر الالكتروني النافذ عالي الدقة، تقنية طاقة تشتت الاشعة السينية الطيفي عن طريق قياس الامتزاز/ الامتزاز باستخدام غاز النتروجين. كذلك تم قياس المساحة السطحية للمحفز المصنع، بالإضافة الى فحص التركيب الكريستال للمحفز باستخدام تقنية حيود الاشعة السينية. وبعد ان تم التأكد من التركيب النهائي للمحفز الضوئي تضمن الجزء الثاني من العمل دراسة قدرة المحفز المصنع على استخدامه في التجزئة الضوئية لصبغة البروموفينول الأزرق تحت الاشعة فوق البنفسجية حيث تم تحضير عدة تراكيز من صبغة البروموفينول الأزرق، تم تشعيع الصبغة بدون وجود المحفز ووجد بان التجزئة الضوئية لم تكن فعالة وبعد ذلك تم استخدام المحفز مع المحلول المائي للصبغة وبتركيز 15 جزء من المليون وأجريت التجارب باستخدام عدة اوزان من المحفز لتحديد افضل وزن يمكن استخدامه من المحفز في كمية محددة من محلول الصبغة ووجد ان 0.01 غرام من الصبغة لكل 250 ملليتر من المحلول المائي للصبغة هو افضل نسبة يمكن الحصول عليها. كما تم اختبار الوسط للتفاعل في الوسطين الحامضي والقاعدي ووجد ان تفكك الصبغة يزداد بشكل ملحوظ في الوسط القاعدي. تم اقتراح ميكانيكية التفاعل التي بينت ان تكون الجذور الحرة لها دور كبير في مهاجمة الاواصر المزدوجة في الصبغة. Bromophenol blue ; Photodegradation ; Graphene ; Catalysis ; Platinum ; Materials science ; Nano- ; Blue light ; Photocatalysis ; Chemical engineering ; Nanotechnology ; Photochemistry ; Chemistry ; Optoelectronics ; Organic chemistry ; Composite material ; Chromatography Nanomaterials for catalytic reactions
Authors: Alexandra Siklitskaya | Tomasz Bednarek | James Pogrebetsky | Adam Kubas
Source: Materials Chemistry Frontiers (article, 2024-12-13)
Field: Chemistry — Physical and Theoretical Chemistry

An overview of physical and chemical long-range phenomena governed by Friedel oscillations: a bridge between physics and chemistry Friedel oscillations (FOs) are quantum phenomena observed as electron density oscillatory behavior due to impurity/defect in a medium containing electron gas. Here, FOs are discussed from physical, chemical, and computational perspectives. Friedel oscillations ; Bridge (graph theory) ; Range (aeronautics) ; Nanotechnology ; Chemical physics ; Physics ; Chemistry ; Materials science ; Organic chemistry ; Composite material ; Medicine Advanced Physical and Chemical Molecular Interactions ; Mechanical and Optical Resonators
Authors: Heru Suryanto | Uun Yanuhar | Husni Wahyu Wijaya | Joseph Selvi Binoj | Azlin Fazlina Osman | Poppy Puspitasari | Jibril Maulana | Nico Rahman Caesar | Fajar Nusantara | Komarudin Komarudin
Source: Journal of the Korean Wood Science and Technology (article, 2024-09-01)
Field: Materials Science — Biomaterials

