JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dianchun Qiu,Kai Zheng,Tuxiang Guan,Zemei Li,Juan Peng,Qing Tao,Kelan Yan,Ningzhong Bao
Flexible supercapacitor is highly important to future wearable textile electronics and metaverse technologies, yet they are still limited by their unfulfilled specific capacitance and energy density . Here, a MXene (V 2 CT X ) based fiber fabric (MFF) was developed via a synergistic flow driven assembly strategy for high-performance supercapacitors . Adapted through reliable approaches of indirect etching, organic cation intercalation, and wet spinning, the MFF presents rich active sites, ordered paths, a moderate specific surface area (41.1 m 2 g −1 ), good flexibility and reproducibility. Admirably, the resulting fibrillar meshwork structure was found to be highly conducive to increasing energy density and reducing the electrochemical polarization. In this regard, a relatively good capacitance of 731 F g −1 is achieved at a current density of 0.5 A g −1 in H 2 SO 4 electrolyte. Furthermore, the assembled asymmetric solid-state supercapacitor (FSC) exhibits high specific capacitance of 401.2 F g −1 at 0.5 A g −1 , long cycle stability (5000 cycles) and high mechanical flexibility (5000 bending cycles). Benefiting from this outstanding electrochemical performance , the FSCs using EMIBF 4 /PVDF-HFP as electrolyte can be implied as reliable power source to flexible displaying and health monitoring. This work provides a novel MXene (V 2 CT X ) based fiber fabric for constructing flexible electrode, promising to open an avenue toward wearable devices.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Saleem Ullah Saleem,Yanhua Liu,Jing Sui,Geoffrey I.N. Waterhouse,Zhiming Zhang,Liangmin Yu
For electrochemical Pb 2+ detection, high sensitivity and stability are essential owing to the mutagenicity, carcinogenicity, and teratogenicity of aqueous Pb 2+ ions. Herein, a three-dimensional bismuth-containing metal-organic framework (Bi-MOF) was synthesized using a hydrothermal method, followed by post-synthetic functionalization with thiol (-SH) groups. A sandwich-type Bi-MOF-SH/Mx/Bi-MOF-SH/GCE multilayer sensitive electrochemical sensor was then constructed on the surface of the glassy carbon electrode for Pb 2+ detection. Differential pulse anodic stripping voltammetry (DPASV), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were used to evaluate the performance of the sensor. The developed multilayer sensor demonstrated an exceptionally high current response, good sensitivity (0.03–20.0 μg/L), and an ultra-low level of detection of 0.012 μg/L (S/N=3) towards Pb 2+ ions. The as-prepared electrode showed high stability, repeatability, and selectivity among possible interfering ions (Na + , Ca 2+ , Cu 2+ , Zn 2+ , K + , Mg 2+ , Al 3+ , and Cd 2+ ), suggesting potential for use in real-world applications.
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CARBON
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2024
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IF 10.5
Yuhong Cui,Shenghua Xue,Zihan Liu,Tiantian Wang,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Nanomaterials play an important role in reducing friction and wear when used as lubricating additives. Due to synergistic effects , nanocomposites often have superior lubrication properties than individual materials. Therefore, based on the structural differences between MXene and phenolic resin modified polytetrafluoroethylene ( m PTFE), MXene@ m PTFE composites with multiple heterogeneous structures are designed and constructed. As expected, the synergistic effect of layered MXene and m PTFE nanoparticles endows MXene@ m PTFE excellent tribological performance . Under the action of shear force, m PTFE nanoparticles accelerate the interlayer slip between MXene nanosheets , and m PTFE nanoparticles with high hardness and thermal stability act as ball bearings to improve the extreme pressure characteristics of the oil. Compared to base oil (PAO-6), the coefficient of friction (COF) decreased from 0.644 to 0.111, the wear volume decreased by 92.7 %, and the bearing capacity increased to 750 N. This study provides new implications for the development of nanolubricant additives.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zhen-wei Guo,Yan-fen Mo,Xiao-ning Tang,Yu-hui Xie,Dong Feng,Feng Wu,Yi Mei,Delong Xie
The development of natural rubber (NR) gloves with superior antibacterial and enhanced mechanical properties is critical for safeguarding healthcare personnel. In this study, Ti-based MXene (Ti 3 C 2 T x ) nanosheets were employed for the first time as an antibacterial agent to improve the antimicrobial performance of NR. Through SiO₂ intercalation via electronic assembly, the antibacterial efficacy of MXene was significantly boosted, achieving 100 % lethality against E. coli and 90.95 % against S. aureus . Mechanistic studies revealed that silica nanoparticles primarily enhanced MXene's ability to induce physical damage and generate reactive oxygen species (ROS). The positively charged MXene-SiO₂ nanosheets were then incorporated into negatively charged natural latex to form NR nanocomposites with a hierarchical MXene structure. Compared to pristine NR, the nanocomposites exhibited 100 % lethality against E. coli and 74.72 % against S. aureus with the addition of just 0.5 phr MXene-SiO₂. Furthermore, the mechanical properties of NR were enhanced, with the modulus at 50 % and 100 % strain increasing by 22 % and 15 %, respectively, while elongation at break improved to 790 %. This work not only presents a novel approach for enhancing the antibacterial and mechanical properties of NR, but also deepens the understanding of MXene's antibacterial mechanism and its potential applications in healthcare materials.
