JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Changqin Gao,Shaohan Hu,Yuanjia Ding,Yucheng Wang,Zong-Xiang Xu
The surfaces of MXene etched via chemical etching feature randomly diverse terminals, which creates an uneven surface potential. The non-uniform potential promotes disordered stacking of nanosheets, which in turn precipitates a rapid deterioration in the electrochemical performance of MXene-based electrodes at high mass loadings (ML). In this study, L-ascorbic acid (AA) is used to block polymerization of dopamine (DA), forming a uniform polydopamine (PDA) coating on MXene surfaces, which corrects the surface potential distribution. And we add borax to do a further modification to increase stabilization. Characterization results demonstrate that introducing AA creates a more uniform PDA coating and surface potential distribution, which not only increases the interlayer spacing but also improves the in-plane stacking orderliness of the nanosheets, which is beneficial for electrolyte transport. The as-prepared electrode retains high areal capacitance (5.6 F cm −2 ) at 10.0 mg cm −2 , and the resulting symmetric device exhibits outstanding cycling stability. This study offers an insight for optimizing the surface potential and orientation of MXene, paving the way toward high ML electrode applications.
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Theranostics
·
2023
·
IF 12.4
Hongchuan Wang,Na Mu,Yaqi He,Xiaoguang Zhang,Jie Lei,Cao Yang,Liang Ma,Yong Gao
Background: The current clinical treatment of osteomyelitis is limited by the emergence of drug-resistant bacteria, which often leads to the failure of traditional antibiotic treatment and large bone defects. Sonodynamic therapy (SDT) is a new strategy that is widely used to overcome the problem of bacterial resistance to antibiotic therapy as well as poor tissue penetration using near-infrared light in photodynamic therapy (PDT). Therefore, it is necessary to develop a new sonosensitizer that can kill bacteria and promote bone repair. Methods: Herein, we developed a sonosensitizer, porphyrin metal-organic framework (HNTM), with a Schottky junction modified by Ti 3 C 2 nanosheets (HN-Ti 3 C 2 ) for highly efficient sonodynamic therapy of osteomyelitis and bone regeneration. Results: Ti 3 C 2 greatly improves the acoustic catalytic performance by rapidly transferring the charge carriers generated by HNTM under ultrasound (US) irradiation, which killing drug-resistant bacteria through the generation of large amounts of reactive oxygen species (ROS). And HN-Ti 3 C 2 shows excellent 99.75% antibacterial effectiveness against MRSA. In addition, HN-Ti 3 C 2 generates a sonocurrent under low-intensity US to promote the repair of bone defects for a long time period. Mechanistic research using CCK-8 and RNA-seq showed that HN-Ti 3 C 2 nanocomposites can promote the proliferation of stem cells by regulating the cell cycle, DNA replication, and apoptosis. In addition, after low-intensity US irradiation, HN-Ti 3 C 2 promotes osteogenic differentiation via some key signaling pathways, including the calcium, Wnt, and TGF-beta signaling pathways, according to the Kyoto Encyclopedia of Genes and Genomes (KEGG). In a MRSA-infected rat tibial osteomyelitis model, HN-Ti 3 C 2 successfully eliminated the infection and significantly improved bone regeneration under US irradiation. Conclusion: This study indicates that engineered HN-Ti 3 C 2 is a distinctive nanocomposite for successful osteomyelitis treatment.
