IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Yixin Lu,Jun Sun,Wenqing Xu,Xinpeng Di,Wenchao Zhao,Long Zhang,Gebo Pan
Flexible, skin-like sensors are capable of converting various external stimuli into measurable electrical signals, crucial for advancing human-computer interaction and wearable health monitoring devices. Previous research on flexible smart sensing elements has primarily targeted single sensing functions, leaving the quest for integrated sensors capable of monitoring multiple signals largely unmet. In this paper, a signal-independent and interference-resistant pressure-temperature dual-mode sensor was fabricated by using a synergistic approach of structure and material design. A temperature-sensitive layer with a high temperature coefficient was prepared by introducing MOF-MXene into PU, and the dual-mode sensor was subsequently obtained by assembling it with S-MXene/PVDF composite as the encapsulating material and the pressure sensing layer. Fabric electrodes have small longitudinal dimensions as well as favorable compressibility and are well suited for the preparation of the miniature integrated sensor. Remarkably, the sensor demonstrates independent high-performance detection of both temperature and pressure signals. In terms of temperature sensing, the device has an average sensitivity of -3.6 %·°C
-1
and a resolution of 0.1 °C, which is better than most sensors based on thermally sensitive semiconductor materials. The sensor has excellent resistance to stress and pressure interference, which is promising for application in the detection of human physiological signals. While pressure sensing, the sensor has excellent overall performance, such as high sensitivity (1.02 kPa
-1
), skin-like rapid response time (40 ms), ultra-high cyclic stability (20,000 cycles). Benefiting from the smaller temperature coefficient of the dielectric composite material, the sensor is insensitive to temperature within the range of 20-50 °C.
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TRIBOLOGY LETTERS
·
2025
·Vol. 73
·期 4
·1-14
·
IF 3.3
Li Bingchun,Zhang Guoliang,Zheng Wenxuan,Yang Duo,Li Yang
Friction and lubrication of components in mechanical transmission systems are crucial to their transmission efficiency. As for the extreme conditions, the performance of traditional liquid lubricants would be degraded, which causes significant harm to the safe and reliable operation of equipment. Therefore, the development of a high-efficiency composite lubricant is particularly important. In this study, MXene@Triethanolamine borate nanocomposite were prepared via the ultrasonic intercalation method. Furthermore, the composites were characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The tribological properties of intercalated MXene@TB in the BMIMPF6 ionic liquid were evaluated under current using a ball-on-disk tribometer. The average friction coefficient of lubricant with 0.3% intercalated MXene@TB-1 was reduced by 9.8%, and its wear volume was also decreased by 36.1%. Additionally, the application of current can enhance the tribological performance of lubricant. Specifically, the wear volume of int- MXene@TB-2 was decreased by 52% due to the current-induced ion migration and lubricating film repair. Moreover, the application of current promotes the movement of nanoparticles within the ionic liquid, minimizing aggregation and further enhancing the formation of the lubrication film. The lubricant nanocomposite with high-efficiency friction reduction and anti-wear properties can be further applied in current-carrying friction field. Graphical abstract
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qinghao Song,Zhihao Huang,Ying Xiao,Yu Zhang,Liyi Li,Yi Yu,Si Chen,Qing Wu
MXene Ti 3 C 2 has emerged as a promising biosensing material due to the high surface area, excellent biocompatibility, tunable functional groups (-F, O, -OH), and outstanding electrical conductivity, effectively addressing issues such as low sensitivity and inadequate biocompatibility in sensors. This work, MXene Ti 3 C 2 -AuNPs are synthesized as functional materials through a one-step synthesis method. We propose the first all-fiber biosensor featuring a laterally offset SMF-MMF-SMF-MMF-SMF (SMSMS) interferometric structure functionalized with MXene Ti 3 C 2 -AuNPs as the substrate of the biosensor sensor device, for the detection of the alkane degradation (ALK) gene, to the best of our knowledge. The biosensor enables in-situ target DNA (tDNA) detection across 1 fM to 1 μM concentrations based on this nanoengineered interface, demonstrating 1755.95 nm/RIU sensitivity and a 1 fM limit of detection (LOD) – Two orders of magnitude lower than conventional optical DNA sensors (μM-level). The sensor exhibits a wavelength shift of 1.23 nm in response to complementary DNA, which is 8.2 times greater than that for non-complementary DNA, with a maximum wavelength shift error of 0.11 nm across three repeated experiments and a shift within 0.1 nm over 7 days for sensors with attached functional MXene Ti 3 C 2 , demonstrating excellent specificity, stability, and reproducibility. These advantages render the fiber optic device coated with MXene Ti 3 C 2 -AuNPs an effective solution for ALK gene monitoring and broaden its applicability for ultra-trace DNA detection in environmental and biomedical contexts
