CERAMICS INTERNATIONAL
·
2026
·
IF 6
Baoji Miao,Liu Qiang,He Huaizhi,Irshad Ahmad Mir,Jinbo Bai,Fengyun Wang,Muhammad Yasir
High-entropy (HE) engineering presents a promising approach to optimizing the electromagnetic (EM) properties of MXenes for enhanced microwave absorption. In this study, a series of tunable configurational entropy MXenes Ti 2 CT x (MC-1), (Ti 1 / 2 V 1 / 2 ) 2 CT x (MC-2), (Ti 1 / 3 V 1 / 3 Nb 1 / 3 ) 2 CT x (MC-3), (Ti 1 / 4 V 1 / 4 Nb 1 / 4 Ta 1 / 4 ) 2 CT x (MC-4), and (Ti 1 / 5 V 1 / 5 Nb 1 / 5 Hf 1 / 5 Ta 1 / 5 ) 2 CT x (MC-5) are synthesized via selective etching and intercalation of their corresponding MAX phases. The structural and morphological characterization confirms the successful formation of accordion-like high-entropy MXenes. The electromagnetic evaluations demonstrate a significant enhancement in absorption performance corresponding to the increase in M-site entropy. The MXenes MC-4 and MC-5 also exhibit remarkably high performance, achieving minimum reflection losses (RL min ) of −48.5 dB at 8.56 GHz (2.85 mm) and −50.7 dB at 17.04 GHz (4.58 mm), along with effective absorption bandwidths (EAB) of 3.68 GHz and 1.92 GHz, respectively, surpassing their lower-entropy counterparts. Their superior stealth capabilities are further validated through radar cross section (RCS) simulations, which reveal that MC-4 and MC-5 coatings maintained RCS values below −20 dBm 2 across a broad angular spectrum (−60 to 60°), significantly outperforming a perfect electric conductor (PEC) baseline. This performance enhancement is essentially attributed to the entropy-mediated optimization of electromagnetic parameters, which improves impedance matching alongside intensified polarization loss resulting from lattice defects and interfaces. This study confirms that high-entropy design is an effective strategy for advancing high-performance wideband MXene absorbers, holding significant potential for applications in stealth and communication technologies.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Kunxian Chen,Qian Zhou,Yujie Fu,Hao Wang,Xiaolian Wang
Pristine Nb 2 C/Ti 3 C 2 dual MXenes enable composition-controlled MgH 2 catalysis. • A 1:2 Nb 2 C/Ti 3 C 2 ratio is optimal at only 5 wt% total catalyst loading. • 6.81 wt% H 2 is released within 3 min at 300 °C. • 4.56 wt% H 2 is absorbed within 20 s at 50 °C under 55 bar H 2 . • 91%/90% capacity is retained after 30 hydrogenation/dehydrogenation cycles. MXene catalysts can improve MgH 2 kinetics, but composition effects in dual pristine MXenes at fixed loading remain unclear. Here, Nb 2 C/Ti 3 C 2 was optimized by Nb 2 C etching time, single-MXene loading, mass ratio, and total loading. Nb 2 C etched for 70 h showed low residual Al, intact layers, and the highest surface area. At 5 wt% total catalyst, Nb 2 C:Ti 3 C 2 = 1:2 gave the best overall performance. It released 6.81 wt% H 2 in 3 min at 300 °C and 6.02 wt% in 10 min at 250 °C, and absorbed 4.56 wt% H 2 in 20 s at 50 °C under 55 bar H 2 . The apparent dehydrogenation activation energy was 71.25 ± 8.73 kJ·mol −1 , 53.7% below the MgH 2 reference. After 30 cycles, hydrogenation/dehydrogenation capacity retentions were 91%/90%. XRD and SEM confirmed reversible MgH 2 /Mg conversion and cycling-related morphology changes. XPS survey of the optimized dual-MXene composite confirmed the coexistence of Ti- and Nb-containing species, while reaction-state XPS of the individual Ti 3 C 2 - and Nb 2 C-containing composites showed reaction-dependent surface reconstruction. Together, these results support composition-dependent catalytic contributions, whereas simultaneous Ti-Nb reconstruction in the optimal dual system remains unverified.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mengxiang Liu,Miao Li,Zhiwei Qiao,Boshi Gao,Jiale Fan,Dongdong Liu,Yu Zhang,Kaibo Yu,Tao Zhang,Xiaoxiao Huang
