JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Yu Liu,Changting Chen,Jianqiang Luo,Shujuan Liu,Jianguo Ma
Photoelectrocatalytic (PEC) reduction of soluble U(VI) to insoluble U(IV) represents a highly promising strategy for uranium removal. The design of photoelectrode materials with superior photoelectrochemical performance is crucial for enhancing PEC efficiency. In this study, an MXene-supported Co-NC (Co-NC/MXene) photoelectrode was successfully fabricated through electrostatic self-assembly. Compared to individual electrocatalytic (EC) and photocatalytic (PC) systems, the PEC system achieved an optimal U(VI) removal efficiency of 99.1 % with a rate constant of 0.116 min −1 , demonstrating reaction rates 13.4 times and 29.3 times higher than those of EC and PC systems, respectively. The Co-NC/MXene electrode exhibited exceptional adsorption capacity (3993.54 mg g −1 for 500 ppm) and maintained over 80 % removal efficiency after six consecutive cycles, highlighting its outstanding stability. This work provides novel insights into the application of MOF-derived/MXene materials for highly efficient U(VI) removal from aqueous solutions.
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ACS Sensors
·
2025
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IF 9.1
Meiling Lian,Kexin Luan,Tianlun He,Da Chen
The integration of gas sensors with small unmanned aerial vehicles (UAVs) has attracted widespread attention in atmospheric chemistry, industrial emission monitoring and environmental protection. However, conventional metal oxide semiconductor gas sensors currently installed on UAVs exhibit issues such as inadequate sensitivity, long response times, and unsatisfactory stability. In this direction, NiCo2O4 inserted two-dimensional layered Ti3C2 MXene have synthesized using a facile hydrothermal method for CO detection. The density functional theory (DFT) calculations were first employed to explore CO adsorption behaviors, revealing that the adsorption energy of gas molecules is significantly reduced after the combination of NiCo2O4 and MXene. The optimized MXene incorporation effectively prevents nanoparticle agglomeration, significantly increasing the specific surface area and exposing abundant active sites for gas adsorption. As a result, the hybrid sensor exhibited more than five times higher response toward 100 ppm CO at 110 °C with shorter response time (39 s) than pristine NiCo2O4. Through in situ Raman spectroscopy analysis, we elucidated the rapid adsorption–desorption of gas molecules on heterostructures. Furthermore, we successfully implemented the developed NiCo2O4/Ti3C2 MXene sensor on a compact drone platform, enabling real-time three-dimensional spatial mapping of CO concentrations. This work not only advances the design of high-performance gas sensing materials but also showcases the practical viability of drone-mounted MXene sensors for real-time 3D air quality mapping, paving the way for smart environmental monitoring systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Feihu Mu,Han Yang,Shengpan Xu,Xiaozhong Chu,Benlin Dai,Xujing Guo,Wenshuai Zhu
Given the pressing need to treat wastewater contaminated with antibiotics, particularly ciprofloxacin (CIP), a novel 2D MXene/flower-like C-SnS 2 Schottky junction photocatalyst was developed for the CIP degradation using a peroxymonosulfate (PMS)-assisted photocatalytic system. Under visible light irradiation, the 10-MXene/C-SnS 2 /PMS system achieved a CIP degradation efficiency of 98.2 % (rate constant: 0.07068 min⁻¹) within 60 min, representing 5.51-fold and 4.52-fold enhancements compared to C-SnS 2 and MXene/C-SnS 2 , respectively. These results demonstrated the synergistic effect between photocatalysis and PMS activation, as well as the critical role of MXene in enhancing the reaction efficiency. Density functional theory (DFT) calculations, combined with experimental data, elucidated the catalytic reaction mechanism. Moreover, Gaussian calculations identified key degradation intermediates. This study provides new insights into the construction of Schottky heterojunction photocatalysts combined with PMS catalytic systems for the degradation of organic pollutants.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yubin Li,Guoliang Dai,Jie Fan,Hong Xiao
