TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Mingyuan Dou,Qing Feng,Kangchun Li,Zhenpeng Li,Fuchuan Huang,Fukang Deng
The unique physicochemical properties and 2D layered structure of MXene make it a promising lubricant additive. However, its chemical instability limits its application in environmentally friendly and sustainable lubrication systems. Although various strategies have been explored to enhance the chemical stability and tribological properties of MXene aqueous solutions, these approaches often compromise MXene's chemical compatibility and require high-viscosity petroleum-based lubricants. In this study, choline hydroxide and amino acids were added to a Ti 3 C 2 T x aqueous solution, leading to the self-assembly of choline hydroxide and amino acids into ionic liquid micelles. These micelles effectively passivated the surface of Ti 3 C 2 T x and improved its chemical stability. The experimental and simulation results showed that the ionic liquid micelles facilitated the formation of hydrogen bonds and coordination bonds between the amino acid and the Ti 3 C 2 T x surface. This interaction increased the binding energy by 2.5 times, preventing oxidation and degradation for over 90 days of storage. Moreover, during frictional processes, a TiN/TiO 2 reaction film formed between choline hydroxide, amino acids, and Ti 3 C 2 T x contributed to improved tribological properties, reducing the friction coefficient by up to 39.18 % and the wear rate by up to 69.79 %, while ensuring long-term friction stability.
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产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Qi Ao,Lin Jiang,Ying Song,Xinglai Tong,Tuohao Jiang,Jun Tang
Enzyme immobilization has emerged as a promising strategy to facilitate the industrialization of biomolecules. However, immobilized systems are now still facing great challenges such as maintaining enzyme activity, large-scale manufacturing recovery and leaching or conformational changes of enzymes. Therefore, advanced enzyme immobilization techniques (efficient, stable and tunable catalysis) are currently an important challenge in this field. Here, enzyme@cyclodextrin covalent organic framework films are synthesized by template method and further constructed three-dimensional (3D) hydrogen bond-enhanced efficient MXene/enzyme membrane reactor. This strategy provides a spacious microenvironment for the release of enzyme molecules, a simpler process, an easier-to-etch template, a more biocompatible carrier. Furthermore, a versatile platform for interfacial photothermal and fast mass-transfer by constructing films with MXene. The obtained biocatalysts have excellent reusability, high activity and stability, which can be used as efficient biocatalysts for important industrial reactions. The enzyme membrane reactor is constructed by the ‘smart capsule ’ with enzyme@cyclodextrin-COF structure. The strategy can solve the challenging problems of the original previous enzyme immobilization system. Overall, a new idea is provided for the green, efficient, stable and sustainable general enzyme catalytic platform.
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产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Huan Liu,Aminov Nail,Decheng Meng,Liran Zhu,Xiaohan Guo,Cong Li,Xiaoqing Ye,Huanjun Li
Infected wound healing remains a significant clinical challenge, demanding innovative therapeutic strategies to simultaneously address bacterial elimination, tissue regeneration, and controlled drug delivery. Inspired by the hierarchical structure of crocodile teeth, a bioinspired, 3D-printed microneedle patch integrating Mxene nanosheets and a polymerizable deep eutectic solvent (PDES) composed of vinyl pyrrolidone (VP), itaconic acid (IA), and N-isopropyl acrylamide (NIPAM) is developed. The resulting MXene-based eutectogel microneedle (MF-MXene@MN) combines photothermal responsiveness, antioxidant activity, and temperature-triggered drug release for photothermal conversion and reactive oxygen species (ROS) scavenging. The gradient-height design inspired by crocodile teeth enhances tissue adhesion, while DLP 3D printing enables personalized wound dressing geometries with <50 µm resolution. In vitro and in vivo studies demonstrated a 94.88% wound closure rate within 10 days, 3.2-fold increased angiogenesis, 68% reduced bacterial viability ( S. aureus : 32.59%; E. coli : 48.17% under NIR), and pH-/temperature-responsive mangiferin release (88.3% cumulative release via 5 NIR cycles). These synergistic functions promote wound healing, offering superior antibacterial ability, tissue regeneration promotion, and drug release control compared to traditional wound dressings and microneedle systems. This multifunctional platform integrates bioinspired design, stimuli-responsive materials, and additive manufacturing, providing a transformative solution for precision wound management.
