CARBON
·
2021
·
IF 9.594
Biao Ji,Shangwu Fan,Sijie Kou,Xiaoyu Xia,Juanli Deng,Laifei Cheng,Litong Zhang
Ti 3 C 2 T X MXene has been proven to be a material of high application potential in the field of electromagnetic (EM) protection. Considering the density, MXene/polymer films (MPFs) are fabricated by employing the simple tape casting process and exhibit excellent electromagnetic shielding performance with respect to the MXene content. However, the absorption properties of as-fabricated MPFs are not satisfactory due to the impedance mismatch. Herein, a multilayer impedance gradient absorber with MPFs arranged in order has been successfully designed and prepared. The developed absorber possesses excellent EM wave absorption properties owing to the well-matched impedance and adjustment of permittivity. Moreover, the effect of the thickness of MPFs on the EM wave absorbing properties has been investigated by theoretical calculations and experimental measurements. The HFSS calculation reveals that the effective absorption bandwidth is capable to cover the whole X-band (8.2–12.4 GHz) with only a micro-adjustment of the thickness, with the minimum reflection coefficient (RC min) reaching up to −26.10 dB. In addition, the synergistic effect of the multiple loss mechanisms has been discussed in detail. This study not only proposes the effective design of a novel multilayer impedance gradient absorber, but also provides new fundamental basis for combining the simulation technology and material design.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Fan Zhao,Siqi Gong,Huiting Xu,Meng Li,Lina Li,Junjie Qi,Honghai Wang,Zhiying Wang,Yuqi Hu,Xiaobin Fan,Chunli Li,Jiapeng Liu
Rechargeable aqueous zinc-ion batteries are emerged as fascinating “beyond Li-ion” battery technologies for large-scale energy storage due to low cost, high theoretical capacity, high safety and environmental friendliness . However, developing cathode materials with outstanding electrochemical performance are prerequisites. Herein, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure is prepared by in situ incorporating amorphous V 2 O 5 with Ti 3 C 2 T x MXene to enhance the rechargeable aqueous Zn-ion batteries performance. Benefitting from the distinctive amorphous structure of a-V 2 O 5 , outstanding conductivity of Ti 3 C 2 T x MXene and the strong synergistic effect between two components, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure presents isotropic ion diffusion paths , plentiful ion storage sites and splendid conductivity. As a consequence, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure displays excellent specific capacity of 544 mAh g −1 at 0.5 A g −1 and outstanding rate performance. Particularly, even at a fairly high current density of 30 A g −1 , the a-V 2 O 5 @Ti 3 C 2 T x heterostructure shows an impressive specific capacity of 135 mAh g −1 along with about 100% coulombic efficiency after 1000 cycles. Furthermore, the mechanism related is expounded via comprehensive characterizations. Therefore, this work offers a way for developing high-performance vanadium-based cathode materials for aqueous zinc-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xianwei Geng,Chenguang Liu,Yi Sun,Yingchao Zhao,Ruowei Yi,Pengfei Song,Chun Zhao,Ivona Mitrovic,Li Yang,Cezhou Zhao
