POLYMER DEGRADATION AND STABILITY
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2026
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IF 8.1
Xingheng Qiu,Penglei Guo,Zhenzhen Song,Jian Wang,Qinglin Mu,Xiaoqing Liu
High-molecular-weight poly(ethylene oxalate) (HMW-PEOx) is an attractive seawater-degradable polyester with high-barrier potential. However, its synthesis efficiency is limited by the generation and subsequent distillation of 1,4-dioxane-2,3‑dione during two-step polymerization, and its high crystallinity also leads to poor toughness, which restricts practical use. Here, we report a low-loading, antimony-free assisting strategy based on carboxyl-functionalized Ti 3 C 2 T x MXene for the melt synthesis of PEOx and PEOx-derived copolyesters with enhanced oxalate-unit retention. With only 300 ppm of MXene–COOH, PEOx achieved 78.9% oxalate utilization and M w of 87 kDa. This strategy was further extended to a series of PEOx copolyesters derived from primary diols of varying chain lengths, affording consistently high utilizations of 76.7–82.9%. Among them, PEH 15 Ox (H = 1,6-hexanediol) struck an optimal balance of tensile strength (∼28 MPa), elongation at break (209%), and barrier performance, exhibiting improvement factors of 32.7 (O 2 ), 81.8 (CO 2 ), and 37.5 (water vapor) relative to PBAT. Spectroscopic, microscopic, and DFT results suggest that carboxylated MXene interfaces contribute to improved oxalate retention by strengthening polymer–surface interactions and raising the energetic penalty for cyclic byproduct formation. This work provides a material-efficient Sb-free route to high-barrier degradable oxalate copolyesters.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Mingcheng Wang,Yuqi Zhang,Xingang Feng,Yingxin Gao,Xiaobo Zhu,Zizhuo Wang,Kun Dai,Jin Wu,Pengbo Wan
Wearable electronics exhibit revolutionary prospects in real-time personalized motion tracking and intelligent human-machine interfacing. However, the development of wearable electronics capable of sensing across a broad pressure range with rapid responsiveness and long-term reliability remains a formidable challenge. Herein, inspired by tactile sensing enabled by the gradient moduli structure of human skin, a gradient-moduli healable waterborne polyurethane (H-WPU)/MXene elastomer nanocomposite was fabricated through solvent evaporation-induced gradient sedimentation of the assembly of H-WPU emulsion particles and conducting MXene nanosheets, and subsequent H-WPU emulsion particles' polymer chain interdiffusion. The healable gradient-moduli H-WPU/MXene elastomer nanocomposite demonstrates excellent mechanical and self-healing performance, including a high tensile strength, an exceptional strain, and a remarkable healing efficiency. When the gradient-moduli elastomer nanocomposite is integrated with the interdigitated electrode, the as-fabricated flexible sensor exhibits an ultrabroad sensing range up to 1250 kPa, rapid response/recovery times (10/8 ms), and outstanding durability over 100,000 loading/unloading cycles. In addition to the high-pressure motion monitoring, the sensor enables precise capture of subtle physiological signals (radial artery pulse, jugular venous pulse, respiration), and when coupled with machine learning, 99.7% accuracy in American Sign Language recognition is achieved, highlighting its promising applicability in intelligent human-machine interface and personalized health monitoring.
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ANALYTICAL LETTERS
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2026
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IF 1.8
Sumin Xu,Jiajia Zhang,Jianying Qu
Se@Ti3C2/CNs nanocomposites were successfully prepared through combining Ti3C2 MXene with ZIF-8-derived nitrogen-doped carbon materials (CNs) and employing a selenization strategy. The morphology and structural information of the material were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Electrochemical investigation showed that this material exhibited outstanding electrocatalytic performance to acetaminophen (AP) and p-aminophenol (4-AP) and could detect them simultaneously in wider linear ranges of 0.10–400.00 μM and 0.10–330.00 μM respectively with detection limits of 45.7 and 46.0 nM, respectively. Analysis of water samples and artificial urine shows that the sensor based on this material provides satisfactory results for AP and 4-AP with satisfactory selectivity (current change is less than 5% of the initial value) and stability (current retains above 95% of its initial response after 10 days of storage), which offers potential applications in drug analysis and environmental monitoring.
