Journal of Materials Chemistry A
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2025
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IF 9.5
Qiancheng Liu,Changxia Liu,Xudong Wei,Junlong Sun,Xueye Chen
This study adopts an innovative strategy that combines laser-induced technology with chemical bonding to construct flexible MXene/LIG @laser (MLL) composite films with a ternary heterostructure of V2CTx-LIG-V2O5, which were assembled into a flexible triboelectric nanogenerator (MLL-TENG) with a single electrode structure. An open-circuit voltage (VOC) of 200.69V and short-circuit current (ISC) of 4.44μA were achieved using the MLL-TENG. System characterization showed that the MLL-TENG had excellent mechanical durability (>6000 cycles, decay rate of 2.8%), high sensitivity (22.64 V·N-1 at 0.1N), a fast response/recovery time (90/100ms), and environmental stability (20-80°C). MLL-TENG can be applied to human health monitoring and haptic sensing for continuous monitoring of joint flexural amplitude, laryngeal vibration frequency and gait behavior. Based on a quantitative analysis of the range of motion of human joints and the frequency of muscle group movement, a dynamic assessment of the physiological state of the participants can be performed. It provides low-cost detection solutions in scenarios such as the early warning of Parkinson’s disease and real-time monitoring of an athlete’s movement status. Its on-line and noninvasive monitoring capabilities are of great significance in disease prevention, rehabilitation, and healthcare.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tong Wu,Penggang Ren,Shoufeng Xue,Lunwu Wang,Zhengzheng Guo,Jiaqi Wang,Ze Zong,Wei Huang,Xin Hou,Fang Ren
Escalating demands for stealth protection and electromagnetic compatibility necessitate electromagnetic wave (EMW) absorbers with high-efficiency broadband attenuation and low-frequency extension, particularly under thin-layer constraints and low filler loading. We propose an integrated interface-pore design strategy for MXene-based absorbers to synchronously co-tune impedance matching and attenuation under thin-layer, low-loading constraints, by integrating dual-coupled heterointerfaces and hierarchical porosity. Specifically, an Fe/Mn bimetallic carboxylate MOF is pyrolyzed in situ to yield solid-solution nano-units embedded in defect-rich carbon. The tightly anchored FeO-MnO nanounits on the surface of delaminated MXene with hydrogen bonding and Ti-O-M (M = Fe/Mn) linkages form dual-coupled crystalline-amorphous-crystalline triphase heterointerfaces, thereby establishing interconnected hierarchical porosity and open transport pathways at nanosheet-particle contacts and within network voids. This interface-pore synergy optimizes the conductive network by maintaining intraflake continuity while tempering excessive conductivity, which broadens the impedance-matching band and strengthens incident-field coupling. Furthermore, the introduced tunable magnetic responses and abundant polarization-active sites effectively compensate for low-frequency loss. At a fixed filler loading of 5 wt%, the composite exhibits a minimum reflection loss (RL min ) of −72.2 dB at 3.38 GHz (S band), indicating excellent low-frequency attenuation. With a thickness of 1.16 mm, it provides an effective absorption bandwidth (EAB) of 4.64 GHz in the X/Ku bands. Furthermore, continuous low-frequency coverage exceeding 5.0 GHz across the S C bands is achieved by adjusting only five matching thicknesses. COMSOL multiphysics simulations demonstrate more uniform energy coupling and continuous volumetric dissipation. RCS calculations predict a main-lobe reduction of ≈ 32.5 dB for a metal-backed panel. This work proposes a transferable route to thin-layer, low-loading, broadband EMW absorption by integrating interface design with hierarchical porosity.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yang Liu,Zixin Lin,Yuetao Zhang,Xinyu Zhang,Zhiqi Li,Rubing Xiong,Chunxiao Long,Jiaqi Huang,Can Liu,Ziwei Zheng,Dan Li,Yongchang Ouyang,Lei Mou
