ELECTROCHIMICA ACTA
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2026
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IF 5.8
Bofei Zhang,Baozhong Zhang,Boxu Chen,Kunfeng Zhang,Yiming Wang,Hanyu Chen,Baoshan He
A ratiometric electrochemical aptasensor was developed for ultrasensitive PFOA detection. • Fc-PtPd@HOF-101 served as the sensing platform and Au@MXene as the signal label. • The sensor achieves an ultralow detection limit of 6.04 fg/mL with excellent linearity from 10 fg/mL to 10 ng/mL. • Fc and MB signals provided self-calibration, improving accuracy and reproducibility. • Validated in real samples: tap, landscape, and PTFE-cooked water from Zhengzhou. Perfluorooctanoic acid (PFOA), as the most representative perfluorinated compound, is a persistent organic pollutant with exceptional chemical stability and resistance to natural degradation. Traditional detection methods, which rely on sophisticated instrumentation, exhibit limited sensitivity and often struggle to meet the requirements for trace-level analysis. In this study, a ratiometric electrochemical aptasensor was developed based on a ferrocene and hydrogen-bonded organic framework co-modified gold electrode (Fc-PtPd@HOF-101) combined with an Au@MXene signal tag, achieving ultrasensitive PFOA detection in water. The sensor utilizes an Fc internal reference and MB response indicator, with DPV detection. Au@MXene/cDNA/MB probe was constructed. In the presence of target PFOA, the sensor forms a stable Apt-PFOA complex, triggering the displacement of complementary DNA and the subsequent release of the signal probe, leading to a decrease in MB signal. The large specific surface area of Au@MXene enables high loading of cDNA and MB, significantly amplifying the signal while Fc remains stable. A ratiometric aptasensor was established using the current ratio I MB /I Fc . Under optimized conditions, the sensor exhibited a linear range of 10.0 fg mL -1 to 10.0 ng mL -1 and a low detection limit of 6.04 fg mL -1 , with outstanding selectivity, reproducibility, and stability. This study provides a novel technical approach for the rapid and sensitive detection of trace PFOA in environmental water samples. Download: Download high-res image (203KB) Download: Download full-size image
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2026
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IF 5.2
Yanpeng Zhang,Pinru Wang,Maoshu Yin,Yilong Duan,Taojin Chen,Mengmeng Lun,Min Sun,Lijie Sun,Nantao Hu,Liying Jiang,Zijiong Li,Bin Li
With the rapid development of wearable electronics, the key challenge of existing flexible energy storage devices is their low energy density, limited cycling ability, and safety concerns associated with carbon cathode materials and conventional electrolyte systems. In this paper, we present a strategy in which the MXene nanosheets and nitrogen-doped graphene (N-RGO/MXene) heterostructure are employed to assemble a flexible zinc-ion asymmetric supercapacitor (FZASC) using Zn(CF 3 SO 3 ) 2 /PVA as gel electrolyte. The MXene/N-RGO heterostructure composite forms a three-dimensional (3D) conductive network that facilitates the rapid deposition and transport of Zn 2+ . The quasi-solid-state FZASC with N-RGO/MXene heterostructure anode exhibits the highest capacitance of 133.53 F g −1 at 0.2 A g −1 , average energy density of 36.35 Wh kg −1 , and a power density of 140 W kg −1 , respectively. Notably, the prepared flexible FZASC exhibits a capacity retention of 84.67% after 10000 cycles at 6 A g −1 , with a coulombic efficiency approaching 100% and excellent mechanical flexibility under different bending angles and bending cycles. Moreover, the quasi-solid-state FZASC can keep an LED light illuminated for several minutes. The design strategy and performance metrics provide guidance for next-generation, flexible, and safe quasi-solid-state FASCs with high performance and long-duration stability, exhibiting great potential in energy-storage applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Chenlong Wang,Yifan Zu,Jun Natsuki,Jing Xu,Xueting Zhai,Chenhong Lang,Xiaojuan Li,Toshiaki Natsuki,Wenqi Nie
Hydrated vanadium pentoxide (VOH) is regarded as a promising cathode material for aqueous zinc-ion batteries (AZIBs) owing to its open layered framework and multivalent redox chemistry. However, its practical application is limited by sluggish charge-transfer kinetics and structural instability during repeated Zn²⁺/H⁺ insertion and extraction. Herein, an integrated AgNP@MX-VOH composite cathode is constructed by coupling VOH nanorods with Ag nanoparticle-decorated Ti₃C₂Tₓ MXene. The flexible MXene sheets provide continuous electron-transport pathways and bridge neighboring VOH nanostructures, while the dispersed AgNPs act as local conductive contact nodes and regulate the stacking configuration of the MXene assembly. This hierarchical interfacial network helps suppress MXene restacking, maintain accessible porous regions, and improve the structural and electrical stability of the conductive framework. Meanwhile, the formation of the AgNP@MX-VOH heterointerface modifies the local electronic environment of VOH, accompanied by an increased V⁴⁺ contribution and enhanced oxygen-defect-related features.These structural and interfacial effects facilitate charge transfer and reversible ion-storage kinetics while maintaining electrode integrity during cycling. Consequently, the AgNP@MX-VOH cathode delivers a high reversible capacity of 361.2 mAh g⁻¹ at 0.5 A g⁻¹ , a capacity of 268.96 mAh g⁻¹ at 5 A g⁻¹ , and 90.2% capacity retention after 1000 cycles at 5 A g⁻¹ . This work provides an interfacial-engineering strategy for constructing stable MXene/vanadium-oxide heterostructures toward durable aqueous zinc-ion storage.