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PubMed
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Nanoscale
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2025
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IF 5.1
Yu Wang,Xudong Wang,Mian Li,Zhifang Chai,Qing Huang
The study investigates the structural evolution of Ti3SiC2 using the gaseous etchant CCl4, emphasizing its ability to selectively etch Si and Ti atoms to form an MXene (Ti3C2Cl2)/carbon composite and carbide-derived carbon (CDC). Under specific conditions, a complete conversion to the MXene is accomplished at a Ti3SiC2 : CCl4 molar ratio of 1 : 3.5, whereas higher CCl4 concentrations lead to further oxidation of Ti3C2Cl2 and formation of lamella CDC. This method presents an alternative chemical etching route to synthesize MXenes. Importantly, the production of CDC using CCl4 as an etchant could obtain carbon/MXene hybrids with significant implications for promising energy storage applications.
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ENERGY
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2025
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IF 9.4
Ziyang Zhu,Nan He,Dong Wang,Qicheng Chen,Yingjin Zhang,Bingjian Nie
MoS 2 is considered a highly promising anode material for supercapacitors owing to its distinctive two-dimensional structure. However, its relatively low electrical conductivity restricts its further development and practical application. For the purpose of addressing this issue, this study reports the first synthesis of a CuO@MoS 2 /MXene ternary heterostructure based on hollow CuO. The formation of the built-in electric field, along with the redistribution of local charge, facilitates the transformation of 2H-MoS 2 into highly conductive 1T-MoS 2 . In addition, the three-dimensional crosslinked network structure formed by the highly conductive MXene and MoS 2 layers offers additional storage capacity for electrolyte ions, thereby further enhancing the energy storage density of the material. This negative material exhibits a maximum specific capacitance of 1435.2 F g −1 , which is significantly higher than that of most reported MoS 2 -based negative materials. The synergistic support provided by the porous CuO substrate and the MXene layer effectively inhibits the lamellar aggregation of MoS 2 , thereby achieving a capacitor retention rate of 90.1 % after 5000 charge-discharge cycles. The asymmetric supercapacitor constructed from the material achieves a maximum energy density of 91.4 Wh·kg −1 , demonstrating excellent application potential in various fields. This study addresses the research gap concerning negative electrode materials for high specific capacitance MoS 2 -based supercapacitors and offers a novel approach to further enhancing the energy density of supercapacitors.
