JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Tian Zhang,Limei Pan,Huan Tang,Fei Du,Yanhua Guo,Tai Qiu,Jian Yang
Herein, enhanced exfoliation and large-scale delamination of two-dimensional (2D) Ti 3 C 2 T x MXene using etchant of HCl + LiF, instead of HF, in which both etching and intercalation were achieved in exfoliation process, were thoroughly investigated with the focus on the effects of two critical factors, reaction temperature and washing solution. Increasing etching temperature promotes the exfoliation process, i.e., the transformation from Ti 3 AlC 2 to multilayer Ti 3 C 2 T x MXene, whereas simultaneously results in an aggravated surface oxidation of MXene layers formed after the extraction of Al. As a result, delamination ratio increases firstly and then decreases, and the samples etched at 35 °C show the highest delamination ratio. Compared with the distilled water, washing the exfoliation products using ethanol significantly improves the delamination ratio of Ti 3 C 2 T x MXene by co-intercalation of larger alcohol molecule and more impurity ions and a large scale delamination of Ti 3 C 2 T x MXene with a delamination ratio as high as 29.2% was obtained by simple sonication for 1 h, without additional intercalation step required, after washing using ethanol. The possible exfoliation reactions by HCl + LiF solution were proposed. Using the as-fabricated stable suspensions of delaminated Ti 3 C 2 T x flakes, flexible, free-standing Ti 3 C 2 T x papers with tailored thickness, hydrophilic surface and excellent conductivity, typically 2 × 10 5 S/m at 5 μm in thickness, were prepared. As anode for lithium ion batteries , the delaminated Ti 3 C 2 T x MXene obtained reversible capacities of 226.3 mAh g −1 , 137.9 mAh g −1 ,102.0 mAh g −1 and 47.9 mAh g −1 respectively at the current density of 100, 300, 1000 and 3000 mA g −1 , which are superior to those of the Ti 3 C 2 MXene prepared by conventional HF process.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Dongyi Xian,Rui Luo,Qiaoni Lin,Liqing Wang,Xiaoqian Feng,Yuwei Zheng,Liming Lin,Jiaying Chi,Yilang Yan,Guilan Quan,Tingting Peng,Zejun Xu,Chuanbin Wu,Chao Lu
Antimicrobial peptides show promise in enhancing photothermal therapy, but their application is often limited by the challenge of constructing a delivery system that balances efficacy and safety. Our research demonstrated that the bactericidal efficacy of V 2 C MXene-mediated photothermal therapy is enhanced in a concentration-dependent relationship with the introduction and coating of the antimicrobial peptide ε-polylysine (EPL). EPL exhibited a dual role in enhancing bacterial binding and disrupting bacterial membranes, thereby increasing heat transfer efficiency and reducing bacterial resistance to photothermal ablation. The core strategy of this study was to exploit the combined membranolytic-photothermal effect of EPL and V 2 C by extensively applying EPL while regulating V 2 C nanosheets usage to prevent overheating. This approach aims to achieve potent bactericidal efficacy through photothermal therapy below 60 °C. Consequently, we developed dissolving microneedles incorporated with V 2 C nanosheets, where EPL served as the antimicrobial agent and primary matrix, increasing its loading capacity and minimizing the need for inactive excipients. Notably, this microneedle achieved a 99.9 % reduction in the abundance of methicillin-resistant Staphylococcus aureus on infected skin after a single application and resulted in a 92-fold reduction in the bacterial load compared to the group treated with commercial Bactroban ointment, with no apparent toxicity to the mice.
