JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jin Chen,Jing Zhang,Xinle Wang,Yuzhao Ma,Xiaofeng Yang,Kai Gu,Yanjun Li
The optimization of electromagnetic wave (EMW) absorption performance in MXene-based absorbers can be effectively achieved through structural engineering and component design. Herein, the chemical shear effect of various alkaline solutions applied to MXene is significantly reflected in the electromagnetic wave absorption properties. Furthermore, the incorporation of metal-organic frameworks (MOFs) enhances the synergistic microwave absorption performance of the composite material. The alkalization treatment induces a 'shear effect' on MXene, resulting in the formation of a honeycomb single-layer microstructure on its surface. Additionally, the chemical deposition reaction facilitates the deposition of ZIF-67 onto the alkalized MXene. The resulting MOF-derived carbon adsorbent exhibits pronounced magnetic loss and dielectric loss characteristics. Notably, the NMXene/CNTs/Co (NMCC-70) composites exhibit exceptional EMW absorption performance following NH 3 ·H 2 O alkalinization treatment, with a minimum reflection loss (RL min ) of −66.5 dB and an effective absorption bandwidth (EAB) of 4.5 GHz. The intricate porous structure of alkalized MXene, combined with the synergistic effects of ZIF-67, renders its derivatives particularly promising for applications in electromagnetic wave absorption.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yubo Zou,Huili Liu,Guocong Liu,Binyi Yang,Jiajia Li,Shanxing Wang,Kaiping Xie,Chunhua Wang,Shahid Iqbal
Efficiently preparing polyaniline (PANI) supercapacitor electrode materials with exceptional electrochemical performance is vital for their utilization in energy storage devices, notwithstanding the difficulties involved. We developed a direct hydrothermal assembly approach to construct MXene-modified PANI hydrogel (M-PANI) using PANI dispersion modified by highly conductive MXene. The findings suggest that the breakdown of MXene nanosheets and the conversion into TiO 2 from part of MXene by hydrothermal treatment may notably boost the electrochemical performances of M-PANI hydrogels. The prepared M-PANI hydrogel electrodes exhibit high specific capacitance (483.1 F g −1 at 1 A g −1 ), superior rate capability (79.8 % from 1 to 20 A g −1 ), and valuable cycling durability (80 % of initial capacitance after 6000 cycles). The flexible asymmetric supercapacitors (MXene//M-PANI) were further assembled using MXene as anode and M-PANI as cathode materials, which achieve high specific capacitance (128.2 F g −1 at 1 A g −1 ), satisfying energy density (23.6 W h kg −1 at 575 W kg −1 ), and favorable cycling durability (89.4 % retention of the initial capacitance after 9000 cycles). The generated M-PANI hydrogels with remarkable electrochemical performances as supercapacitor electrodes suggest their enormous potential in the field of cutting-edge energy storage technology.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Nijuan Liu,Yuanzhuo Li,Nana Wang,Fupeng Jin,Duoqiang Wang,Ruijuan Wang,Hongping Zhang,Hao Liang,Ruibin Guo,Wei Tian,Zunli Mo
The extraction of uranium from seawater is crucial for the advancement of sustainable energy development, driving urgent demands for high-performance adsorbents. Herein, a composite adsorbent was engineered based on MXene nanosheets. To address the self-stacking issue of the nanosheets, polyacrylamide (PAM) was intercalated as a molecular spacer, which was followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the modified MXene nanosheet surface. The material exhibited a hierarchical pore structure and high specific surface area (604 m2/g), facilitating active site exposure. Maximum uranium adsorption capacity reached 909 mg/g at pH 4.0 and 298 K, with high selectivity. Adsorption kinetics conformed to a pseudo-second-order model, isotherms aligned with the Temkin model, and thermodynamics revealed a spontaneous, endothermic process. FT-IR and XPS spectroscopy confirmed the UO22+ coordination with MXene (Ti–O, –COOH), PAM (–NH2), and ZIF-8 (pyrrole-N, Zn–O). The material maintained stable performance in complex aqueous environments, exhibiting uranium adsorption capacities of 33, 34, and 37 mg/g in spiked salt lake water, seawater, and Yellow River water systems, respectively. This work has provided valuable insights for designing MXene-based adsorbents for uranium extraction from natural water.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lihua Shen,Jiaming Peng,Qili Chen,Yaozhou Zhang,Chunxia Yu,Yuchen Tang,Jin Li,Kunpeng Zhao,Zhifang Zhang
The development of rapid, sensitive ammonia (NH 3 ) sensors is crucial for emergency response as NH 3 poses serious health risks. We report a high-performance chemiresistive sensor based on Ti 3 C 2 MXene@sulfur nanosheet (MXene@S-NSs) composites that addresses the conductivity limitations of pure S-NSs. The composite combines MXene’s excellent conductivity with S-NSs’ semiconductor properties to create room-temperature NH 3 sensors with exceptional performance: 3 ppt detection limit, 375 % response signal, and remarkably fast response/recovery times of 5 s/4s − representing a significant improvement over pure S-NSs sensors. This enhancement arises from optimized charge transport through p-n heterojunctions and sulfur vacancies in the composite structure. The MXene@S-NSs material demonstrates outstanding sensitivity, stability, and response speed, making it particularly suitable for emergency NH 3 monitoring applications. This work not only presents a practical sensor solution but also establishes an effective materials design strategy for developing next-generation gas sensors through rational 2D material hybridization. The successful integration of MXene and S-NSs provides a blueprint for creating advanced sensing materials with tailored electronic properties and performance characteristics.