Electronic-structure framework couples dielectric polarization with conductive loss. • Electronegativity-dependent p-block doping provides a transferable design criterion. • Framework-guided p-block–doped Ti 3 C 2 T x achieves broadband absorption up to 5.24 GHz. Dielectric polarization optimization and conductive loss modulation are widely employed strategies for achieving lightweight and broadband electromagnetic (EM) absorption. However, a unified mechanistic understanding that explicitly correlates polarization and conductive loss with the underlying electronic structure remains lacking, rendering their synergistic regulation largely empirical. Herein, a combined theoretical–experimental framework is established to elucidate an electronic-structure–driven attenuation mechanism, using p-block nonmetal–doped MXenes as a model system. First-principles calculations reveal that selective bonding between p-block elements and Ti 3 C 2 T x induces charge redistribution, strengthens Ti–X interactions, and generates localized polarization centers, thereby activating coupled dipolar, interfacial, and defect-related polarization while simultaneously tuning conductive loss. Guided by this mechanism, Ti 3 C 2 T x MXenes doped with representative p-block elements (B, N, P, and S) are synthesized, achieving minimum reflection losses of −60.5 dB (B), −52.9 dB (N), −53.8 dB (P), and −54.8 dB (S). For same-period dopants, increasing electronegativity broadens the effective absorption bandwidth without altering the underlying dissipation mechanism, with N- and S-doped Ti 3 C 2 T x achieving bandwidths of up to 5.24 and 4.56 GHz. The strong agreement between theory and experiment establishes a universal electronic-structure–modulation pathway for regulating polarization and conductive loss in MXenes, providing theoretical guidance for designing lightweight, high-performance EM absorbers. Download: Download high-res image (257KB) Download: Download full-size image
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高影响因子
ACS Nano
·
2025
·
IF 16
Shilong Li,Kecheng Guan,Dandan Zhou,Dong Zou,Jian Lu,Wenbo Jiang,Bin Chen,Jian Qiu,Lele Cui,Tianxiang Yu,Yuqing Sun,Zhi Xu,Wanqin Jin,Wenheng Jing
Two-dimensional (2D) material membranes have significant potential for selectively transporting molecules and ions, crucial for environmental and energy applications significantly. However, challenges such as complex pathways and instability due to weak interactions hinder their performance. This study takes 2D MXene (Ti3C2Tx) as a platform and proposes a lattice vacancy-anchored chemical etching method to perforate MXene nanosheets and produce acid cross-linkers simultaneously. The etching process involves H2O2 oxidation consuming Ti atoms from the lattice vacancies of MXene to create peroxo titanic acid (PTA), precisely generating nanopores in the nanosheets for additional transport pathways. At the same time, the produced PTA acts as a cross-linking agent that enhances the interaction between MXene nanosheets to form stabilized interlayer channels. This approach results in multilevel features in the MXene membrane, offering abundant vertical water channels and robust interlayer ion-sieving channels. Consequently, both permeability and selectivity improve nearly 10-fold compared to the pristine membrane, overcoming previous trade-offs. This strategy presents a precise and ingenious method for perforating 2D materials and constructing high-performance mass transport channels of 2D membranes at various levels, benefiting sustainable and highly efficient desalination processes.