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Hongsheng Xu,Hankun Lv,Wenbin Ye,Yanbei Hou,Fukai Chu,Weizhao Hu,Lei Song,Yuan Hu
Low-pressure environments significantly compromise the performance of conventional intumescent flame-retardant systems by accelerating ignition and inducing excessive yet fragile char expansion, which easily cracks and compromises its protective function. To overcome these challenges, MXene has attracted considerable attention due to its ability to promote char layer formation and serve as an effective physical barrier. In this work, a novel flame-retardant PE composite was developed by incorporating a silane-coupling-agent-modified Al 2 O 3 -supported MXene nanohybrid (MXene@Al 2 O 3 ). The nanohybrid exhibited uniform morphology, strong interfacial bonding, and excellent dispersion within the PE matrix, significantly reducing the fire risk of PE under sub-atmospheric conditions. With only 1 wt% of MXene@Al 2 O 3 , the composite achieved a 26.9 % and 31.8 % reduction in peak heat release rate and total heat release, respectively, along with a 25.9 % decrease in maximum smoke density and significant suppression of carbon monoxide evolution. Under reduced pressures (55–99 kPa), the system formed more graphitized and compact char layers, demonstrating enhanced thermal stability and suppressed volatile release. Mechanistic insights obtained via synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS) revealed a shift from oxygen-driven oxidation to condensed-phase carbonization under low pressure. These improvements are attributed to the early char templating and barrier-forming capabilities of MXene, while Al 2 O 3 contributes by catalyzes carbonization reactions and suppresses smoke precursors. This work demonstrates a pressure-adaptive flame-retardant strategy for polyolefin materials and offers theoretical guidance for designing next-generation nanohybrid flame-retardant systems for sub-atmospheric pressure environments.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Dongxiao Liu,Zechen Yan,Jingyi Zhao,Daqian Zhuang,Yanrui Zhao,Xiaofang Li,Lei Zhu
Developing efficient hydrogel filtration membranes and eco-friendly sustainable water purification methods remain a global challenge. In this study, one convenient hydrogel filter system based on CNFs@MXene@ZnO (CMZ) has been constructed by the one-step injection approach. Herein, MXene nanosheets and ZnO nanoparticles are loaded onto a 3D interwoven CNFs skeleton, constructing a multifunctional superhydrophilic interface. The results demonstrate that the CMZ achieves exceptional separation efficiency (>98 %) and water flux (>1600 L·m⁻²·h⁻¹·bar −1 ) for oil/water emulsions, with notable suspended solids retention (>97.5 %) for oil/water/solid emulsions. The system versatility is further proven by the clean water production performance from complex natural environmental waters, including river water, sea water, and snowmelt. Notably, after the separation process, the CMZ system exhibits the significant photocatalytic properties to degrade the pollutants upon the membrane surface under ultraviolet light conditions. Moreover, when the CMZ reaches its service life, secondary contamination could be avoided by the biodegradation process of the fully bio-based CNFs, enabling the membrane to naturally degrade within 30 days. This study presents not only an eco-friendly and efficient water purification material for complex separation systems, but also a novel, convenient and outdoor water treatment device, advancing the technology for complex separation systems.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Weining Liu,Xi Tan,Mingyang Zhao,Zhao Liu,Hairong Li
Triethylamine (TEA) is a highly toxic and flammable volatile organic compound (VOC) that poses serious risks to both human health and environmental safety. Thus, the development of highly sensitive gas sensors for its trace-level detection is of pressing importance. In this work, SnO 2 /TiO 2 heterostructures were synthesized via an in-situ thermal transformation of Sn-MOF/MXene precursors. The derived materials benefit from the inherent high porosity and large specific surface area of MOF-based frameworks, as well as the tightly coupled heterointerface formed under the modulation of MXene, efficiently facilitating charge separation and transport, while TEA interacts more readily with active sites due to the richness of surface defects, thereby greatly boosting TEA adsorption and sensing response. The optimized MST-2 sensor exhibits an ultrahigh response of 3525.2 to 10 ppm TEA at a notably low operating temperature of 61 °C, along with excellent selectivity and good stability. Even at an ultralow TEA concentration of 10 ppb, the sensor maintains a strong response of 44.6. Furthermore, the adsorption characteristics of individual phases, interfacial charge transfer processes, and TEA adsorption enhanced mechanisms were systematically examined through density functional theory (DFT) calculations. The effective MOF/MXene-derived co-construction strategy offers a promising avenue for designing advanced TEA sensing materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yang Yang,Jun Li,Siyu Huang,Qiu Zhang,Xueyue Lyu,Liying Pan,Jiawei Qi,Xinrui Wang,Guangdong Zhao
