Materials
·
2024
·Vol. 17
·期 10
·2292
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IF 3.1
Linghong Wu,Juan Shen,Bo Jin
Transition metal selenides have high theoretical capacities, making them attractive candidates for energy storage applications. Here, using the microwave-absorbing properties of the materials, we designed a simple and efficient microwave-assisted synthesis method to produce a composite made of nanospheres Ni0.5Co0.5Se2(NCSe) and highly conductive, stable Ti3C2TxMXene. The Ni0.5Co0.5Se2/Ti3C2Txcomposites are characterized via scanning electron microscopy, X-ray diffraction, cyclic voltammetry, and electrochemical impedance spectroscopy. The findings indicate that 3D Ni0.5Co0.5Se2bimetallic selenide nanospheres were uniformly loaded within the few-layer Ti3C2TxMXene wrapper in a short period. The optimal NCSe/Ti3C2Tx−2 electrode can demonstrate a specific capacitance of 752.4 F g–1at 1 A g–1. Furthermore, the asymmetric supercapacitor combined with activated carbon maintains a capacitance retention of 110% even after 5000 cycles. The method of directly growing active substances on few-layer Ti3C2TxMXene will provide inspiration for the manufacture of high-pseudocapacitance supercapacitors.
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2025
·
IF 2.9
Yang He,Guowei Chen,Yiping Zhao,Li Chen
The hydrophilicity of two-dimensional (2D) transition-metal carbides, carbonitrides, and nitrides (MXene) nanochannels plays a critical role in water transport during filtration, yet its specific effects on MXene membranes remain inadequately understood. Herein, we systematically investigated water transport through Ti3C2TX MXene nanochannels using molecular dynamics simulations coupled with experimental validation, addressing a significant knowledge gap in MXene-based separation membranes. Our simulations demonstrated that strong interactions between water molecules and hydrophilic nanochannel MXene surfaces (Ti3C2(OH)2 MXene or Ti3C2(NH)2 MXene) facilitated the formation of ordered molecular arrangements, substantially improving water permeability. Conversely, hydrophobic nanochannels (Ti3C2O2 MXene or Ti3C2F2 MXene) exhibited disordered water molecule distributions, leading to reduced permeability. Experimental validation corroborated these simulation results, demonstrating a direct correlation between the hydrophilicity of the Ti3C2TX surface and the water flux. The highly hydrophilic Ti3C2(OH)2 MXenes exhibited water flux maximum, whereas the more hydrophobic Ti3C2F2 MXenes had the lowest water flux. By integrating molecular dynamics simulations with experimental analyses, we gained comprehensive insights into the influence of nanochannel hydrophilicity on water transport mechanisms in MXene membranes. These findings provide critical guidelines for designing high-performance MXene-based membranes for advanced water treatment and separation applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xinghao Qu,Boyu Li,Yilong Wang,Xiyang Li,Yuping Duan,Xuefeng Zhang,Guimei Shi,Yuanliang Zhou,Xinglong Dong
Electromagnetic pollution is escalating in the advent of the 5 G and forthcoming 6 G era. Ti 3 C 2 T X MXene, an emergent two-dimensional material, has been extensively applied in the field of electromagnetic absorption and shielding owing to its high electrical conductivity, adjustable interlayer spacing, and substantial surface area. However, its practical application as an absorber is severely limited by challenges including face-to-face restacking, surface modification difficulties, and poor impedance matching. Here, carbon-coated NiFe alloy nanoparticles (NiFe@C NPs), fabricated using the DC arc-discharge technique, are electrostatically self-assembled with MXene. This process effectively reduces self-stacking and enhances impedance matching properties. The robust magnetic coupling within NiFe alloy compensates for the deficiency in the magnetic loss capacity of carbon and MXene, while defects in the carbon layer and terminal groups on MXene's surface facilitate dipolar polarization. Furthermore, the heterogeneous interfaces between NiFe@C NPs and MXene produce localized dielectric polarization fields that are conducive to enhancing interfacial polarization. Additionally, the multilayered structure of MXene promotes multiple reflections and scattering of incident electromagnetic waves. When the NiFe@C/MXene composite has a thickness of 2.3 mm, it reaches a minimum reflection loss of −38.40 dB. Computer Simulation Technology (CST) results confirm the high radar cross section reduction value (17.21 dB·m 2 ), indicating the potential of multi-component NiFe/carbon/MXene composite for microwave absorption.
