ChemNanoMat最新文献

The rise of redox-active nanoscale zerovalent iron materials toward the decontamination of heavy metals and nitroaromatics is witnessing upward trend toward sustainable water treatment technologies. Herein, we synthesize air-stable carbamodithioate-modified nanoscale zerovalent iron (NZVI-CD) via in situ route at room temperature conditions. The structure, wetting, and morphology of NZVI-CD were evaluated using various characterization techniques like XRD, FT-IR, XPS, SEM, TEM, and water contact angle (WCA) measurements. NZVI-CD showcases the excellent reduction of hexavalent chromium and p-nitrophenol under room temperature and optimal pH conditions. Kinetic studies revealed that removal of hexavalent chromium and p-nitrophenol using NZVI-CD follows pseudo second order kinetics, besides favoring Langmuir adsorption isotherm model with a maximum sorption capacity (Q_max) of 178.57 mg g⁻¹ and 45.45 mg g⁻¹ for Cr (VI) and p-nitrophenol, respectively.

Ultimate functional materials could be functional substances found in biological systems. The organization of biological organizations can be described as a rational entity composed of functional small molecules and objects. It is becoming increasingly evident that liquid interfaces play a pivotal role in the development of sophisticated biological functions. It is therefore the case that the present review discusses the subject of nanoarchitectonics in the context of liquid interfaces as the environment. Specifically, the focus is on molecular recognition, analytical techniques, specific reactions, control of molecular machines and microrobots at liquid interfaces, and regulation of biological phenomena utilizing liquid interface environments. These examples will illustrate the role of liquid interfaces in achieving delicate nanoarchitectonics. The electronic properties are modulated in accordance with the variations in dielectric natures, extending perpendicularly to the interface. This enables delicate control of intermolecular interactions. Concurrently, the application of delicate forces within the interface direction facilitates precise structural adjustments of molecular structures analogous to those observed in biological systems. This theme is positioned as the convergence of chemistry (Chem) and nanotechnology/nanoarchitectonics (Nano) for materials (Mat) creation. This paper reveals the unexpectedly important role liquid interfaces can play within this context.

In the Review by Yen-Pei Fu and co-workers, recent progress in bismuth-based photocatalysts for nitrogen reduction reactions is highlighted. Through strategies such as defect engineering, heterojunction construction, crystal facet tuning, and morphological control, these catalysts achieve improved charge separation and catalytic activity. The advances pave the way for sustainable ammonia synthesis and inspire future design of high-performance bismuth-based photocatalysts.

Under anodic bias in a fluoride-containing electrolyte, TiO₂ nanotube arrays undergo progressive dissolution. Tube walls collapse, fragment, and detach into the surrounding medium, forming dispersed nanoparticles. This self-driven top-down transformation is initiated by the electric field and sustained by chemical etching, capturing the dynamic pathway from ordered architecture to particulate form. More in the Research Article by Yilan Zeng, Martin Motola, and co-workers.

Self-healing electrolytes can heal automatically when cracks occur during battery assembly or operation, improving the cycle life of lithium batteries. However, due to the weak self-healing force, the current electrolyte healing speed is relatively slow. In this work, the double synergistic action of hydrogen bond and ionic bond is used to improve the healing speed of electrolytes. In addition, the introduction of ionic liquids imparts nonflammability to the electrolyte, greatly improving safety. At room temperature, the tensile ratio of the electrolyte reaches 300%, and the conductivity reaches 7.1 × 10⁻⁴S cm⁻¹. It has a wide electrochemical window (5.1 V) and good electrochemical performance with an initial discharge specific capacity of up to 139.3 mAh g⁻¹ at 0.1 C using the LiFePO₄ cathode material.