研究领域:
材料科学
·
环境工程
·
化学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yiqian Kong,Yinghua Zhu,Juncheng Song,Qi Liu,Lili Song,Xiaowei Fei,Xiangyang Li
In this work, Ti 3 C 2 nano-enzymes (Ti 3 C 2 NEs) materials with simulated peroxidase activity and fluorescence quenching properties were prepared. Then Ti 3 C 2 NEs was functionalized using 6-carboxyfluorescein (FAM) labeled Aflatoxin B 1 (AFB 1 ) aptamers to construct a novel multimode nano enzyme biosensor for the detection of AFB 1 in peanuts. Based on the fluorescence quenching characteristics and the superior simulated peroxidase activity of Ti 3 C 2 NE S and the specific binding of the aptamer to AFB 1 , the sensitive and rapid fluorescence/colorimetric/smart phone detection of AFB 1 have been achieved, with detection limits of 0.09 ng mL −1 , 0.61 ng mL −1 and 0.96 ng mL −1 , respectively. The analytical method provided can not only detect AFB 1 in multiple modes, but also has a wider detection range, lower limit of detection (LOD) and better recovery rate, and can achieve on-site accurate detection of AFB 1 content in peanuts, which has great application potential in the field of food quality testing.
研究领域:
食品安全检测
·
生物传感技术
·
纳米材料科学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Fengyuan Zhang,Weiqu Liu,Shuo Wang,Chunhua Liu,Hongyi Shi,Liyan Liang,Ke Pi
MXenes (Ti 3 C 2 T x ), a novel two-dimensional (2D) material, exhibits higher application potential in many fields due to the layered-structure and other unique characteristics. Here, the few-layer Ti 3 C 2 T x is successfully fabricated via etching and ultrasonic. The [3-(2-Aminoethyl) aminopropyl] trimethoxy silane (silane coupling agent, AEAPTES) is used to modify the as-prepared Ti 3 C 2 T x for adjusting wettability . Then, the functional Ti 3 C 2 T x (Ti 3 C 2 @Si) with different amount is introduced into waterborne polyurethane (WPU) for enhancing corrosion resistance performance. The corrosion resistance performance is evaluated by Tafel curve and electrochemical impedance spectroscopy . The results of wettability reveal that the hydrophobicity of Ti 3 C 2 @Si is significantly improved with the water contact up to 136–142°. The results of anti-corrosion measurement demonstrate that the WPU endowed with Ti 3 C 2 @Si presents the excellent corrosion resistance performance. The 0.1%Ti 3 C 2 @Si/WPU exhibits the lowest corrosion current density (2.67 × 10 −9 A/cm 2 ) and the largest corrosion resistance (3.05 × 10 6 Ω). Moreover, after 42 days’ immersion, the lowest frequency impedance of 0.1%Ti 3 C 2 @Si/WPU composite coating was 3.68 × 10 6 Ω cm 2 . This work is of great importance for potential applications of Ti 3 C 2 T x in the anti-corrosion field.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
腐蚀科学
·
纳米复合材料
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hui Ouyang,Jiaxin Xian,Shuai Luo,Lvxia Zhang,Wenwen Wang,Zhifeng Fu
A facile, one-step doping protocol was adopted to synthesize Co single atomic site catalysts (SASCs) in UiO-66 metal–organic frameworks. In view of highly uniform active sites of Co–O6 moieties, the SASCs specifically contribute to catalyzing the generation of a large amount of singlet oxygen instead of superoxide or hydroxyl radicals, which endows Co SASCs with a the remarkable enhancement effect (∼3775 times) on luminol chemiluminescent (CL) emission. Interestingly, monolayer titanium carbide MXenes can drastically quench the CL signal of the Co SASC-boosted luminol reaction by ∼94.6% as highly efficient luminescent absorbents. Furthermore, the emitter–quencher pair of Co SASCs and titanium carbide MXenes was successfully adopted to develop an immunoassay method for cardiac troponin I (cTnI) on an immunochromatographic test strip platform. With a sandwich immunoreaction mode, a titanium carbide MXene-labeled cTnI tracer antibody was captured on the test line of a test strip, which significantly inhibited the CL response of the Co SACs-boosted luminol system. The dynamic range for quantitating cTnI is 1.0–100 pg mL–1, with a detection limit of 0.33 pg mL–1 (3σ). The test strip was successfully used to detect cTnI in human serum samples collected from cardiopathy patients. This proof-of-principle work manifests both the CL enhancement of SASCs and the quenching behavior of MXenes, which shows the thrilling prospects of combinational usage of the two functionalized nanomaterials for tracking biological recognition events.