Lithium-sulfur (Li-S) batteries hold their promise in renewable next-generation energy storage technologies due to low cost and high theoretical energy. Herein, a Ti 3 C 2 T x MXene-carbon nanocage-sulfur (MXene/CNC/S) cathode is synthesized by a simple process with high conductivity and outstanding performance in Li-S batteries. The cathode with an unusually high sulfur content of 80% demonstrates an eminent initial specific capacity of 1275.5 mAh·g −1 at 0.1 C and retains 823.8 mAh·g −1 after 100 cycles, showing a high retention rate of 64.6%. Besides, it exhibits a great conductive feature for rate performance, delivering 630.5 mAh·g −1 capacity when the current rises to 4 C. In this composition electrode, the excellent electrochemical performance indicates that MXene can effectively adsorb polysulfides to help batteries achieve long-term cyclic performance. On the other hand, the introduction of CNC strongly improves the specific surface area of the cathode and constructs a high conductive network to reduce the stacking of MXene, thus exhibiting better rate performance and increasing utilization of sulfur. Our work holds future technological significance as it could accelerate progress towards lithium-sulfur batteries with high sulfur content and less pricy conductive materials.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Jin Wang,Xiaoqing Wei,Xunyue Wang,Wenwu Song,Weiting Zhong,Minmin Wang,Jianfeng Ju,Yanfeng Tang
As we know, in plasmonic-enhanced heterogeneous catalysis, the reaction rates could be remarkably accelerated by generating hot carriers in the constituent nanostructured metals. To further improve the reaction rate, well-defined heterostructures based on plasmonic gold nanoparticles on MXene Ti3C2Tx nanosheets (Au NPs@Ti3C2Tx) were rationally designed and systematically investigated to improve the performance of the oxygen evolution reaction (OER). The results demonstrated that the catalysis performance of the Au NPs@Ti3C2Tx system could be easily tuned by simply varying the concentration and size of Au NPs, and Au NPs@Ti3C2Tx with an average Au NP diameter (∼10 nm) exhibited a 2.5-fold increase in the oxidation or reduction current compared with pure Ti3C2Tx. The enhanced OER performance can be attributed to the synergistic effect of the plasmonic hot hole injection and Schottky junction carrier trapping. Owing to easy fabrication of Au NPs@Ti3C2Tx, the tunable size and concentration of Au NPs loaded on MXene nanosheets, and the significantly enhanced OER, it is expected that this work can lay the foundation to the design of multidimensional MXene-based heterostructures for highly efficient OER performance.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today
·
2025
·
IF 22
Bin Chen,Nan Jian,Junping Hu,Dianlun Wu,Yue Jiang,Xiaofeng Zhang,Jiatao Xie,Li Guo,Tao Song,Jiaen Huang,Shaojuan Luo,Wei Wei,Dongfeng Diao,Lina Li,Yingguo Yang,Deliang Zhu,Lei Wang,Yang Huang,Feng Rao
Two-dimensional (2D) MXenes are renowned for the unique feature of strong metallic conductivity, whereas the lack of semiconductive nature has become a crucial bottleneck that impedes MXenes’ rapid development in electronic devices. The challenge mainly comes from the stringent requirements for specific 2D compositions, whose synthesis and/or exfoliation techniques are too difficult to succeed. Here we proposed a facile and universal approach for fabricating semiconductive MXenes. Our demonstration showed that through hydrothermal-assisted intercalation treatment of the prototypical MXene-Ti 3 C 2 T x , shallow and deep Ti-lattice vacancies can be generated in its 2D nanosheets, weakening the original strong metallicity and even facilitating the wide-bandgap semiconductivity. Reciprocating bias polarization on the semiconductive 2D-Ti 3 C 2 T x nanosheet can induce reversible electrochemical-like migration of the surface anionic ligands, which enables high-nonlinearity and ultralow-current electrical switching capabilities for potential volatile selector applications. Our idea opens a new avenue for tuning the physical and chemical properties of MXenes, promoting their wide applications, especially in the field of 2D electronics.