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Small
·
2026
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IF 11.8
Xuewen Xia,Fuqian Wang,Nannan Zhang,Li Tao,Xin Yuan,Xueqiang Zhang,Zhenqiang Jiang,Shujuan Wang,Xing Yu,Zhongya Pang,Guangshi Li,Xionggang Lu,Xingli Zou
Metal vacancies in MXene catalysts are beneficial for modulating electronic structures and enhancing metal-support interactions for single-atom (SA) immobilization, but controlling their concentration and understanding their synergy with SAs remains challenging. Here, we develop a two-step electrochemical etching strategy in a deep eutectic solvent to create tunable Ti vacancies within MXene (Ti V -Ti 3- x C 2 T y ) and confine Pt single atoms (Pt SA -Ti V -Ti 3- x C 2 T y ). The vacancy concentration is precisely controlled, and the dynamic etching-deposition process prevents Pt SAs aggregation. The resulting catalyst with only Pt content of 0.57 wt.% exhibits excellent alkaline hydrogen evolution reaction (HER) performance: an overpotential of 31 mV at 10 mA cm −2 , a turnover frequency of 12.22 H 2 s −1 , and a mass activity of 11.95 A mg Pt −1 at 100 mV, outperforming commercial Pt/C. The coexistence of Pt SAs and adjacent Ti vacancies synergistically tunes the local electronic structure of Pt sites and modulates metal-support bonding, lowering the water dissociation barrier and optimizing hydrogen adsorption energy to boost alkaline HER. This work offers a controllable strategy for engineering metal vacancies in MXenes for efficient single-atom catalysts and establishes a platform for investigating vacancy-SA synergistic mechanisms.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Bingxue Huang,Shu Wu,Junjing Liu,Jie Liu,Biyou Peng,Zehang Zhou
MXenes have emerged as a highly promising material for next-generation patterned flexible sensing devices owing to their exceptional electrical conductivity, biosafety, and processability. In this study, we present a facile polyelectrolyte-assisted aerosol jet printing (AJP) strategy for fabricating MXene-based flexible sensors with largely improved printing quality for the applications in humidity and temperature sensing. By leveraging the electrostatic interactions network between sodium alginate (SA)-modified MXene ink and a chitosan (CS) substrate, the sensor achieves densely and stably packed MXene nanosheets with minimized defects. The intercalated SA molecules not only improve printing quality of AJP, but also enhance the humidity and temperature sensitivity of the MXene/SA patterns by modulating the interlayer spacing and functional groups within MXene layers. The resulting MXene/SA@CS sensor achieves a temperature coefficient of resistance (TCR) of 1.08% °C −1 (30–110 °C) and exhibits real-time responses to humidity changes from human motions with the largest 356 ± 9% resistance response rate and the shortest rapid response/recovery times (0.30 s/2.00 s). Its excellent antimicrobial properties and biocompatibility highlight the potential for wearable health monitoring and human-machine interfaces. Finally, the AJP-printed MXene sensors with programmable structures were successfully applied as a noncontact controller via finger movement detection.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Xu Zhang,Yuanhao Gong,Fei Xie,Ping Sun,Saihua Jiang
Dual-mode sensors capable of detecting multiple physical stimuli simultaneously offer significant advantages for advanced applications in human–machine interaction, robotics, and healthcare. However, the flammability of conventional materials limits their widespread adoption. The recently developed two-dimensional transition metal carbide (MXene) combines exceptional thermoelectric properties, metallic-like conductivity, and flame retardancy, making it a promising solution to these limitations. In this study, we present multifunctional sensors designed to accurately detect temperature and pressure stimuli by integrating MXene sheets onto flexible, fire-resistant polyimide (PI) substrates. These sensors demonstrate excellent performance in both temperature and pressure sensing, making them ideal for smart firefighting suits, which can monitor firefighters’ health in real time. Moreover, when integrated with deep-learning algorithms, the sensors, assembled into smart gloves, can recognize objects of varying weights and temperatures. This work provides a simple and effective method for preparing multifunctional wearable sensors capable of distinguishing multiple stimuli across diverse environments.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