研究领域:
分析化学
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材料科学
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生物医学工程
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纳米技术
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 46
·18688-18697
·
IF 3.5
Xiaolong Lu,Yan Zhou,Cancan Li,Qi Wang,Bijun Fang,Yi Shi,Ningyi Yuan,Jianning Ding
Two-dimensional (2D) transition-metal carbide Ti3C2TX (MXene) possesses good electrical conductivity, high specific surface areas and metal oxide-like surfaces, which make it ideal for application in supercapacitors with both high energy density and power density. However, similar to other 2D materials, the issue of self-stacking leads to narrower ion-transport channels, along with a drastic reduction in active sites, thus severely limiting the performance of MXene-based electrodes. To address this problem, this work proposes to introduce one-dimensional (1D) reduced graphene oxide (rGO) nanoribbons as spacers between MXene nanosheets to construct a composite structure for inhibiting self-stacking. As expected, owing to the steric effect and high aspect ratio of rGO nanoribbons, the fabricated MXene/rGO hybrid electrode, with the addition of 5 wt% graphene oxide (GO), exhibits a greatly improved specific capacitance (397.4 F g−1 at 5 mV s−1) and an unparalleled rate capability (with a capacitance retention of 52.9% at 2000 mV s−1). This work sheds significant light on the development of MXene-based materials for advanced energy storage devices.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Zhanbin Feng,Guofei Feng,Xinchen Yue,Xing-Hong Zhang
Dielectric elastomers (DEs) with high actuated strains at low electric fields have been a great challenge over the past few decades. In this work, we report the preparation of poly(thioether) grafted Ti 3 C 2 T x MXene DE nanocomposites (MXeneK-FGE-BMI) with high area strain at low driving voltage (17.1 %@11.9 V/μm) by two steps: the pretreated MXene (MXeneK) initiated decarboxylative ring-opening polymerization (ROP) of furfuryl glycidyl ether (FGE) and carbonyl sulfide (COS), followed by the Diels-Alder (DA) crossslinking reaction between furan groups and bismaleimide (BMI). The grafting of poly(thioether) chains onto the MXeneK surfaces enables MXeneK well dispersed in the matrix, leading to the significant decrease of dielectric loss (tan δ, below 0.04@10 3 Hz). Low content of MXeneK (below 1.0 wt%) resulted in high ε’ (∼12.3@10 3 Hz) and low elastic modulus (Y, below 0.5 MPa). Therefore, the resultant DE nanocomposite present a high area strain of 17.1 % at a driving voltage of 11.9 V/μm, superior to the previous reports (0.7 %∼10 %@12 V/μm). This work provides a facile strategy to prepare DE nanocomposites with excellent electromechanical performances at low driving voltage.
研究领域:
材料科学
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高分子化学
·
纳米技术
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DOI
高影响因子
Journal of the American Chemical Society
·
2019
·
IF 14.695
Mian Li,Jun Lu,Kan Luo,Youbing Li,Keke Chang,Ke Chen,Jie Zhou,Johanna Rosen,Lars Hultman,Per Eklund,Per O. Å. Persson,Shiyu Du,Zhifang Chai,Zhengren Huang,Qing Huang
Nanolaminated materials are important because of their exceptional properties and wide range of applications. Here, we demonstrate a general approach to synthesizing a series of Zn-based MAX phases and Cl-terminated MXenes originating from the replacement reaction between the MAX phase and the late transition-metal halides. The approach is a top-down route that enables the late transitional element atom (Zn in the present case) to occupy the A site in the pre-existing MAX phase structure. Using this replacement reaction between the Zn element from molten ZnCl2 and the Al element in MAX phase precursors (Ti3AlC2, Ti2AlC, Ti2AlN, and V2AlC), novel MAX phases Ti3ZnC2, Ti2ZnC, Ti2ZnN, and V2ZnC were synthesized. When employing excess ZnCl2, Cl-terminated MXenes (such as Ti3C2Cl2 and Ti2CCl2) were derived by a subsequent exfoliation of Ti3ZnC2 and Ti2ZnC due to the strong Lewis acidity of molten ZnCl2. These results indicate that A-site element replacement in traditional MAX phases by late transition-metal halides opens the door to explore MAX phases that are not thermodynamically stable at high temperature and would be difficult to synthesize through the commonly employed powder metallurgy approach. In addition, this is the first time that exclusively Cl-terminated MXenes were obtained, and the etching effect of Lewis acid in molten salts provides a green and viable route to preparing MXenes through an HF-free chemical approach.