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INORGANIC CHEMISTRY
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2026
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IF 4.6
Yupeng Feng,Xue Chen,Feng Sun,Tianhao Zhao,Qi Liu,Zhi He,Yajie Hu,Xin Zhang,Jinyu Tian,Yifan Deng,Baihai Li,Liujun Cao,Fei Li,Jianping Long,Anjun Hu
Rechargeable aqueous aluminum-ion batteries (AAIBs) hold great promise for grid-scale energy storage, yet they lack stable anodes, especially when high-capacity aluminum powder is used (Al-p). Herein, we propose a core–shell structured MXene@Al composite anode to address these challenges. The composite is fabricated by uniformly encapsulating Al-p with conductive Ti3C2Tx MXene through mechanical ball milling and is then integrated into a self-supporting electrode on a zinc foam substrate. The MXene shell effectively prevents Al-p aggregation, constructs a continuous dual-electron–ion conductive network, and provides ample sites for Al3+ accommodation. Electrochemical tests reveal that the MXene@Al symmetric battery achieves a cycle life of 600 h with an overpotential of less than 40 mV at 0.1 mA cm–2. The MXene@Al∥Cu half-cell demonstrates a Coulombic efficiency of 98.93% after 300 cycles, and the full cell with MnO2 as the positive electrode maintains a capacity retention rate of 97.6% after 250 cycles at 0.2 A g–1. Theoretical simulations further reveal that the strong charge accumulation at the MXene–Al interface and the enhanced orbital hybridization improve the interface stability. Meanwhile, finite element analysis confirms that the MXene coating homogenizes the electric field and mechanical stress distribution, thereby effectively suppressing dendrite initiation and propagation. This work provides a scalable strategy toward practical high-performance AAIBs.
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高影响因子
JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Enxiang Zhou,Lijun Zhou,Yan Jin,Siyu Cai,Maxim Sychov,Yi Wang,Xihong Lu
Nickel/cobalt-based materials have attracted significant interest as cathode materials for aqueous alkaline Zn batteries (AAZBs) due to their high theoretical capacity and natural abundance. However, their practical application is hindered by unsatisfied discharge capacity and poor cycling stability, primarily caused by insufficient active sites and sluggish reaction kinetics. Herein, an effective approach is demonstrated to achieve high-efficiency and stable cathode for AAZBs by anchoring the NiCo 2 S 4 /Co 9 S 8 heterostructures on MXene nanosheets (NCS/CS@MXene), accompanied with morphological optimization. The introduced MXene significantly increases the effective active area and electrical conductivity of the composite. Consequently, the NCS/CS@MXene//Zn battery delivers a high areal capacity of 1.01 mAh cm −2 at 2 mA cm −2 , excellent cycling stability of 2500 cycles with only 0.00416% of capacity degradation per cycle, and nearly 100% coulombic efficiency.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Ziyang Fan,Jianpeng Wu,Wei Yang,Xinyi Wang,Shuai Liu,Yue Yao,Xinglong Gong,Ken Cham-Fai Leung,Shouhu Xuan
A hierarchical gradient-structured Leather/Aerogel/MXene (LAM) composite is fabricated. • Facile fabrication with tailorable and scalable manufacturing potential. • Impact force absorption of 80% and impact energy dissipation of ~98%. • Features thermal insulation, Joule heating, and real-time impact monitoring. • Intelligent marching blanket shows great potential for extreme environment protection. Mechanical impacts and drastic temperature fluctuations pose escalating threats to human operations in extreme environments, driving an urgent need for advanced personal protective materials that integrate superior impact resistance and efficient thermal regulation capabilities. Herein, a Leather/Aerogel/MXene (LAM) composite with hierarchical gradient porous structure is fabricated via in-situ freeze-casting of aramid nanofiber (ANF) aerogel on a natural leather skeleton combined with spray-coating of conductive MXene nanosheets. Interfacial hydrogen bonding and multiscale fiber bridging between the leather matrix and ANF nanofibers enable stable heterogeneous integration and effective interfacial stress transfer. Benefiting from this rational structural design, the LAM composite achieves excellent mechanical and thermal insulation properties. In comparison to pure ANF aerogel, the LAM shows significantly enhanced tensile and puncture resistance performance. Notably, the LAM shows high impact force dissipation rate of 80% ± 3% and impact energy dissipation rate of approximately 98% ± 1% under low-velocity impact of 10 cm drop height. Meanwhile, the abundant internal porous structure of the LAM efficiently suppresses gas convection and reduce thermal radiation transmittance, exhibiting excellent temperature isolation effect in both high and low temperature environments. The continuous MXene conductive network further endows the LAM with voltage-tunable Joule heating performance for active thermal management. Finally, detachable intelligent marching blankets and intelligent waist supports are designed, integrating thermo-mechanical protection, active thermotherapy, and impact monitoring functions. This work provides a feasible structural design strategy for multifunctional integrated protective materials, showing promising application potential in personal protection under extreme environments. Download: Download high-res image (176KB) Download: Download full-size image
