JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Qingwei Li,Kai Nan,Wei Wang,Hao Zheng,Kaikai He,Yan Wang
Electromagnetic (EM) pollution can disrupt the functioning of advanced electronic devices, hence it’s necessary to design EM wave absorbers with high-level absorption capabilities. The Ti 3 C 2 T x (MXene) is classified as a potential EM absorbing material; nevertheless, the lack of magnetic loss mechanism leads to its inadequate EM absorbing performance. On this basis, a novel composite design with promising EM absorption properties is hypothesized to be the integration of few-layer MXene and heterogeneous magnetic MOF derivatives (Fe 3 O 4 /C) with complementary advantages. Herein, we synthesized two-dimensional (2D) interfacial-polarization-enhanced MXene hybrid (Fe 3 O 4 /C/MXene) by electrostatic assembly. It is notable that the interfacial polarization is realized by adding a small amount of magnetic Fe 3 O 4 /C. Furthermore, the Fe 3 O 4 /C/ MXene demonstrates an astonishing effective absorption bandwidth (EAB) of 10.7 GHz and an excellent EM wave absorption performance (RL min ) of −66.9 dB. Moreover, the radar cross section (RCS) of Fe 3 O 4 /C/MXene is lower than −15.1 dB m 2 from −90° to 90° with a minimum RCS value of −52.6 dB m 2 at 32°. In addition, the significant attenuation of the EM wave is due to the synergistic effect of improved impedance matching, dielectric loss, and magnetic loss. Thus, the magnetized Fe 3 O 4 /C/MXene hybrid is expected to emerge as a strong contender for high-performance EM wave absorbers.
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Materials Today Chemistry
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2024
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IF 6.7
Xiangjun Li,Rongtao Wu,Yuxin Shi,Shijie Ding,Miaomiao Li,Shiwei Xu,Bing Zhang,Libo Tong,Qingjuan Wang
The anti-corrosion/anti-wear advantages of Ti 3 C 2 T x MXenes are limited in environmentally friendly water-based resins due to their instability in aqueous environments and poor compatibility with polymers. In this study, a dual-functional waterborne polyurethane (WPU)/Ti 3 C 2 T x MXene hybrid coating with excellent corrosion resistance and wear resistance is designed. This strategy uses dopamine-grafted Ti 3 C 2 T x MXene sheets to enhance the dispersibility and compatibility of Ti 3 C 2 T x MXene nanosheets in WPU through covalent and hydrogen bonds and can alleviate the oxidation of Ti 3 C 2 T x MXene in aqueous solution. In 3.5 wt% NaCl solution, PMXene and WPU composite (WPU@PMXene) coating has the lowest corrosion current density of 7.73 × 10 −8 A cm −2 and the highest polarization resistance of 1.22 × 10 7 Ω cm 2 , which is better than that of bare Mg alloys 3 orders of magnitude. The |Z| f = 0.01Hz value of WPU@PMXene coating is 3 orders of magnitude higher than that of pure WPU coating. In addition, the wear rate of WPU@PMXene coating is reduced from 2.93 × 10 −3 mm 3 /(N·m) of pure WPU to 0.9 × 10 −3 mm 3 /(N·m) (reduced by 3 times). The improved performance is due to the “labyrinth effect” and increased compatibility of dopamine modified Ti 3 C 2 T x MXene. This synergistic effect exploits a novel and convenient approach of expanding the application of Ti 3 C 2 T x MXene in aqueous coatings to enhance corrosion and wear resistance.
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Surfaces and Interfaces
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2024
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IF 5.7
Xu Yuan,Wei Wang,Cuiting Du,Qianqian Kang,Zhipeng Mao,Shougang Chen
The present study reports on a composite coating exhibiting noise reduction and anti-corrosion properties. We successfully synthesized a Ti 3 C 2 T x @TiO 2 -PDA composite filler that involves growing porous TiO 2 onto lamellar MXene (Ti 3 C 2 T x) material and further coating both surfaces with a layer of polydopamine (PDA) material, providing the coating material with a micro-cavity structure to enhance its ability to dissipate acoustic energy and resist corrosion. And we incorporated it into the prepared disulfide bond-modified polyurethane coating matrix. Experimental tests and finite element analysis demonstrate that the coating can reduce environmental noise by approximately 33% while maintaining a maximum impedance modulus |Z| of 5.51 × 10 7 Ω·cm 2 after immersion in a 3.5 wt% NaCl solution for 25 days. The porous structure of the composite filler provides micro-cavities within the coating, while its lamellar structure acts as a physical barrier against corrosive media. Furthermore, introducing disulfide bonds enhances acoustic energy dissipation within the coating. Consequently, this coating exhibits exceptional corrosion resistance and noise reduction performance, presenting significant potential for applications in marine equipment's noise reduction and corrosion prevention.