The rapid advancement of electronic information technology, coupled with the extensive implementation of 5G communication technology, has exacerbated the issue of electromagnetic pollution. Consequently, there is an urgent demand for a wave-absorbing materials that exhibit robust absorption performance, a broad absorption bandwidth, and minimal matching thickness to ameliorate the environmental impact. This study presents the preparation of a novel SiCTi/MXene ceramic aerogel, utilizing SiCTi ceramics as the primary material, polyvinyl alcohol as the C-skeleton, SiCnw and MXene as the reinforcing phase. The synthesis was achieved through the ice template method in conjunction with freeze-drying technique. The resulting composite ceramic aerogel features a biomimetic spider web structure and a layered petal configuration, while simultaneously demonstrating exceptional mechanical properties and electromagnetic absorption capabilities. Notably, when the mass ratio of SiCTi ceramics to MXene is 1:1, the composite ceramic aerogel achieves a minimum reflection of 64.20 dB, indicating an electromagnetic wave absorption efficiency of 99.9999 %. At a thickness of 1.5 mm, the sample exhibits a maximum effective absorption bandwidth of 4.57 GHz, thereby facilitating broadband absorption of electromagnetic waves. The successful synthesis of the SiCTi/MXene composite ceramic aerogel offers valuable insights for the development of new electromagnetic absorbing materials.
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ADVANCED ENGINEERING MATERIALS
·
2025
·
IF 3.3
Mengdi Li,Shiqiang Ouyang,Yichi Liu,Yiting Wu,Zihan Hu,Feijie Wang,Shufeng Ma,Liqiang Wang
In recent years, MXene has attracted significant attention for electromagnetic interference (EMI) shielding due to its unique layered structure and excellent conductivity. However, its mechanical limitations pose challenges for practical implementation. In this study, a lightweight, anisotropic MXene@Ag/wood aerogel composite is fabricated by integrating MXene with silver nanoparticles and loading it onto the cellulose framework of wood aerogels (WAs). The WAs are derived from natural wood through an eco-friendly delignification process. The composite leverages the 3D porous structure of natural wood and the high conductivity of MXene, while the incorporation of silver nanoparticles further enhances its EMI shielding performance, achieving a shielding effectiveness of up to 71.15 dB. It also exhibits a desirable low density of 0.065 g cm − 3 and high SSE/t value of 4904.75 dB cm 2 g −1 , demonstrating excellent lightweight properties. Its anisotropic structure results in direction-dependent shielding, which can be adjusted by material orientation, offering flexibility for diverse applications. Moreover, strong triboelectric nanogenerator output highlights its potential in flexible electronics. This composite holds promising applications in high-frequency circuits, communication systems, and aerospace, reducing EMI interference and enhancing system stability and safety. This study introduces a new strategy for developing lightweight, efficient EMI shielding materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yanyan Sun,Chenlong Wang,Jun Natsuki,Yifan Zu,Zhen Wang,Wenqi Nie,Toshiaki Natsuki
Hydrated vanadium pentoxide (V 2 O 5 ·nH 2 O, VOH) has emerged as a promising cathode material for zinc-ion batteries (ZIBs) owing to its tunable layered architecture, multivalent redox activity, and high theoretical capacity. However, its practical implementation is constrained by sluggish Zn 2+ diffusion kinetics and structural degradation during cycling, which significantly limit its rate capability and long-term durability. Herein, we propose a high-performance composite cathode material integrating VOH with MXene (Ti 3 C 2 T x ) via a two-step hydrothermal synthesis and interfacial bonding strategy. The MXene nanosheets serve as both conductive scaffolds and structural spacers, expanding the interlayer spacing of VOH while forming a stable V-O-Ti heterointerface. This synergistic configuration not only enhances electronic conductivity but also mitigates volumetric strain during Zn 2+ intercalation/ deintercalation. Consequently, the MX@VOH composite delivers a specific capacity of 325.6 mAh g −1 at 0.5 A g −1 and retains 86 % capacity after 1000 cycles at 5 A g −1 , outperforming most reported VOH-based cathodes. This work provides a universal and scalable interface engineering approach for designing high-performance cathodes in advanced energy storage systems.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yunlong Li,Mingming Liu,Xiaodong Zhou,Yongling Wu