研究领域:
材料科学
·
纳米科技
·
凝聚态物理
·
电子器件
·
二维材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Zehang Zhou,Lingfei Wei,Ya Yi,Shiyi Feng,Zeying Zhan,Dong Tian,Canhui Lu
MXene nanosheets are considered advantageous for functional materials, but current delamination methods to prepare MXene nanosheets have many limitations including high cost, small production scale, low efficiency, and deteriorated structure integrity of obtained nanosheets. Here, we propose a simple, efficient, and scalable shear stress-induced delamination (SSID) strategy to boost the production of single-/few-layered Ti 3 C 2 T x MXene nanosheets. Molecular dynamics simulation indicates that the pan mill-type grinding discs create a strong hydrodynamic flow field, which exerts gigantic shear stress to substantially delaminate the multilayered MXene stacks into homogeneously dispersed MXene nanosheets. Furthermore, shear stress generated from vigorous water flow has limited fragmentation effect, ensuring large lateral size and good structure integrity to the obtained MXene nanosheets as evidenced by the morphological and structural characterizations. Compared to conventional delamination methods, this novel SSID strategy exhibits great advantages in terms of efficiency, scalability and the properties of resultant MXene nanosheets, which opens up great opportunity for the scalable production and commercialization of high-performance MXene-based materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 17
·3929-3940
·
IF 7
Lei Fang,Yingjie Chen,Wei Shan,Tiankun Hui,Mokni Ilham,Jie Wu,Chuanli Zhou,Liangmin Yu,Meng Qiu
The drug resistance of bacteria seriously reduces the recovery rate of general disease and endangers human health. Consequently, it is urgent to investigate a non-antibiotic antibacterial material. Recently, two-dimensional MXene has shown good antibacterial properties and received extensive attention due to the large number of active sites, extremely high thermal conversion efficiency, excellent cytocompatibility and ability to penetrate pellicula. However, the antibacterial activity of Ti3C2Tx is greatly affected by the morphology and concentration. Herein, an organic–inorganic hybrid of HKUST-1@Ti3C2Tx with high specific surface area and photothermal effect was designed and fabricated. By adjusting the content of Cu(CO2CH3)2·H2O and 1,3,5-benzenetricarboxylic acid, the photothermal properties of the material can be adjusted, and the release of Cu2+ can be easily reduced. The morphological characterization and fluorescent staining of bacteria which were co-incubated with HKUST-1@Ti3C2Tx confirmed that Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus) had adhered to the material. NIR irradiation has enabled induced hyperthermia and the release of Cu2+ ions, causing the disruption of the bacterial membrane, resulting in cytoplasmic leakage. Furthermore, HKUST-1@Ti3C2Tx with synergistic antibacterial effect not only exhibits an excellent bactericidal rate (over 99%) but also greatly improves cytocompatibility with the reduction of the Cu2+ ion release. Therefore, organic–inorganic composites have potential for synergistic effects and non-antibiotic antibacterial activity.
研究领域:
材料科学
·
微生物学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Kexuan Hu,Hehe Wang,Wei Cheng,Yujian Rao,Limei Pan,Chuanfang John Zhang,Yang Wang,Quan Li,Jian Yang
In this study, a lightweight and robust Ti 3 C 2 T x /carbon nanotubes (CNTs) foam (TCF) was fabricated using HCl-induced self-assembly, followed by vacuum freeze-drying. The electrical conductivity and mechanical elasticity of the TCF was higher than those of monolithic Ti 3 C 2 T x foams. This was ascribed to the incorporation of CNTs into Ti 3 C 2 T x preventing the stacking of the Ti 3 C 2 T x nanosheets and producing a well-developed three-dimensional honeycomb-like porous network structure, which considerably improved impedance matching, promoted multiple reflection loss, increased conduction loss and polarisation loss, thus imparting remarkable microwave absorption properties to the TCF. The 1.72 and 1.92 mm thick TCF samples with absorber loadings of 4 wt%, which were obtained by immersing TCF into molten paraffin, followed by cutting it into coaxial rings, presented an optimum reflection loss of −48.8 dB and a maximum effective absorption bandwidth (EAB) of 5.44 GHz, respectively. Moreover, upon increasing the thickness of the TCF samples from 1.52 to 4.92 mm, the EAB could be regulated from 4.16 to 18 GHz, respectively. In this study, we developed a facile method for fabricating a lightweight and robust TCF, which met the ‘light, thin, broad, and strong’ criteria and presented a broad EAB and remarkable dissipation capability, for microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yiyuan Shi,Sisi Li,Zhimiao Tian,Xiansen Yang,Yubing Dong,Yaofeng Zhu,Yaqin Fu