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ACS Nano
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2024
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IF 15.8
Chenyang Cai,Yi Chen,Fulin Cheng,Zechang Wei,Wenbin Zhou,Yu Fu
Harvesting atmospheric water and converting it into electricity play vital roles in advancing next-generation energy conversion systems. However, the current water harvester systems suffer from a weak water capture ability and poor recyclability due to high diffusion barriers and low sorption kinetics, which significantly limit their practical application. Herein, we drew inspiration from the natural “Pump effect” observed in wood and successfully developed a dual “absorption–adsorption” networked MXene aerogel atmospheric water harvester (MAWH) through ice templating and confining LiCl processes, thereby serving multiple purposes of clean water production, passive dehumidification, and power generation. The MAWH benefits from the dual H-bond network of MXene and cellulose nanocrystals (absorption network) and the hygroscopic properties of lithium chloride (adsorption network). Furthermore, its aligned wood-like channel structure efficiently eliminates water nucleation near the 3D network, resulting in fast moisture absorption. The developed MAWH demonstrates a high moisture absorption ability of 3.12 g g–1 at 90% relative humidity (RH), featuring rapid vapor transport rates and durable cyclic performance. When compared with commercial desiccants such as the 4A molecular sieve and silica gel, the MAWH can reduce the RH from 80% to 20% within just 6 h. Most notably, our integrated MAWH-based water harvesting–power generation system achieves a high voltage of ∼0.12 V at 77% RH, showcasing its potential for practical application. These developed MAWHs are considered as high-performance atmospheric water harvesters in the water collection and power generation field.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yanxiang Liu,Yuanlin Li,Yu-Ting Xu,Hai Xu,Yu Gao,Xiao-Feng Wang,Ritsuko Fujii,Shin-ichi Sasaki
Developing efficient heterojunction photocatalysts with improved light-harvesting capacity and high charge carrier separation rates for photocatalytic hydrogen production remains a challenge in the field of energy conversion. In this study, we synthesized two-dimensional Ti 3 C 2 T x nanosheets through HF etching of Ti 3 AlC 2 and combined them with carotenoid dyes ( Car ) with different structural characteristics using a solvent spontaneous volatilization method to construct novel Car @Ti 3 C 2 T x Schottky heterojunctions. The intimate interface contacts between the two-dimensional Ti 3 C 2 T x MXene and Car enhanced the light-harvesting capacity of the photocatalysts and promoted charge separation rates. The optimal sample, Car-3 @Ti 3 C 2 T x nanocomposite, exhibited excellent photocatalytic activity of 84.4 µmol h −1 g −1 for H 2 production under visible light illumination. This work demonstrates the potential of earth-abundant organic Car dyes in constructing high-efficiency and low-cost photocatalysts for hydrogen production .
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Advanced Science
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2024
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IF 14.3
Cuiqin Fang,Jing Han,Qingjun Yang,Zhenguo Gao,Di Tan,Tiandi Chen,Bingang Xu
MXene-based Zn-ion capacitors (ZICs) with adsorption-type and battery-type electrodes demonstrate high energy storage and anti-self-discharge capabilities, potentially being paired with triboelectric nanogenerators (TENGs) to construct self-powered systems. Nevertheless, inadequate interlayer spacing, deficient active sites, and compact self-restacking of MXene flakes pose hurdles for MXene-based ZICs, limiting their applications. Herein, black phosphorus (BP)-Zn-MXene hybrid is formulated for MXene-based ZIC via a two-step molecular engineering strategy of Zn-ion pre-intercalation and BP nanosheet assembly. Zn ions as intercalators induce cross-linking of MXene flakes with expandable interlayer spacing to serve as scaffolds for BP nanosheets, thereby providing sufficient accessible active sites and efficient migration routes for enhanced Zn-ion storage. The density functional theory calculations affirm that zinc adsorption and diffusion kinetics are significantly improved in the hybrid. A wearable ZIC with the hybrid delivers a competitive areal energy of 426.3 µWh cm −2 and ultra-low self-discharge rate of 7.0 mV h −1 , achieving remarkable electrochemical matching with TENGs in terms of low energy loss, matched capacity, and fast Zn-ion storage. The resultant self-powered system efficiently collects and stores energy from human motion to power microelectronics. This work advances the Zn-ion storage of MXene-based ZICs and their synergy with TENG in self-powered systems.