研究领域:
材料科学
·
无机化学
·
纳米技术
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 41
·1803938
·
IF 13.325
Xinliang Li,Xiaowei Yin,Changqing Song,Meikang Han,Hailong Xu,Wenyan Duan,Laifei Cheng,Litong Zhang
Electromagnetic wave (EM) absorption materials with broader effective absorption bandwidth (EAB), lightweight, and thinness characteristics are highly desirable in areas of wearable device and portable electronics. However, there are still many obstacles to simultaneously satisfy the above critical requirements required by new high-performance EM absorption materials. Herein, for the first time, Ti 3 C 2 T X MXenes are selected as the dielectric mediator to prepare reduced graphene oxide (RGO)/Ti 3 C 2 T X hybrids foam with hollow core–shell architectures and controllable complex permittivity via self-assembly and sacrificial template processes, under the guidance of theoretical calculations. RGO is grafted flatly on the outer surface of the Ti 3 C 2 T X spheres-core, forming a unique heterostructure. The RGO/Ti 3 C 2 T X foam possesses excellent EM absorption performance superior to all reported foam-based counterparts, the EAB covers the whole X-band at 3.2 mm while the density is merely 0.0033 g cm −3 , and its specific EM absorption performance ( SMAP = RL (dB)/ Thickness (cm)/ Density (g cm −3 )) value exceeds 14 299.2 dB cm −2 g −1 , verifying the above theoretical results. This study is expected to guide future exploration on designing high-performance EM absorption materials, and the RGO/Ti 3 C 2 T X foam can be promising candidates in energy storage, sensors, and wearable electronics fields.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
能量存储
·
可穿戴电子器件
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wanyun Li,Bangchuan Zhao,Jin Bai,Hongyang Ma,Peiyao Wang,Yunjie Mao,Shuai Lin,Xiaoguang Zhu,Xuebin Zhu,Yuping Sun
Lithium rich manganese based materials (LMR) have promised the likeliest candidate for next generation lithium-ion battery cathodes owing to its high energy density and low materials cost. However, severe capacity decline and voltage decay hinder their practical application, which is closely concerned with the structure degradation and irreversible oxygen release. Herein, a simple strategy to reinforce the structural stability of LMR materials by constructing heterostructure with Nb-based MXenes (Nb 2 CT x / Nb 4 C 3 T x ) is proposed. A small amount of spinel phase and pseudo-bonding between Nb and O ions as well as extra oxygen vacancies can be induced by the MXenes addition in LMR, effectively inactivating the surface oxygen and suppressing the structure distortion. In addition, MXene can also alleviate the volume change during cycling process and provide additional transport channels for electrons. The ably designed 3 wt% LMR/Nb 2 CT x cathode presented high initial Coulombic efficiency of 85.6% at 0.1C (vs. 77.4% for the pristine material) and excellent cycling performance with a capacity retention of 83.8% after 200 cycles at 0.5C (vs. 66.6% for the pristine material). This work sheds some light on stabilizing the structure of lithium-rich manganese materials and provides a new idea for the design of other high performance cathode materials.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
·
纳米材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）