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Materials Chemistry Frontiers
·
2024
·
IF 6
Shaochen Wang,Chenwei Qu,Xin Wang,Daoyong Lin,Tiantian Cao,Guoyong Huang,Shengming Xu,Jianzhong Ye
Molybdenum disulfide (MoS2) has great potential as an anode material for lithium-ion batteries due to its graphite-like layered structure and high specific capacity (669.0 mA h g−1). However, challenges such as volume expansion during lithium storage have impeded its utilization. The combined alteration of MoS2 and MXenes has demonstrated its efficacy as a modification technique. In this study, a green and facile phase engineering strategy has been implemented for the synthesis of MoS2/Ti3C2Tx nanocomposites. Ti3C2Tx was rapidly prepared by the fluorine-free molten salt etching method, and then the MoS2/Ti3C2Tx composite was synthesized by the one-pot method. Fluffy and open petal-like interconnect structures were constructed by combining few-layer MoS2 nanosheets with Ti3C2Tx substrate. The introduction of the substrate material (Ti3C2Tx) provides a uniform growth platform for MoS2 nanosheets, and Ti3C2Tx, acting as the supporting material, imparts enhanced structural stability to the composite. Theoretical calculations indicate that this configuration may result in a reduction of the diffusion energy barrier of Li+ from 0.78 eV to 0.19 eV, as well as an enhanced electron transfer. This composite material exhibits enhanced capacity performance, achieving 460.6 mA h g−1 at 0.1 A g−1 after 100 cycles. This approach offers valuable insights into the synthesis of additional high-performance composite materials.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
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IF 5.9
Tiantian Lv,Jiarong Zhang,Long Yu,Ya’nan Zhao,Tianran Zhao,Yi’na Yang,Chunna Yu,Chang Zhao,Guangjian Xing
The contamination of wastewater by organic pollutants significantly impacts human health and the environment due to their carcinogenic nature and various adverse effects. To address this issue, this study offers a high-efficiency and low-cost biomass-based carbon aerogel adsorbent, which was prepared through the hydrothermal carbonization of loofah, followed by Ti 3 C 2 T X MXene impregnation. The aerogel features a porous three-dimensional network structure and a substantial specific surface area, facilitating broad-spectrum adsorption capabilities for various dyes and drugs. The aerogel achieved impressive adsorption capacities of 175.29 and 75.73 mg/g for cationic methylene blue and Rhodamine B dyes, and 106.33 and 93.29 mg/g for anionic methyl orange and Congo red dyes, as well as 86.25 mg/g for tetracycline hydrochloride, surpassing other reported biomass-based aerogels. Furthermore, it demonstrated effective decolorization ability for wastewater containing mixed dyes. Notably, it exhibited excellent recycling and regeneration properties, maintaining a high removal rate after multiple cycles of adsorption–desorption. The adsorption process of dye/drug by the aerogel followed Langmuir’s monomolecular layer adsorption model, exhibiting spontaneous, endothermic, and disorder-increasing behavior in alignment with the pseudo-second-order kinetic model. This study presents an efficient biomass-based aerogel for the removal of organic pollutants from wastewater.