In view of the need for real-time, multimodal respiratory health monitoring, we present a wearable sensor platform (BreathFIT) that simultaneously measures lactate and electromyography (EMG) signals for assessment of diaphragm function. By virtue of integrating liquid metal-polydimethylsiloxane (LM-PDMS) flexible sticky conductors for EMG acquisition with a lactate screen-printed electrode (LSPE), the platform enables concurrent measurement of muscle electrical activity and metabolic byproducts (lactate) from the diaphragm. Data are captured and visualized in real time via custom software, enabling machine learning models (LSTM, DNN, SVM, Random Forest) to classify diaphragm activity patterns during rest, exercise, and sleep. Owing to its integrated design, the system exhibits stable electrochemical performance, exceptional mechanical compliance (300 % stretchability), excellent skin conformality (39 N cm −1 adhesion strength), and high accuracy in distinguishing diaphragm states. Consequently, all models demonstrate high classification accuracy, with Random Forest proving the most effective at capturing time-series features (accuracy = 92.19 %). The dual-modality platform uniquely integrates electrical and biochemical sensing with intelligent analysis. This configuration enables high spatiotemporal-resolution monitoring of respiratory muscle activity. Consequently, the system opens a new avenue for wearable multimodal health monitoring, providing significant potential for both clinical and at-home respiratory health management.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Hongyu Xu,Jingjing Zhang,Xue Lu,Shijing Feng,Zigang Xu
In this study, a novel composite functional hydrogel was developed, integrating outstanding mechanical properties, remarkable catalytic activity, and highly sensitive sensing performance. Here, the dispersion behavior of Ti 3 C 2 T x (MXene) via ionic liquids was examined, focusing on the interplay between surface functional groups of MXene and IL. The study aims to elucidate the mechanisms governing dispersion stability. Subsequently, a novel Polyacrylamide(PAM)/Polyacrylic acid(PAA)/Chitosan/ionic liquid(IL)-MXene hydrogel was designed. PAM/PAA offers a 3D framework, multiple bonds such as hydrogen bonds and electrostatic interactions are formed with PAM/PAA and chitosan by IL-MXene, and the mechanical strength of the hydrogel is further enhanced. Meanwhile, the hydrogel is endowed with good electrical conductivity and sensing capabilities by MXene, which serves as a conductive filler. A strain of 2980 %, a tensile strength of 1050 kPa are displayed by the hydrogel. Simultaneously, it exhibits gauge factor (GF) of 13.6 and a rapid response time. Under eco-conscious waste management, the functional regeneration of waste hydrogels as adsorbents significantly enhances the sustainability of environmental remediation. pAAm/PAA/Chitosan/IL-MXene serves as a template for the synthesis of Au NPs, facilitating the reduction of 4-NP with a catalytic rate constant of 0.113 min -1 . This composite hydrogel exhibits remarkable mechanical properties and multiple functions. Under an eco-conscious waste management framework, the functional regeneration of waste hydrogels into high-performance adsorbents represents a significant advancement in sustainable environmental remediation. For instance, the discarded pAAm/PAA/Chitosan/IL-MXene hydrogel system serves as an effective template for the in situ synthesis of gold nanoparticles (Au NPs), demonstrating exceptional catalytic activity in the reduction of 4-nitrophenol (4-NP) with a rate constant of 0.113 min -1 . Beyond its catalytic efficiency, this composite hydrogel exhibits outstanding mechanical robustness and multifunctionality. In particular, the chitosan within the hydrogel matrix plays a significant role in enhancing antibacterial properties. Moreover, even after undergoing several catalytic cycles, it still maintains >90 % of its original state, indicating excellent cyclic stability and recyclability. Due to these outstanding characteristics, multifunctional hydrogel holds great promise for applications in the fields of flexible sensors and catalysis.