研究领域:
生物医学工程
·
微生物学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Xuefeng Zhang,Haiqin Lin,Huaqing Peng,Wenrui Li,Ting Wang,Jianpeng Li,Qiancheng Xiong,Yong Liu,Xudong Liu
MXenes have immense potential in electrochemical energy storage owing to their outstanding physicochemical properties such as their oxygen-containing groups that impart additional pseudocapacitance to acidic electrolytes. However, during electrode assembly, MXene nanosheets undergo restacking because of hydrogen bonding and van der Waals forces, which causes electrolyte ions to traverse long diffusion pathways between the long and narrow nanosheets. Exploiting the oxidative properties of Ti 3 C 2 T x , a hierarchical porous MXene film with micro-, meso - and macroporous structures was successfully prepared using a simple hydrothermal oxidation and etching process to create micro- and mesoporous structures, followed by ice templating to prepare three-dimensional (3D) linked macroporous structures. Because these hierarchical pores have synergistic effects on electrochemical activity and electrolyte ion diffusion, the film attained a specific capacitance of 539F/g at a current density of 2 A/g when it was used as a supercapacitor electrode, which corresponds to one of the highest values reported for MXene-based electrodes. The film retained 83% of its specific capacitance when the current density was increased to 40 A/g, and exhibited excellent cycling stability. By using this multi-porous MXene design, synergistic improvement in ion diffusion was successfully realized and thus a new strategy to prepare high-performance supercapacitor electrode materials was developed.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lili Cao,Yuxiang Chen,Shane Feng,Yanli Su
To reduce the dielectric loss of MXene/PVDF composites near the percolation threshold, a MnO 2 /MXene hybrid structure was successfully synthesized via an ultrasonic-assisted solution process, and MnO 2 /MXene/PVDF composite films were prepared by a solution casting method. The effects of different amounts of MnO 2 nanorods on the microstructure, thermal stability, dielectric properties and mechanical properties of the composite films were investigated. At 1 kHz, the dielectric constant of 7 wt% MnO 2 /MXene/PVDF is 37.3, and the dielectric loss is as low as 0.05. The electric modulus curve, Nyquist curve and equivalent analog circuit of the composites revealed strong interface polarization and microcapacitance effects in the composites. In addition, the composite films exhibit excellent mechanical properties, and the storage modulus of the composite film loaded with 10 wt% MnO 2 is 1990.5 MPa, which is 3.44 times that of pure PVDF. This study confirms that incorporating MnO 2 nanorods into MXene/PVDF composites is an effective approach for fabricating high-performance dielectric composites.
研究领域:
材料科学
·
电介质材料
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Chengbin Liu,Sibei Hao,Xiaoyan Chen,Boyang Zong,Shun Mao
MXenes, a group of emerging two-dimensional (2D) transition metal carbides or nitrides, have attracted wide interest due to their unique structures and properties. Their stability and applicability in different media especially in an alkaline environment are directly associated with their potential applications and are not yet explored. Herein, a field-effect transistor (FET) is fabricated with single/double-layer Ti3C2Tx MXene. The Ti3C2Tx FET indicator shows a fast (∼1 s), sensitive, and selective response to alkali. Moreover, the device can work even in a high-salinity (2 M NaCl) environment, suggesting its high anti-interference ability for alkali in a high-ionic-strength environment. Using an in situ morphological image evolution study, it is demonstrated that the response signal results from alkali-induced denaturation of Ti3C2Tx nanosheets. The Ti3C2Tx-based alkali FET indicator and systematic evaluation on alkali-induced structure evolution of Ti3C2Tx provide essential insights into MXene-based FETs and future applications of MXene in alkaline environments.
研究领域:
材料科学
·
电子器件
·
化学
✓ 已验证
DOI
高影响因子
Engineering
·
2024
·
IF 10.1
Zong Lu,Haoyu Wu,Yanying Wei,Haihui Wang
Transport channels with ultrahigh K + selectivity over other ions play a crucial role for living beings, but constructing ionic channels with promising K + selectivity and permeability remains a challenge. Here, an asymmetric bilayer membrane based on MXene (Ti 3 C 2 T x ) lamellar channels consisting of a recognition layer (RL) on top of an enhancement layer (EL) exhibits an amazing Matthew effect: amplification of the preferred transport of K + , resulting in an excellent K + -separation performance. The K + ion is selected by the 1-aza-18-crown-6 ether-modified RL, owing to preferential affinity energy, and then rapidly transported as a hydrated ion through the EL, based on the confinement effect. Other undesired ions such as Na + are hindered from entering the RL by the preferred K + occupation of the crown ether. The MXene (Ti 3 C 2 T x )-based Matthew membrane presents high K + -permeation rates of 0.1–0.2 mol∙m –2 ∙h –1 , with a significant K + /Na + selectivity of 5–9. The molecular separation mechanism of the Matthew membrane is investigated deeply to explore the nature of the Matthew amplification effect on K + sieving, where the precise matching of the RL and EL within the membrane governs the fast K + permeation with good selectivity. The asymmetric structure of our Matthew membrane is the key to understanding the biological function of ion channels for precise and fast ion transport, which will guide us in the creation of artificial ion channels or membranes.