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Kai Chen,Yunping Hu,Feng Wang,Mingxiang Liu,Pei Liu,Cong Li,Yongsheng Yu,Xiufeng Xiao,Qian Feng
The hydrogel-based epidermal sensors have attracted tremendous attention due to their versatile potential applications in soft robotics, personal healthcare monitoring, and electronic skins. However, it remains a critical challenge for hydrogel-based sensors to simultaneously achieve self-healing capability and adhesiveness for full-scale human motion biomonitoring. Herein, we proposed a multifunctional MXene/polyampholytes nanocomposite hydrogel. The main network of this hydrogel was formed by the one-step radical polymerization of cationic monomer and anionic monomer . The simultaneous strong and weak ionic bonds-based crosslinking inside this hydrogel endowed it outstanding stretchable, tough, self-healing, adhesive properties , while the introduction of MXene further guaranteed the excellent mechanical properties and conductivity of this hydrogel. Our further exploration of this MXene/polyampholytes in the application as wearable epidermal sensor strongly proved its durable accuracy and sensitivity for the detection of human motions. This epidermal sensor also could be assembled to the detector of the daily activity monitor of Attention-deficit hyperactivity disorder (ADHD) patients, which could be utilized to aid the ADHD treatment by remindering the patients to pay attention to their actions. Our work shed a new light on the development of eco-friendly wearable sensor for the personalized healthcare monitoring, human–machine interfaces, and artificial intelligence.
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DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Ruosong Li,Qiang Gao,Hongna Xing,Yangzhe Su,Hongming Zhang,Dan Zeng,Bingbing Fan,Biao Zhao
Polymer composites receive attentions for protecting from electromagnetic (EM) pollution. However, their EM wave (EMW) attenuation mechanism primarily results from reflection rather than absorption. Herein, we prepared poly(vinylidene fluoride)/cobalt (Co)/MXene composite foams that exhibited applicable impedance matching, enhanced EMW absorption and high-performance thermal conduction properties. With CO 2 -assisted foaming, a uniform foam structure was integrated into the polymer composites, and meanwhile, the introduced MXenes were partially oxidized and transformed into TiO 2 and amorphous carbon . The formed TiO 2 not only provided extra heterogeneous interfaces and capacitor-like structures in favor of dielectric polarization but also reduced the excessive electrical conductivity of the pristine MXenes to favor impedance matching. Accordingly, the EMW absorbing performance of the composite foam was enhanced with a minimum reflection loss of −45.6 dB at 4 mm when the filler content was only 12 wt% (6 wt% MXene and 6 wt% Co). Additionally, the synergism between the foam structure and TiO 2 nanocrystals resulted in improved thermal conductivity , ranging from 1.28 W/(m·K) to 1.36 W/(m·K), which were 2–6 times higher than that in the solid composite films . This study provided new insights into the simultaneously enhanced EMW absorption and dissipating heat ability in polymer composite foams with a low percolation threshold .
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DOI
高影响因子
Nano-Micro Letters
·
2021
·Vol. 14
·期 1
·1-10
·
IF 16.419
Shi Bao,Li La,Chen Aibing,Jen Tien-Chien,Liu Xinying,Shen Guozhen
Highlights
Ti 3 C 2 T x MXene-based coaxial zinc-ion hybrid fiber supercapacitors (FSCs) were fabricated with braided structure, which can be prepared continuously and present excellent flexibility and ultrastability.
A sports watch driven by the watch belts which weaved uses the obtained zinc-ion hybrid FSC and LED arrays lighted by the FSCs under embedding into textiles, demonstrating the great potential application in smart wearable textiles.