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FUEL
·
2024
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IF 6.7
Jianhao Lao,Yanling Zhu,Fen Xu,Lixian Sun,Songwen Fang,Qiwei Shao,Lumin Liao,Yanxun Guan,Yongjin Zou
Metal-organic frameworks (MOFs), when directly used as electrode materials, encounter issues due to their poor conductivity and low energy density, which restricts their practical application. In this work, the MXene-fibers has been obtained by treating flake Mxene with KOH solution firstly. Then, a novel composite of nanoscale one-dimensional (1D) Mxene-fibers loaded with MOFs-derived metal sulfides (Ni(Co) 3 S 4 @MXene-fibers) has been synthesized. The electrochemical analysis results show that the specific capacitance of Ni(Co) 3 S 4 @MXene-fibers reaches 829.4C g −1 at 1 A g −1 . Moreover, the asymmetric device (Ni(Co) 3 S 4 @MXene-fibers//AC) has an energy density of 63.3 Wh kg −1 at a power densi ty of 850 W kg −1 . This thanks for the 1D MXene-fibers. SEM and other characterization demonstrate that the 1D MXene-fibers can not only avoid the accumulation of Ni(Co) 3 S 4 , but also construct a stable structure with fast charge transfer ability. Besides, it is more conducive to the redox reaction of active substances loaded on its surface, which improves the electrochemical performance.
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SURFACE & COATINGS TECHNOLOGY
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2024
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IF 5.3
Han Yan,Leifeng Shi,Guanzhang Liu,Lin Zhang
Excellent wear resistance is essential for coatings with anti-corrosion and self-warning functions. However, current smart coatings often fail through external friction damage. Adjusting the micro-nano structure of fillers is beneficial to the realization of synergistic effects. Here, mesoporous silica nanocontainers are in-situ loaded on MXene sheets (MSN-load-MX), and then incorporated into an epoxy coating (MSN-load-MX@EP). The experimental approaches include corrosion electrochemical testing, scratch testing, reciprocating sliding friction test, and molecular dynamics (MD) simulation, providing a comprehensive assessment of the protection performance. Based on the experimental analysis and MD results, MSN-load-MX can enhance the interaction strength between resin molecular chains, and perfect the coating structure, thus showing the effective defect warning and physical barrier effects. After 4 weeks of immersion, the |Z| 0.01Hz value of MSN-load-MX@EP is two orders of magnitude higher than Pure EP and 66.81 % higher than MSN/MX@EP, indicating good corrosion resistance. Besides, MSN-load-MX@EP exhibits a stable friction coefficient that is lower than those of Pure EP and MSN/MX@EP, and its wear rate is decreased by 41.59 %. MXene-based lubrication film can be smoothly generated on the friction interface and isolates the direct contact between the two friction pairs, leading to the decrease in the friction intensity and shear stress. Finally, MSN-load-MX@EP not only maintains good corrosion protection performance, but also shows excellent anti-friction and wear resistance. This work advances the wear resistance of the smart anti-corrosive coating and expands the potential applications of MXene/mesoporous silica composite epoxy coating in harsh environments.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Yinan Li,Liulian Huang,Zhibin He,Jianguo Li,Chenglong Fu,Qinghong Zheng,Lihui Chen,Yonghao Ni
Solar-driven evaporators have emerged as a sustainable strategy for water purification and energy harvesting. Designing advanced systems that achieve high evaporation performance, long-term operational stability, and resistance to salt crystallization remains a significant challenge. In this study, an innovative Janus membrane is proposed that addresses these challenges, featuring a super hydrophilic cellulose nanofiber (CNF)@Hexadecyl Trimethyl Ammonium Bromide (CTAB)-MXene layer and a superhydrophobic polytetrafluoroethylene (PTFE) layer. CTAB modification of MXene enhances its interlayer spacing and specific surface area, enabling rapid water transport and efficient solar energy absorption of the CNF@CTAB-MXene layer. A PTFE layer is sputter-deposited onto CNF@CTAB-MXene layer, effectively preventing salt accumulation and membrane fouling, with plasma pre-treatment ensuring excellent interfacial bonding between these two layers. Under 1 sun illumination, the CNF@CTAB-MXene/PTFE Janus evaporator achieves a remarkable evaporation rate of 1.51 kg m −2 h −1 with outstanding salt resistance. The synergy between superhydrophilic and superhydrophobic layers facilitates efficient water transport while maintaining long-term stability without performance degradation. Additionally, the evaporator generates a voltage of 343.8 mV during thermoelectric power generation, and its unique design allows electricity generation from wind energy at night. This integrated system provides an advanced and durable solution for water-power co-generation, offering practical benefits for off-grid or remote regions.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Liming Yao,Liwei Qian,Wenqi Song,Sufeng Zhang,Yuhao Zhang,Lijing Zhang,Xikuan Li,Guangqi Yan,Valentin Nica
