COMPOSITES PART B-ENGINEERING
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2024
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IF 12.7
Hang Zhang,Longhai Yi,Yezhou Ni,Zhenhua Jia,Hua Qiu,Kunlin Chen
Flexible conductive coatings have the potential to imbue traditional textiles with a range of functional or intelligent properties, including sensing, light emission, heat generation, etc. However, these flexible coatings are prone to damage from external forces in real-world applications. This study focuses on developing a chemically modified flexible coating with MXene as a conductive ligand, aiming to strike the characteristics of mechanical, conductive, and self-healing harmoniously. The process involves synthesizing modified 4-vinyl benzaldehyde into polyurethane (VPU), which is then cross-linked with chitosan to enhance the self-healing efficiency. The conductive ligand, MXene, was modified with tannic acid to strengthen hydrogen bonding with the VPUs. The resulting self-healing waterborne polyurethane conductive coating exhibits an impressive self-healing efficiency of 96 %, along with a high tensile strength at a break of 5.58 MPa and an elongation at a break of 340 %. It also demonstrates antimicrobial effects against Escherichia coli and Staphylococcus aureus of up to 86.8 % and 90.1 %, respectively. Importantly, this study also explores the wearable applications of flexible electronic devices. They can detect pressures up to 100 kPa in a maximum sensitivity of 0.204 kPa −1 in the initial pressure range from 1 to 15 kPa. They can also monitor the pressure response of the foot in different motion states, suggesting potential integration with insoles or socks. This work offers a practical method for combining the key properties of polymer conductive coatings with the design of carbon nanomaterial-based stress-strain sensors. They are potentially applied to this approach including smart robots, e-skins, wearable health management systems, and artificial intelligence, among others.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Huimin Jiang,Hong Wang,Kaiyu Liu,Zhe Feng,Sarah Alharthi,Mohammed A. Amin,Jianjian Lin
Transition metal fluorides because of the high electronegativity of fluorine may enhance the local electron density of the metal sites and promote water molecule dissociation and charge transfer. However, enhancing the intrinsic activity of fluorides to improve material stability remains a challenge. Herein, we develop an innovative four-step synthetic strategy (electrochemical deposition → co-precipitation → ligand exchange → in situ fluorination) to engineer three-dimensional porous Fe-doped CoF 2 nanocubes vertically anchored on MXene (Fe-CoF 2 /MXene/NF). This breakthrough achievement lies in the construction of a rapid mass transfer structure: porous cubes increase the contact area of reactants and create convection channels to achieve rapid bubble separation. The synergistic effect of Fe-doped CoF 2 and MXene not only optimizes the adsorption of intermediates but also promotes rapid electron transfer at the interface, and robust structural robustness. Remarkably, the optimized catalyst achieves low overpotentials of 121 mV (hydrogen evolution reaction, HER) and 210 mV (oxygen evolution reaction, OER) at 10 mA cm −2 , surpassing most reported transition metal fluorides. Notably, it enables efficient overall water splitting at an ultralow cell voltage of 1.52 V (10 mA cm −2 ) while maintaining 98 % activity after 100-h continuous operation. This work establishes a synergistic strategy to enhance catalytic activity by simultaneously modulating electronic configurations and accelerating charge transfer kinetics, achieved through rational structural design integrating organic framework derivatization, the coupling of metal doping with interfacial engineering.