Synthesis and Characterization of Magnetic Cellulose Powder from Sawdust Waste Timber industry waste is being examined for cellulose manufacturing to give important benefits. The study’s goal is to investigate the properties of cellulose powder derived from sawdust waste after it has been reinforced with ferrous-ferric oxide nanoparticles (Fe3O4-NPs). Sawdust cellulose powder was produced from Sengon (Albizia chinensis) wood waste in this study. The crushed sawdust waste is handled with alkalization and bleaching. Cellulose powder is then reinforced with Fe3O4-NPs at 10 wt.%, 20 wt.%, and 30 wt.%. The magnetic cellulose powder was analysed by X-ray diffraction, Fourier Transform Infrared, scanning electron microscopy morphology, magnetic vibrating sample magnetometer, Brunauer-Emmett teller, and adsorption tests for Methylene Blue and Congo Red dyes. Structure study identifies sawdust as cellulose 1β, with peaks at 14°, 16°, and 22° diffraction angles. The addition of Fe3O4-NPs reduces the crystalline index of sawdust cellulose powder from 68.50% to 63.38%, and functional group bond analysis revealed many peak shifts indicating a change in the chemical bonds of magnetic cellulose powder. Incorporating Fe3O4-NPs into sawdust cellulose powder confers magnetic and superparamagnetic properties to the sawdust cellulose. Similarly, the surface texture of magnetic cellulose seems rougher as the surface area increases. These parameters imply a 31.8% increase in Congo Red adsorption, using adsorption kinetics based on the pseudo-first-order model. Sawdust ; Characterization (materials science) ; Cellulose ; Materials science ; Pulp and paper industry ; Nuclear chemistry ; Waste paper ; Waste management ; Chemistry ; Organic chemistry ; Nanotechnology ; Engineering Advanced Cellulose Research Studies
Authors: Zongkun Chen | Qiqi Fan | Xingkun Wang | Liqun Kang | Wenchao Wan | Jonathan Avaro | Siyuan Zhang | Christina Scheu | Jian Zhou | Serena DeBeer | Saskia Heumann | Minghua Huang | Heqing Jiang | Helmut Cölfen
Source: National Science Review (article, 2024-12-23)
Field: Materials Science — Materials Chemistry

Mechanistic insights into the formation of hydroxides with unconventional coordination environments to achieve their cost-effective synthesis Transition metal hydroxides, comprising metal-centered polyhedra, are abundant in nature and have a broad range of applications. Although the intercalation/deintercalation of polyhedra with unconventional coordination numbers (UCN) plays a pivotal role in their formation process and influences their chemical behavior, the detailed mechanism remains obscure. Here, taking the kinetically controlled growth of Co(OH)<sub>2</sub> as a model system (where polyhedra with UCN refers to 4-coordinated tetrahedra), by combining <i>in situ</i> pH measurement and <i>in situ</i> ultraviolet-visible (UV-vis) spectroscopy, we tracked Co<sup>2+</sup> tetrahedral intercalation/deintercalation with varying OH<sup>-</sup> concentrations, discovering that the initial Co<sup>2+</sup> tetrahedral intercalation into the Co(OH)<sub>2</sub> lattice is inevitable and its retention is influenced by the effective OH<sup>-</sup> concentration, challenging previous beliefs about the formation of Co(OH)<sub>2</sub> and potentially other hydroxides. More importantly, an understanding of the intercalation mechanism would significantly contribute to optimization of the synthesis conditions of hydroxides with tunable coordination environments, which hold significant application potential, as evidenced by a proof-of-concept application in the oxygen evolution reaction. Biochemical engineering ; Computer science ; Engineering Layered Double Hydroxides Synthesis and Applications ; Polyoxometalates: Synthesis and Applications ; Catalysis and Oxidation Reactions
Authors: Mahnaz Mirheidari | Ali Kareem Abbas | Javad Safaei‐Ghomi
Source: Scientific Reports (article, 2024-11-03)
Field: Chemistry — Organic Chemistry