Abstract Zinc-ion hybrid fiber supercapacitors (FSCs) are promising energy storages for wearable electronics owing to their high energy density, good flexibility, and weavability. However, it is still a critical challenge to optimize the structure of the designed FSC to improve energy density and realize the continuous fabrication of super-long FSCs. Herein, we propose a braided coaxial zinc-ion hybrid FSC with several meters of Ti 3 C 2 T x MXene cathode as core electrodes, and shell zinc fiber anode was braided on the surface of the Ti 3 C 2 T x MXene fibers across the solid electrolytes. According to the simulated results using ANSYS Maxwell software, the braided structures revealed a higher capacitance compared to the spring-like structures. The resulting FSCs exhibited a high areal capacitance of 214 mF cm –2 , the energy density of 42.8 μWh cm −2 at 5 mV s −1 , and excellent cycling stability with 83.58% capacity retention after 5000 cycles. The coaxial FSC was tied several kinds of knots, proving a shape-controllable fiber energy storage. Furthermore, the knitted FSC showed superior stability and weavability, which can be woven into watch belts or embedded into textiles to power smart watches and LED arrays for a few days.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chenglong Li,Shuang Wang,Yinghe Cui,Xiaodong Wang,Zhipeng Yong,Dan Liang,Yue Chi,Zhe Wang
Two-dimensional transition metal carbides/nitrides (MXene) have excellent physicochemical properties, but the restacking of MXene films restricts their development towards flexible supercapacitors with high energy density . Introducing Polyaniline (PANI) into the MXene layer and expanding the interlayer distance of the MXene can reduce the effect of restacking on the MXene after compounding. However, despite the excellent electronic conductivity of the composited MXene/PANI (MP), its internal slow ionic kinetics becomes a fundamental limitation of the electrochemical performance after the MP loading increases. To compensate for this weakness, MP films are often scaled down to a few micrometers in size (<2 mg cm −2 ), which limits their development. Here, we introduce α-Fe 2 O 3 /MnO 2 (FM) into MP for the first time by designing a sandwich structure, which significantly improves the bulk capacitance. Due to a large number of active sites and good hydrophilic properties on the MXene surface, FM can interact with the MP. By complexing with MP, the accumulation and loss of FM can be reduced. At the same time, the effect of increasing loading on the electrochemical performance of MP can be compensated. The MXene-PANI/α-Fe 2 O 3 -MnO 2 /MXene-PANI (MP/FM/MP) electrode still exhibits high capacitive performance (661 F g −1 , 3138 mF cm −3 ) when the MP loading reaches 5 mg cm −2 , with excellent mechanical properties and increased flexibility. In addition, the corresponding symmetric supercapacitor also shows a remarkable energy density of 53.32 Wh·L −1 (17.45 Wh kg −1 ). This study provides a way to fabricate MXene-based electrodes with high loadings by designing sandwich-structured electrodes.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hankun Tan,Li Sun,Feng Xie,Jingjing Hu,Yaru Qu,Yihe Zhang
An alkali-treated MXene-SnS hybrid was prepared through hydrothermal methods. The Alk-MXene microplates provide highway for electronic transport, and the 3D wrinkled morphology ensures sufficient channels for Li + diffusion. The alkali treatment of MXene gives Alk-MXene@SnS enhanced binding strength, which allows the SnS nanosheets to remain firm binding with the Alk-MXene substrate during cycling and overcome capacity decay caused by large volume change. The synergy between the two components guarantees the hybrid excellent electrochemical properties by enabling high electronic/ionic conductivity and superior kinetic properties as evidenced by EIS, GITT tests and DFT calculation. As a result, the Alk-MXene@SnS retains specific capacities of 519 mAh/g after 100 cycles at 200 mA g −1 , and 330 mAh/g at the high rate of 8000 mA g −1 . In addition, a reversible capacity of 421 mAh/g can be provided after long term cycle test at 1000 mA g −1 for 800 cycles.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Pingan Song,Weiying Wang,Jingguo Li,Shaokui Cao,Jun Shi