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MICROCHIMICA ACTA
·
2025
·Vol. 193
·期 1
·15
·
IF 5.3
Zhang Yan,Yan Yuting,Huang Yue
An innovative electrochemical biosensor is proposed for the sensitive detection of ofloxacin (OFL) by integrating exonuclease I (Exo I)–assisted recognition-transduction strategy into the MXene/AuNP-enhanced electrochemical platform. Through ingenious design, the presence of OFL triggers the competitive displacement reaction and enables Exo I to hydrolyze the released single-stranded DNA probe containing the sequence of Pb 2+ -DNAzyme, protecting the signal probes on the electrode surface from DNAzyme cleavage, which eventually brings about a remarkable electrochemical signal positively related to the concentration of OFL. MXene/AuNPs with excellent conductivity, large specific surface area, and good chemical stability are employed as the electrode substrate to efficiently accelerate charge transfer and increase the loading capacity for signal probes, leading to the enhancement of signal output and endowing the biosensor with high sensitivity, rapid response, and fine robustness. Taking advantage of OFL recognition–initiated Exo I hydrolysis to DNAzyme, the electrochemical platform with “signal-off/on” mode can detect OFL with good specificity and reduced background interference. Benefiting from the synergistic effect of the involved sensing elements, the developed electrochemical biosensor achieves a low detection limit of 0.47 pg mL −1 with a broad linear range and exhibits satisfactory detection performance in real food samples, indicating potential practical applicability in food safety monitoring. Graphical
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MOLECULES
·
2025
·Vol. 31
·期 1
·51
·
IF 4.6
Wenfeng Zhu,Xuwu Luo,Junfeng Xie,Yaoming Zhang,Mifeng Zhao,Junhui Wei,Lei Li,Houbu Li,Peipei Li
With the rapid advancements in industrial technology, the demand for high-performance lubrication has surpassed the capabilities of traditional solid or liquid lubricants. In this study, a novel MXene-based solvent-free lubricating nanofluid was developed through the surface functionalization of Ti3C2TxMXene nanosheets. This innovative material combines the superior mechanical properties of solid Ti3C2TxMXene nanosheets with the stable flow and rapid self-repairing capabilities of liquid lubricants. The successful synthesis of the MXene-based solvent-free nanofluid lubricant was confirmed through a series of characterization techniques, and it was demonstrated that this nanofluid maintained excellent flowability at room temperature. Subsequent tribological tests revealed that the friction coefficient and the wear performance of the MXene-based solvent-free nanofluid lubricant improved with increasing mass concentrations of Ti3C2TxMXene nanosheets under consistently applied loads. These results indicate that the MXene-based solvent-free nanofluid lubricant significantly reduces friction and wear, showcasing its potential as a high-performance lubricant for industrial applications.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Yitong Guo,Chenxiao Wang,Xianju Shi,Yanhuan Chen,Lifang Wang,Yanan Liu,Yuqian Wang,Xiaoning Wang,Yukai Chang,Aiguo Zhou
In this paper, a green and efficient low-concentration ammonium fluoride etching strategy is developed for the synthesis of two-dimensional highly pure Mo 2 CT x MXene. Using the Mo 2 Ga 2 C MAX phase as the precursor, highly pure Mo 2 CT x MXene was prepared via hydrothermal etching with a 1 M NH 4 F aqueous solution at 160 °C for 12 h. By employing a slow-release fluorine source mechanism, the NH 4 F concentration was maintained at 1 M, significantly reducing toxicity risks and improving operational safety while providing a safe pathway for large-scale MXene production. The structural characterization of the material revealed that the as-prepared Mo 2 CT x MXene exhibits a typical two-dimensional layered structure, with microscopic morphology and crystal parameters consistent with those obtained by conventional etching methods. As an anode material for lithium-ion batteries, the Mo 2 CT x MXene delivered an initial discharge specific capacity of 873.5 mAh g −1 at a current density of 0.05 A g −1 , and retained 33.7 mAh g −1 after 100th cycles of high-rate cycling at 0.5 A g −1 . This represents the first application of a low-concentration NH 4 F etching system for preparing Mo 2 CT x MXene. The findings of this study not only enhance the safety of MXene synthesis but also provide new research directions for the development of green synthesis processes for Mo 2 CT x MXene.