Two-dimensional (2D) transition metal carbides (Ti3C2Tx MXene) have demonstrated substantial application potential across various fields, owing to their excellent metallic conductivity and solution processability. However, the rapid oxidation of Ti3C2Tx in aqueous environments, leading to a loss of stability within mere days, poses a significant obstacle for its practical applications. Herein, we introduce an antioxidant strategy that combines free radical scavenging with surface passivation, culminating in the design and synthesis of imidazolium-based ionic liquids (ILs) incorporating siloxane groups. By deploying a straightforward hydrolysis-addition reaction, we successfully fabricated IL-modified Ti3C2Tx materials (Ti3C2Tx-IL). The Ti3C2Tx -IL not only displayed exceptional conductivity exceeding 3.85 × 104 S/m and hydrophilic contact angles below 45° but also showcased its superior chemical stability and antioxidation mechanisms through various analyses, including visual color change experiments, spectroscopic and energy spectrum characterization, free radical scavenging tests, and density-functional-theory-based molecular simulations. Furthermore, when utilized as a conductive filler in the fabrication of a poly(vinyl alcohol)/nanocellulose fiber (PVA/CNF) composite hydrogel (PCMIL), the resultant sensors exhibited remarkable mechanical performance with up to 535% strain, 1.59 MPa strength, 4.35 MJ/m3 toughness, and a conductivity of 3.40 mS/cm, as well as a high sensitivity gauge factor of 3.3. Importantly, even after 45 days of storage, the PCMIL retained most of its functionalities, demonstrating superior performance in human-machine interaction applications compared to hydrogels made from unmodified Ti3C2Tx. This research establishes a robust antioxidant protection strategy for Ti3C2Tx, offering substantial technical reinforcement for its prospective applications in the realm of flexible electronics and sensing technologies.
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Surfaces and Interfaces
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2025
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IF 6.3
Ze-Long Bao,Wen-Hao Geng,Song-Yi Zhang,Peng-Fei Qian,Li-Chao Jing,Xuan-Chen Liu,Tong-Yu Li,Yu-Long Guo,Ru-Yu Chang,Hong-Zhang Geng
Ubiquitous electromagnetic waves have a negative effect on precision instruments and damage human health. Therefore, multifunctional and versatile flexible transparent conductive films, which can solve the challenge of microelectronic device encapsulated and protected in harsh conditions (e.g., extreme temperature) in specific scenarios, are demanded to process electromagnetic shielding and electric heating properties. Herein, AgNWs/MXene@Ni/PET films were fabricated by MXene template-guided electrochemical deposition of nickel nanosphere as flexible transparent conductive films. The films exhibit excellent optoelectrical properties (9.8 Ω/sq @ transparency 80.3%), splendid EMI shielding performances (35.1 dB), outstanding electric heating performance (85°C at 4 V), and rapid heating capability (reaching the saturation temperature with 40 s), which are potential to be widely applied under the complex surrounding as electromagnetic shielding and electric heating. Noticeably, nickel nanosphere are regarded as resistor-capacitor circuit model on the surface of MXene, forming the structure of the capacitor. Furthermore, magnetic nickel nanospheres have synergistic effect with dielectric MXene and AgNWs, defined Dielectric-Magnetic-Dielectric synergistic absorption. In addition, Ni nanosphere generate dielectric dipole interactions with MXene, to enhance the capability of absorbing EMW. Finally, this work has the potential to be conducive to practical and commercial applications as flexible transparent electromagnetic interference and electric heating devices.
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Nano Research
·
2024
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IF 9.5
Wang Yi,Xue Guanfeng,Luo Zhiling,Zhang Wei,Chen Luzhuo
Integrating energy-storage devices (supercapacitors) and shape-deformation devices (actuators) advances the miniaturization and multifunctional development of soft robots. However, soft robots necessitate supercapacitors with high energy-storage performance and actuators with excellent actuation capability. Here, inspired by ant nests, we present a porous structure fabricated by MXene-graphene-methylcellulose (M-GMC) composite, which overcomes the self-stacking of MXene nanosheets and offers a larger specific surface area. The porous structure provides more channels and active sites for electrolyte ions, resulting in high energy storage performance. The areal capacitance of the M-GMC electrode reaches up to 787.9 mF·cm −2 , significantly superior to that of the pristine MXene electrode (449.1 mF·cm −2 ). Moreover, the M-GMC/polyethylene bilayer composites with energy storage and multi-responsive actuation functions are developed. The M-GMC is used as the electrode and the polyethylene is used as the encapsulation layer of the quasi-solid-state supercapacitor. Meanwhile, the actuators fabricated by the bilayer composites can be driven by light or low voltage (≤ 9 V). The maximum bending curvature is up to 5.11 cm −1 . Finally, a smart gripper and a fully encapsulated smart integrated circuit based on the M-GMC/polyethylene are designed. The smart gripper enables programmable control with multi-stage deformations. The applications realize the intelligence and miniaturization of soft robots. The ant-nest-inspired M-GMC composites would provide a promising development strategy for soft robots and smart integrated devices.
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