ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaoyu Wang,Yan Zhao,Huanchen Liu,Bo Dai,Xiaobo Wang,Wenjing Lou,Jun Yang
Solvent-free nanofluids were synthesized by grafting an organic oligomer shell onto the nanomaterial core, demonstrating significant liquid flow behavior at room temperature without any solvents. The synergistic effect within the solid–liquid combination found in solvent-free nanofluids positions them as potential lubricant candidates. In this study, solvent-free MXene@Fe3O4 nanofluids (MXene@Fe3O4 NFs) were successfully synthesized by loading Fe3O4 nanoparticles in situ onto MXene nanosheets, followed by covalent grafting with a silane coupling agent and a flexible long-chain polyetheramine. Its magnetic response properties were then assessed, highlighting its potential for recyclability. The tribological performance of MXene@Fe3O4 NFs as lubricants was examined under varying operating conditions with a focus on the morphology and chemical composition of the worn surface to elucidate the lubrication mechanism. The results reveal that MXene@Fe3O4 NFs, compared to MXene NFs and Fe3O4 NFs, exhibit optimal tribological performance. Additionally, even under severe loads, temperatures, or frequencies, MXene@Fe3O4 NFs show superior friction-reduction and wear-resistant properties. This phenomenon can be attributed to the fluidity endowed by the organic shell layer coupled with the synergistic tribological effects between MXene nanosheets and Fe3O4 nanoparticles. As solid–liquid lubricants with magnetic responsivity, MXene@Fe3O4 NFs present an effective strategy for high-performance lubricants synthesis.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jiaxin Wu,Wenfei Ai,Yue Long,Kai Song
Soft actuators possessing notable mechanical deformations, high sensitivity, and fast response speed play a crucial role in various applications, such as artificial muscles, soft robots, and intelligent devices. In this study, a smart humidity-driven actuator was successfully fabricated by utilizing MXene/cellulose nanofiber (CNF)/LiCl (MCL) through vacuum-assisted filtration with fast response speed and high sensitivity. Utilizing the excellent humidity responsiveness of MXene/CNF and the robust hygroscopicity of LiCl, the synergistic effect of these materials enhances the hygroscopic properties and response speed of the actuator. The MCL actuator demonstrates excellent actuation performance, fast deformation, and reliable cyclic stability. To illustrate the extensive potential of the soft actuator, a range of applications, from bionic devices to soft grippers and crawling actuators, are showcased. Remarkably, the crawling actuator demonstrates sustained crawling motion without necessitating a humidity switch, relying on the humidity gradient from water droplets, and exhibits spontaneous directional motions within a certain range, which makes it a promising prospect in the field of soft robotics.
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高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yitian Wu,Zhenluo Yuan,Yaojie Zhang,Qiuming Peng,Shumin Han,Yanping Fan,Baozhong Liu
Magnesium hydride (MgH2) has been recognized as a promising hydrogen storage material because of its low cost and high hydrogen capacity. However, the sluggish kinetics and high operating temperature hindered its utilization. Herein, vanadium-substituted titanium-based bimetallic MXene (Ti3–nVnC2) was prepared to boost the hydrogen storage efficiency of MgH2. The incorporation of 5 wt % Ti2.2V0.8C2 dramatically decreased the dehydrogenation temperature of MgH2 and improved its kinetics and cyclic stability. The MgH2-5 wt % Ti2.2V0.8C2 started to release hydrogen at 165 °C, and it released 7.0 wt % H2 in 30 min at 220 °C and took in 5.3 wt % H2 in 2 h at 75 °C, showing excellent kinetics. In addition, the activation energy of MgH2-added Ti2.2V0.8C2 was 80.81 ± 3.29 kJ mol–1, which is lower than that of the most Ti-/or V-based catalyst-doped MgH2 systems. Mechanism analysis reveals that the remarkably enhanced hydrogen storage performance is ascribed to the stable existence and uniform distribution of Ti-species (Ti0 and Titanium hydride) and V-species (V0 and V5+), which facilitated the rapid hydrogen absorption/desorption of MgH2 and ensured its stable hydrogen storage capacity. This study offers valuable perspectives for the assembly and design of bimetallic catalysts within the realm of solid-state hydrogen storage materials.