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JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Zhang YaXi,Liang Jin,Zhang Li,Zou FengYuan,Li YunFeng,Zeng ZiQuan,Lei Tian,Yang Guang
As a clean energy carrier, hydrogen necessitates efficient production via cost-effective, highly active non-noble metal electrocatalysts. Herein, we demonstrate a Zn-doped CoP heterostructure catalyst anchored on MXene-engineered nickel foam (MXene@ZnCoP/NF) through synergistic substrate engineering and compositional modulation. This design achieves exceptional alkaline hydrogen evolution reaction (HER) activity and superior overall water splitting efficiency. In 1.0 M KOH electrolyte, the MXene@ZnCoP/NF heterostructure exhibits exceptional HER performance, achieving a low overpotential of 15 mV at 10 mA cm −2 , 64 mV at 50 mA cm −2 , 214 mV at 500 mA cm −2 , and a Tafel slope of 86.0 mV dec −1 , indicative of rapid reaction kinetics. Furthermore, the catalyst demonstrates industrial-grade durability, maintaining stable operation for 65 h at 500 mA cm −2 without significant degradation. When integrated into a full-cell electrolyzer with RuO 2 /NF as the anode (RuO 2 /NF ||MXene@ZnCoP/NF), the system requires only 1.53 V to deliver a current density of 10 mA cm −2 , surpassing the performance of the noble metal system Pt-C/NF||RuO 2 /NF (1.61 V). This highlights its potential as a cost-effective alternative to noble metal-based electrocatalysts for scalable hydrogen production. The enhanced catalytic performance can be primarily attributed to the synergistic interplay of three key factors: the superior conductivity provided by MXene-engineered NF substrates, the Zn doping-induced crystalline-to-amorphous phase reconstruction, and the morphological transformation from micrometer-scale architectures to nanoscale structures. This study proposes an innovative “substrate–structure–composition” synergistic strategy that establishes a new paradigm for designing highly efficient non-noble metal HER electrocatalysts, thereby propelling the scalable industrial implementation of electrocatalytic water splitting for hydrogen production. Graphical abstract
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Advanced Energy Materials
·
2021
·Vol. 11
·期 22
·2100757
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IF 29.368
Wang Zhang,Jian Peng,Weibo Hua,Ying Liu,Jinsong Wang,Yaru Liang,Weihong Lai,Yue Jiang,Yang Huang,Wei Zhang,Huiling Yang,Yingguo Yang,Lina Li,Zhenjie Liu,Lei Wang,Shu-Lei Chou
Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V 2 C MXene ( a -VO x /V 2 C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g –1 at 50 mA g –1 , decent rate capability with capacity up to 96 mAh g –1 at 2000 mA g –1 , and good cycling stability as a cathode for sodium-ion batteries. The a- VO x layer enables reversible and fast Na + insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V 2 C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a -VO x /V 2 C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V–O vibration and valence oscillation between V 4+ and V 5+ in the disordered framework, with robust structural stability and unobstructed Na + diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Zhongjie Ji,Dong Yang,Hongru Wang,Zhenqian Sun,Linyang Song,Xin Liu,Hongliang Wang,Yunzhen Chen,Hongxin Cao,Yunhao You,Guangjun Jiao
Skin wound infection represents one of the most frequent complications in the management of surgical diseases, significantly delaying healing processes and potentially leading to life-threatening conditions. Bacterial invasion promotes biofilm formation, which increases local reactive oxygen species (ROS) levels, disrupts the wound microenvironment, and compromises regenerative capacity. Conventional treatments often fail to effectively eradicate deep biofilm-associated infections, while prolonged antibiotic use fosters multidrug-resistant bacteria and biofilm persistence, underscoring the urgent need for novel antibacterial approaches. In this study, a multifunctional hydrogel dressing is developed that integrates MXene nanosheets with a metal-phenolic network (EGCG-Cu) and the nitric oxide (NO) donor BNN6. This composite hydrogel enables near-infrared (NIR)-triggered photothermal therapy and simultaneous NO release, resulting in synergistic antibacterial activity against Staphylococcus aureus and Escherichia coli , along with effective biofilm eradication. The EGCG-Cu coating further confers remarkable antioxidant and anti-inflammatory properties by scavenging ROS and modulating cytokine expression. In a murine model of infected wound healing, the hydrogel accelerated tissue repair through enhanced collagen deposition, angiogenesis, and regulation of the immune microenvironment. This non-antibiotic strategy provides spatiotemporal control over antibacterial and healing-promoting functions, demonstrating considerable promise for the treatment of complex wound infections.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Lin Chen,Xi Chen,Fei Wang,Yu Tong,Kewei Zhang,Zhengbo Han,Mingzhe Zhang
Metal-organic frameworks (MOFs) are regarded as potential candidate materials with great application prospects in the field of gas sensing. In this study, MOF derivatives were anchored onto MXene sheets through self-assembly technology to prepare a heterojunction material ZnO/Ti 3 C 2 T x MXene with high specific surface area, achieving ultrafast dual gas sensing behavior for H 2 /NO 2 . At a low temperature of 80°C, the ZnO/ Ti 3 C 2 T x MXene heterojunction sensor exhibited an ultrafast response (23.17%) to 500 ppb H 2 within 3.2 s. After a moderate temperature increase to 180°C, it also demonstrated significant sensing performance (46.3%) to 500 ppb NO 2 within 4 s. The electronic interaction mechanism of ZnO/ Ti 3 C 2 T x MXene heterostructures in H 2 and NO 2 detection was revealed through density functional theory calculations and in-situ Raman spectroscopy, clarifying the influence of interfacial charge transfer on sensing performance. Heterogeneous structures achieve the regulation of gas adsorption-induced electron rearrangement and carrier modulation by constructing interface charge-regulating channels, significantly enhancing the response rate, selectivity and reversibility in the detection of H 2 and NO 2 , thereby enabling highly sensitive and trace detection of the two gases.
