CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jingyu Song,Yongqian Shen,Guibin Zhang,Mingxuan Sun,Mengyao Han,Xueyan Du
While two-dimensional lamellar materials, specifically Ti 3 C 2 T x MXenes, have shown great promise as wave-absorbing materials, the precise design of interlayer spacing poses a persistent challenge. In this study, Ti 3 C 2 T x MXene layers with adjustable interlayer spacings were crafted using a straightforward molecular welding technique. Through the incorporation of Ni nanoparticles onto the Ti 3 C 2 T x MXene layers using a combination of simple mechanical stirring and carbonation reactions, we successfully developed Ti 3 C 2 T x MXene/Ni/C composites featuring a distinct lamellar structure. A uniform dispersion of Ni nanoparticles on the surface of the Ti 3 C 2 T x MXene nanosheets was found with some of the nanoparticles intercalated into the layers. The Ti 3 C 2 T x MXene/Ni/C composites exhibited a maximum reflection loss (RL) value of −42.3 dB at 12.3 GHz, accompanied by an impressive effective absorption bandwidth (EAB) of 5.6 GHz. This outstanding absorption performance could be attributed to various factors, including the dielectric loss of the Ti 3 C 2 T x MXene lamellae, reflections and scattering of multiphase heterostructures, the magnetic loss of the Ni nanoparticles, and their synergistic attenuation. Furthermore, Ni nanoparticles with high electrical conductivity induced vortex currents under the alternating influence of electromagnetic waves (EMWs), resulting in a substantial depletion. This study introduces an innovative approach for synthesizing Ti 3 C 2 T x MXene/Ni/C composites with tunable interlayer spacing, showing their potential for applications in microwave absorption (MA).
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DOI
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FlatChem
·
2024
·
IF 5.9
Siqi Gong,Jing Li,Fan Zhao,Mengdie Yan,Chenghao Huang,Guanzhong Huo,Chunli Li,Bing Wu,Jiapeng Liu
The emerging energy-saving and environmentally friendly capacitive deionization (CDI) technology has attracted more and more attention. However, it remains a great challenge to develop CDI electrode materials with excellent comprehensive properties. Herein, the porous N, P co-doping Ti 3 C 2 T x MXene (N, P-Ti 3 C 2 T x ) was prepared successfully by combining simple flocculation with an annealing process. Benefitting from the synergistic effect of the combination of porous structure and co-doping of N and P heteroatoms, the N, P-Ti 3 C 2 T x exhibits substantial specific surface area, which provides more surface bounding active sites for electrochemical reactions, thus assisting to boost the CDI performance. As a result, the N, P-Ti 3 C 2 T x exhibited an admirable salt (Na + ) adsorption capacity of 53.3 mg g −1 and exceptional recycling property. Impressively, the N, P-Ti 3 C 2 T x also exhibited superior desalination performance of Pb 2+ , characterized by an exceptionally high desalination capacity of up to 168.2 mg g −1 at 1.2 V, and the corresponding desalination rate reached 0.047 mg g −1 s −1 . Additionally, the deionization mechanism involved was elucidated through a series of characterizations. This work will furnish an effective avenue for the innovative design of MXene-based electrode materials toward high-performance CDI.