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高影响因子
RARE METALS
·
2025
·
IF 11
Wang Long-Yan,Fan De-Qi,Li Yi,Zhao Cheng-Xiao,Yang Xiao-Fei
Metalloporphyrins featuring structurally tunable aromatic macrocycles and versatile metal coordination sites are widely recognized as promising molecular catalysts for photocatalytic carbon dioxide reduction. However, their catalytic performances are constrained by rapid recombination of photogenerated charge carriers, insufficient charge transfer efficiency, and structural instability caused by molecular aggregation. Anchoring metalloporphyrins onto conductive substrates, in particular ultrathin two-dimensional (2D) nanostructures, can effectively accelerate interfacial charge transport efficiency, thereby improving photocatalytic activity toward CO 2 reduction. In this work, a novel 2D/2D heterojunction was designed and synthesized, which can serve as a highly efficient molecular catalyst for visible-light-driven CO 2 reduction. The abundant Co centers and N-sites in the assembled cobalt-coordinated porphyrin nanobelts can greatly enhance the adsorption and conversion of CO 2 . Meanwhile, the presence of few-layer Ti 3 C 2 MXene nanosheets enables the accelerated interfacial charge transport from photoexcited metalloporphyrin to Ti 3 C 2 MXene. Rapid electron transfer is verified by Kelvin probe force microscopy (KPFM), in situ attenuated total reflectance-Fourier transform infrared (ATR-FTIR), and irradiated X-ray photonelectron spectroscopy (XPS). As expected, compared to pristine porphyrin, the metalloporphyrin/Ti 3 C 2 MXene heterojunction shows a 12.5-fold increase in the photocatalytic activity for CO 2 reduction to CO. Graphical abstract
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高影响因子
ELECTROANALYSIS
·
2022
·Vol. 34
·期 8
·1329-1337
·
IF 3.077
Jie Liu,Dianping Tang
A simple and novel electrochemical immunoassay based on MXene (Ti 3 C 2 )−Au nanoparticles (AuNPs) was designed for sensitive screening of a disease-related biomarker, prostate-specific antigen (PSA), by using dopamine-loaded liposomes (DLL) for signal amplification. The system involves two parts, namely, sandwich-type immunoreaction to capture DLL and electrochemical measurement of dopamine. The target PSA can cause a specific antigen-antibody reaction and DLL are enriched in the enzyme-labeled pores. After Triton X-100 is injected into the detection cell, the carried DLL was quickly cracked to release dopamine wrapped in the cavity. A nanocomposite consisting of MXene (Ti 3 C 2 ) support to immobilize Au nanoparticles (Ti 3 C 2 −Au) was utilized to modify a glassy carbon electrode, which gives a strongly enhanced differential pulse voltammetric (DPV) signals for dopamine. In this case, the change of DPV signal depends on the amount of dopamine released by liposomes, which is further positively correlated with the concentration of the analyte PSA. Combining the of MXene (Ti 3 C 2 )−AuNPs nanomaterials (large specific surface area, excellent electrical conductivity, and good electrocatalytic properties) with the liposome signal amplification strategy, the electrochemical immunoassay exhibited excellent performance toward PSA determination with a broad linear range of 1 pg/mL to 50 ng/mL and limit of detection down to 0.31 pg/mL (S/N=3) under the optimized testing conditions. High specificity for PSA over other disease-related biomarkers and acceptable nanocomposite/electrode stability were acquired. The excellent analytical performance shows that the current strategy provides an effective detection platform for clinical sample analysis.
