Monocarboxylic Acid Structural Analogues Facilitate In Situ Composite of Functional Complexes for Aqueous Batteries.

In situ composite methods have aroused research interest in materials science and acted as a novel strategy to achieve structural tailoring of materials. However, the controllable preparation of composites containing functional groups remains a challenge. Herein, we report an approach based on competitive coordination between structural analogues, by which the functionally composite metal complex (NiSH@Ni-FSA) was synthesized.

MOF-based nanomaterials for advanced aqueous-ion batteries.

Metal-organic frameworks (MOFs)-based nanomaterials have great potential in the field of electrochemical energy storage due to their abundant pore size, high specific surface area, controllable structure and porosity, and homogeneous metal center. MOFs complexes and derivatives not only inherit the original morphology characteristics of MOFs but also provide excellent electrochemical performance. Batteries operating in aqueous electrolytes are cheaper, safer, and have higher ionic conductivity than those operating in conventional organic electrolytes.

Inhibiting demetalation of ZnNC via bimetallic CoZn alloy for an efficient and durable oxygen reduction reaction.

Inhibition of demetalation due to electrochemical dissolution of metal active centers is a major challenge for the real-world commercialization of transition metals and nitrogen co-doped carbon (MNC) material catalysts. This research utilized a microchannel reactor to synthesize zeolitic imidazolate framework-8@zeolitic imidazolate framework-67, resulting in a CoZn/ZnNC material produced through a core-shell pyrolysis strategy. Direct synergistic interaction of CoZn alloy nanoparticles and ZnNC improves the activity and durability of the oxygen reduction reaction.

Quasi Fe MIL-53 nanozyme inducing ferroptosis and immunogenic cell death for cancer immunotherapy.

Nanozymes offer diverse therapeutic potentials for cancer treatment which is dependent on the development of nanomaterials. Quasi-metal-organic framework is a class of metal-organic framework-derived nanomaterials with a transition state from metal-organic frameworks towards metal oxide featuring porous structure and high activity. Herein an iron-based quasi-metal-organic framework nanozyme Q-MIL-53(Fe) is reported via a controlled deligandation strategy, exhibiting enhanced peroxidase-/catalase-mimic activity and glutathione depletion capacity, whose underlying mechanisms are studied via density functional theory calculations.

Partially sulfurized NiMn-ZIF with high stability for aqueous nickel-zinc batteries.

Partial sulfurization can effectively enhance the electrical conductivity and cycling stability of Ni-ZIF while maintaining the Ni-ZIF skeleton and porosity. Partial sulfurization was carried out by a simple hydrothermal method and metal doping was used as an aid.

Upgrading Electron Transfer with High Conductivity MOF Composites for Supercapacitors.

Supercapacitors (SCs) have emerged as promising energy storage devices, offering flexibility and smart functionalities to meet the growing demands of modern applications. However, challenges such as limited conductivity and stability continue to hinder their performance. Herein, a conductive composite was designed by forming one-dimension rod-like conductive MOFs (Ni-HHTP) on the hierarchical nickel oxalate (Ni-OA).

Valence Engineering via Polyoxometalate-Induced on Vanadium Centers for Efficient Aqueous Zinc-Ion Batteries.

Layered vanadium-based compounds have attracted attention as cathode materials for aqueous zinc-ion batteries (AZIBs) because of their low cost, high theoretical specific capacity, and abundant vanadium valence states. However, the slow migration of Zn ions and their poor cycling stability hinder their practical application in AZIBs. Herein, using a one-pot solvothermal method, the polyoxometalates (POMs) were inserted into the aluminum vanadate interlayer spacing, and a series of novel 3D nanoflower cathode materials (HAVO-MMo-X) were successfully fabricated.

Monomolecule Coupled to Oxygen-Doped Carbon for Efficient Electrocatalytic Hydrogen Peroxide Production.

The electrocatalytic production of hydrogen peroxide (HO) is an ideal alternative for the industrial anthraquinone process because of environmental friendliness and energy efficiency, depending on the activity and selectivity of catalysts. Carbon-based materials possess prospects as candidate catalysts for the production of HO. Herein, cedar-derived monolithic carbon catalysts modified with coupling oxygen doping and phthalocyanine molecules are synthesized.

Covalent organic framework nanomaterials: Syntheses, architectures, and applications.