The construction of three-dimensional (3D) hierarchically porous nanostructures is an effective microstructural design strategy for the fabrication of lightweight electromagnetic wave (EMW) absorption materials . In this work, 3D hierarchically porous Ti 3 C 2 T x MXene@polyaniline (PANI) hybrids are prepared via a self-assembly process. The as-prepared hybrids possess excellent microwave absorption performance with the minimum reflection loss ( RL min ) of the optimal Ti 3 C 2 T x MXene@PANI hybrid reaching − 53.79 dB at 12.67 GHz with a thickness of 1.33 mm and a loading amount of 10 wt% in paraffin. The light weight and high-efficiency microwave absorption properties of the hybrids result from their 3D hierarchically porous structure and well-matched impedance characteristics, which provide multiple reflection channels and loss mechanisms for incident EMWs. This strategy offers a rational, simple and practical design approach for high-performance MXene-based EMW absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1785-1793
·
IF 2.4
Yü Jingzhao,Zhang Yuqing,Wang Liying,Yang Xijia,Yang Yue,Jiang Ke,Lü Wei,Sun Xiaojuan
AlGaN is an ideal material for fabricating ultraviolet (UV) photodetectors targeting the solar-blind wavelength range. However, the performance of UV detectors based on AlGaN is still limited by its material quality and effective p-type doping. Herein, we propose an external modulation method by combining AlGaN with two-dimensional MXene (Ti 3 C 2 T x ) to construct Ti 3 C 2 T x /AlGaN heterostructures. It has been shown that Ti 3 C 2 T x undergoes a transition from a metallic material to a semiconductor depending on oxidation, and the performance of Ti 3 C 2 T x /AlGaN detectors could be adjusted accordingly. The effect of oxidation process of Ti 3 C 2 Tx on performance of Ti 3 C 2 T x /AlGaN photodetectors has been investigated systematically. The optimized devices exhibited a rise time of 72 ms and a decay time 30 ms, achieving a responsivity of 3000 mA/W under 270 nm UV light irradiation.
研究领域:
光电子学
·
半导体器件
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2020
·
IF 4
Guangzhen Cui,Linbo Wang,Ling Li,Wei Xie,Guangxin Gu
MXene, a novel two-dimensional (2D) multi-layer material, has drawn unusual interest as the microwave absorbers for electromagnetic energy attenuation. Synthetic MXene-based heterostructure composites via optimizing structure is an effective strategy to endow MXene materials with high-performance microwave absorption. This study reports the fabrication and investigation of the microwave absorption performance of a sandwich-like CuS/Ti 3 C 2 T x MXene composites prepared by loading CuS nanoparticles onto 2D Ti 3 C 2 T x via a solvothermal method. The morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti 3 C 2 T x composite with a heterolayered architecture displayed superior microwave absorption ability. With a 35 wt% filler loading in the paraffin matrix, the minimum reflection loss value reached −45.3 dB at a frequency of 7.3 GHz and the effective absorption bandwidth achieved a value as high as 5.2 GHz with a thickness of 2.0 mm. The enhanced microwave absorption performances can be ascribed to the cooperation of the conductive network, interface polarization, dipole polarization, multiple reflection and scattering. Therefore, the synthesized CuS/Ti 3 C 2 T x MXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 2
·1-14
·
IF 2.6
Yan Xiaofei,Shao Yehua,Gao Zhaoyang,Wu Bei,Wang Chen,Zhu Chenyan,Tu Lexi
Poly(lactic acid) (PLA), a new renewable and environmentally friendly polymer material, has gained significant attention in recent years. However, its application is limited by challenges such as poor thermal stability, brittleness and limited impact resistance. At present, PLA is predominantly modified through blending, filling and copolymerization methods. Although the above modification methods can effectively improve the properties of PLA, there are still some deficiencies in some places. In this work, CNF/Ti 3 C 2 T x /PLA composites were prepared by impregnation with poly(lactic acid) (PLA) and cellulose nanofibers (CNF), a new two-dimensional material Ti 3 C 2 T x , and a complete CNF membrane as a support framework. The effects of CNF and Ti 3 C 2 T x incorporation on the thermal, mechanical and electromagnetic shielding properties of PLA were investigated using various characterization techniques including FT-IR, XRD, DSC, TGA, tensile testing and electromagnetic test characterization. The results showed that CNF can improve the thermal stability and crystallinity of PLA, where the crystallinity can reach 23.5%. CNF synergized with Ti 3 C 2 T x to improve the mechanical properties of PLA, and the tensile strength was increased by 64.29%. Furthermore, Ti 3 C 2 T x imparted electromagnetic shielding properties to PLA composites. The findings expand the application of PLA composites in the field of electromagnetic shielding.
研究领域:
材料科学
·
复合材料
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）