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PubMed
高影响因子
Catalysis Science & Technology
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2025
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IF 4.2
Dongfang Han,Li Niu,Yuangong Ma,Youlin Huang,Wen-Sheng Zhang
To utilize near-infrared (NIR) light within the solar energy spectrum, we have engineered an advanced composite of NaYF4:Yb3+,Tm3+@g-C3N4@WO3@MXene (denoted as NYT@g-C3N4@WO3@MXene) capable of absorbing NIR light to facilitate photocatalytic reactions. This environmentally benign system integrates semiconductor heterostructures (g-C3N4 and WO3) with upconversion nanoparticles (NaYF4:Yb3+,Tm3+, abbreviated as NYT) and Ti3C2 MXene nanosheets. Experimental validation demonstrated exceptional performance in antibiotic remediation, with the composite achieving 86.3% tetracycline decomposition over 12 hours under NIR irradiation through synergistic mechanisms, while also exhibiting good cycling stability. The enhanced photocatalytic activity arises from collaborative effects between upconversion luminescence, optimized charge transfer pathways within the heterojunction architecture, and the visible light absorption characteristics of MXene.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jie He,Jiahui Xiao,Qinxing Zhang,Tonghua Men,Yu Wang,Xiaofeng Wang,Bo Wang,Chuntai Liu,Changyu Shen,Wenjuan Han
Utilizing interfacial solar evaporator (ISE) to produce freshwater represents an effective solution to mitigate water scarcity. A key design strategy for improving evaporation efficiency in ISEs involves reducing the evaporation enthalpy of water. Herein, we prepared evaporation layers with varying channel sizes by controlling the cooling temperature, using chitosan and MXene as raw materials crosslinked with glutaraldehyde. These evaporation layers were combined with a chitosan monolith (CM) featuring a honeycomb-like porous structure as the water transport layer, resulting in the successful fabrication of a innovative double-layered interfacial solar evaporator (DISE) which possesses splendid thermal localization ability. The integration of the bilayer structure in DISE enables the evaporation layer to minimize water evaporation enthalpy, while maximizing evaporation efficiency and enhancing salt rejection. Among the samples, DMCML*-1 exhibited superior performance, attaining an evaporation rate of 3.01 kg m −2 h −1 under 1 kW m −2 simulated sunlight. It manifested excellent capabilities for seawater purification and wastewater recycling, maintaining stable evaporation rates over extended operational periods. This research not only provides an innovative method for the development of environmental, cost-effective, and high-efficiency ISEs but also addresses the challenge of balancing reduced evaporation enthalpy with enhanced water transport capacity, offering valuable insights for advancing the field.
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ACS Applied Nano Materials
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2025
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IF 5.5
Yuelin Lu,Jie Bai,Binbin Sun,Nannan Li,Cong Wang,Zhenhuai Yang,Qiang Wang
Currently, high-performance energy storage devices have requirements for electrode materials such as high power density, good stability, and high storage efficiency in various applications. The restacking of two-dimensional MXene nanosheets significantly impacts the performances of energy storage devices. Although three-dimensional (3D) electrode structures exhibit enhanced energy storage capacities, they possess poor stabilities and low storage efficiencies. These issues are addressed in the current study using a directional freeze-drying method and a one-step hydrothermal process to fabricate a nanoscale porous interconnected MXene/PVA (poly(vinyl alcohol))/rGO (reduced graphene oxide) composite aerogel electrode for supercapacitor applications. The rGO provides a stable conductive skeleton, while the hydrophilic PVA acts as a binder to strengthen the interactions between MXene and rGO, and contributes to the capacitance after carbonization. The resulting 3D composite aerogel increased the interlayer spacing of the Ti3C2Tx MXene, enabling efficient electrolyte penetration and ion transport. Due to the synergistic effect of the MXene pseudocapacitance and the rGO double-layer capacitance, the prepared aerogel exhibited a maximum specific capacitance of 489.7 F g–1 at a scan rate of 2 mV s–1. Furthermore, it demonstrated an excellent energy density of 30.2 W h kg–1 at a power density of 2040 W kg–1. After 10,000 charge/discharge cycles at a current density of 10 A g–1, the capacitance retention rate increased slightly to ∼103.85%, representing an excellent cyclic performance. This study offers an effective solution for MXene-based composite aerogel electrodes, meeting the demands of high-performance energy storage and guiding future material optimization.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Fengli Huang,Tong Zhang,Zhiheng Yu,Taiyao Pan,Tianyu Zhang,Hao Xue