Visible light transparent and low infrared emission materials have great prospects in infrared camouflage, building energy efficiency, passive radiation heating and many other fields, yet their manufacture remains a formidable challenge. inspired by the overlap of branches and fallen leaves in winter, we applied bionic principles to build a conductive network combining AgNWs and MXene on a transparent PET substrate, and developed an optically transparent, infrared-low-emission flexible conductive film. The prepared MA 10/133 film has a visible light transmittance of not less than 71 %, a sheet resistance of 12.03Ω·sq −1 , and average emissivities of 0.37 and 0.18 in two infrared atmospheric windows of 3–5 μm and 8–14 μm, and demonstrates excellent visible transparency and infrared camouflage performance. In addition, in the field of personal thermal management, with superior passive radiant heating performance, MA 10/133 film covered simulated human skin is 4.5°C and 1.5°C higher than those covered by cotton and woolen fabrics. Stable and controllable Joule heating performance can be used as an effective complement to passive radiant heating performance, with a maximum saturation temperature of 74.7°C at a driving voltage of 5 V, which is sufficient to cope with colder outdoor environments. These properties make composite films promising candidates for military thermal camouflage, outdoor life jackets and smart, energy-efficient windows.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Zeyu Wu,Linghao Zhao,Yangkun Sun,Yufeng Zhang,Yuerong Wang,Min Zhang,Hongyang Zhang,Fanghong Ning,Ping Hu
Hydrogen peroxide (H 2 O 2 ), a type of reactive oxygen species (ROS) produced by cells, plays a significant role in various physiological processes. Its abnormal concentrations in human body are closely associated with cellular damage as well as a variety of major diseases. Consequently, sensitive and accurate detection of cellular H 2 O 2 concentration is of great significance in evaluating the degree of intracellular oxidative stress in human cells. In this study, a novel heterogeneous nanomaterial, rGO@PDA@MXene-Au@COF, was designed for electrochemical-colorimetric dual-mode detection of intracellular H 2 O 2 , which enhances both peroxidase and electrochemical activities, achieving lower detection limits and broader linear ranges. ESR spectroscopy, EIS resistance analysis and computational simulation were employed to verify the mechanism of the activity enhancement, and the detection conditions were optimized. The methods were subsequently applied to the determination of H 2 O 2 in cells, yielding results of 1.69 × 10 −14 M H 2 O 2 /cell and 1.59 × 10 −14 M H 2 O 2 /cell for electrochemical and colorimetric detection of MCF-7 cells, and 1.67 × 10 −14 M H 2 O 2 /cell and 1.58 × 10 −14 M H 2 O 2 /cell of Hela cells, respectively. These results demonstrated high sensitivity and anti-interference capabilities, enabling quantitative detection of H 2 O 2 in complex cellular environments. Furthermore, the similarity in results between the two methods confirms their mutual accuracy and reliability. This work provided a novel approach for designing multifunctional nanomaterials and detecting H 2 O 2 in cells.