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ANALYTICA CHIMICA ACTA
·
2025
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IF 6
Jiawei Li,Wei Lai,Mingsheng Tan,Mengdi Guo
Background With the advancement of technology and growing health concerns, high sensitivity, flexibility, and multi-channel detection have become crucial indicators for wearable intelligent sensors. Results Inspired by the volume contraction of hydrogels upon ethanol exposure, a strategy combining MXene with in situ reduction of silver nanoparticles has been used to construct a three-dimensional, high-sensitivity SERS substrate (MX-SNP PAH-based SERS substrate). This design not only enriches target molecules but also enables dual enhancement of charge transfer and electromagnetic enhancement by inducing inter-particle spacing between silver nanoparticles and V 2 CT x . The developed SERS substrate allows for the quantitative analysis of pesticide molecules (thiram, 1 nM), small molecules such as p-mercaptobenzoic acid (pMBA, 1 nM), and microplastics like polystyrene (PS, 6.25 μg mL −1 ). Additionally, by analyzing the sweat SERS spectra, it was possible to successfully quantify blood glucose levels (4.5 mM). Significance This innovative MX-SNP PAH-based SERS substrate design provides valuable insights for the development of flexible wearable sensors, with significant application potential in food safety, water quality analysis, and health monitoring.
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Journal of Energy Storage
·
2023
·
IF 9.4
Jingxin Zhao,Hongyu Lu,Xijun Wei,Yuanyuan Gao,Yingze Song,Bingang Xu
Constructing a Zinc ion hybrid supercapacitor (ZHMSC) configuration with excellent electrochemical performance for progressive energy storage is worldwide attractive but yet still a considerable challenge. In this study, a universal and effective strategy has been proposed and developed for 3D-writing additive-free V 2 CT x MXene architected ZHMSC to realize the excellent electrochemical performance. With proper designs of printable electrochemical materials and direct ink writing architectures, 3D printed ZHMSC devices with high areal capacitance and excellent areal energy density have been achieved in a limited footprint area. Benefitting from the excellent ion diffusion and highly conductive networks, the 3D printed ZHMSCs device achieves the ultrahigh specific capacitance of 3.82 F cm −2 , large energy density of 1.36 mW h cm −2 and remarkable cyclic performance with the capacitance retention of 97.8 % after 12,000 cycles at 20 mA cm −2 . This work not only provides new insights on direct ink writing for high-performance Zn-Ion hybrid capacitor, but also offers a facile and efficient method to construct large-scale energy storage devices with high electrochemical performance for future energy storage.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Xinyi Zhang,Haiting Shi,Liangsen Liu,Chunying Min,Shuaitong Liang,Zhiwei Xu,Yanling Xue,Chunxia Hong,Zhijiang Cai
Molybdenum disulfide (MoS 2 ) has possession of a layered structure and high theoretical capacity, which is a candidate anode material for sodium ion batteries . However, unmodified MoS 2 are inflicted with a poor cycling stability and an inferior rate capability upon charge/discharge processes. Considering that the shape and size of anode materials play a key role in the performance of anode materials, this paper proposes a multi-level composite structure formed by the micro-nano materials based on self-assembled molybdenum disulfide (MoS 2 ) nanoflowers , Mxene and hollow carbonized kapok fiber (CKF). The micro-nano materials can be connected to form heterojunction and agglomeration can be avoided. The load bearing of heterostructure and stress release of CKF are coordinated to form a double protection mechanism, which improves the conductivity and structural stability of hybrid materials . Based on the above advantages, it has higher specific capacity than pure MoS 2 , and has better rate performance (639.3, 409.5, 386.2, 372, 338, 422.8 and 434.7 mAh g −1 at the current density of 0.05, 0.1, 0.2, 0.5, 1 ,0.1 and 0.05 A·g −1 , respectively). The stress-modulated strategies can provide new insights for the design and construction of transition metal sulfides heterostructures to achieve high performance sodium ion batteries .