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RARE METALS
·
2025
·
IF 11
Li Tong hui,Ma Lin,Wang Li,Wang Hai bo,Li Bo,Han Meng yao,Li Diao feng,Bai Chun guang,Dong Ming dong,Shen Long hai,Ma Song,Qi Feng
The single-layer Ti 3 C 2 T x /MXene has become a special electromagnetic wave absorber near the terahertz band because of its abundant surface groups and excellent conductivity. However, the macro-preparation of single-layer Ti 3 C 2 T x /MXene shows significantly difficult to influence its application. The two-dimensional Ti 3 C 2 T x is easily prepared to have high production, but its weak absorption ability due to high surface conductivity also restricts its application. To realize the strong electromagnetic wave absorption of two-dimensional Ti 3 C 2 T x /MXene, a new strategy with magnetic FeNi nanoparticles decorating Ti 3 C 2 T x /MXene composites (FeNi-Ti 3 C 2 T x ) were proposed and the effective electromagnetic wave absorption features covering 170–220 GHz that means the absorption band width reach 50 GHz. With an absorber composite film thickness being only 0.6 mm, the absorptivity of the composite is enhanced with the increase of decorating FeNi nanoparticles and promote up to 75% when the FeNi nanoparticles loading content reaches 30 wt%. The improvement of absorption is attributed to the introduction of soft magnetic FeNi to adjust the high surface conductivity of MXene and improve the electromagnetic balance of the absorber. Graphical abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jie Wang,Guanshun Xie,Senlin Zhang,Guohao Li,Zhaohui Huang,Xiaohui Li,Xiuqiang Xie,Nan Zhang
Although MXenes have attracted significant attention across diverse fields, they exhibit a pronounced susceptibility to oxidation in aqueous environments, with oxidation significantly accelerated in the presence of transition metal ions (TMI) such as Fe 3+ and Cu 2+ . This limitation impedes the synthesis of transition metal compounds/MXene-based composites and their potential for functional applications. In this study, we elucidate the mechanism of accelerated oxidation of Ti 3 C 2 T x is that Fe 3+ promotes the electron loss in Ti 3 C 2 T x , thus leading to an increased production of hydroxyl radicals ( OH) to oxidize Ti 3 C 2 T x . Furthermore, a rational two-in-one strategy is provided with adding electron-rich ethylenediaminetetraacetic acid disodium zinc salt (ZnNa 2 EDTA) to enhance the stability of Ti 3 C 2 T x by defect filling and electron donation. Consequently, the production of OH is significantly reduced and thus Ti 3 C 2 T x remains well-preserved in the presence of Fe 3+ , which has also effectively enhanced the oxidation stability of Ti 3 C 2 T x in the presence of Cu 2+ . This work is expected to pave a new pathway for targeted applications with coexisting Ti 3 C 2 T x and TMI.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Kaixiang Ji,Peilin Wang,Yameng Li,Qiang Ma,Xingguang Su
Phthalate esters, particularly di(2-ethylhexyl) phthalate (DEHP), are widely used plasticizers found in various consumer products, posing significant environmental and health risks due to their endocrine-disrupting effects. In this study, a novel enzyme-free intra-capacitive biofuel cell self-powered sensor (ICBFC-SPS) was developed. The ICBFC-SPS integrated a ternary heterostructure-based capacitive anode and a cathode with a sensing interface into a single-chamber electrolytic cell. The ternary heterostructure based on Ti 3 C 2 T x MXene with ultra-small Au NPs and polypyrrole (PPy) NPs was prepared to provide the efficient glucose oxidation and robust electron production. Furthermore, the charge storage capacity was significantly enhanced through a synergistic combination of the double-layer capacitor mechanism of Ti 3 C 2 T x and the pseudocapacitive behavior of PPy. Additionally, the intercalation of PPy NPs expanded the interlayer spacing, promoting electrolyte ion diffusion and charge transfer. The ICBFC-SPS demonstrated exceptional sensitivity with a linear detection range from 0.05 to 100000 ng/L and a detection limit of 9.51 pg/L for the sensitive and selective detection of DEHP in complex environmental and biological samples. The ICBFC-SPS addresses the limitations of traditional methods by providing a self-powered, highly sensitive, and portable platform for rapid, on-site DEHP detection. This work underscores the potential of self-powered sensors as transformative tools for real-time environmental monitoring and public health protection.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shiyao Yan,Shiping Shao,Yunxiang Tang,Xin Zhang,Chan Guo,Luxue Wang,Jiurong Liu,Lili Wu,Fenglong Wang