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DOI
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Luyang Liang,Ruishu Yang,Gaojie Han,Yuezhan Feng,Biao Zhao,Rui Zhang,Yaming Wang,Chuntai Liu
Two-dimensional Ti3C2Tx MXene-based hybrids-anchored magnetic metal nanoparticles show a huge potential application as effective wave absorbers due to the synergistic electromagnetic (EM) loss effect. In this work, uniform and size-controllable nickel, cobalt, or nickel–cobalt alloy nanoparticles were in situ grown on the surface of MXene via a facile and moderate co-solvothermal method for the first time. As an example, a nickel nanoparticles-anchored MXene (Ni@MXene) hybrid was homodispersed into dielectric polyvinylidene fluoride to develop its EM wave-absorbing capacity to a great extent. As expected, the results showed strong reflection loss (RLmin = −52.6 dB at 8.4 GHz), broad effective absorption bandwidth (EAB = 3.7 GHz including 71% of X-band), low loading (10 wt % Ni@MXene), and thin thickness (3.0 mm). By adjusting the sample thickness, EAB can cover completely the whole X-band with a maximum of 6.1 GHz, showing a huge potential of Ni@MXene hybrid applying as aircraft stealth coating. The mechanism analyses revealed that the excellent impedance matching, magnetocoupling effect, conductance, magnetic loss, and multiple scatterings contribute to the splendid EM wave-absorbing performance of the Ni@MXene hybrid. Considering the excellent overall performance, the Ni@MXene hybrid was identified as a promising candidate for EM wave absorption.
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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.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 4
·694-698
·
IF 1.063
Li La,Chen Di,Shen Guozhen
Flexible on-chip microsupercapacitors(MSCs) are highly desired for integrated wearable or portable electronics due to their advantages of small size, high power density, easy integration, long lifespan, high security, and flexibility. The output voltage of MSCs can be improved by designing MSC arrays, which could further expand their application fields. In this work, we proposed a facile laser direct cutting method to prepare an on-chip flexible MSC array using Ti 3 C 2 T x MXene as both current collector and electrode materials. The designed MSC in PVA/H 2 SO 4 all-solid-state gel electrolyte exhibits a large volume/areal capacitance of 770.72 F/cm 3 (46.24 mF/cm 2 ) at a scan rate of 20 mV/s, a high energy density of 68.51 mW·h/cm 3 at a power density of 6.16 W/cm 3 , excellent cycling stability with capacitance retention of 98.50% after 10000 charge/discharge cycles. The MSC also shows superior flexibility and stability even after repetition of charge/discharge cycles under the convex and concave bending states. In addition, the assembled MSC array(4 in series) provides a high voltage of 3.2 V, which could easily power a purple light-emitting diode more than 10 min, demonstrating its potential application in integrated portable/wearable devices.
研究领域:
材料科学
·
能源存储
·
纳米技术
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CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 1
·2459-2466
·
IF 5.2
Xin Liu,Hanmei Zhang,Tao Shen,Jianbo Sun
SnO 2 nanoparticles@Ti 3 C 2 T x MXene have been successfully synthesized by a flexible solvothermal method. The Ti 3 C 2 T x MXene was evenly anchored by the SnO 2 nanoparticles (∼5 nm) through the controllable assembly heterojunction . Ti 3 C 2 T x MXene contributed to the improvement of material conductivity compared to SnO 2 nanoparticles. The combination of SnO 2 @Ti 3 C 2 T x exhibits excellent sensitivity and selectivity to NO 2 at room temperature (RT). Compared with pure Ti 3 C 2 T x MXene, the sensitivity of TCS1.5 nanocomposite increases more than 20 times to 300 ppm NO 2 at RT. In order to explore the sensing mechanism of SnO 2 @Ti 3 C 2 T x nanocomposite to NO 2 , nitrogen adsorption-desorption isotherm technology and DFT calculations were performed. They demonstrated that the high specific surface area, well-proportioned heterogeneous structure of SnO 2 @Ti 3 C 2 T x MXene, and the vital ionic bonds of Sn–N and O–N formed between substrate and NO 2 gas had beneficial effect on improving the gas response capability.