Covalent Organic Frameworks (COFs) are characterized by high thermochemical stability, low backbone density, well-controlled physical and chemical properties, large specific surface volume and porosity, permanently open pore structure, and various synthesis strategies. These remarkable attributes confer COFs with significant potential for a myriad of applications ranging from catalysis technology, gas separation and storage, optoelectronic materials, environmental and energy sciences, and biomedical development. There are many synthetic design methods for COF materials, and dynamic covalent chemistry is the scientific basis of COF materials-oriented design, which gives the error correction ability of the covalent assembly process, and is the key to obtaining crystallization and stability at the same time.

Multifunctional Hydrogel Electronics for Synergistic Therapy and Visual Monitoring in Wound Healing.

To overcome the limitations of precise monitoring and inefficient wound exudate management in wound healing, an advanced multifunctional hydrogel electronics (MHE) platform based on MXene@MOF/FeO@C photonic crystal hydrogel is developed. This platform combines optical/electrical sensing, synergistic therapy, and real-time visual monitoring into a single, efficient system, offering a comprehensive solution for wound healing. Under photothermal stimulation, the hydrogel releases metal ions that generate hydroxyl radicals, effectively eliminating antibiotic-resistant bacteria.

Silica Nanoparticles Induce SH-SY5Y Cells Death Via PARP and Caspase Signaling Pathways.

A growing stream of research indicates that exposure to Silica nanoparticles (SiNPs) can cause nervous system damage, leading to the occurrence of neurodegenerative diseases such as Alzheimer's disease. However, the specific mechanism by which SiNPs cause neuroblast injury remains unclear and requires further research. This study established an in vitro experimental model of SH-SY5Y cells exposed to SiNPs and observed cell growth through an inverted fluorescence microscope.

Nano-Metal-Organic Frameworks Isolated in Mesoporous Structures.

As an alternative to bulk counterparts, metal-organic framework (MOF) nanoparticles isolated within conductive mesoporous carbon matrices are of increasing interest for electrochemical applications. Although promising, a "clean" carbon surface is generally associated with poor compatibility and weak interactions with metal/ligand precursors, which leads to the growth of MOFs with inhomogeneous particle sizes on outer pore walls. Here, a general methodology for in situ synthesis of eight nanoMOF composites within mesochannels with high dispersity and stability are reported.

Protein-Guided Biomimetic Calcification Constructing 3D Nitrogen-Rich Core-Shell Structures Realizing High-Performance Lithium-Sulfur Batteries.

Biomimetic calcification is a micro-crystallization process that mimics the natural biomineralization process, where biomacromolecules regulate the formation of inorganic minerals. In this study, it is presented that a protein-assisted biomimetic calcification method for the in situ synthesis of nitrogen-doped metal-organic framework (MOF) materials. A series of unique core-shell structures are created by utilizing proteins as templates and guiding agents in the nucleation step, creating ideal conditions for shell growth.

Prussian Blue Analogues "Dressed" in MXene Nanosheets Tightly for High Performance Lithium-Ion Batteries.

MXenes, have been considered as a new generation anode material in lithium-ion batteries for lower lithium-ion diffusion barriers and superior conductivity. Unfortunately, their structures are prone to aggregation and stacking, hindering further shuttle of lithium ions and electrons, resulting in lower discharge capacity. Therefore, the introduction of interlayer spacers for the preparation of MXene-based hybrids has attracted much attention.

Study of Interfacial Reaction Mechanism of Silicon Anodes with Different Surfaces by Using the In Situ Spectroscopy Technique.

The interfacial reaction of a silicon anode is very complex, which is closely related with the electrolyte components and surface elements' chemical status of the Si anode. It is crucial to elucidate the formation mechanism of the solid electrolyte interphase (SEI) on the silicon anode, which promotes the development of a stable SEI. However, the interface reaction mechanism on the silicon surface is closely related to the surface components.

Advanced Alkali Metal Batteries Based on MOFs and Their Composites.

The integration of metal-organic frameworks (MOFs) with functional materials has established a versatile platform for a wide range of energy storage applications. Due to their large specific surface area, high porosity, and tunable structural properties, MOFs hold significant promise as components in energy storage systems, including electrodes, electrolytes, and separators for alkali metal-ion batteries (AIBs). Although lithium-ion batteries (LIBs) are widely used, their commercial graphite anode materials are nearing their theoretical capacity limits, and the scarcity of lithium and cobalt resources increases costs.

Interface-Driven Catalytic Enhancements in Nitrogen-Doped Carbon Immobilized CoNiS@ReS/CC Heterostructures for Optimized Hydrogen and Oxygen Evolution in Alkaline Seawater-Splitting.