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高影响因子
Nanoscale
·
2018
·Vol. 10
·期 20
·9642-9652
·
IF 7.233
Zhimin Fan,Youshan Wang,Zhimin Xie,Xueqing Xu,Yin Yuan,Zhongjun Cheng,Yuyan Liu
MXene films are attractive for use in advanced supercapacitor electrodes on account of their ultrahigh density and pseudocapacitive charge storage mechanism in sulfuric acid. However, the self-restacking of MXene nanosheets severely affects their rate capability and mass loading. Herein, a free-standing and flexible modified nanoporous MXene film is fabricated by incorporating Fe(OH)3 nanoparticles with diameters of 3–5 nm into MXene films and then dissolving the Fe(OH)3 nanoparticles, followed by low calcination at 200 °C, resulting in highly interconnected nanopore channels that promote efficient ion transport without compromising ultrahigh density. As a result, the modified nanoporous MXene film presents an attractive volumetric capacitance (1142 F cm−3 at 0.5 A g−1) and good rate capability (828 F cm−3 at 20 A g−1). Furthermore, it still displays a high volumetric capacitance of 749 F cm−3 and good flexibility even at a high mass loading of 11.2 mg cm−2. Therefore, this flexible and free-standing nanoporous MXene film is a promising electrode material for flexible, portable and compact storage devices. This study provides an efficient material design for flexible energy storage devices possessing high volumetric capacitance and good rate capability even at a high mass loading.
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PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Weitao Shi,Feifan Hong,Renhuan Li,Ruolin Zhao,Sizhi Ding,Ziqi Liu,Peilin Qing,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
MgH 2 is a promising high-capacity solid hydrogen storage material. In this work, MnO 2 -doped Ti 3 C 2 (Ti 3 C 2 @MnO 2 ) was synthesized and used as a catalyst to improve the hydrogen storage performance of MgH 2 . We found that the dehydrogenated 10 wt% Ti 3 C 2 @MnO 2 -doped MgH 2 sample exhibited good hydrogen adsorption ability even at room temperature (30 °C), and could absorb 5.13 wt% of hydrogen in 400 s at 75 °C. The re‑hydrogenated Ti 3 C 2 @MnO 2 -doped MgH 2 sample started to release hydrogen at 182 °C and required 484 s to completely release hydrogen at 275 °C with a dehydrogenation capacity of 6.4 wt%. The Ti 3 C 2 @MnO 2 composite did not change the thermodynamic properties of MgH 2 . In the MgH 2 + Ti 3 C 2 @MnO 2 sample, Ti 3 C 2 , TiO 2 , MnO 2 , MnO, and Mn combined with MgH 2 to form Ti 3 C 2 /MgH 2 , TiO 2 /MgH 2 , MnO 2 /MgH 2 , MnO/MgH 2 , and Mn/MgH 2 multiphase interfaces, which improved the hydrogen storage performance of MgH 2 . The findings of this work may provide a new strategy for preparing novel and efficient catalysts for hydrogen storage applications.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Jin-Feng Jia,Tong Tong Hao,Pei-Hsuan Chen,Feng-Yi Wu,Wei Zhu,Sung-Fu Hung,Nian-Tzu Suen
Herein, we propose a simple yet effective method to deposit metal nanoparticles on Ti3C2Tx-MXene via direct electrosynthesis. Without using any reducing reagent or annealing under reducing atmosphere, it allows the conversion of metal salts (e.g., PtCl4, RuCl3·yH2O, IrCl3·zH2O, AgNO3, and CuCl2·2H2O) to metal nanoparticles with a small particle size (ca. 2 nm). Under these circumstances, it was realized that the support effect from Ti3C2Tx-MXene (electron pushing) is quite profound, in which the Ti3C2Tx-MXene support will act as an electron donor to push the electron to Pt nanoparticles and increase the electron density of Pt nanoparticles. It populates the antibonding state of Pt–Pt bonds as well as the adsorbate level that leads to a “weakening” of the ΔGH* in the optimal position. This rationalizes the outstanding activity of Pt/Ti3C2Tx-MXene (5 wt %, η10 = 16 mV) for the hydrogen evolution reaction (HER). In addition, this direct electrosynthesis method grants the growth of two or multiple types of metal nanoparticles on the Ti3C2Tx-MXene substrate that can perform dual or multiple functions as desired. For instance, one can prepare an electrocatalyst with Pt (2.5 wt %) and Ru nanoparticles (2.5 wt %) on the Ti3C2Tx-MXene support from the same synthetic method. This electrocatalyst (Pt_Ru/Ti3C2Tx-MXene) can display good electrocatalytic HER performance in both acid (0.5 M H2SO4) and alkaline electrolytes (1.0 M KOH).
