Journal of Colloid and Interface Science最新文献

To cope with the demand for high-safe lithium-ion batteries, this study developed a new PVDF-HFP/LiTFSI/LATP/ZrO₂ (PHLZ) composite solid electrolyte with coral reef-type hierarchical channel structure. This electrolyte integrates the advantages of the NASICON fast ion conductor Li₁.₃Al₀.₃Ti₁.₇(PO₄)₃ (LATP) framework and the multifunctional inducer ZrO₂ through a dual-filler synergistic strategy. LATP large particles construct a continuous three-dimensional lithium ion rapid transmission main channel and promote LiTFSI dissociation through the surface Lewis acid site. ZrO₂ nanoparticles effectively passivate the LATP surface to inhibit reduction and improve their dispersion, and form hydrogen bonds with the -CF₂-group of PVDF-HFP through the surface hydroxyl group, trigger activation of the fast ion channel in the amorphous region of the polymer and inhibit crystallization. The PHLZ-2 electrolyte with an optimized ratio (LATP:ZrO₂ = 2:1) exhibits excellent comprehensive performance, with ion conductivity up to 1.76 × 10^-3 S cm^-1 at 60 °C, lithium ion migration number up to 0.76, wide electrochemical window (>4.74 V vs. Li⁺/Li), significantly improved thermal stability and flame retardant (3 s self-extinguishing), and excellent lithium deposition/peel stability. When applied to Fe₃O₄/phosphorus doped graphene oxide (FPG) anode system, the FPG//PHLZ-2//Li half-cell showed high rate performance (1101.65 mAh g^-1 at 3 A/g) and long cycle life (1225.19 mAh g^-1 after 300 times at 1.10 mA cm^-2); the assembled FPG//PHLZ-2//LFP full battery also showed high capacity and excellent cycle stability. This research provides new ideas for designing high-performance and safe composite solid electrolytes.

Manganese-based oxide cathode materials have attracted significant attention in aqueous zinc-ion batteries (AZIBs) due to their high energy density and operating voltage, but their practical applications are limited by the structural instability caused by manganese dissolution and sluggish kinetics resulting from poor electrical conductivity. Herein, a cauliflower-like MnO/carbon composite (NMOC) with hierarchical porous architecture is designed and fabricated through NaCl phase-dynamic regulation strategy by using a cost-effective manganese tartrate as the precursor. The dynamic NaCl template not only directs the self-assembly of MnO nanoparticles into three-dimensional interconnected porous frameworks but also facilitates the in-situ formation of an ultrathin (∼2 nm) carbon coating layer. As a high-performance cathode material for AZIBs, this unique structural configuration of NMOC establishes abundant Zn²⁺/H⁺ diffusion pathways, exposes high-density active sites, and significantly enhances reaction kinetics. Meanwhile, the strengthened Mn-O-C interfacial coupling and carbon confinement effect collectively suppress Mn dissolution, mitigate volume variation, and promote charge transfer dynamics. As a result, the NMOC cathode delivers an exceptional capacity of 561 mAh g^-1 at 0.2 A g^-1 and demonstrates ultra-stable cycling performance with 190 mAh g^-1 retained after 2000 cycles at 2 A g^-1 and nearly 100 % capacity retention (127 mAh g^-1) after 2500 cycles at 4 A g^-1. Furthermore, the constructed flexible cells demonstrated excellent mechanical and electrochemical properties. This work offers new insights into the interfacial modulation and kinetic optimization of manganese-based oxides in next-generation energy storage systems.

Supramolecular gels have been widely explored as functional materials; however, their performance often degrades upon solvent evaporation. Although many strategies seek to mitigate this instability, few have leveraged solvent loss as a functional driver. Herein, we present an aggregation-induced emission (AIE)-active supramolecular gel that exploits solvent evaporation for dynamic information encryption and anti-counterfeiting. In this multicomponent co-assembly, a phenylalanine-functionalized 1,3,5-benzenetricarboxamide derivative (C₃-Phe), sodium hyaluronate (HA), and Al³⁺ ions together immobilize the AIE luminogen 4,4'-(1,2-diphenylethene-1,2-diyl)dibenzoic acid (TPE-CA), enhancing its quantum yield from 1.91 % to 62.43 %. The introduction of fluorescent dyes 4,7-di(2-thienyl)-2,1,3-benzothiadiazole (DBT) and rhodamine B (RhB) further establishes a cascade Förster resonance energy transfer (FRET) platform to enable tunable multicolor emission. The controlled evaporation of water drives time-dependent fluorescence chromatic shifts and quenching, which are fully reversible upon water replenishment. This evaporation-coded reversible fluorescence behavior underpins a 4D encryption and anti-counterfeiting platform that features multistage authentication and self-erasing information, thereby offering a new paradigm for adaptive smart materials.