Conductive hydrogel strain sensors with high stretchability, wide sensing range and high sensitivity have been extensively studied for their potential applications in wearable sensing devices. However, achieving high sensitivity in the low-strain range remains a challenge. In this study, the hydrogel was prepared by blending acrylamide, sodium alginate, and cellulose nanocrystals. The hydrogel substrate was fabricated using the electrohydrodynamic printing method, and hierarchical ultraviolet photopolymerization was employed to achieve effective bonding between the hydrogel substrate and MXene film. Further, the hydrogel composite substrate was pre-stretched to overcome the interfacial stress differences between the MXene film and hydrogel substrate, thereby completing the fabrication of a PAAM-SA 2% -CNCs 3% & MXene (PSC&M) sensor with the designed crack structure. The fabricated strain sensor significantly broadened the detection sensitivity of hydrogel sensors in the low-strain range (Strain: 0–5 %, GF = 23.4) and achieved fast response/recovery times (106 ms / 82 ms), obtaining excellent mechanical properties (0.33 MPa stress, 710 % elongation at break) and electrical conductivity (1.931 mS/cm). Application demonstrations based on the fabricated PSC&M sensors in various human motions, subtle vibration signal monitoring and hand-knuckle rehabilitation training, to show their potential applications in smart devices, e-skin and wearable medical rehabilitation devices.
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Science China-Materials
·
2025
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IF 7.4
Liu Congqi,Dong Jingyu,Cheng Hongli,He Chengen,Zhou Bing,Huang Ming,Liu Chuntai,Feng Yuezhan
MXene-based layered films show great promise for electromagnetic interference (EMI) shielding, yet maintaining highly ordered structures during large-scale production remains challenging. Herein, we present a facile centrifugal casting method for scalable fabrication of MXene/polyvinyl alcohol (MXene/PVA) films with highly oriented and compact layered structures. During centrifugal casting, the viscous fluid experiences strong shear and centrifugal forces along the tangential and normal directions, respectively, inducing compact and oriented arrangement of MXene nanosheets in the layered structure. Consequently, the Herman’s orientation factor of MXene in composite films shows a significant increase from 0.681 to 0.794 as the rotation rate rises from 0 to 4000 r/min. Accordingly, the tensile strength and toughness of the composite film increase from 55.2 to 191.1 MPa, and from ∼0.8 to 2.5 MJ/m 3 . More importantly, the highly oriented and compact layered structure with the ultrathin thickness (∼8 µm) enables a high absolute electromagnetic shielding effectiveness (SSE/ t ) of 21029 dB cm 2 /g. Moreover, the increased oriented arrangement of MXene in the layered structure can significantly reduce the infrared emissivity to 0.248, thus endowing the MXene/PVA film with excellent thermal camouflage capability. Therefore, this work presents a more effective strategy for constructing high-performance MXene-based layered films.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yihan Song,Xu Ren,Yue Xiao,Zhihao Xiong,Qi Wang,Bin Liu