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Gels
·
2025
·Vol. 11
·期 12
·1000
·
IF 5.3
Haiyan Zhao,Ziqi Wang,Chaohao Yin,Chu Chen,Li Wang,Xin Zhang,Zhuo Wang
In this work, a flexible, stretchable, tough, highly ionic conductive, and anti-freezing hydrogel based on acrylamide/two-dimensional transition metal carbide (MXene)/montmorillonite (MMT) was precisely designed. In the hydrogel, MXene and MMT acted as both cross-linking agents and conductive fillers, delivering high stretchability (1037%) with a strength of up to approximately 67 kPa and high conductivity. As a result, the usual trade-off between conductivity and mechanical properties of hydrogels could be alleviated to some extent. Therefore, the hydrogel could be used as an electrolyte for supercapacitors (SCs) and strain sensors to monitor physical signals. The hydrogel-based SC exhibited outstanding electrochemical performance over a wide temperature range. Moreover, it could easily withstand various deformations, such as bending, twisting, and compression. The hydrogel also exhibited excellent sensing properties, with a short tensile response time and a high-sensitivity factor (GF = 14.8) in the 0–400% range (0 denotes the original state, where both the strain and stretch are zero as there is no deformation at this point). Due to its high conductivity, the prepared hydrogel could be used as a flexible electrode to replace commercial electrodes and record electromyographic (EMG) signals. This work proposes a novel approach for balancing the conductivity and mechanical strength of hydrogels.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Junzheng Chen,Xue Lv,Xikun Zhang,Huiwen Jia,Yanmin Ma,Wang Xu,Xiaoning Yang,Di Fang,Shurui Yi
Conductive hydrogels are valued for their flexibility and sensitivity for flexible wearable sensors, but they typically focus on strain sensing and lack features such as fast temperature response. In addition, discarded sensors can cause environmental problems. Based on this, we developed a novel G 2 B 3 M 4 hydrogel using NIPAAm, AM, PDA@BN, MXene, and SA to achieve dual response to temperature and strain as well as reuse after disposal. The addition of the copolymerized hydrophilic monomer AM successfully changed the lowest critical solution temperature (LCST) of G 2 B 3 M 4 to approach the normal body temperature. In addition, the excellent dispersion of PDA@BN in the G 2 B 3 M 4 hydrogel not only improved its temperature sensitivity (TCR = −1.953 %/°C) but also resulted in a high stress (730.38 kPa), strain (6994.18 %), elasticity (49.14 kPa) and toughness (2644.17 KJ/m 3 ). In addition, the abundant catechol groups, amino groups and carboxyl groups in G 2 B 3 M 4 hydrogel not only make it have good adhesion to various substrates but also can be used as a template to reduce Ag + to Ag NPs to serve as a catalyst for the efficient degradation of dye wastewater. The hydrogel has good application prospects in the field of flexible sensors.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Han Wang,Xinming Wu
As an emerging family of conductive 2D materials, MXenes, have gained much attention as electrode in supercapacitor devices. Their representative, Ti 3 C 2 T x , usually achieves significant capacitance in common acid electrolyte. In this work, through a simple dipicolinic acid (DC) intercalation strategy, Ti 3 C 2 T x -DC can obtain outstanding capacitance in a more environmentally friendly KCl aqueous electrolyte. As a consequence, as an electrode for supercapacitor, Ti 3 C 2 T x -DC exhibits an outstanding specific capacitance of 353 F g −1 at a current density of 0.5 A g −1 in KCl aqueous electrolyte (MXene-DC/KCl), which is higher than MXene of 320 F g −1 in H 2 SO 4 electrolyte (MXene/H 2 SO 4 ) and MXene of 127 F g −1 in KCl aqueous electrolyte (MXene/KCl). Moreover, the MXene-DC/KCl shows an impressive cycling stability with about 100% capacitance retention after 10,000 cycles at 1.0 A g −1 . Such excellent electrochemical performance in a greener electrolyte is mainly attributed to the interlayer hydration of DC and counter ion adsorption of electrolyte.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Changjun Xia,Xushuai Chen,Jincui Gu,Panpan Zhang,Chunjia Luo,Ruiqi Zhao,Xiaohan Niu,Luke Yan
