JOURNAL OF PHYSICAL CHEMISTRY B
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2025
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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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PubMed
高影响因子
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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ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Qicheng Zhang,Yong Li,Fei Liang,Haoran Zhang,Bin Wang,Xiaopeng Li,Zifeng Lin,Yan Lin,Xiang Chen
The inferior tribological properties of titanium (Ti) and its alloys, due to their limited work hardening capability and the mechanical instability of their oxide scale, pose substantive challenges in practical applications. Surface texturing and the application of 2D material coatings are acknowledged as efficacious strategies for enhancing these properties. Nevertheless, the rapid loss of effectiveness when employing these methods in isolation highlights a significant limitation. Herein, a 50-nm-thick MXene nanocoating is deposited onto groove-textured pure Ti surface, effectuating a reduction in the coefficient of friction (COF) from ≈0.57 to 0.17, thereby substantially mitigating wear on the Ti substrate. The grooved surface architecture plays a vital role in storing MXenes and facilitating lubricant replenishment through the stirring effect of frictional stress during subsequent friction process. Further, the continuous decomposition and reorganization of MXene coating results in the formation of a robust tribofilm that resists oxidation and plastic deformation in the subsurface layer, markedly enhancing the friction and wear resistance. These findings are crucial for improving tribological performance in Ti and its alloys and provide a straightforward yet effective strategy for tailoring their tribological properties by integrating LST with 2D material nanocoating.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Lu Luo,Qiuyan Kong,Qianqian Zhang,Jing Zhang,Mizi Fan,Weigang Zhao
Layered double hydroxides (LDH) and two-dimensional metal carbides (Ti 3 C 2 T x ) garner significant attention in recent years. LDH/Ti 3 C 2 T x nanohybrids combine the unique characteristics of individual component, making them a promising option for high-power energy storage applications. Here, we present a composite electrode constructed by synergistic coupling of Ti 3 C 2 T x and ternary hydrotalcite (NiCoMn-LDH). Strong interfacial interactions between the NiCoMn-LDH array and Ti 3 C 2 T x nanoflakes, along with effective electron coupling, contribute to enhanced structural stability, conductivity, and electrolyte accessibility, thereby significantly promoting the kinetics of redox reactions . The intriguing “lace-like” structure fully utilizes the high activity of NiCoMn-LDH and the excellent conductivity of Ti 3 C 2 T x , allowing LDH/Ti 3 C 2 T x to exhibit an impressive output capacitance of 1102.9 F g −1 at 1 A g −1 , coupled with notable rate capability (66.87 % at 20 A g −1 ). The constructed LDH/Ti 3 C 2 T x //AC hybrid supercapacitor (HSC) achieves a remarkable energy density of 47.3 Wh kg −1 at 800 W kg −1 . Following 5000 cycles, the specific capacity of HSC decreases by merely 8.3 %, while achieving a Coulombic efficiency of 99 %, showcasing remarkable durability and reversible reaction characteristics. This study provides a streamlined and effective methodology for crafting LDH/Ti 3 C 2 T x nanohybrids, showcasing robust coupled interfaces and exceptional electrochemical energy storage application.
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Journal of Materials Research and Technology-JMR&T
·
2025
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IF 6.6
Xinru Gong,Haohao Zou,Huadong Ye,Weiwei Zhu,Ying Han,Zhenxin Duan,Suqiu Jia,Xu Ran
In this study, copper (Cu) nanoparticles (NPs)-modified Ti 3 C 2 T x MXene nanosheets (Ti 3 C 2 T x @Cu) were synthesized via chemical reduction. Subsequently, Ti 3 C 2 T x @Cu/Cu composite powder was synthesized via low-energy ball milling, followed by rapid hot pressing to fabricate Ti 3 C 2 T x @Cu/Cu composites. The influence of Ti 3 C 2 T x @Cu content on the microstructure, mechanical properties, and tribological performance of Ti 3 C 2 T x @Cu/Cu composites was systematically investigated. With increasing Ti 3 C 2 T x @Cu content (0–10 vol%), the Brinell hardness of the composites gradually increased, while the tensile strength showed an initial increase to a maximum of 311.59 MPa at 3 vol%, and then gradually decreased. The main reason for this improvement was the enhancement effect of Ti 3 C 2 T x @Cu. Moreover, Ti 3 C 2 T x @Cu effectively enhanced the tribological performance of the Cu matrix, attributed to the synergistic effect of Ti 3 C 2 T x MXene nanosheets and Cu NPs. These components could get adsorbed onto the surface of the friction pairs and induce tribochemical reactions, resulting in the formation of Fe 2 O 3 and CuO. Consequently, a stable protective film composed of Fe 2 O 3 /CuO/Ti 3 C 2 T x MXene was formed on the worn surface, thereby reducing friction.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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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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ACS Nano
·
2022
·
IF 18.027
Rui Ma,Xujing Zhang,Jingting Zhuo,Lingyun Cao,Yutong Song,Yajiang Yin,Xiaofeng Wang,Guowei Yang,Fang Yi