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Nanoscale
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2025
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IF 5.1
Hong Wang,Xin Yang,Tong Zhu,Xiao Su,Liang Xiao,Qianqian Yu,Pingan Liu,LinGe Wang
The integration of electromagnetic wave absorption, antibacterial functionality, and environmental remediation into a single composite material remains a formidable challenge due to conflicting material property requirements. To address this, we fabricate plasmonic MXene/Au@Ag core–shell nanocomposites via in situ reduction, leveraging the synergistic effects of bimetallic architecture and MXene's tunable surface chemistry. The Au@Ag core–shell nanoparticles enhance interfacial polarization and plasmonic resonance, enabling ultra-broadband absorption (7.6 GHz effective absorption bandwidth) with a minimum reflection loss of −42.93 dB at 2.8 mm thickness, alongside a 42.9 dB m2 radar cross-section reduction. Concurrently, the composite exhibits >95% antibacterial efficiency via Ag+ release and light-triggered ROS generation, alongside >90% adsorption capacity for organic pollutants through MXene's functionalized surface. By unifying electromagnetic stealth, antimicrobial action, and environmental remediation, this work establishes a versatile platform for next-generation composites in aerospace, biomedical, and environmental engineering.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Chenxi Li,Mai Li,Xiang Peng,Inaam Ullah,Haotian Hu,Jiayi Shen,Ayesha Irfan,Wendong Xu,Paul K. Chu
Two-dimensional MXenes, with their accordion-like morphology and facile exfoliation into monolayers, offer an ideal platform for immobilizing electroactive materials. However, composites fabricated from MXenes through conventional methods exhibit inhomogeneous dispersion, sluggish charge redistribution, and poor interfacial coupling, limiting their potassium-ion storage performance. Herein, an interlayer-engineered CoGa-LDH/MXene heterostructure is fabricated via Peltier effect-driven rotational hydrothermal synthesis with tunable Co/Ga ratios. This approach ensures atomic-level confinement of layered double hydroxide (LDH) within MXene interlayers while strengthening interfacial coupling and ion transport kinetics. The resulting heteroarchitecture synergizes the high pseudocapacitance of CoGa-LDH and the metallic conductivity of MXene, enabling ultrafast ion/electron transport and suppressing self-aggregation. Optimized Co 1 Ga 1 -LDH/MXene delivers a remarkable specific capacitance of 1345.3 F/g and exceptional cyclability (85.13 % retention after 6000 cycles), surpassing most reported LDH-based supercapacitors. Density functional theory (DFT) calculations reveal that the heterointerface enhances K + -ion adsorption energy and modulates charge distribution, accelerating redox kinetics. When the Co 1 Ga 1 -LDH/MXene composite is assembled into an asymmetric supercapacitor (ASC), the device achieves an energy density of 77.4 Wh/kg at 1125 W/kg, with sustained performance under rigorous cycling. This work elucidates the confinement engineering of MXene-based compounds and their potassium storage mechanisms, providing critical references for high-energy-density supercapacitors in alkaline systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Ruihua Chen,Hao Deng,Junpeng Jiang,Daoyang Han,Gang Shao,Hailong Wang,Rui Zhang,Chao Ma
To overcome the problem of insufficient molybdenum adsorption capacity of commercially utilized alumina in 99 Mo/ 99m Tc generator, UiO-66(Ce)@MXene composites as potential molybdenum adsorbents were successfully prepared via in-situ growth method in this work. The adsorption performance and adsorption mechanism were investigated. The results indicate that the UM3 possesses superlative adsorption behavior compared to the other two samples. The adsorption kinetics are well described by the quasi-second-order model and the adsorption reaches equilibrium within 30 min. The adsorption isotherm can be well fitted with the Langmuir model, displaying the maximum molybdenum adsorption capacity of 833 mg/g at pH 3, superior to other reported adsorbents. The adsorption capacity manifests that polymolybdates are captured by the hydroxyl groups on MXene through hydrogen bonds. The monomolybdates can diffuse into micropores and are adsorbed on adsorption sites, e.g. missing-linker defects and Ce-OH groups. Consequently, the constructed hierarchical frameworks promote molybdenum adsorption and increase adsorption capacity significantly. The unrivalled adsorption performance of UiO-66(Ce)@MXene composites as molybdenum adsorbents have promising potential for the application in 99 Mo/ 99m Tc generator.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Jiawei Deng,Sai Teng,Dan Li,Jiren Yuan,Feigao Xu