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IF 14.3
Xinyue Liu,Zhongguo Zhao,Xin Xie,Kaiyuan Wang,Wenhu Li,Chouxuan Wang,Rong Xue,Lei Wang
Polymer-based thermal conductive composites (PTCs) are crucial for managing heat in microelectronics, yet the impact of filler–filler interfacial thermal resistance (ITR) on their thermal performance remains unclear despite efforts to optimize the filler–matrix interfaces. In this study, the creation of continuous thermal conductive networks with enhanced filler–filler interface contact was achieved in bacterial cellulose/boron nitride nanosheets/MXene composites (BC/BNNS/MXene) by the in-situ coating of silver nanoparticles on the surface of boron nitride nanosheets (Ag@BNNS). The homogeneously dispersed and well-exfoliated BNNS are bridged to each other via the Ag located at the surface of BNNS and a 3D thermal conductive network is formed with solid Ag junctions lying in among. The resulting 3D “branch-leaf” structure significantly enhances thermal conductivity to 18.5 W m −1 K −1 at 30 wt% Ag@BNNS filler loading, and was demonstrated by first-principles simulations, proving that the merged Ag was used as a thermal transport joint to reduce thermal contact resistance within the 3D BNNS and MXene network. Utilizing the MBAg30 composite film as a thermal interface material has been shown to effectively lower the operating temperature of smartphones, reducing it from 33.4°C to 29.0°C. The film also demonstrates efficient photothermal conversion, with a surface temperature of 83.6°C under 100 mW cm −2 light intensity and a photothermal conversion efficiency of 96.3 %. It demonstrates good stability after seven cycles and can increase ice melting rates in practical applications like agricultural greenhouses and solar heating. The present strategy provides an effective route for developing high-performance PTCs.
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Journal of Energy Storage
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2025
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IF 9.8
Wuyang Xiao,Lin Hu,Hui Xu,Yaru Pei,Qinggen Li,Zhong Yang
Silicon-based anodes offer high theoretical capacity for lithium-ion batteries but suffer from severe volume expansion during cycling, leading to structural degradation and capacity fade. This study presents a novel Si/SiO x @C@MXene composite to overcome these limitations through the synergistic confinement by the metal-organic-framework (MOF) derived carbon and MXene. The resulted Si/SiO x @C@MXene composite features a unique architecture where MOF-derived carbon-coated Si/SiO x nanospheres are embedded within or anchored onto the conductive MXene sheets, forming a robust three-dimensional sandwich-like structure. Electrochemical test reveal that Si/SiO x @C@MXene delivers a high initial discharge capacity of 1158.0 mAh g −1 at 100 mA g −1 , maintains 953.5 mAh g −1 after 1000 cycles at 1000 mA g −1 (84.9 % capacity retention), and exhibits excellent rate capability (543.9 mAh g −1 at 5000 mA g −1 ). This work highlights the effectiveness approach for developing high-performance, stable silicon-based anodes.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yuchun Ren,Dandan Zhao,Fei Zhou,Zhengjun Gong,Dongmei Wang,Yingwei Xi,Zhenglian Wu,Li Yang,Yongsheng Fu,Chen Fu
Lithium is a critical strategic resource in the transition to clean energy, and developing efficient, sustainable recycling technologies is essential to achieving carbon neutrality goals. The study addresses challenges such as low lithium-ion concentrations and the presence of competing cations in shale gas produced water (SGPW). An innovative composite adsorbent enhanced by a hydrogen bond network, consisting of H 1.33 Mn 1.67 O 4 (HMO), MXene, and chitosan (CTS), is introduced. Directional bonding among MXene, CTS, and HMO forms an interpenetrating structure that stabilizes the HMO lattice, with only 0.005 % Mn loss after ten cycles. Adsorption tests with actual SGPW demonstrated that the material adsorbs lithium-ion capacity at 11.80 mg/g, exhibiting higher lithium selectivity compared to other cations. A laboratory-scale experiment was conducted using a fixed-bed filtration system, the most effective adsorbent reached saturation close to 52 h under a near approach velocity of 0.13 cm/min (hydraulic loading) with a full bed volume of 7.7 cm 3 , containing around 4.92 g of adsorbent. A novel material design paradigm for lithium extraction from neutral to alkaline wastewater is presented, combining high selectivity with long cycle life.