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CARBON
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2025
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IF 11.6
Jing Li,Lingling He,Weimin Xia,Chao Du,Li He,Xiao Li,Caiyin You,Di Zhou
Ti 3 C 2 T x MXene nanosheets have introduced significant potential for enhancing impedance matching, fine-tuning electromagnetic parameters, and improving microwave absorption performance. However, substantial challenges remain regarding the performance in low-frequency (2–8 GHz) microwave absorption. Herein, a facile electrostatic self-assembly approach and modified etching method is employed to construct the heterogeneous interfaces by integrating LiFe 5 O 8 nanoparticles with MXene nanosheets. The results indicate that the epitaxial growth of LiFe 5 O 8 nanoparticles on the MXene surface could enhance interfacial polarization. Furthermore, the heterogeneous structure improves the magnetic coupling and the electromagnetic waves (EMW) reflection. Notably, the minimum reflection loss (RL) value is −60.58 dB at 5.52 GHz in C band when the MXene to LiFe 5 O 8 ratio is 1:4. Moreover, the minimum RL is −61.75 dB at a thickness of 2.46 mm and an effective absorption bandwidth (EAB) reaches 6 GHz at 1.63 mm when the MXene to LiFe 5 O 8 ratio is 1:2. Additionally, the MXene/LiFe 5 O 8 nanocomposites exhibit varying degrees of absorption across C, X, and Ku bands, signifying the enhancement of microwave absorption performance across frequency bands. This design strategy offers a novel approach for developing microwave absorption materials characterized by high absorption efficiency and wide bandwidth in low-frequency.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jiale Wang,Xinrui Qiang,Bingzhe Jia,Lei Wang,Jiarui Li,Haibo Che,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene shows great potential in the field of flexible electrodes owing to its distinctive two-dimensional structure, high conductivity, and large specific surface area. Nonetheless, during repeated bending, the bonding between the electrode and the conductive substrate weakens, which leads to a decrease in conductivity and, ultimately, a decline in the cycling stability of flexible devices, limiting their practical applications. Based on this, this paper presents the preparation of a MXene-Ag composite with excellent flexibility and cycling stability through a simple redox reaction. Electrochemical performance tests reveal that the material achieves a high specific capacitance of 191 F g −1 at a current density of 1 A g −1 and demonstrates an impressive capacity retention of 95.8 % after 10000 cycles at 5 A g −1 . To further assess the electrochemical performance under bending conditions, MXene-Ag//AC flexible asymmetric solid-state supercapacitors are assembled. Surprisingly, after 1250 charge/discharge cycles at bending angles of 30°, 60°, and 90°, the device still maintains a capacitance retention of 97.2 % (5 A g −1 ), which is a 7 % increase compared to before Ag loading. This demonstrates that the addition of Ag contributes to the improved electrochemical cycling stability of the flexible device.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jie Wei,En-Kang Wu,Ji-Hao Zhang,Zhen Zhang,Xiao-Cong Tang,Tian Qiang,Yong-Woo Jang,Xiao-Feng Gu,Meng Zhao,Svetlana von Gratowski,Jun-Ge Liang,Ming-Yang Yan,Cong Wang
Acetone sensors continue to command significant attention as a robust platform for emissions control, industrial safety monitor, and diagnostic analysis of human exhaled gas for diabetes monitoring. This study presents the design and fabrication of an ultra-narrowband, interdigital capacitor (IDC)-based three-level split ring resonator (TSRR) microwave gas sensor for rapid acetone detection. MXene-TiO 2 composites with varying mass ratios were deposited onto the resonator surface to evaluate the gas-sensitive properties of TiO 2 /MXene materials across acetone concentrations of 10–500 ppm. Results demonstrate that the microwave acetone sensor incorporating the TiO 2 /MXene (3 wt%) composite exhibits exceptional performance: high sensitivity (1544 mdB/ppm), rapid response and recovery durations (130 s and 140 s, respectively), superior selectivity, and excellent stability under high-humidity conditions—significantly surpassing existing microwave gas sensors. Furthermore, the gas-sensing mechanism was elucidated through impedance-matching circle diagrams corresponding to varying acetone concentrations. MXene materials, renowned for their expansive specific surface area, exhibit considerable promise in gas sensing applications, particularly for room-temperature acetone detection with high selectivity and sensitivity extending to ppb concentrations. This investigation introduces a novel paradigm for room-temperature acetone gas detection, as evidenced by the development of triboelectric plasma-regulated high-sensitivity sensors.