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高影响因子
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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高影响因子
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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高影响因子
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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Lu,Hongpo Liu,Shiquan Li,Jianhua Zhu,Yunfeng Chao,Zhuosen Wang,Yapeng Tian,Xinwei Cui
Sodium selenium (Na-Se) batteries are considered promising candidates for next-generation energy storage devices due to their high volumetric energy density. However, the Se cathode still faces the problems of the shuttling effect and sluggish selenium reduction kinetics. Improving the surface adsorption and catalytic process of selenium cathode can greatly solve the above issues and achieve excellent performance to enhance the application of Na-Se batteries. Herein, experimental and theoretical simulation results indicate that the boron and defects co-doped MXene (BD-MXene) could initiate the redistribution of electrons and improve the surface polarity, promoting chemical adsorption, thus effectively suppressing the shuttle effect. More importantly, the BD-MXene can promote the conversion between polyselenide, accelerating the electrochemical reaction kinetics of Sodium polyselenide. As a result, the obtained Se@BD-MXene exhibits a high rate performance of 502 mAh g −1 at 50 A g −1 (calculated based on Se@BD-MXene) and excellent cycling stability with a decay per cycle of 0.001 % over 4500 at 10 A g −1 . This work provides a viable strategy to design Se cathodes for Na-Se batteries with high-rate capability and long-term cycling.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Li,Bita Farhadi,Miaomiao Liu,Peiru Wang,Jiayi Wang,Yaoyao Zhang,Guoxiang Ma,Runnan Huang,Jiayi Zhao,Kai Wang,Yao Tong
The advancement of interface engineering has demonstrated remarkable efficacy in overcoming the primary impediment associated with sluggish reaction kinetics in supercapacitor electrodes. In this investigation, we employed a facile co-precipitation method to synthesize NiCoMoO 4 /MXene heterostructures utilizing Ti 3 C 2 T x MXene nanosheets as carriers. This heterostructure inhibits the restacking of MXene nanosheets and simultaneously enhances the exposure of electrochemically active sites in NiCoMoO 4 nanorods, thereby mitigating the reduction in specific capacitance resulting from volumetric fluctuations. The NiCoMoO 4 /MXene electrode, possessing pseudo-capacitance properties, demonstrates an impressive level of specific capacitance, exceptional performance across various charging rates, and consistent behavior throughout repeated cycles. By optimizing the mass ratio, this electrode achieves a specific capacity of 1900 F/g under a current density of 1 A/g. Even after enduring 10,000 cycles at a significantly higher current density of 5 A/g, it still maintains an impressive retention rate of 94.73 %. Our density functional theory (DFT) calculations indicate that the enhanced electrochemical performance can be attributed to the improved electronic coupling within the NiCoMoO 4 /MXene heterostructure. The integration of NiCoMoO 4 /MXene cathode and activated carbon (AC) anode with an alkaline gel electrolyte containing potassium ferricyanide in flexible quasi-solid-state supercapacitors (FSSCs) results in exceptional electrochemical performance and flexibility. These FSSCs demonstrate a maximum energy density of 72.89 Wh kg −1 at a power density of 850 W kg −1 , while maintaining an impressive power output of 16,780 W kg −1 with an energy density of 37.28 Wh kg −1 . Based on these outstanding properties, it is evident that the NiCoMoO 4 /MXene heterojunction possesses significant advantages as electrode material for supercapacitors, and the fabricated FSSCs devices pave a new pathway for flexible electronic devices.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 17
·25273-25286
·
IF 0
Chen Junxia,Yang Zhenzhen,Li Weigang,Yang Yuying,Zhu Feng,Huo Zongli,Zhou Qing