Flexible wearable sensors have garnered significant attention for their potential applications in electronic skins, health monitoring, and smart devices. However, current flexible sensors often suffer from limitations, such as low sensitivity and inadequate resistance to mechanical and chemical degradation. To address these issues, this study presents a CPU@MXene@SiO2 superhydrophobic flexible sensor fabricated using a combination of electrospinning and dip-coating techniques. This sensor features a sandwich structure composed of an electrospinning fiber membrane (CPU) substrate, an MXene conductive coating, and a superhydrophobic SiO2 coating. Based on the fabricated sensor, strain and piezoresistive sensors were further assembled to systematically investigate the effects of micro/nanostructures and chemical compositions on wettability and sensing performance. Experimental results demonstrated that the CPU@MXene@SiO2 sensor exhibited outstanding comprehensive properties including high mechanical strength, superhydrophobicity (CA > 155°, RA < 3°), low adhesion force (33 μN) with water, high sensing sensitivity (gauge factor up to 4922.6), and fast response (response time of 94 ms). Moreover, to validate its potential for large-scale applications, a complete data acquisition system based on an STM32 microcontroller and a mobile application was designed and developed. A 4 × 4 sensor array was successfully fabricated and tested. This sensor demonstrates promising and attractive applications in wearable devices and human–machine interaction, offering an efficient design strategy for constructing robust and highly sensitive flexible sensors.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Anyang Duan,Fuyang Gu,Xiaodong Jiang,Jinmei Du,Dongyan Shao,Changhai Xu
Superhydrophobic fabrics suffer from being commonly penetrated by moisture after laundering, seriously deteriorating their water repellency after air drying. Numerous researchers have successfully recovered superhydrophobicity by drying in fluid ovens; however, high energy consumption and equipment dependence limit practical applications. Herein, the superhydrophobic photothermal self-healing cotton fabric (SPS cotton fabric) was fabricated by depositing a composite layer of cellulose nanocrystal-MXene (C-MXene) and polyacrylate (PA) coatings on the cotton cloth. Superior photothermal conversion of the SPS cotton fabric performance enables its 10.5–56.8 °C greater temperature than that of the pure hydrophobic cotton fabric under different simulated solar light intensities. After washing, the SPS cotton fabric can spontaneously restore superhydrophobicity with ≈100% efficiency by 30 mW·cm–2 solar light irradiation; in contrast, the single superhydrophobic fabrics recover only ≈71.2%. Even after 10 washing cycles, the recovery efficiency of the SPS cotton fabric only decreases by 0.1%, exhibiting excellent laundering durability. The SPS cotton fabric can retain ultralong time antifrosting (2760 s) and antifreezing (4080 s) capacities due to sustainable water repellency. Remarkably, the excellent self-healing capability of the SPS cotton fabric is attributed to the fact that the coiled nonpolar alkane chains can be restored to a straight state by autothermal drive, confirmed through element analyses and molecular dynamics simulations.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yanfei Yu,Haopeng Zhang,Yanqiu Xie,Fan Jiang,Xin Gao,He Bai,Fei Yao,Hongyan Yue
Vertically aligned porous morphologies have attracted much attention due to their long-range ordered channel structures. Here, a novel 3D vertically aligned graphene-MXene nanosheets based electrochemical supercapacitor is designed. Graphene oxide and Ti 3 C 2 T X MXene are used to prepare a vertically aligned porous bridge substrate (the pore size of 7 μm) by an ice template directional solidification method. Polyaniline nanowire arrays (PANI NWAs) are in-situ grown on the substrate by a polymerization process (positive electrode) and the substrate with more MXene is used as the negative electrode. After assembling into an asymmetric supercapacitor (ASC), the vertically aligned porous morphology is conducive to accelerating the directional transport of ions, which obviously improves the electrochemical properties of the ASC. The calculated specific capacitance of the ASC is 108F/g (at 1 A/g). The energy density of the ASC can reach 38 Wh/kg (at the power density of 810 W/kg) and the cycle stability is 82 % after 10, 000 cycles at 10 A/g.
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