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IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Yuanyuan Zhou,Song Li,Qingyang Xiao
The reliable detection of ammonia (NH3) at room temperature (RT) remains a critical challenge for applications in industrial safety and agricultural Internet of Things (IoT), where sensors must combine high sensitivity with robust stability against environmental interference. To address this, we engineered a stable chemiresistive heterojunction by integrating zinc phthalocyanine (ZnPc) nanoparticles with highly conductive two-dimensional (2D) Ti3C2Tx MXene nanosheets. Comprehensive characterization, including scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), confirms the successful formation of an intimate interface, which facilitates effective charge transfer. The optimized sensor demonstrates a response of ~25% to 100 parts per million (ppm) NH3 at 25°C, a fivefold enhancement over pristine MXene, along with excellent selectivity against common volatile organic compounds (VOCs). Crucially, the device exhibits outstanding repeatability and maintains stable performance across a wide relative humidity (RH) range (20-80% RH), directly addressing key practical deployment hurdles. The enhanced performance is attributed to the synergistic combination of specific NH3 adsorption at ZnPc molecular sites and efficient charge modulation through the conductive MXene network. This work provides a viable and manufacturable strategy for fabricating selective, stable, and room-temperature-operating gas sensors ready for integration into real-world monitoring systems.
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Small
·
2026
·
IF 11.8
Jingxuan Cui,Aihu Feng,Kun Liu,Junge Chen,Le Mi,Yang Yu,Yun Yu
The rapid development of infrared detection technology has spurred extensive interest in advanced functional materials with exceptional infrared stealth capabilities. This work fabricates a novel thermal-insulation and radiation-modulation integrated infrared stealth material, integrating polyimide (PI) aerogel fibers (endowed with thermal insulation) and MXene/tannic acid (TA) composite (featuring low emissivity and oxidation resistance), to achieve thermal camouflage for high-temperature targets. In this composite system, the abundant pores within PI aerogel fibers not only suppress gas convective heat transfer but also extend the heat conduction path along the pore walls, thus achieving efficient thermal insulation. Meanwhile, MXene's metallic-like conductivity and layered structure enable it to efficiently reflect infrared thermal radiation, minimizing radiant heat loss to the surroundings. Consequently, the composite PI/SA/TM exhibits a low thermal conductivity of 0.084 W·m −1 ·K −1 and a low emissivity of 0.17. At an ambient temperature of 200 °C, its radiant temperature is merely 40.7 °C, outperforming pure PI, TM film and commercial fabrics in terms of stealth performance. The incorporation of TA further enhances oxidation stability for PI/SA/TM, retaining excellent emissivity (0.24) even after 15 days of humid heat aging. This work provides new technical support for designing advanced functional integrated infrared stealth materials.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiangtao Cui,Wenzhe Han,Zhuoran Hou,Xiangfeng Feng,Gaosen Wang,Huayu Zhang
The layered hydroxides are endowed with a large specific surface area that enables a massive utilization in super capacitors. However, they have low conductivity which confines the electrochemical response in the layered hydroxide (LDH). The proposed research involved a one-pot synthesis procedure based on hydrothermal approach in order to get a composite material made of Ti 3 C 2 T x -MXene, Cobalt-Vanadium-Aluminum layered double hydroxide (CoVA1-LDH), and coated nickel foam. The combination of Ti 3 C 2 T x -MXene and CoVAl-LDH composite material exhibited a good value of electrochemical activity (1938.45 F g −1 ), which is 1 A g −1 in a three-electrode system. With the use of 5000 charge discharge cycles, and a high rate of current density of 10 A g −1 , it retained 79.8% of the initial capacitance. Further, the fabricated Ti 3 C 2 T x -MXene/CoVAl-LDH//AC apparatus achieved maximum energy density of 51.57 Wh kg −1 at the power density of 800.0 W kg −1 . Following 10, 000 cycles of the cycling at 10 A g −1 , it demonstrated the good capacitance retention rate of 89.1% which indicates good cycling stability. Rational structural design may be considered an effective approach to enhance the properties of materials, and this article gives new insights into the structural design of MXene/LDH composites.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chenghong Zhang,Kang Qiu,Jusen Guo,Linchen Hu,Chao Sun,Yikang Qiang,Wei Ding,Wei Wang,Jialiang Luo,Guoxing Pan,Zhigao Sheng
Achieving precise orientation control of two-dimensional (2D) materials remains a significant challenge for tailoring their electromagnetic functionalities. Herein, we report, for the first time, the successful fabrication of in-plane oriented Ti 3 C 2 T x MXene/epoxy (EP) composites via a high-intensity horizontal-rotating magnetic field. By systematically varying the magnetic field intensity from 0 to 6 T, the orientation degree of Ti 3 C 2 T x nanosheets can be continuously and precisely tuned, reaching a remarkably high value of 0.74. This process establishes a direct and quantitative correlation between the magnetic field strength and the resulting structural alignment. The magnetically induced orientation leads to a dramatic enhancement in key electromagnetic parameters, including complex permittivity, electrical conductivity, attenuation constant, and impedance optimization, all of which exhibit quantifiable relationships with the applied field. Consequently, this controlled alignment translates into extraordinary functional performance. The optimally aligned composite demonstrates a remarkable 5-fold improvement in GHz microwave absorption and a significant 44.9% enhancement in THz shielding efficiency compared to its non-oriented counterpart. This work pioneers a magnetic-field strategy to manipulate 2D microstructure, establishing quantitative structure-property relationships and paving the way for next-generation electromagnetic absorption and shielding composites.