The poor conductivity, poor stability, and agglomeration of iron-based metal organic framework MIL-88A(Fe) limit its application as persulfate (PS) activator in water purification. Herein, MXene-supported MIL-88A(Fe) composites (M88A/MX) were synthesized to enhance its adsorption and catalytic capability for tetracycline (TC) removal. Scanning electron microscope (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and X-ray photoelectron spectroscopy (XPS) were used to characterize prepared materials, confirming the successful attachment of MIL-88A(Fe) to the surface of MXene. M88A/MX-0.2 composites, prepared with 0.2 g MXene addition, exhibit optimal degradation efficiency, reaching 98% under conditions of 0.2 g/L M88A/MX-0.2, 1.0 mM PS, 20 ppm TC, and pH 5. The degradation rate constants of M88A/MX-0.2 were 0.03217 min −1 , which was much higher than that of MIL-88A(Fe) (0.00159 min −1 ) and MXene (0.00626 min −1 ). The removal effects of reaction parameters, such as dosage of M88A/MX-0.2 and PS; initial solution pH; and the presence of the common co-existing constituents (humic acid and the inorganic anions) were investigated in detail. Additionally, the reuse of M88A/MX-0.2 showed that the composites had good cycling stability by recurrent experiments. The results of electron paramagnetic resonance (EPR) and quenching experiments indicated that ·OH, ·SO 4 − , and ·O 2 − were involved in the M88A/MX-0.2/PS system where persulfate oxidation process was activated with prepared M88A/MX-0.2. In addition, the intermediates of photocatalytic degradation were determined by HPLC–MS, and the possible degradation pathways of the target molecules were inferred. This study offered a new avenue for sulfate-based degradation of Fe-based metal organic framework.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Ling Zhang,Jiaying Bi,Zhikun Zhao,Yuxin Wang,Daobin Mu,Borong Wu
High energy density Lithium-Sulfur (Li-S) batteries have attracted significant attention, although their severe energy decay and rate capability loss still hinder their large-scale application. Two-dimensional (2D) MXene materials can immobilize polysulfides via strong chemisorption and physical hinderance. However, MXene nanosheets tend to restack in solution, losing their favorable electronic conductivity due to functional substituents on the surface. In this work, a three-dimensional (3D) MXene material is fabricated with MXene nanosheets and carbon-poly (diallyl dimethyl ammonium chloride) nanoparticles using self-assembly strategy. As the sulfur host, the 3D material not only prevents MXene nanosheets from restacking, but also ensures to provide a framework to confine S and raises the utilization of sulfur. As a result, the sulfur cathode demonstrates a highly reversible specific capacity of 1016.8 mAh g −1 at 0.2 C, excellent rate capability, and long-term cycling stability, with the capacity decay rate of only 0.075% per cycle over 600 cycles at 1 C.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Long Jiao,Fuquan Ma,Xiaotong Wang,Zhimin Li,Zhongai Hu,Qing Yin
Asymmetric supercapacitors (ASCs) need positive and negative electrodes to produce a larger redox peak position difference to achieve a higher energy density. Here, 2,8-quinolinediol (QD) is adopted to modify reduced graphene oxide (rGO) and prepare an organic molecule electrode (OME), in which the Faraday reaction occurs in a more positive potential range. The electrochemical tests show that the optimized OME (QD/rGO-0.75) releases a high special capacitance (371 F g–1 at 5 mV s–1) and exhibits an excellent rate capability (86.8% of the initial value at a scanning rate multiple of nearly 20 times). Meanwhile, an MXene (Ti3C2Tx) with a relatively negative potential is prepared. QD/rGO-0.75 and Ti3C2Tx are, respectively, used as positive and negative electrodes to assemble an ASC. The measurements indicate that the assembled ASC is able to store charge within a wide voltage window of 1.6 V in the 1 M H2SO4 electrolyte and exhibit better energy storage performance. Furthermore, the device delivers an excellent cycling stability (83.5%, over 10,000 cycles). The two series-connected devices can light 37 red light-emitting diodes, indicating their potential application.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
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