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POLYMER
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2025
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IF 4.5
Shihang Dong,Shuohan Huang,Yuan Liang,Lingzhe Chen,Ying Wang,Yuhan Chen,Ke Ma,Xueqin Ju,Guanglei Xiang,Hai Wan,Wenbin Jin,Yanping Wang,Yong He,Peng Wei,Yumin Xia
MXenes, an emerging class of two-dimensional transition metal carbides and nitrides, have garnered significant attention due to their exceptional electrical, thermal, and mechanical properties. However, achieving uniform dispersion of hydrophilic MXene nanosheets within a hydrophobic thermotropic liquid crystal polyester (TLCP) matrix presents a formidable challenge that limits their practical applications. In this study, we address this challenge through a direct surface modification approach to enhance the interfacial interaction between MXene and TLCP. The effects of modified MXene on TLCP performance were investigated through comprehensive material characterization. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses reveal that 6-aminohexanoic acid effectively mediates the interfacial interaction between MXene and TLCP molecules, preventing the aggregation of MXene nanosheets and facilitating their uniform dispersion throughout the TLCP matrix. The incorporation of modified MXene (Am-MXene) significantly enhances the thermal stability of the resulting nanocomposites, with the Am-50%MXene/TLCP demonstrating a 27°C increase in the 5% weight loss temperature compared to pristine TLCP. The nanocomposite achieves a notable electrical conductivity of 5.99 S/m while preserving the TLCP's intrinsic microstructure. Moreover, MXene incorporation enhances the orderliness and alignment of liquid crystal textures. The nanocomposite exhibits substantial improvements in thermal diffusivity (67%), thermal conductivity (25%), dielectric constant (318%), and photothermal conversion temperature (84%). These findings advance our understanding of designing multifunctional composite materials with enhanced performance characteristics.
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COMPOSITES PART B-ENGINEERING
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2026
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IF 14
Hao-hao Song,Zi-cheng Tang,Zi-jie Huang,Qin Wang,De-xiang Sun,Jing-hui Yang,Xiao-dong Qi,Yong Wang
Lightweight multifunctional materials capable of mitigating electromagnetic interference (EMI) and infrared radiation are highly desirable for aerospace and military equipment. Conventional MXene aerogels still suffer from temperature rise under transient thermal shock due to their limited heat capacity and relatively high thermal diffusivity. Herein, phase change microcapsules (PCCs) with latent heat absorption capability were introduced into the MXene aerogel framework via ice-templated assembly. The MXene/PCC (MP) aerogels possess a three-dimensional (3D) porous structure with uniformly dispersed PCCs, achieving a low thermal conductivity of 0.0493 W m −1 K −1 . Moreover, the embedded PCCs actively absorb heat through solid-liquid phase transitions, thereby increasing heat capacity (28.38 J g −1 K −1 ) and suppressing thermal diffusivity (0.08 mm 2 s −1 ), effectively delaying heat propagation. By combining porous thermal insulation, phase‐change heat absorption, and low infrared emissivity of MXene, the MP aerogels markedly enhance resistance to transient thermal shock, maintaining a bottom-region temperature up to 9.67 °C lower than that of the MXene aerogel under 120 °C heating. Finally, the 3D conductive MXene network provides continuous electron pathways and interfaces for polarization and multiple reflections, while PCCs effectively absorb heat generated by electromagnetic losses, achieving reflection-dominated EMI shielding of 35.44 dB. By embedding PCCs into the framework of MXene aerogels, the simultaneous construction of a microporous structure and a phase-change skeleton endows the MXene aerogels with excellent infrared stealth and EMI shielding performance, thereby demonstrating their applicability in aerospace and defense fields.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2026
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IF 5.9
Leini Wang,Yinsong Guo,Chengtian Wei,Qiaoqiao Zhang,Ning Wei,Wei Zeng
Highly adaptable pressure sensors are gaining significant interest due to their potential applications in areas, such as artificial skin for wearables, health tracking, and human–machine interface. Here, a new strategy for the fabrication of a flexible wearable pressure sensor based on tissue paper coated with MXene/Bi is reported. Leveraging the inherent flexibility and 3D porous structure of cotton fabric, the sensor demonstrates exceptional performance with high sensitivity (2.73 kPa⁻¹ within 0–20 kPa), a wide detection range (0–1200 kPa), fast response/recovery times (210/100 ms), and long-term durability (3000 cycles). The developed sensor is versatile and suitable for diverse pressure detection, including finger pressing, wrist pulse monitoring, handwriting, and speech recognition. Importantly, tactile sensor array is also designed for the recognition of different tactile stimuli, showcasing significant potential for use in advanced sensor technologies and next-generation wearable electronics.
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