Ti 3 C 2 MXene/gold nanorods (Ti 3 C 2 @AuNRs) nanosheets , a novel sandwich-like nanohybrids , have attracted extensive attention in the biomedical field due to its synergistically enhanced near-infrared (NIR) responsiveness and strong absorption in NIR region. In this study, hydroxyapatite (HAP) was self-assembled in situ around Ti 3 C 2 @AuNRs core and then combined with polydopamine (PDA) to prepare NIR-/pH- dual responsive Ti 3 C 2 @AuNRs/HAP/PDA nanocomposites. The obtained Ti 3 C 2 @AuNRs/HAP/PDA nanocomposites exhibited prominent photothermal conversion efficiency (38.6%) due to the synergistically enhanced NIR-responsive of Ti 3 C 2 @AuNRs. Ti 3 C 2 @AuNRs/HAP/PDA nanocomposites displayed excellent drug loading capacity (88.3%) for antitumor drug doxorubicin hydrochloride (DOX) because of the electrostatic interaction of negatively charged HAP nanorods and positively charged DOX, along with the distinct adhesiveness of PDA. In addition, the disintegration of HAP under acid medium and the strong NIR absorption of Ti 3 C 2 @AuNRs endowed the Ti 3 C 2 @AuNRs/HAP/PDA nanocomposites with pH-/NIR-dual responsive drug release behavior. In this paper, a feasible method is presented to prepare Ti 3 C 2 -based drug carriers with high drug loading capacity and remarkable multi-responsive drug release properties, which holds great promise in the field of remote controlled drug delivery and photothermal therapy.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·21771-21778
·
IF 12.732
Lan-Xin Li,Wu-Ji Sun,Hao-Yu Zhang,Jia-Liang Wei,Shu-Xian Wang,Jing-Hui He,Na-Jun Li,Qing-Feng Xu,Dong-Yun Chen,Hua Li,Jian-Mei Lu
The efficient electroreduction reaction of nitrate (NO3−RR) at low concentrations to ammonia is energetically favorable for ammonia production and environmentally essential to treat water contamination. Copper-based conjugated molecule electrocatalysts for the NO3−RR are advantageous in terms of their customizable Cu-coordinative micro-environment and facile preparation; however, they easily agglomerate due to their large π-conjugating system, which severely lowers the active site density and increases the internal resistance. This study demonstrates that Ti3C2Tx MXenes are promising supports to disperse and anchor a molecular catalyst (copper phthalocyanine, CuPc) to construct a CuPc@MXene electrocatalyst in order to significantly promote NO3−RR performance. 10% CuPc@MXene achieved higher ammonia selectivity (94.0%) and higher nitrate conversion (90.5%) compared to those of unsupported CuPc, and retained high ammonia selectivity (∼80%) after seven recycling tests. The combination of online differential electrochemical mass spectroscopy (DEMS) and density functional theory (DFT) calculations has showed that CuPc molecules are able to inhibit the hydrogen evolution reaction and effectively convert nitrate into ammonia through the ONH reaction pathway. The results showed that the MXene support is applicable to many metal phthalocyanines (MPcs, M = Fe, Co, Ni), demonstrating its potential in other electrochemical catalysis applications.
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高影响因子
Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Haiguang Gao,Rui Shi,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li,Xiaohui Hu
Two-dimensional Ti 3 C 2 T x MXenes exposing different active facets are introduced into MgH 2 , and their catalytic effects are systematically investigated in depth through experimental and theoretical approaches. Excluding factors such as interlayer space, surface functional groups and experimental contingency, the exposed facets is considered to be the dominant factor for catalytic activity of Ti 3 C 2 T x towards MgH 2 . More exposed edge facets of Ti 3 C 2 T x displays higher catalytic activity than that with more exposed basal facets, which also leads to different rate-controlling steps of MgH 2 in the de/hydrogenation process. The low work function, strong hydrogen affinity and high content of in situ metallic Ti for the edge facet contribute the high catalytic activity. This work will give insights into the structural design of two-dimensional Ti 3 C 2 T x MXene used for enhancing the catalytic activity in various fields.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1747-1761
·
IF 6.569
Keding Li,Yuqing Lei,Jun Liao,Yong Zhang
MXene-supported CuO nanocomposites (MCNs) were synthesized through an ice-crystal templating method without using any chemical modifiers. Nano-sized CuO particles were uniformly and stably attached to the surface of MXene nanosheets. The catalysis of the MCNs in ammonium perchlorate (AP) decomposition was studied and the results indicated that the MCNs as catalysts (2 wt%) could significantly decrease the high temperature decomposition (HTD) temperature of AP from 425.0 °C (pure AP) to 324.9 °C (AP with MCNs-3) and increase the exothermic heat from 295.2 J g−1 (pure AP) to 1272.9 J g−1 (AP with MCNs-3). With the increase of the mass ratio, the decomposition temperature decreased at first and then increased. When the ratio of MCNs-3 was 4 wt%, the HTD temperature of AP was reduced by as much as 114.4 °C and the exothermic heat was remarkably increased to 1360.6 J g−1. The high catalytic activity of MCNs-3 for AP thermal decomposition might be owing to the synergistic effect between MXene nanosheets and CuO nanoparticles. In other words, the results proved that the MXene in combination with CuO could be an effective way to enhance the catalytic performance of CuO in AP decomposition, which has potential application value in AP-based composite solid propellants.
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DOI
高影响因子
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