Weak intersheet interactions induce interlayer swelling in 2D MXene membranes, limiting their otherwise promising practical application in water purification. Herein, we developed an anti-swelling MXene-based membrane for water purification. Supramolecular hydrogen bonding between MXene and graphitic carbon nitride (CN) nanosheets enabled the formation of a tightly packed structure. Concurrently, covalent interactions involving polydopamine (PDA) and polyethyleneimine (PEI) enhanced cross-linking, which created a nanoconfined interlayer space to suppress swelling. Notably, the MXene/CN@PDA/PEI membrane maintained a stable interlayer spacing of 15.27 ± 0.08 Å even after 700 h of water immersion—outperforming most reported MXene-based membranes. Furthermore, its broad light absorption and narrow bandgap (~2.10 eV) enabled superior self-cleaning performance. In cyclic tests, it retained ~90.7 % flux recovery after 40 h, demonstrating that nanoconfinement effectively suppresses swelling and stabilizes active sites. This study presents an effective approach for developing high-performance MXene membranes featuring anti-swelling and self-cleaning capabilities, aimed at sustainable water purification.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Gu Jianfeng,Li Donghui,Ren Yichen,Li JiaHao,Ji Xinyi,Liu Xue,Zhan Weiqing,Zhao Xialian,Wang Quan,Liu Xiewen,Wang Huihui,Zhang Xinmin,Zhu YinBo,Yue Zhao,Wu Heng-An,Chen Yongsheng,Liang Jiajie
Despite high porosity, deer antlers exhibit high strength and toughness from synergistic hierarchical structures. MXene fibers offer promising applications but suffer from poor mechanical properties due to internal voids and weak interfaces. Conventional strengthening removes voids and enhances interlayer interactions, but yields rigid, brittle fibers. Here, we tackle this trade-off by constructing strong and slidable double-interfaces that can cooperate with internal micropores in MXene fibers to mimic the delicate structure of deer antlers. These voids, typically considered defects, instead enhance load-bearing and energy dissipation. At an optimal porosity of ~21%, the MXene fibers achieve high tensile strength, ductility, and toughness of 1060.1 ± 33.5 MPa, 34.2 ± 1.8%, and 136.1 ± 6.5 MJ m - 3 , respectively. Notably, this MXene-matrixed fiber shows elasticity and high durability and is even softer than polymer fibers, while maintaining an electrical conductivity of over 10500 S cm -1 after being coated with silver nanowires. This biomimetic approach enables robust, multifunctional fibers for smart textiles.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Peilin Zuo,Zhi Wan,Mingxin Ren,Zhiyuan Chen,Zhenghang Tian,Jizhou Yang,Gangfeng Li,Luna Yang,Peng Hu,Feng Teng,Haibo Fan
MXene has gained prominence as a prospective electrode material for supercapacitors owing to its unique layered architecture, high electrical conductivity and intrinsic hydrophilicity. However, the intrinsic tendency for severe interlayer restacking in MXene markedly restricts the exposure of electrochemically active surface sites. In this work, we prepare a ZnO quantum dots/MXene composite film electrode with a 0D-2D structure and evaluate its electrochemical performance in neutral aqueous electrolyte (1.5 M Na 2 SO 4 ). The synergistic interfacial interaction between ZnO QDs and Ti 3 C 2 T x nanosheets facilitates enhanced specific surface area and the optimized utilization efficienc of electroactive site. Notably, even with an average size of 16.3 nm, the incorporated ZnO nanoparticles with a relatively high degree of dispersion still contribute significantly to the enhanced performance of the Ti 3 C 2 T x electrode. This structural configuration endows the ZnO QDs/Ti 3 C 2 T x composite with superior energy storage capability (305 F g −1 at 0.5 A g −1 ) and remarkable rate performance, outperforming pristine Ti 3 C 2 T x electrodes (125.87 F g −1 ). After 5000 charge-discharge cycles at a current density of 10 A g −1 , the capacitance retention rate is 96.79 %, showing excellent cycle stability. The quasi-solid-state symmetric supercapacitor based on ZnO QDs/Ti 3 C 2 T x exhibits a high energy density of 8.2 Wh kg −1 at a power density of 349 W kg −1 . Notably, even after 5000 cycles, the SSCs exhibit a capacitance retention rate of 93.44 %, demonstrating outstanding cycling stability.
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Xuejiao Sun,Xiang Ji,Xiaoxuan Zhang,Dongmei Li,Zhongzhen Tian
a MXene/NiMoO 4 /NF composite electrode was successfully prepared by synthesizing nanoneedle NiMoO 4 on nickel foam (NF) via a hydrothermal method, followed by spray-coating with a MXene dispersion. The formed three-dimensional porous network provided a hierarchical catalytic interface with abundant active sites. Electrochemical tests demonstrated outstanding oxygen evolution reaction (OER) activity with overpotentials of 153 mV and 241 mV at 10 and 50 mA cm −2 , respectively. The Tafel slope of 38 mV dec −1 indicated rapid reaction kinetics, with the enhanced performance attributed to the synergistic effect between MXene and NiMoO 4 and the hierarchical interface structure.
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