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POLYMER DEGRADATION AND STABILITY
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2025
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IF 7.4
Jirui Qu,Yusheng Tong,Yujiao Bi,Wenbo Sun,Yanyue Shi,Zexuan Zhao,Zhihui Liu,Shaofeng Wang,Lei Liu,Xilei Chen,Chuanmei Jiao
In recent years, P-N based hybrids flame retardants have received more and more attention in the field of fire safety due to their synergistic effect in the gas and condensed phases, which makes it easy to achieve efficient flame retardancy. However, their flame retardant mechanism in the gas phase rests more on the increase of non-flammable gases than on the conversion of harmful gases to harmless gases, and their hybrids are often not sufficiently stable. Therefore, in this study, P-N hybrids were encapsulated and modified using MXene, which has high thermal stability and outstanding catalytic ability, to prepare a novel flame-retardant hybrid, MDAPP, which was incorporated into rigid polyurethane foam (RPUF) to achieve more efficient fire safety performance. The results showed that MDAPP significantly enhanced the fire safety properties of RPUF composites. Specifically, RPUF-2.0MDAPP resulted in 40.98%, 63.16, and 60.00% decreases in total heat release (THR), total smoke release (TSP), and CO production rate (COPR) of RPUF, respectively. Moreover, the system also achieves synergistic flame retardant effects in the gas and condensed phases. At the same time, RPUF-2.0MDAPP has excellent thermal shielding performance, with a temperature reduction of 88.14% compared to RPUF in a fire source heating test when placed in a vertical position. In addition, the compressive strength and hydrophobicity of RPUF-2.0MDAPP have been improved to ensure its longevity in complex environments. This study proposes a solution to the problem of reducing the fire risk of RPUFs and promotes the widespread use of RPUF.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Chunyan Luo,Haibo Che,Bingzhe Jia,Xinrui Qiang,Jiarui Li,Lei Wang,Jiale Wang,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5 A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Salah Naji Sufyan,Yusof A. Y. A. Mohammed,Chenglong Mu,Kashan Bashir,Ning Wen,Muhammad Mamoor,Xiuling Jiao,Dairong Chen,Ting Wang
Flexible piezoresistive pressure sensors are crucial for next-generation wearable electronics, yet achieving simultaneous high sensitivity, durability, and mechanical robustness remains a challenge. Herein, we report a high-performance piezoresistive sensor fabricated through the integration of two-dimensional MXene nanosheets with a hierarchically structured modified polyamide 6 nanofiber net (D-PA6 NFN) using scalable vacuum filtration. Benefiting from the synergistic combination of MXene’s excellent electrical properties, web-like architecture, the composite nanofiber tensile strength (52 MPa), and flexibility (40%), the resulting sensor exhibited good sensitivity (0.189 kPa–1), a rapid response/recovery time (14/13 ms), and an ultralow detection limit (4.2 Pa). Moreover, the device maintained stability over 12,000 compression cycles. The sensor precisely captured both subtle physiological signals (pulse waveforms) and large-scale dynamic motions (joint flexion). This work establishes a scalable strategy for engineering durable, high-sensitivity electronic skins, with immediate applications in advanced human-machine interfaces and real-time physiological monitoring.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Yanbo Zhang,Denghua Zhang,Qi Zhou,Xihao Zhang,Shaoyu Hou,Hongxiang He,Xiaoliang Wu,Quanlong Li,Jianguo Liu,Chuanwei Yan
Interfacial interactions profoundly influence the proton conductivity and ion selectivity of ion-exchange membranes. However, previous studies on membranes primarily focus on enhancing the selective-conductive properties of the secondary phase while neglecting interfacial regulation. In this study, PFSA/CF 3 SO 3 -M heterogeneous membrane is successfully fabricated by incorporating CF 3 SO 3 -M nanosheets—derived from organic Lewis acid (trifluoromethanesulfonic acid) etching of Ti 3 AlC 2 —into perfluorosulfonic acid resin (PFSA). Compared to PFSA/HF-M hybrid membrane containing fillers etched by inorganic acid (HF), the PFSA/CF 3 SO 3 -M heterogeneous membrane exhibits superior proton conductivity, reduces vanadium ion permeability, and the highest ion selectivity (11.7 S min cm −3 ) among all tested membranes. This enhancement arises from two mechanisms: the development of heterointerface proton transport channels between filler and PFSA matrix and the pH-responsive Donnan exclusion effect inherent to the filler. Electrochemical evaluations demonstrate that the PFSA/CF 3 SO 3 -M membrane outperforms conventional Nafion membrane in vanadium redox flow battery (VRFB) applications, achieving 98.1% coulombic efficiency and 84.2% energy efficiency after 800 cycles. Cost analysis reveals that the PFSA/CF 3 SO 3 -M heterogeneous membrane demonstrates a 59.8% reduction in membrane cost compared to Nafion 212 in a 2 MW × 6 h VRFB system. This work establishes an effective strategy for designing MXene-based ion-selective membranes through rational interfacial engineering.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Chunqing Yang,Dongzhi Zhang,Weiwei Wang,Jun Wang,Yukun Liu,Lina Zhou,Yihong Guo,Jiahui Shao
In recent years, smart textiles and flexible wearable products have garnered significant attention in fields such as human-computer interaction, medical rehabilitation training, and motion monitoring. Flexible pressure sensors have attracted significant attention due to their excellent flexibility, stability, and multifunctional integration. Herein, a multifunctional wearable MXene/polydopamine (PDA)@cotton fabric pressure sensor was developed by modifying weft-knitted cotton fabric based on a dual hydrogen bond self-assembly strategy. The MXene/PDA@cotton fabric pressure sensor demonstrates wide linear detection range (0–146 kPa), high sensitivity (0.95 kPa–1), fast response/recovery times (16.434 and 11.952 ms), and outstanding stability after over 5000 cyclic tests. This sensor can achieve the monitoring of physiological parameters for human state detection, such as facial expression signals, abdominal respiratory signals, and joint bending signals. Furthermore, by integrating the MXene/PDA sensors into the interphalangeal and metacarpophalangeal joints of a cotton glove, combined with intelligent algorithms and the human-computer interaction system, static gesture recognition and dynamic sign language translation were successfully realized based on the smart glove. This work demonstrates the potential application of flexible pressure sensors in intelligent human-computer interaction, providing new insights for developing next-generation sign language recognition systems.