Cobalt- and nitrogen-doped mesoporous carbons are obtained from the pyrolysis at different temperatures (700 and 900 °C) of either ZIF-67 (catena-(bis(μ₂-2-methylimidazolato)-cobalt(II)) or CoNic (catena-(bis(μ₃-nicotinato)-bis(μ₂-nicotinato)-(μ₂-aqua)-di-cobalt(II)) cobalt metal-organic frameworks (MOFs), from Co(CO₂)₂Pz (catena-((μ₂-pyrazine-2,3-dicarboxylato)-diaqua-cobalt(II) dehydrate)), a linear coordination polymer (CP), and CoCO₂Pz (diaqua-bis(pyrazine-2-carboxylato)-cobalt(II)) a complex, followed by acid treatment. The lithium storage capacities of these materials are studied as a function of the BET-specific surface area and N and Co contents, discussed in the context of the state of the art bibliography. Clear correlation between these three parameters with the material reversible maximum capacity is observed. The specific contribution to the total capacity of each one of these three structural features is discussed. The two highest capacity values are observed for ZIF-67 and Co(CO₂)₂Pz pyrolized at 700 °C, affording values of 979 and 915 mA h g⁻¹, respectively. The Co(CO₂)₂Pz 700 material exhibits a high cycle stability (400 cycles) at high rate capability. Postmortem analysis of the electrodes is carried out by means of SEM microscopy, EDX, and XPS techniques, revealing promising structural stability after challenging cycling conditions. These results are discussed in terms of the accepted mechanisms for Li storage and are relevant for the design of new anodes.

The hydrogen evolution reaction (HER)represents a cornerstone process for sustainable hydrogen production. This study explores laser-induced graphene (LIG) electrodes doped with platinum (Pt) nanoclusters deposited via magnetron sputtering, focusing on the relationship between deposition time, structural changes, and catalytic activity. The electrodes demonstrate superior HER performance, with Pt@LIG60s achieving an overpotential of 116 mV at −10 mA cm^–2 and a mass activity of 14 A mg^–1 at 100 mV, outperforming commercial Pt/C catalysts. Raman spectroscopy reveals an optimal defect density (I_D/I_G ≈ 1.17) and enhanced Pt-LIG interactions at 60 s of deposition. XPS analysis confirms the presence of Pt²⁺ species strongly anchored to LIG defect sites, facilitating efficient hydrogen adsorption and desorption. This study highlights the potential of minimal Pt loading on LIG substrates for cost-effective and high efficiency HER catalysis.

The escalating threat of Cr(VI) contamination in water due to rapid industrialization necessitates the development of effective and economical removal technologies. Herein, the synthesis of porous carbon adsorbents (MECs) is reported through a one-step carbonization process involving ethylenediaminetetraacetic acid dipotassium salt dihydrate (EDTA-2K·2H₂O) and an iron-containing metal–organic framework, MIL-100(Fe). MECs boast a high specific surface area (up to 1206.0 m² g⁻¹) and magnetic properties, rendering them suitable for the adsorption and removal of Cr(VI) ions from aqueous solutions. The effects of various parameters, including pH, adsorbent dosage, temperature, contact time, and ion concentrations, on Cr(VI) removal are systematically investigated. The results indicate that MECs not only demonstrate high adsorption capacity, selectivity, stability, and reversibility but also achieve a maximum adsorption capacity of 296.0 mg·g⁻¹ at 328.15 K within just 40 min. Furthermore, MECC, which was synthesized by directly carbonizing components MIL-100(Fe) and EDTA-2K·2H₂O at a mass ratio of 1:8, can be easily recovered via magnetic recycling. Mechanistic studies have elucidated that Cr(VI) adsorption on MECs involves both physical and chemical interactions. This research provides valuable insights into the design of porous magnetic carbon materials for Cr(VI) removal applications.

There has been a recent paradigm shift among scientists concerning the development of novel anticancer diagnostic and treatment agents. The interest lies in the utilization of nanomedicine which has triggered significant attention in cancer research. At present, nanomedicine has transformed the current landscape of science through the use of numerous nanoformulations not only in cancer diagnosis but also in treatment. Nanoformulations including but not limited to polymeric, lipidic, metallic, crystal, and quantum dots nanomaterials have been demonstrated to play a pivotal role in circumventing major challenges associated with anticancer medications such as targeting cancer cells and reducing side effects. The use of nanomaterials in cancer is largely attributed to their distinct tunable features such as small size, improved drug loading, high sensitivity, high surface area-to-volume ratio, and site specificity, all of which are key in the development of next-generation antitumoural formulations. Additionally, the versatility of these nanomedicine formulations extends to the overall improvement of the bioavailability of antitumoural medicines. Consequently, researchers are investigating the potential use of nanomaterials in oncology to improve tumor diagnosis and treatment. This article focuses on the potential role of nanomedicines in breast cancer diagnosis and treatment using polymeric, lipidic, metallic, organic, quantum dot nanomaterials which are promising for innovant therapies and personalized nanomedicine.