SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Cuilian Wei,Haowei Tu,Pengcheng Zhang,Jiafeng Ouyang,Liyong Yuan,Zijie Li,Nannan Wang,Yanqiu Zhu,Kang Liu,Lin Wang,Weiqun Shi
The construction of novel MXene-based composites with superb abilities through functionalization is an effective strategy to enhance the potential of this emerging inorganic lamellar material for environmental adsorption applications. The present work systematically investigated the adsorption performance of Ti 3 C 2 T x MXene modified with phosphate functional groups that facilitate the capture of uranyl ions. After introducing phosphate groups via a two-step modification of 3-aminopropyltriethoxysilane (APTES) and phytic acid (PA), the synthesized Ti 3 C 2 -APTES-PA is significantly superior to pristine Ti 3 C 2 T x nanosheets in terms of adsorption capacity, adsorption selectivity and reusability for uranium. The maximum uptake capacity of Ti 3 C 2 -APTES-PA at pH = 5 reaches 323 mg/g, which is 2.5 times higher than that of unmodified MXene. Furthermore, the large selectivity coefficient (S U/M > 16.2) declares that Ti 3 C 2 -APTES-PA preferentially adsorbs uranium among substantial competing ions. Ti 3 C 2 -APTES-PA also shows good cycling performance that its adsorption capacity remained 92.3 % after 6 cycles. When it comes to treating simulated uranium tailings pond leachate and radioactive wastewater from mines, high U(VI) removal rates of 88.9 % and 96.8 % can be achieved by our ternary composite at a dosage of 0.05 g/L. The underlying adsorption mechanism was unraveled by spectroscopic analysis to be the formation of coordination complexes of uranyl ions with phosphate groups on PA and hydroxyl groups on Ti 3 C 2 T x substrate, as well as the reduction of a small amount of adsorbed U(VI) to U(IV) by MXene. The overall results imply that Ti 3 C 2 -APTES-PA is an effective uranium chelating scavenger for the treatment of environmental radioactive wastewater.
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DOI
高影响因子
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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高影响因子
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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高影响因子
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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DOI
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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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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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DOI
高影响因子
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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高影响因子
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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高影响因子
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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高影响因子
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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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xusheng Dong,Ruizheng Zhao,Bin Sun,Tengsheng Zhang,Boya Wang,Yanyan He,Tingting Gao,Dongliang Chao,Guowei Zhou
Transition metal selenides are regarded as potential sodium storage materials for their high theoretical capacity and superior electrical conductivity. However, unsatisfied cycle stability and rate capability, which is caused by its intrinsic structural instability and sluggish conversion reaction, greatly hinder the application. Herein, in-situ electrostatic attraction and selenization process are used to construct Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x composite, in which the homogeneous Ni 0.5 Co 0.5 Se 2 nanoparticles are anchored in the Ti 3 C 2 T x MXene architecture. Based on the unique confinement effect and strong chemical interface coupling, the volume expansion and aggregation of the Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode during the cycling process are effectively prevented. Furthermore, the evenly Ni 0.5 Co 0.5 Se 2 bimetallic selenides nanoparticles endow rapid charge transfer and redox kinetics due to shortened Na + diffusion distance and more accessible active sites. As a result, the as-prepared Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode exhibits long cycle stability over 1000 cycles at 2.0 A g −1 , pushing forward the construction of advanced conversion-type anode for high-performance sodium-ion batteries.
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高影响因子
危险品化学品经营许可证（带存储）