Supported phenylalanine on core-shell mesoporous microsphere as a catalyst for the synthesis of triazolo[1,2-a] indazole-triones and spiro triazolo[1,2-a] indazole-tetraones In recent years, mesoporous silica materials have gained attention due to their unique properties, such as high surface area, pore volume, size, and chemical stability. These characteristics make them effective in various fields, particularly efficient supports in heterogeneous catalytic reactions. The present study developed a novel type of core-shell mesoporous microsphere material by anchoring phenylalanine on a core-shell SiO<sub>2</sub>@NiO@MS support. The catalyst support (SiO<sub>2</sub>@NiO@MS) was synthesized through homogeneous precipitation and sol-gel methods, with NiO encapsulated within the porous silica. The catalyst was characterized using various techniques, including Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS), Elemental mapping analysis, N<sub>2</sub> adsorption-desorption, Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM), and Thermogravimetric analysis (TGA). It was then employed for the synthesis of triazolo[1,2-a]indazole-trione and spiro triazolo[1,2-a]indazole-tetraones compounds from 4-phenyl urazole, dimedone, and aromatic aldehydes or isatin derivatives. This synthetic approach offers multiple advantages, including high yields, faster reaction times, low catalyst requirements, and environmentally sustainable conditions. Indazole ; Mesoporous material ; Microsphere ; Catalysis ; Chemistry ; Combinatorial chemistry ; Core (optical fiber) ; Shell (structure) ; Phenylalanine ; Computer science ; Materials science ; Stereochemistry ; Chemical engineering ; Organic chemistry ; Biochemistry ; Amino acid Multicomponent Synthesis of Heterocycles ; Microwave-Assisted Synthesis and Applications ; Chemical Synthesis and Reactions
Authors: Emmanuel Bentil Asare Adusei | Vincent Casetti | Calvin Goldsmith | Madison Caswell | Drecila Alinj | J.P. Park | Mat­thias Zeller | Alexander A. Rusakov | Zacharias J. Kinney
Source: RSC Advances (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Bent naphthodithiophenes: synthesis and characterization of isomeric fluorophores Thiophene-containing heteroarenes are one of the most well-known classes of π-conjugated building blocks for photoactive molecules. Isomeric naphthodithiophenes (NDTs) are at the forefront of this research area due to their straightforward synthesis and derivatization. Notably, NDT geometries that are bent - such as naphtho[2,1-<i>b</i>:3,4-<i>b</i>']dithiophene (α-NDT) and naphtho[1,2-<i>b</i>:4,3-<i>b</i>']dithiophene (β-NDT) - are seldom employed as photoactive small molecules. This report investigates how remote substituents impact the photophysical properties of isomeric α- and β-NDTs. The orientation of the thiophene units plays a critical role in the emission: in the α(OHex)R<sub>2</sub> series conjugation from the end-caps to the NDT core is apparent, while in the β(O<i>i</i>-Pent)R<sub>2</sub> series minimal change is observed unless strong electron acceptors, such as β(O<i>i</i>-Pent)(PhCF<sub>3</sub>)<sub>2</sub>, are employed. This push-pull acceptor-donor-acceptor (A-D-A) fluorophore exhibits positive fluorosolvatochromism that correlates with increasing solvent polarity parameter, <i>E</i> <sub>T</sub>(30). In total, these results highlight how remote substituents are able to modulate the emission of isomeric bent NDTs. Characterization (materials science) ; Bent molecular geometry ; Chemistry ; Nanotechnology ; Materials science ; Organic chemistry Porphyrin and Phthalocyanine Chemistry ; Synthesis and Properties of Aromatic Compounds ; Organic Electronics and Photovoltaics
Authors: Xinyan Guo | Yucui Zhang | Baojian Huang | Lei Han
Source: ChemRxiv (preprint, 2024-04-01)
Field: Materials Science — Materials Chemistry

Artificial Enzyme with Organophosphorus Hydrolase-Like Activity-Quenched Aggregation-Induced Emission Effect: Self-Reporting and Specific Assay of Nerve Agents Given the promising prospect of organophosphorus hydrolase (OPH)-like nanozymes in a biochemical assay, it is interesting and significant to combine two signal channels into one method for nerve agents and organophosphorus pesticide detection. Here, AIEzyme with bifunctionality was designed and synthesized via simple heating process, which integrates the OPH-like catalytic feature of AIE material and their fluorescence property. It exhibited a detector response via both fluorescence and visible colorimetric observation. Moreover, the OPH-mimicking activity of AIEzyme exhibits high catalytic activity and does not produce ROS, freeing the corresponding detection system from interference in a colorimetric assay. Interestingly, AIEzyme with OPH-like activity-caused quenching effect on inherent fluorescence, which triggers a self-reporting and specific nerve agents assay process based on the unique features of AIEzyme. Due to the complementary and synergistic effects of the integration of the two signals in one method, a simple dual-mode colorimetric and fluorescence assay with specific sensitivity, high flexibility, and portability is established, which not only improves analytical efficiency but also expands the detection range. The proposed strategy will open avenues for expanding the application of AIE materials and artificial enzymes such as environmental monitoring and food safety. Hydrolase ; Nerve agent ; Chemistry ; Aggregation-induced emission ; Enzyme ; Biophysics ; Enzyme assay ; Biochemistry ; Biology ; Physics ; Fluorescence ; Acetylcholinesterase Luminescence and Fluorescent Materials ; Molecular Sensors and Ion Detection ; Organoselenium and organotellurium chemistry
Authors: Xuejian Li | Xiaojun Wang | Hailong Shi | Yuchao Jin | Xiaoshi Hu | Chao Xu | Lunyuan Tang | Min Ma | Liwei Lu
Source: Materials (article, 2024-02-15)
Field: Materials Science — Materials Chemistry