In this study, novel magnetic Fe 3 S 4 /Ti 3 C 2 MXene composites were successfully synthesized via a hydrothermal method and employed as a highly efficient photo-Fenton catalyst for the degradation of tetracycline hydrochloride (TCH). The optimized composite (Fe 1 M 0.5 ), with a Fe 3 S 4 : Ti 3 C 2 MXene mass ratio of 1:0.5, exhibited exceptional catalytic performance under visible light, achieving a TCH removal efficiency of 93.9 % within 90 min (pH = 4.2, 10 mM H 2 O 2 , 0.3 g L −1 catalyst). The introduction of Ti 3 C 2 MXene significantly mitigated Fe 3 S 4 agglomeration, enhanced charge carrier separation, and broadened the operational pH range (2.2–7.2). Mechanistic studies revealed that the TCH degradation process was dominated by the synergistic effects of •OH, •O 2 − , h + , and e − dominated, which were facilitated by the Fe 3+ /Fe 2+ and Ti 4+ /Ti 3+ redox cycles as well as the formation of Schottky heterojunction. The composite demonstrated robust stability (>80 % TCH degradation efficiency after five cycles) and versatility in degrading diverse pollutants (e.g., RhB, MB). Magnetic characterization confirmed its easy recovery (10 emu g −1 saturation magnetization), and interference tests indicated a high tolerance to common inorganic anions (e.g., Cl − , SO 4 2− , NO 3 − ). This work highlights the potential of Fe 3 S 4 /Ti 3 C 2 MXene composites as sustainable, multifunctional catalysts for environmental remediation, offering insights into the design of MXene-based hybrid systems for advanced oxidation processes.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Chunlin Chen,Xinyu Bai,Guoqing Xiao,Fei Zhong,Beibei Ren,Guirong Zhao,Chunyan Chen,Chuanlin Mou
This study in situ encapsulated hexachlorotriphosphonyl cyanide (HCCP) within the pore structure of UiO-66 to prepare zirconium-based metal-organic framework material (UHP) with high nitrogen and phosphorus content. Subsequently, using gradient assembly technology, a transition metal-based borate flame retardant layer (Co-Ni/B) and a polyethyleneimine (PEI) layer were sequentially constructed on the UHP surface. Afterwards, the UHP/Co/Ni-B composite was combined with MXene via electrostatic interactions, ultimately yielding a novel multilevel flame retardant material (MX@UHPB/PEI). Experimental results demonstrated that the MX@UHPB/PEI-containing sample exhibited the lowest backside temperature (163.4 ℃) and highest expansion characteristics (27.2 mm, 20.76), confirming its effective ability to block heat propagation. Furthermore, the MX@UHPB/PEI/EP sample exhibited the highest residual char content (31.1%) and the most intact, dense char layer. This is attributed to transition metals such as titanium, zirconium, cobalt, and nickel within the material catalyzing the conversion of more pyrolyzed small molecules into stable char under high-temperature conditions. Notably, the formation of this catalytic char layer suppressed further decomposition of intermediates during combustion, enabling the MX@UHPB/PEI/EP sample to achieve the lowest smoke density rating (36.4%). The development of this multifunctional composite flame retardant offers a novel approach to enhancing the protective performance of water-based epoxy intumescent fireproof coatings.
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Materials Today Chemistry
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2025
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IF 6.7
Wenjie Wang,Shiyi Xing,Ping Lin,Lin Du,Qi Chen,Wei Sun
Ultrathin and lightweight electromagnetic interference (EMI) shielding materials tailored for microminiaturized electronic devices have become an urgent necessity. Porous polymeric composites incorporated with conductive fillers could be a promising candidate to meet such challenge. In the current study, pore-formation technique based on the inverse emulsion - breath figure process was utilized to shape highly porous polymeric coating with multi-layered arrays of micro-pores, uniformly embedded with Ti 3 C 2 T x MXene. By tuning the influential parameters, including MXene content, coating thickness, and pore sizes, an EMI shielding effectiveness value of 38 dB could be obtained from the composite coating. The 3D conductive pathways shaped by the Ti 3 C 2 T x flakes and the existence of the multiple interfaces within the multi-layered porous matrix of the polymer-MXene coatings (PMCs) were assumed to establish the fine EMI shielding performance. The PMC was further coated onto the circuit board and proven to function well as an ultra-thin EMI shielding layer attached to the microminiaturized electronic devices. In-situ metallic reduction induced by the MXene with inherent reducibility was utilized to further enrich the porous matrix of PMCs with Ag nanoparticles, generating Ag-decorated PMCs (Ag-PMCs). The fabricated Ag-PMC with thickness of only 240 μm demonstrated superior EMI shielding performance of an EMI SE value of 70.32 dB and a SSE/t value of 8775 dB cm 2 g −1 . This work sheds light on designing the ultrathin porous coating as EMI shielding materials for cutting-edge electronic devices.
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