MXenes have shown great potential for supercapacitor electrodes due to their unique characteristics, but simultaneously achieving high capacitance, rate capability, and cyclic stability along with good mechanical flexibility is exceptionally challenging. Here, highly enhanced capacitance, rate capability, and cyclic stability, as well as good mechanical flexibility for T3C2Tx MXene-based supercapacitor electrodes are simultaneously obtained by engineering the electrode structure, modifying the surface chemistry, and optimizing the fabrication process via an optimized integration approach. This approach combines and more importantly optimizes three methods that all require a calcination process: carbonizing in situ grown polymer (“Cpolymer”) on the MXene, alkali treatment (“A”), and template sacrificing (“P”); and the optimized processes lead to more abundant active sites, faster ion accessibility, better chemical stability, and good mechanical flexibility. The obtained P-MXene/Cpolymer-A electrodes are binder-free and self-supporting and not only have good mechanical flexibility but also demonstrate much larger capacitances and better rate performance than the pristine MXene electrode. Specifically, the P-MXene/CPAQ-A electrode (PAQ: quinone-amine polymer) achieves a high capacitance of 532.9 F g–1 at 5 mV s–1, together with superior rate performance and improved cyclic stability (97.1% capacitance retention after 40 000 cycles at 20 A g–1) compared with the pristine MXene (79.6% retention) and P-MXene-A (77.3% retention) electrodes. In addition, it is discovered that carbonizing in situ grown polymers can variously remove the −F group and the removal effect can be accumulated with that by the alkali treatment.
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MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Wei Wan,Jie Zhou,Yan Li,Jiamin Xiao,Junrong Luo,Yuqian Yang,Lei Yu,Yuejun Ouyang
Flexible dielectrics with exceptional dielectric properties are highly desirable for various electronic applications. In this study, we successfully fabricated CaCu 3 Ti 4 O 12 (CCTO)/Ti 3 C 2 T x MXene/millable polyurethane (MPU) ternary composite films via a combination of mixing and hot compression techniques. The incorporation of 2D Ti 3 C 2 T x MXene nanosheets at a mass fraction of 4 % significantly enhanced the dielectric properties of the composite films. Specifically, the dielectric constant at 100 Hz increased to 41.1, representing a 14.48 % improvement over the initial CCTO/MPU composite. Meanwhile, the dielectric loss remained low at 0.050, with only a marginal increase of 2.04 %. Additionally, the breakdown strength of the composite films was notably boosted to 19.15 kV/mm, demonstrating a 15.3 % enhancement. These findings highlight the substantial improvement in the dielectric performance of the CCTO/Ti 3 C 2 T x /MPU ternary composite films, showcasing their potential for high-performance electronic applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
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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.
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iScience
·
2023
·
IF 5.8
Guohong Wang,Minghang Li,Jianxi Liu,Fang Ye,Laifei Cheng,Xiaomeng Fan,Xingmin Liu,Ralf Riedel
MXenes have been proven to be outstanding lossy phase of advanced electromagnetic interference (EMI) shielding materials. However, their poor tolerance to oxygen and water results in fast degradation of the pristine two-dimensional (2D) nanostructure and fading of the functional performance. Herein, in this research, natural antioxidants (e.g., melatonin, tea polyphenols, and phytic acid) were employed to protect the Ti 3 C 2 T x MXene from its degradation in order to achieve a long-term stability of the EMI shielding performance. The results showed that the synthesized composites comprised of antioxidants and Ti 3 C 2 T x exhibited a decelerating degradation rate resulting in an improved EMI shielding effective (SE) stability. The antioxidation mechanism of the applied antioxidants is discussed with respect to the nanostructure evolution of the Ti 3 C 2 T x MXene. This work contributes to the basic foundations for the further development of advanced MXenes for stable applications in the EM field.
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ACS Omega
·
2021
·
IF 3.512
Yu Wu,Danjiao Zhao,Jidi Zhang,Aiping Lin,Yu Wang,Lei Cao,Shufen Wang,Shixian Xiong,Feng Gu
Additive manufacturing techniques have revolutionized the field of fabricating micro-supercapacitors (MSCs) with a high degree of pattern and geometry flexibility. However, traditional additive manufacturing processes are based on the functionality of microstructural modulation, which is essential for device performance. Herein, Ti3C2Tx MXene was chosen to report a convenient aerosol jet printing (AJP) process for the in situ curling and alignment of MXene nanosheets. The aerosol droplet provides a microscale regime for curling MXene monolayers while their alignment is performed by the as-generated directional stress derived from the quasi-conical fiber array (CFA)-guided parallel droplet flow. Interdigital microelectrodes were further developed with the curled MXene and a satisfying areal capacitance performance has been demonstrated. Importantly, the AJP technique holds promise for revolutionizing additive manufacturing techniques for fabricating future smart microelectronics and devices not only in the microscale but also in the nanoscale.
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