Bubble-Mediated Production of Few-Layer Graphene via Vapor–Liquid Reaction between Carbon Dioxide and Magnesium Melt It is urgent to develop novel technologies to convert carbon dioxide to graphene. In this work, a bubble-mediated approach via a chemical reaction between carbon dioxide gas and magnesium melt to fabricate a few-layer graphene was illustrated. The morphology and defects of graphene can be regulated by manipulating the melt temperature. The preparation of graphene at 720 °C exhibited an excellent quality of surface and graphitization degree. The high-quality few-layer graphene can be grown under the combined effect of carbon dioxide bubbles and in-situ grown MgO. This preparation method possesses the advantages of high efficiency, low cost, and environmental protection, which may provide a new strategy for the recovery and reuse of greenhouse gases. Graphene ; Materials science ; Carbon dioxide ; Magnesium ; Chemical engineering ; Layer (electronics) ; Carbon fibers ; Bubble ; Nanotechnology ; Graphene foam ; Graphene oxide paper ; Composite material ; Metallurgy ; Organic chemistry ; Chemistry ; Composite number Graphene research and applications ; Graphene and Nanomaterials Applications ; Supercapacitor Materials and Fabrication
Authors: Kostya S. Novoselov | Mikhail Mironov | Dmitry I. Yakubovsky | Georgy A. Ermolaev | Igor A. Khramtsov | Roman V. Kirtaev | Aleksandr S. Slavich | Gleb Tselikov | Andrey A. Vyshnevyy | Aleksey V. Arsenin | Valentyn S. Volkov
Source: Research Square (preprint, 2024-06-14)
Field: Materials Science — Materials Chemistry

Graphene-inspired quasi-two-dimensional gold films Nanotechnology ; Graphene ; Fabrication ; Electronics ; Materials science ; Transparency (behavior) ; Photonics ; Plasmon ; Computer science ; Engineering physics ; Optoelectronics ; Engineering ; Electrical engineering Graphene research and applications ; 2D Materials and Applications ; Quantum Dots Synthesis And Properties
Authors: Julian Sobieski | Adam Gorczyński | Arman Moini Jazani | Görkem Yılmaz | Krzysztof Matyjaszewski
Source: Angewandte Chemie (article, 2024-11-29)
Field: Chemistry — Organic Chemistry

Better Together: Photoredox/Copper Dual Catalysis in Atom Transfer Radical Polymerization Abstract Photomediated Atom Transfer Radical Polymerization (photoATRP) is an activator regeneration method, which allows for the controlled synthesis of well‐defined polymers via light irradiation. Traditional photoATRP is often limited by the need for high‐energy ultraviolet or violet light. These could negatively affect the control and selectivity of the polymerization, promote side reactions, and may not be applicable to biologically relevant systems. This drawback can be circumvented by an introduction of the catalytic amount of photocatalysts, which absorb visible and/or NIR light and, therefore, controlled, regenerative ATRP can be performed with the dual‐catalytic cycle. Herein, a critical summary of recent developments in the field of dual‐catalysis concerning Cu‐catalyzed ATRP is provided. Contributions of involved species are examined mechanistically, followed by challenges and future directions towards the next generation of advanced functional macromolecular materials. Photoredox catalysis ; Atom-transfer radical-polymerization ; Chemistry ; Photochemistry ; Copper ; Polymerization ; Catalysis ; Reversible addition−fragmentation chain-transfer polymerization ; Dual (grammatical number) ; Polymer chemistry ; Radical polymerization ; Organic chemistry ; Photocatalysis ; Polymer Advanced Polymer Synthesis and Characterization ; Radical Photochemical Reactions ; Click Chemistry and Applications
Authors: Laura Díaz‐Casado | Enrique Mann | Ester Jiménez‐Moreno | Alejandro Villacampa | Laura Montalvillo‐Jiménez | Claudia Sánchez-García | Francisco Corzana | Jesús Jiménez‐Barbero | Ana M. Gómez | Andrés G. Santana | Juan Luis Asensio
Source: JACS Au (article, 2024-10-14)
Field: Materials Science — Biomaterials