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PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 4
·882-891
·
IF 3.552
Fan Yiyi,Li Jinyong,Wang Saidi,Meng Xiuxia,Jin Yun,Yang Naitao,Meng Bo,Li Jiaquan,Liu Shaomin
Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H 2 . Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni 2+ were assembled to form an MSM supported on Al 2 O 3 hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H 2 /CO 2 mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10 −8 mol·m −2 ·s −1 ·Pa −1 . Compared with the original Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes, the permeation of hydrogen through the Ni 2+ -Ti 3 C 2 T x /Al 2 O 3 membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni 2+ . The interlayer spacing of MSMs was tuned by Ni 2+ . During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni 2+ tailored Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes can inspire promising industrial applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bingbing Chen,Aihu Feng,Ruixiang Deng,Kun Liu,Yun Yu,Lixin Song
Capacitive deionization (CDI) has become a promising method to solve the shortage of freshwater resources recently. However, the co-ion expulsion effect obviously hinders electrosorption capacity and charge efficiency of CDI. In this work, an asymmetric CDI cell is assembled in which Na+-intercalated Ti3C2Tx (NaOH-Ti3C2Tx) serves as a cation-selective cathode, while the activated carbon (AC) serves as the anode. The NaOH-Ti3C2Tx with negatively charged surface groups (−OH, −O, and −F) is adopted to weaken the co-ion expulsion effect. Benefited from the synergistic effect of the reduced co-ion expulsion effect and expanded interlayer space, the asymmetric CDI cell achieves a higher electrosorption capacity of 12.19 mg g–1 and a higher charge efficiency of 0.826 compared with the symmetric one composed of AC (4.55 mg g–1 and 0.306) in 100 mg L–1 NaCl solution. High cyclic stability of the as-prepared asymmetric CDI cell is also observed. The improved desalination performance indicates that NaOH-Ti3C2Tx is a promising alternative as cation-selective cathode material for asymmetric CDI cells. The desalination mechanism is discussed in detail to lay the foundation for further improvement of the CDI performance of other 2D materials like MXene.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yue Liu,Na Wu,Sinan Zheng,Yunfei Yang,Bin Li,Wei Liu,Jiurong Liu,Zhihui Zeng
The development of flexible composites based on the transition metal carbides/nitrides (MXenes) is gaining popularity because of MXenes’ high application potentials for electromagnetic interference (EMI) shields. Here, we prepare a new type of ultraflexible composite films composed of “trashed” MXene sediment (MS) and waterborne polyurethane using a simple, facile solution casting approach. In addition to the outstanding mechanical strength and electrical conductivity, an extremely wide-range of MS contents can be achieved for the composites, resulting in EMI shielding effectiveness (SE) that may be controlled over a wide range. The X-band EMI SE of the flexible, low-density composites containing 70 wt % MS reaches 45.3 dB at a thickness of merely 0.51 mm. Moreover, the SE values of more than 34.5 dB in the ultrabroadband gigahertz frequency range including X-band, P-band, K-band, and R-band, are accomplished for the thin composites. Furthermore, the MS/WPU composite films show excellent electrothermal and photothermal performance, demonstrating the multifunctionalities of the MS-based EMI shields. Combined with the cost-efficient, sustainable, and scalable preparation approach, the ultraflexible, multifunctional composites from “trashed MXene” show great potentials for next-generation electronics. This work also opens a new avenue for the creation of innovative, high-performance, multifunctional flexible composites.
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