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Rongliang Yang,Qingmei Hu,Shaodian Yang,Zhiping Zeng,Hao Zhang,Anyuan Cao,Xuchun Gui
Two-dimensional (2D) MXene nanosheets are attractive for electrochemical energy storage applications due to their superior surface-controlled charge storage capacity. However, the slow ion transport in the closely packed electrode limits their electrochemical performances. Meanwhile, the restricted surface-controlled pseudocapacitance of MXene nanosheets requires to be enhanced. Herein, a well-controlled electrophoretic deposition strategy is developed to disperse Ti3C2Tx nanosheets into a freestanding, porous carbon nanotube (CNT) sponge. The constructed Ti3C2Tx@CNT hybrid sponge can provide high-speed ion-transport pathways for the charge–discharge process. Furthermore, by tuning the deposition potential, the inserted MXene nanosheets can be partially oxidized, boosting the pseudocapacitance performance. A large gravimetric capacitance of 468 F g–1 at 10 mV s–1 and a retention of 79.8% at 100 mV s–1 can be achieved in the Ti3C2Tx@CNT electrode. Meanwhile, the highest areal capacitance of 661 mF cm–2 at 1 mA cm–2 was obtained in the sample with high-loading Ti3C2Tx. For the assembled symmetric supercapacitor, 92.8% of the capacitance is retained after 10 000 cycles of the charge–discharge process at 10 mA cm–2. Thus, this study develops a promising electrophoretic deposition strategy for dispersing 2D MXene nanosheets and boosting their pseudocapacitive performance, resulting in a high-capacitive electrochemical energy storage electrode.
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ACS Nano
·
2024
·
IF 15.8
Zhaoxi Liu,Yapeng Tian,Jian Yang,Song Xu,Qingyong Tian,Pengfei Yan,Buxing Han,Qun Xu
Regulating the surface termination of a confined space to achieve ultrafast ion transport remains an ongoing challenge. Two-dimensional (2D) MXenes possess adjustable structures and interlayer spacing, which provide an ideal platform for in-depth investigation of ion transport in 2D confined space; however, the strong interaction of the negatively charged terminations in MXenes hinders the transport of intercalated cations. In this work, we proposed a strategy that precisely regulates the surface modification of Ti3C2Tx MXene with the weak polarity of boron atoms (SCB-MXene) via the distinct effect of supercritical CO2. This not only could effectively substitute −OH termination in MXene but also can prevent the loss of −O active sites, and then, both ultrafast ion transport and high volumetric capacitance can be achieved simultaneously. Ideally, a volumetric capacitance up to 742.7 C cm–3 at 1000 mV s–1 for the SCB-MXene film as pseudocapacitive materials that provides an energy density of 66.3 Wh L–1 even at an ultrahigh power density of 132.5 kW L–1 is obtained, which is a prominent record of energy density and power density reported up to now. Subsequently, it can be used in large-scale energy storage and conversion devices.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hailong Xu,Xiaowei Yin,Xinliang Li,Minghang Li,Shuang Liang,Litong Zhang,Laifei Cheng
Lightweight absorption-dominated electromagnetic interference (EMI) shielding materials are more attractive than conventional reflection-dominated counterparts because they minimize the twice pollution of the reflected electromagnetic (EM) wave. Here, porous Ti2CTx MXene/poly(vinyl alcohol) composite foams constructed by few-layered Ti2CTx (f-Ti2CTx) MXene and poly(vinyl alcohol) (PVA) are fabricated via a facile freeze-drying method. As superior EMI shielding materials, their calculated specific shielding effectiveness reaches up to 5136 dB cm2 g–1 with an ultralow filler content of only 0.15 vol % and reflection effectiveness (SER) of less than 2 dB, representing the excellent absorption-dominated shielding performance. Contrast experiment reveals that the good impedance matching derived from the multiple porous structures, internal reflection, and polarization effect (dipole and interfacial polarization) plays a synergistic role in the improved absorption efficiency and superior EMI shielding performance. Consequently, this work provides a promising MXene-based EMI shielding candidate with lightweight and high strength features.
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