Opposed Aromatic Surfaces Behave as Independent Binding Sites for Carbohydrate Stacking: Analysis of Sandwich-like CH/π/CH Complexes CH/π bonds are versatile elements for the construction of complex molecular architectures, thus playing key roles in many biomolecular recognition processes. Although seldom acknowledged, aromatic units are inherently bivalent and can participate in CH/π bonds through either face simultaneously, leading to the formation of <i>ternary</i> stacking complexes. This sandwich-like arrangement is by far the most common in natural complexes and could potentially lead to negative cooperativity due to unfavorable polarization or electrostatic effects, especially when polarized CH fragments are involved. To evaluate the energetics of such interaction modes, we selected a biologically relevant model, <i>carbohydrate/aromatic stacking</i>, and conducted an experimental analysis comparing <i>binary</i> CH/π interactions to <i>ternary</i> CH/π/CH stacking. Our approach utilized a dynamic combinatorial strategy, which is well-suited to reveal minor stability differences among aromatic complexes. Our results showed that carbohydrate/aromatic stacking is relatively insensitive to molecular recognition events occurring on the opposite side of the aromatic platform, whether exposed to water or involved in additional CH/π contacts, with free energy fluctuations lower than 10%. Based on these data, for all practical purposes, the two opposing aromatic surfaces can be considered independent, noninteracting binding sites, making aromatic platforms optimal connecting elements for supramolecular cross-linking. Stacking ; Chemistry ; Crystallography ; Stereochemistry ; Biophysics ; Computational chemistry ; Organic chemistry ; Biology Supramolecular Self-Assembly in Materials ; Supramolecular Chemistry and Complexes ; Protein Structure and Dynamics
Authors: Santosh Kumar B | V Manasa | Atul Singla | Lalit Kumar Tyagi | Arun Pratap Srivastava | Hawraa A. Kareem
Source: E3S Web of Conferences (article, 2024-01-01)
Field: Chemistry — Organic Chemistry

RETRACTED: Green Microwave-Assisted Cladding: Enhancing SS-304 with Ni-ZrB2 Composite Coatings Following the publication of the Retraction notice , this article was formally retracted on 3 April 2026. Composite number ; Materials science ; Microwave ; Cladding (metalworking) ; Composite material ; Metallurgy ; Telecommunications ; Computer science Microwave-Assisted Synthesis and Applications ; Catalysis and Hydrodesulfurization Studies ; Materials Engineering and Processing
Authors: Alfan Sarifudin | Indri Yaningsih | Budi Kristiawan | Ubaidillah Ubaidillah | Dominicus Danardono Dwi Prija Tjahjana | Takahiko Miyazaki | Kyaw Thu | Kim Ki-Seong
Source: Evergreen (article, 2024-09-01)
Field: Materials Science — Polymers and Plastics

Recent Material Research Advances for Photothermal Absorbers One of the primary components in solar photothermal collectors is the absorber because its role is very influential on system performance.Recent research on developing solar photothermal absorbents has found materials with impressive absorption performance of more than 90%.The next challenge is to find environmentally friendly materials, simple and easy to manufacture, available in abundance, easy to recycle, easy to install, durable, and easy to maintain while maintaining high performance.In addition, the existing solar thermal collector is varied and requires selecting appropriate materials.Therefore, this study presents a brief review to make it easier for engineers to choose the most suitable material for solar thermal application, which is designed based on the latest research findings.Moreover, this study is also helpful for researchers as a reference source to find novelty and state-of-the-art research on photothermal absorber materials. Photothermal therapy ; Materials science ; Nanotechnology ; Engineering physics ; Engineering Transition Metal Oxide Nanomaterials ; Thermography and Photoacoustic Techniques ; Laser Material Processing Techniques