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APPLIED THERMAL ENGINEERING
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2025
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IF 6.9
Junxiu Piao,Zongyao Zhang,Tianyi Li,Xu Han,Sheng Bi
Phase change materials (PCMs) hold considerable promise for battery thermal management. However, their widespread application is hindered by leakage risk and low thermal conductivity. This study synthesized a novel MXene-modified microencapsulated PCM (MPCM/MXene) via in-situ polymerization, where MXene nanosheets act as bridges connecting multiple microcapsules to enhance thermal conductivity. Morphological analysis confirmed the embedded nature of MXene as an inter-microcapsule bridge. The results of thermal properties showed a substantial improvement in heat transfer performance, with the MPCM/MXene achieving a thermal conductivity of 0.13 W·m −1 ·K −1 , 120 % higher than that of pristine microencapsulated PCM. Thermal cycling tests demonstrated a 50.5 % reduction in leakage rate for MPCM/MXene after 100 cycles, confirming that the MXene bridging network significantly boosts thermal conductivity. This “bridging” structure effectively reduces internal thermal stress within the microcapsules and enhances their mechanical strength. Furthermore, MPCM/MXene exhibits excellent energy storage capability, evidenced by its enthalpy value of 97.1 J/g. Battery thermal management tests underscored the superior cooling performance of MPCM/MXene, effectively controlling the peak temperature of the battery module below 40 °C. Therefore, the developed MPCM/MXene exhibits outstanding thermal performance and demonstrates broad application prospects for battery thermal management systems (BTMS).
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ACS Photonics
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2025
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IF 6.7
Shulin Sha,Tong Xu,Kai Tang,Wenjie Li,Yun Wei,Peng Wan,Zeng Liu,Caixia Kan,Da Ning Shi,Mingming Jiang
With the development of artificial intelligence and machine vision technologies, breaking the von Neumann bottleneck has become a key issue in the revolution of computing systems. Herein, a flexible and integrable CuSCN/MXene–TiOX/TiO2 synaptic device is fabricated on account of the high-k dielectric layer derived from the oxidation of MXene, which is capable of simulating the multimodal behavior of biological synapses. The device demonstrates a dynamic and controllable transition from short-term to long-term memory, which allows the achievement of excellent relearning capabilities under light pulse stimuli. Theoretical analysis illustrates that the enhanced synaptic plasticity is attributed to carrier localization caused by oxygen vacancies in the MXene–TiOX dielectric layer. The CuSCN/MXene–TiOX/TiO2 device achieves high recognition accuracies of 94.60% and 79.81% in handwritten digit and clothing recognition tasks, outperforming previously reported optoelectronic synaptic devices of similar types. Importantly, the CuSCN/MXene–TiOX/TiO2 device enables artificial visual perception, visual memory, and real-time respiratory monitoring. Moreover, by integrating with internet of things (IoT) technology, it demonstrates its potential application value in remote respiratory detection across multiple platforms. This work highlights the broad application prospects of in situ oxidized MXene in low-power neuromorphic computing and multimodal perception, and provides a new technological pathway for advancing next-generation human–computer interaction and IoT-based intelligent health monitoring.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Dongli Li,Yinan Dong,Hua Zhang,Dagang Liu,Zhituo Geng,Chenxi Li,Hao Li,Jiayao Zhou,Zhipeng Li,Hai Lin,Weitian Zhang,Shengze Yu,Shuyan Yu,Congju Li,Yongping Huang,Jingkun Jiang,Zehui Li
Nitrogen oxides (NO x ) monitoring requires sensor platforms that deliver ppb-level sensitivity, ambient-temperature operation, and molecular discrimination. However, rapid and selective NO x detection at room temperature remains elusive. Although 2D transition metal carbides/nitrides (MXenes) show promise in chemiresistive sensing, their susceptibility to ambient degradation and poor selectivity limit practical deployment. Here, a room-temperature NO x sensor is developed by epitaxially growing Hofmann-type metal–organic frameworks (Ni-pyz) on oxygen-terminated monolayer large-size MXene (Ti 3 C 2 T x ). The Ni-pyz/Ti 3 C 2 T x heterostructure exhibits enhanced sensitivity (4.8 and 5.5 times compared to Ti 3 C 2 T x ) and low detection limits (8.8 and 6.9 ppb) for NO and NO 2 , along with high selectivity and good stability (>85% response after 8 weeks). The enhanced sensitivity results from electronic coupling between the Ti 3 C 2 T x and Ni(CN) 4 , promoting charge transfer with NO x . The improved selectivity arises from the pore confinement effect of Ni-pyz and the specific adsorption of NO x through Lewis acid-base interactions with open Ni sites. Importantly, the dynamic response of Ni-pyz/Ti 3 C 2 T x closely mirrors that of a trace-level chemiluminescence NO x analyzer at low NO x concentrations, enabling high-temporal-resolution, long-term atmospheric monitoring. This functional strategy overcomes the insufficiency of MXene-based gas sensors, paving the way for the development of high-performance sensors.
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