The rational design of multicomponent heterostructure is an effective strategy to enhance the catalytic activity of electrocatalysts for water and seawater electrolysis in alkaline conditions. Herein, MOF-derived nitrogen-doped carbon/nickel-cobalt sulfides coupled vertically aligned Rhenium disulfide (ReS) on carbon cloth (NC-CoNiS@ReS/CC) are constructed via hydrothermal and activation approaches. Experimental and theoretical analysis demonstrates that the strong interactions between multiple interfaces promote electron redistribution and facilitate water dissociation, thereby optimizing *H adsorption energy for the hydrogen evolution reaction (HER).

Enhancing the Electrochemical Energy Storage of Metal-Organic Frameworks: Linker Engineering and Size Optimization.

The electric conductivity and charge transport efficiency of metal-organic frameworks (MOFs) dictate the effective utilization of built-in redox centers and electrochemical redox kinetics and therefore electrochemical performance. Reticular chemistry and the tunable microcosmic shape of MOFs allow for improving their electric conductivity and charge transfer efficiency. Herein, we synthesized two Ni-MOFs (Ni-tdc-bpy and Ni-tdc-bpe) by the solvothermal reaction of Ni ions with 2,5-thiophenedicarboxylic acid (Htdc) in the presence of conjugated 4,4'-bipyridyl (bpy) and 1,2-di(4-pyridyl)ethylene (bpe) coligands, respectively.

Enhanced Photocatalytic Nitrogen Fixation over Nano-UiO-66(Zr) via Natural Chlorophyll Sensitization.

Metal-organic frameworks (MOFs) are potential semiconductor materials, but they still face limitations, such as insufficient photoresponse, high recombination rates, and inadequate N adsorption/activation capabilities. Herein, a UiO-66-based system is designed via a natural chlorophyll sensitization strategy. Density functional theory calculations confirm the coordination interactions between chlorophyll and UiO-66.

Development of Aromatic Organic Materials for High-Performance Lithium-on Batteries: Strategies, Advances and Future Perspectives.

Ever since lithium-ion batteries (LIBs) were successfully commercialized, aromatic compounds have attended every turning point in optimizing electrolytes, separators, and even electrode materials. However, the contribution of aromatic compounds has always been neglected compared to other advanced materials. At the same time, designing next-generation LIBs with higher flexibility, solid-state electrolytes, high energy density, and better Coulombic Efficiency (CE) has imposed stricter duties on aromatic components.

CoSe QDs/SnO PCNFs with high catalytic conversion kinetics towards high-efficiency Li-S batteries.

The redox reactions occurring at positive electrode of the lithium-sulfur (Li-S) batteries involve several key electrocatalytic processes that significantly impact the overall performance of the electrochemical energy storage system. This study presents a heterogeneous catalytic composite material composed of CoSe quantum dots (QDs) integrated with SnO nanosheets, which enhances the overall ionic conductivity and accessibility of active sites within the cathode. This controlled migration effectively traps polysulfides within the cathode, reducing their dissolution into the electrolyte and mitigating the shuttle effect.

Intermolecular Forces-Oriented Growth of MOF-on-MOF Heterostructures.

Well-controlled conjugation of distinct metal-organic frameworks (MOFs) with dissimilar components and structures into a multi-component MOF system is important for the design of myriad materials with structural complexity, integrated properties, and desired applications. Herein, we developed an interesting integration strategy that relies on intermolecular force, and which can overcome the difference in lattice parameters. The strategy uses the pre-formed MOF matrixes as seeds to direct the self-assembly of secondary MOF particles for the construction of hybrid MOFs.

Covalent Organic Frameworks with Regulated Water Adsorption Sites for Efficient Cooling of Electronics.

The excessive heat accumulation has been the greatest danger for chips to maintain the computing power. In this paper, a passive thermal management strategy for electronics cooling was developed based on the water vapor desorption process of the covalent organic frameworks (COFs). The precise regulation for the number of carbonyl group and the ratio of hydrophilicity and hydrophobicity within pore channels was achieved by water adsorption sites engineering.

Amorphous MoS Anchored within Hollow Carbon as a Cathode Material for Magnesium-Ion Batteries.

Magnesium-ion batteries are considered the next-generation promising large-scale energy storage devices owing to the low-cost and nondendritic features of metallic Mg anode. Nevertheless, such strong electrostatic interaction between bivalent Mg and crystalline cathode materials will lead to low capacity and poor diffusion kinetics, which seriously hinders the further development of magnesium-ion batteries. Herein, amorphization and anion-rich strategies are employed to prepare well-designed cathode materials with MoS anchored on hollow carbon nanospheres (a-MoS/HCS).