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JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Zhang Wentong,Cheng Hengyi,Liu Yanghang,Shi Xianhui,Yu Dan,Wang Wei
Strain sensors exhibiting heightened sensitivity and an expansive sensing range has emerged as a pivotal focal point within contemporary research endeavors, but the enhanced sensitivity on fiber-based sensors still needs to be systematically studied. Herein, this paper presents a novel approach to the preparation of high-performance fiber-based flexible strain sensors, which is achieved by firstly dip coated with DMF and then followed with layer-by-layer self-assembly to develop flexible strain sensors. Wrinkles are successfully formed on the surface of the wet spinning polyurethane (TPU) fiber by dip coating with DMF. The good conductive network is constructed with self-assembling with chitosan (CTS) and MXene layers, which giving the sensor excellent sensing capabilities. The high sensitivity is attributed to the obvious wrinkles on the surface of the fiber-based sensor with wide sensing range caused by the polymer chain segments within the TPU. The wrinkled structure provides more contact sites for the attachment of chitosan and MXene, endowing the sensor with higher sensing performance. The layer-by-layer self-assembly method allows for precise control over the number of assembled layers and the optimized sensor exhibits high sensitivity (713.7), a wide detection range (2–200%), fast response (150 ms), and excellent cyclic stability (3200 tensile cycles). Notably, it demonstrates excellent performance in information recognition and motion signal detection, highlighting its potential applications in smart devices and wearable textiles.
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Advanced Electronic Materials
·
2025
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IF 5.3
Anqi Zhou,Wenchang Yi,Yingjun Wu,Ziyi Wu,Yawei Fu,Tang Liu,Huimin Li,Naizheng Bian,Song Liu
MXene aerogels, known for their exceptional conductivity, hold significant potential in the development of pressure sensors. However, the van der Waals forces that solely exist between pure MXene nanosheets are inadequate for forming aerogels with high elasticity and mechanical properties, thus restricting the broad application of MXene aerogels in sensor technology. In this research, reduced graphene oxide (RGO) is utilized as the primary framework and incorporate polyaniline (PANI) to enhance intermolecular interaction forces, employing freeze-drying techniques to fabricate 3D porous-structured MXene aerogels. This approach significantly enhances the elasticity and electrical responsiveness of the aerogel. The resulting aerogel-based pressure sensor exhibits high sensitivity (4 kPa −1 ), a wide linear response range (1–20 kPa), rapid response/recovery time (300/100 ms), and excellent stability. The sensor is capable of detecting a variety of pressure signals, from gentle breezes to human motion, and is applied in voice recognition. Using a machine learning framework based on feature engineering, it is possible to accurately identify and classify distinctly pronounced letters from sensor outputs with an accuracy rate as high as 98%. In summary, the high-performance flexible pressure sensor based on MXene aerogel shows great potential for applications in health monitoring, smart wearable devices, and artificial intelligence.
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