Aerogel-based composites, renowned for their three-dimensional (3D) network architecture, are gaining increasing attention as lightweight electromagnetic (EM) wave absorbers. However, attaining high reflection loss, broad effective absorption bandwidth (EAB), and ultrathin thickness concurrently presents a formidable challenge, owing to the stringent demands for precise structural regulation and incorporation of magnetic/dielectric multicomponents with synergistic loss mechanisms within the 3D networks. In this study, we successfully synthesized a 3D hierarchical porous Fe3O4/MoS2/rGO/Ti3C2Tx MXene (FMGM) composite aerogel via directional freezing and subsequent heat treatment processes. Owing to their ingenious structure and multicomponent design, the FMGM aerogels, featured with abundant heterogeneous interface structure and magnetic/dielectric synergism, show exceptional impedance matching characteristics and diverse EM wave absorption mechanisms. After optimization, the prepared ultralight (6.4 mg cm–3) FMGM-2 aerogel exhibits outstanding EM wave absorption performance, achieving a minimal reflection loss of −66.92 dB at a thickness of 3.61 mm and an EAB of 6.08 GHz corresponding to the thickness of 2.3 mm, outperforming most of the previously reported aerogel-based absorbing materials. This research presents an effective strategy for fabricating lightweight, ultrathin, highly efficient, and broad band EM wave absorption materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Dawei Wang,Yue Lian,Qiuping Zhou,Hongliang Fu,Yongfeng Hu,Jing Zhao,Huaihao Zhang
The Ti 3 C 2 T x MXene with unique two-dimensional layered structure is a promising material for energy storage. However, the self-stacking behavior of MXene nanosheets limits its electrochemical performance. In this study, a heterostructured composite has been developed by intercalating cuttlefish ink-derived carbon nanospheres into layers of Ti 3 C 2 T x MXene nanosheet through an electrostatic self-assembly method. This design effectively increases the interlayer spacing of MXene, and prevents it from tightly stacking. The heterostructure enlarges the specific surface area and exposes more active sites, thus improving the charge storage capacity and ion/electron transport. In Addition, the heterostructure buffers the volume changes of electrode material during charge-discharge processes, resulting in enhanced cycling stability. Density functional theory (DFT) calculations confirmed that the heterostructure effectively modulates the electronic structure of MXene. Compared to pure MXene, the composite exhibits significantly improved specific capacitance (264 F g −1 at 0.5 A g −1 ), better rate capability (76.9 % capacitance retention from 0.5 A g −1 to 10 A g −1 ) and greater cycling stability (93.4 % capacitance retention after 5000 cycles). Based on this electrode material, the assembled symmetric supercapacitor achieves 12.8 Wh kg −1 of energy density at 0.2 kW kg −1 of power density and a capacitance retention of 91.7 % after 5000 cycles.
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CARBON
·
2025
·
IF 11.6
Jing Li,Lingling He,Weimin Xia,Chao Du,Li He,Xiao Li,Caiyin You,Di Zhou
Ti 3 C 2 T x MXene nanosheets have introduced significant potential for enhancing impedance matching, fine-tuning electromagnetic parameters, and improving microwave absorption performance. However, substantial challenges remain regarding the performance in low-frequency (2–8 GHz) microwave absorption. Herein, a facile electrostatic self-assembly approach and modified etching method is employed to construct the heterogeneous interfaces by integrating LiFe 5 O 8 nanoparticles with MXene nanosheets. The results indicate that the epitaxial growth of LiFe 5 O 8 nanoparticles on the MXene surface could enhance interfacial polarization. Furthermore, the heterogeneous structure improves the magnetic coupling and the electromagnetic waves (EMW) reflection. Notably, the minimum reflection loss (RL) value is −60.58 dB at 5.52 GHz in C band when the MXene to LiFe 5 O 8 ratio is 1:4. Moreover, the minimum RL is −61.75 dB at a thickness of 2.46 mm and an effective absorption bandwidth (EAB) reaches 6 GHz at 1.63 mm when the MXene to LiFe 5 O 8 ratio is 1:2. Additionally, the MXene/LiFe 5 O 8 nanocomposites exhibit varying degrees of absorption across C, X, and Ku bands, signifying the enhancement of microwave absorption performance across frequency bands. This design strategy offers a novel approach for developing microwave absorption materials characterized by high absorption efficiency and wide bandwidth in low-frequency.
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