The continuous development of the global marine industry has posed significant challenges to sustainable development due to corrosion in marine engineering structures. While rust converters are regarded as cost-effective solutions for corrosion mitigation, existing technological advancements fail to meet the heightened demands of contemporary marine engineering practices. To address these limitations, an MXene–phytic acid–gallic acid (M–P–G) hybrid composite was synthesized by integrating two-dimensional nanomaterial Ti3C2Tx with organic acids (gallic acid and phytic acid). This composite achieved synergistic enhancement in both rust-conversion capability and corrosion inhibition performance. Experimental results demonstrated that the M–P–G composite with a mass fraction of 1.0 wt % formed a dense rust-conversion layer on substrates, significantly improving protective performance. The M–P–G/epoxy (EP) coating exhibited an impedance modulus of 1.51 × 109 Ω cm2, surpassing conventional coatings by 2 orders of magnitude. Furthermore, through density functional theory calculations combined with scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared analyses, a corrosion protection mechanism was proposed. This mechanism elucidated the differential conversion capacities of the organic acids toward diverse corrosion products, providing critical insights for the rational design and evaluation of next-generation rust-conversion and anticorrosion materials.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Sen Zhang,Xingdong Yang,Feng Zhang,Jun-qin Qiao,Wei-juan Zheng,Hong-zhen Lian
Both MXenes and metal-organic frameworks (MOFs) have been attracting lots of attention since being found and have been applied in various fields. Furthermore, MXene-MOF composites have been recently studied to combine the advantages of MXenes and MOFs. However, the synthesis of MXene-MOF composites still suffers from questions such as low-efficiency of exfoliation of MXenes to layered nanosheets, uneven distribution of MOF nanoparticles on MXene nanosheets and extra modification process before the growth of MOF nanoparticles. To resolve these problems, herein, a sonication-assisted minimally intensive layer delamination (SA-MILD) method was proposed to achieve high yield of thin-layer Ti 3 C 2 T x MXene nanosheets. Then, a stirring in-situ growth method (SISG) was carried out to uniformly grow UiO-66–NH 2 nanoparticles on Ti 3 C 2 T x nanosheets to form two-dimensional potato-chip-like Ti 3 C 2 –UiO-66–NH 2 nanocomposites instead of conventional solvothermal method for the first time. Finally, MXene-MOF composites were calcined to increase the chemical stability and endowed with magnetism by the in-situ oxidation growth of Fe 3 O 4 nanoparticles. Thanks to the massively exposed Ti O, Zr O and Fe O sites, the well-characterized magnetic trimetallic oxides (MTMOs) could enrich phosphopeptides by easy magnetic separation through metal oxide affinity chromatography mechanism in a short time. High sensitivity (0.5 nmol∙L −1 of α −/ β -casein) and great anti-interference ability (1:1:2000 of the molar ratio of α −/ β -casein to bovine serum albumin) were realized for the efficient enrichment of phosphopeptides with MTMOs. Non-fat milk and traditional Chinese medicine injections were used as the examples to explore the biomedical applicability of the as-prepared MTMOs with excellent results.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yan Li,Han Zhang,Guo Qu,Lingying Xie,Sisi Tang,Hang Lei,Yuxia Zhong,Yue-Fei Zhang
A novel chitosan-based composite hydrogel (CS/PEI-MXene) made of polyethyleneimine and Ti 3 C 2 MXene as modifiers and acrolein as crosslinker has been synthesized simply and conveniently, which could be applied in the removal of residual antibiotic pharmaceuticals (chlortetracycline (CTC), ibuprofen (IBU), etc.) from aqueous environments. The CS/PEI-MXene was used as an adsorbent for chlortetracycline and ibuprofen. The removal rates of CTC and IBU could be achieved to 91.1 % and 99.25 %, respectively. In addition, the reusability of CS/PEI-MXene for CTC and IBU appeared good capacity, and the removal rate was maintained at approximately 70 % after five cycles. FT-IR, XPS, and zeta potential were used to show that the hydrogel was successfully synthesized, and its physicochemical characteristics were studied. Systematically examined were conducted on the effects of pH (3−10), contact time (0–120 min), and temperature (30–40 °C) on the adsorption efficiency of CS/PEI-MXene. The adsorption mechanism of CS/PEI-MXene on CTC and IBU mainly included electrostatic interactions and hydrogen bonding. Overall, the development of MXene based hydrogel adsorbent will provide a practical approach to the treatment of wastewater containing antibiotic pharmaceuticals and have great potential for practical applications.
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