研究领域:
材料科学
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生物物理学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chao Zhang,Yi Wang,Yi-Lin Liu,Qingming Zeng,Yanjun Wen,Lulin Guo,Haodong Chen,Xinyi Xie,Qingyi Zeng
An innovative MnO/Ti 3 C 2 MXene heterostructure, consisting of three-dimensional (3D) MnO nanosheet array directly assembled on two-dimensional (2D) Ti 3 C 2 MXene nanosheets, was synthesized via a simple hydrothermal-annealing strategy for uranium elimination. This unique 3D/2D heterostructure derived substantially high specific surface area (311.9 m 2 /g) and exposed considerable amount of surface oxygen groups, including surface lattice M–O and adsorbed –OH. Through a comprehensive exploration encompassing adsorbent dosage, pH, ionic strength, initial U(VI) concentration, and environmental conditions, the MnO/Ti 3 C 2 MXene heterostructure demonstrated an extraordinary proficiency and specificity in the removal of U(VI). This composite exhibited an outstanding adsorption capacity of 862.1 mg/g, with a removal efficiency of 99.7 % and rapid kinetics (above 90 % within 20 s). The kinetic study indicated the adsorption process followed chemisorption dynamics and single-layer adsorption behavior. Comprehensive analyses validated the structural integrity and confirmed the successful uranium adsorption via strong interaction between UO 2 2+ and surface unsaturated oxygen groups. Notably, the MnO/Ti 3 C 2 MXene maintained excellent recyclability, highlighting its potential for large-scale applications. It emerges as a promising candidate for uranium removal, offering insights for optimizing composite materials in diverse environmental conditions and fostering advancements in water purification technologies.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Suhang Hou,Libo Wang,Lina Huang,Bo Wang,Weiwei Zhang,Jian Xie,Yihang Feng,Xinxin Cao,Aiguo Zhou
Polyimide (PI) is well known for its excellent thermal stability and mechanical strength, but its limited thermal conductivity and tribological performance restrict broader applications under harsh conditions. In this work, Ti 3 C 2 T x MXene nanosheets were incorporated into a PI matrix via in-situ polymerization to fabricate high-performance Ti 3 C 2 T x /PI nanocomposites with uniform filler dispersion. The thermal conductivity of the composite reached 1.99 W m −1 K −1 at 20 wt% MXene loading—an increase of 123% over pure PI. The thermal degradation temperature at 10% weight loss (T d10 ) also improved from 577.6 °C to 587.0 °C. Additionally, both storage modulus (E s ) and glass transition temperature (T g ) increased, indicating improved rigidity and thermal resistance. Tribological tests at room temperature and 200 °C revealed that the addition of 5 wt% MXene effectively reduced the coefficient of friction (COF) by 6.52% and 5.37%, respectively. The wear rate was also significantly reduced—by 83.41% at room temperature and 39.66% at 200 °C. These enhancements are attributed to the formation of a continuous and robust transfer film composed of MXene, oxides, and friction-induced organic products. This work provides a promising route for high-performance PI-based composites with improved thermal and tribological functionalities.