Resistance to apoptosis-based cancer therapies severely limits treatment efficacy. Ferroptosis, a distinct form of regulated cell death driven by lipid peroxidation, offers a promising alternative to overcome such resistance. Herein, we developed an innovative microneedle patch system (CFA-MN) incorporating an oxygen vacancy-rich hollow CoSn(OH)₆/FeS₂ (CF) heterostructure, combined with the alkyl radical initiator 1,2-bis(2-(4,5-dihydro-1Himidazol-2-yl)propan-2-yl) diazene dihydrochloride, to achieve cooperative apoptosis-ferroptosis cancer therapy. The CF heterostructure, synthesized via alkaline etching and solvothermal methods, exhibited abundant oxygen vacancy, enhancing reactive oxygen species generation under 808 nm laser irradiation. In the tumor microenvironment, FeS₂ facilitated controlled H₂S release, inhibiting epithelial-mesenchymal transition and promoting apoptosis. Concurrently, Fe²⁺-mediated Fenton reactions led to lipid peroxide accumulation, triggering ferroptosis. The CFA-MN patch exhibited robust mechanical strength and rapid dissolution for precise delivery and controlled release. In vitro and in vivo results demonstrated significant tumor inhibition through combined apoptosis and ferroptosis pathways. This work highlights the potential of CFA-MN as a multifunctional platform to overcome chemoresistance and improve breast cancer treatment outcomes.

The rational design of bifunctional electrocatalysts that simultaneously exhibit exceptional catalytic activity and retain the inherent merits of metal-organic frameworks (MOFs) for overall water electrolysis still presents a critical scientific challenge. Herein, we demonstrate the construction of nanoflower-like heterostructures composed of NiFe-TDC and Ni₃S₂ (denoted as Ni₃S₂@NiFe-TDC) on nickel foam substrates through a simple and mild room-temperature sulfurization strategy, serving as highly active dual-functional electrocatalysts for overall freshwater and seawater splitting. The as-prepared Ni₃S₂@NiFe-TDC-60 achieves 10 mA cm^-2 current density with the overpotentials of 81 and 244 mV in alkaline solution for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Moreover, it also exhibits the remarkable catalytic performance in alkaline seawater, with HER and OER overpotentials as low as 98 and 267 mV at 10 mA cm^-2. Additionally, the assembled electrolysis cell with Ni₃S₂@NiFe-TDC-60 as both electrodes was able to operate continuously for at least 100 h at 10 mA cm^-2 with the voltages of 1.55 and 1.67 V in 1.0 M KOH and alkaline seawater, respectively, which demonstrated the excellent long-term durability. The outstanding catalytic activity of catalysts is attributed to the synergistic interplay between the heterointerface engineering and nanoflower-like architecture, which significantly boosts the catalytic efficiency, electrical conductivity and electron transfer kinetics. The paper offers innovative insights into rational engineering of MOF-derived bifunctional electrocatalysts through a rapid and facile synthetic strategy.

Utilizing the two-electron oxygen reduction reaction (2e^- ORR) for green hydrogen peroxide (H₂O₂) production offers a sustainable alternative to the traditional anthraquinone process. Metal-free carbon electrocatalysts have attracted significant attention due to their low cost and structural diversity. However, their advancement in 2e^- ORR has been severely hampered by the inefficient bulk production of H₂O₂. In this study, we report a dual-engineering strategy for enhancing H₂O₂ electroproduction by constructing a sulfur and oxygen (S, O) co-doped defective carbon electrocatalyst (HP-ACB). This HP-ACB electrocatalyst achieves a remarkable H₂O₂ kinetic current density of 184.3 A g^-1, a high Faradaic efficiency of 94 %, and enhanced H₂O₂ production reaching 8.21 mol g_cat^-1 h^-1. Experimental results with theoretical calculations demonstrate that the excellent electrocatalytic performance of HP-ACB in 2e^- ORR is attributed to the introduction of S, O atoms and defective carbon, which synergistically reduce the overpotential required for the adsorption of the key intermediate (OOH^⁎) on catalyst surface in 2e^- ORR. This research not only proposes a viable approach to enhancing the 2e^- ORR electrocatalytic activity of metal-free carbon materials but also highlights the importance of regulating the electronic structure of defective carbon in catalytic applications.

This study presents an effective approach to enhancing the catalytic performance, long-term stability, and surface hydrophilicity of porous nickel (Ni) substrates for the hydrogen evolution reaction (HER) via controlled surface oxidation without additional catalysts. In this study, the Ni tape-cast substrate (Ni-TCS), fabricated through a tape-casting method followed by oxidation and reduction treatments, exhibited a large surface area and fine porosity, resulting in a significantly improved catalytic activity compared to conventional Ni foam. Through partial oxidation at temperatures ranging from 300 °C to 450 °C, a catalytically favorable nickel oxide (NiO) nano layer was produced directly on the Ni-TCS surface, enhancing the HER activity and stabilizing the NiO/Ni interface for durability. Additionally, the NiO nano layer rendered the electrode surface hydrophilic as confirmed through contact angle measurements, facilitating effective electrolyte contact and improving mass transport. The Ni-TCS electrode oxidized at 400 °C (Ni-TCS400) demonstrated the highest HER activity, sustaining excellent stability at 500 mA cm^-2 over 500 h. Ni-TCS400 exhibited lower kinetic and mass-transfer overpotentials than those of the Ni-TCS in an alkaline water electrolyzer (AWE) system, while a voltage of 1.81 V was required to achieve a current density of 0.4 A cm^-2. Overall, the partial oxidation strategy circumvents the use of binders or precursors, while enabling improved stability, simplified fabrication, and high catalytic activity, making it a promising approach for the development of durable, efficient AWE electrodes.