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Advanced Sustainable Systems
·
2021
·Vol. 5
·期 12
·2100263
·
IF 6.271
Xiao-Peng Li,Xiaofeng Li,Heguo Li,Yue Zhao,Wei Li,Shouke Yan,Zhong-Zhen Yu
Although solar-driven water evaporation technology is promising for desalination of seawater and purification of wastewater, it is still an issue to enhance the solar steam generation performances by efficient utilization of sustainable solar energy. Herein, 2D ferrous ion-crosslinked Ti 3 C 2 T x MXene-based aerogel films (MAFs) are fabricated as efficient solar steam generation devices by vacuum-assisted filtration of aqueous dispersions of MXene with FeCl 2 followed by freeze-drying. The strong interaction of ferrous ions with –OH groups of MXene sheets and the freeze-drying process are crucial for constructing structurally stable porous films with rough surfaces. Benefiting from the strong solar light absorption capacity and high solar-thermal energy conversion efficiency of MXene sheets, along with the hydrophilic and structurally stable porous architecture of MAFs, the average evaporation rates of an optimal MAF evaporator are as high as 1.67 and 14.52 kg m −2 h −1 with evaporation efficiencies of 94.3% and 91.7% under solar light irradiations of 1 and 10 kW m -2 , respectively. As a promising solar steam generation device, the 2D porous and hydrophilic MAF evaporator is highly efficient in generating clean water from both natural seawater and organic wastewater with satisfactory ion rejection efficiencies of close to 100%.
研究领域:
材料科学
·
能源科学
·
环境科学
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yu Zeng,Shipeng Rao,Chenhan Xiong,Guoping Du,Zhaoyang Fan,Nan Chen
Dielectric polymer composites with conducting fillers would have great potential for diverse applications if their severe leakage loss could be addressed. In this regard, ternary composites using both ceramic and conducting materials as fillers might be an enabler for high dielectric constant and low dielectric loss. Herein, ternary composites with both Ti 3 C 2 T x MXene conducting nanosheets and CaCu 3 Ti 4 O 12 (CCTO) dielectric particles embedded in silicone rubber were studied. It was found that a ternary composite with 1.2 wt% (0.40 vol%) Ti 3 C 2 T x MXene and 12 wt% (2.58 vol%) CCTO could provide an overall superior performance that include a high dielectric constant of 8.8, low dielectric loss of less than 0.0015, good thermal stability up to 450 °C, and excellent mechanical properties with tensile strength of 569 kPa, elastic module of 523 kPa and elongation at break of 333%. The outstanding performance is attributed to the improved uniform dispersion and good interfacial compatibility of mixed fillers in the polymer matrix , suggesting ternary composites might be a better option over their binary counterparts in preparing high performance dielectric composites.
研究领域:
材料科学
·
电气工程
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