研究领域:
材料科学
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热管理
·
摩擦学
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Ruijin Fan,Guanwang Chen,Nianben Zheng,Zhiqiang Sun
Gold nanorods (AuNRs)-doped phase change materials (PCMs) hold great promise for alleviating the instability and imbalance of solar energy due to their exceptional energy storage density and adaptability. However, their poor full-spectrum light absorption and inferior stability lead to insufficient photothermal conversion efficiency. Herein, we devise functional PCMs with synergistic reinforcement of light absorption and photothermal conversion through the in-situ growth of AuNRs on the MXene surface. The results indicate that the bimodal resonance effect of AuNRs and broad-spectrum absorption of MXene synergistically endow a 29.7 % increase in light absorption efficiencies over the pristine composites, which is superior to the sum of the two individually doped phase change composites (PCCs). Similarly, the photothermal storage and conversion efficiencies of the AuNRs/MXene-doped PCC are significantly enhanced by 36.6 % and 78.4 %, respectively. Furthermore, the fluorescence analysis reveals a prolonged fluorescence lifetime of 1.91 ns and a low quantum yield of 0.27 %, demonstrating efficient separation and migration of light-induced carriers and thermal dissipation via non-radiative relaxation, which is because the AuNRs and MXene synergistically enhance the localized surface plasmon resonance effect and the spectral absorption bands. This work offers fresh perspectives on the development of advanced photothermal PCMs for efficient solar thermal applications.
研究领域:
材料科学
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能源工程
·
纳米技术
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Ying Tang,Dongsheng Xie,Xiaomin Guo,Lining Fang,Hui Zeng,Zebao Rui
Plasmonic photochemical N 2 fixation has received widespread attention owing to the attractive plasmonic enhancement effects in improving solar-to-NH 3 conversion efficiency. However, the weak N 2 adsorption affinity in metallic plasmonic photocatalysts and insurmountable interfacial barriers in metal–semiconductor plasmonic photocatalysts lead to rapid charge carrier recombination instead of participating in N 2 -to-NH 3 conversion. Herein, a photothermal catalyst Fe-dispersed MoO 3− x /MXene with synergistic plasmon resonance hybridization structure is fabricated for photothermal N 2 fixation. The hybrid plasmon resonance effects derived from MXene and MoO 3− x induce a strong optical response across the ultraviolet–visible-near-infrared range and generation of energetic charge carriers, and the induced photothermal effect further accelerates electron extraction, transport, and surface reaction kinetics. Moreover, the abundant oxygen vacancies and Fe sites can intensify the N 2 adsorption and donate the energetic electrons into the anti-bonding system for the stimulative N H coupling process. A high NH 3 formation rate of 87.1 μmol g −1 h −1 is achieved under solar-level illumination.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55511
·
IF 2.7
Shuxin Zheng,Yuxiang Nie,Zhangzhong Wang,Xin Feng,Jiahua Zhu,Xiaohua Lu,Liwen Mu
This work presents a design of a unique “roller wheel” structure combining rigid MXene and flexible liquid metal (LM), aiming to construct an epoxy composite coating with simultaneous advanced mechanical strength and lubrication properties. The antiwear property of the epoxy composites is improved by 72.8% when the LM is 0.5 wt% and MXene is 0.03 wt%. The incorporation of LM-MXene improved the mechanical properties of the epoxy composite coating, resulting in an approximately 136.6% increase in elastic modulus. The unique “roller wheel” structure provides additional mechanical support and leads to lower adhesion between the MXene layers and LM. As a result, LM reduces the stripping and sliding of the interface between MXene layers during the friction process, further enhancing the lubrication performance of the epoxy composite coating.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 89
·56204-56210
·
IF 3.108
Runlin Han,Xufeng Ma,Yongli Xie,Da Teng,Shouhai Zhang
MXene, a new 2D transition metal carbide-based material, possesses excellent electrical conductivity and hydrophilicity. In this study, Ti3C2Tx (where T represents a functional group (O, OH, and/or F)) was produced by etching and ultrasonicating Ti3AlC2. Then, it was used to prepare the MXene composite membrane via a simple filtration method performed at 0.2 MPa on a polyethersulfone (PES) ultrafiltration membrane. The MXene composite membrane shows excellent flux (115 L m−2 h−1) and favorable rejection to Congo red dye (92.3% at 0.1 MPa). The membrane demonstrated rejection to inorganic salts below 23% with flux above 432 L m−2 h−1 at 0.1 MPa. Due to its loose lamellar structure, the composite membrane is able to demonstrate efficient permselectivity in the separation of dyes from salts. Furthermore, the composite membrane shows excellent hydrophilicity and flux because of the lamellar hydrophilic MXene.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）