ACS Applied Nano Materials
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2023
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IF 5.9
Qingtao Li,Yu Sun,Bing Zhou,Gaojie Han,Yuezhan Feng,Chuntai Liu,Changyu Shen
The development of multifunctional electromagnetic interference (EMI) shielding films with optical transparency is highly urgent as visual windows in modern optoelectronic devices. Herein, Ti3C2Tx nanosheet (MXene)-based transparent conductive films (TCFs) with thermoplastic polyurethane (TPU) as substrates were prepared by simple spraying, which was further applied in high-performance EMI shielding, Joule heating, and photothermal conversion. The comprehensive properties of the transparent MXene/TPU films can be optimized by adjusting the thickness of the MXene layer. The optimal TCF showed a sheet resistance of 119.1 Ω/sq, a transmittance of 43.1%, and an average EMI shielding effectiveness of 10.9 dB. Meanwhile, this TCF exhibited a stable EMI shielding performance to resist bending and stretching. Moreover, the multifunctional MXene/TPU film presented remarkable thermal management performances, including Joule heating (89.4 °C @ 7 V) and photothermal conversion (72 °C @ 100 mW/cm2) abilities. This work presents flexible and stretchable MXene-based TCFs with satisfactory EMI shielding performance and multisource thermal response behavior, which is promising for various transparent and flexible electronic devices.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 3
·1026-1043
·
IF 4.5
Chen Sen,Shi Qianru,Liu Hui
As a typical two-dimensional MXene material with abundant oxygen-containing functional groups, Ti 3 C 2 could be used as an excellent carrier for noble metal nanoparticles to effectively avoid its agglomeration. However, Ti 3 C 2 was easily oxidized and deteriorated when stored in a conventional environment, so polydopamine (PDA) was used to modify Ti 3 C 2 to promote uniform loading of noble metal nanoparticles. Based on this, with Ti 3 AlC 2 as the raw material and PDA as the modifier, in situ growth of gold nanoparticles was carried out using chloroauric acid trihydrate as the precursor, and the target nanocomposite catalyst (Au@P-Ti 3 C 2 ) was then obtained. A sequence of characterizations were employed to analyze chemical structure of the resulting catalyst. The catalytic degradation performances of Au@P-Ti 3 C 2 toward amaranth, methylene blue, chrome black T, and Congo red were systematically investigated, and the results showed that catalytic degradation percentage of Au@P-Ti 3 C 2 for the above dyes could reach 100%. The pseudo-first-order kinetic model could be used to simulate the catalytic reaction process well, and catalytic reaction rate constants of Au@P-Ti 3 C 2 (2) for the four pollutants were 0.0411 s −1 , 0.0721 s −1 , 0.0273 s −1 , and 0.0105 s −1 , respectively. After 10 cycles of repeated catalysis, catalytic degradation percentage of the composite catalyst toward the four dyes could still remain above 89%. Therefore, this novel, green, and simple method to synthesize Ti 3 C 2 -based composite catalyst might provide extremely valuable application prospect for MXene-based catalyst in the field of harmless treatment of industrial dyes. Graphical Abstract
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liming Liu,Zhurui Shen,Can Wang
In this study, two kinds of 2D materials (nanoscale mono/multi-layer MXene) were prepared, and a new visible-light-driven photocatalyst MXene@In 2 S 3 was synthesized by one-step hydrothermal preparation. Due to the better conductivity and larger specific surface area of the monolayer MXene, monolayer MXene@In 2 S 3 exhibited greater transient response photocurrent and smaller interfacial charge transfer resistance than those of multilayer MXene@In 2 S 3 under visible light irradiation. All these indicated that the synergistic effect of type-II heterojunction and TiO 2 /Ti 3 C 2 T x interface provided a shorter and more direct channel for electron transfer between In 2 S 3 , TiO 2 and MXene. When bioaerosol was sterilized by dynamic continuous flow photocatalytic reactor carrying monolayer MXene@In 2 S 3 , it can reach 1.55 lg in 9.6 s (multilayer MXene@In 2 S 3 was 1.19 lg). Biological particles of different particle sizes were effectively removed from the bioaerosol. The excellent photocatalytic disinfection performance was due to the oxidation substances (holes, ·O 2 – and ·OH) produced by the photocatalyst under visible light irradiation. Microbial cell membrane permeability was disrupted, causing irreversible physical damage that will ultimately lead to sustained inactivation within 16 h. Due to the unique physical and chemical properties of the two-dimensional material MXene, it has scope for further exploration in the field of disinfection and air purification.
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SYNTHETIC METALS
·
2022
·
IF 4
Yanhua Lei,Mengchao Ding,Haikun Wu,Di Yin,Yang Li,Bochen Jiang,Kai Sun,Yuliang Zhang,Hailiang Du
In this work, the layered Ti 3 C 2 T x MXene were coated with polypyrrole particles by an in-situ polymerization method, and their electromagnetic wave absorption performance were systematically studied. The MXene/PPy composites presented an excellent electromagnetic wave absorption performance, the strongest reflection loss can reach − 68 dB at 2.68 mm. Meanwhile, when the thickness is 2.26 mm, the effective absorption bandwidth can reach 6.56 GHz (from 11.44 to 18 GHz), covering the entire K u band (12–18 GHz). The multiple reflections at the heterogeneous interface, and the synergistic effect between the layered MXene and the conductive polypyrrole network made a combined effect on the optimized absorption. The MXene/PPy composites with a strong electromagnetic wave absorption, wide effective absorption bandwidth and corrosion resistance have a great value in aircraft and vessel fields.
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CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Guangzhen Cui,Xin Zheng,Xuliang Lv,Qi Jia,Wei Xie,Guangxin Gu
MXene materials with efficient electromagnetic (EM) microwave absorber applications are in high demand. Herein, the EM wave absorption properties of two-dimensional MXene Ti 3 C 2 T x , fabricated by etching the Ti 3 AlC 2 phase with an enchant of HCl and LiF, was thoroughly investigated over a frequency range of 2–18 GHz. In addition, the impact of three critical factors (reactant concentration, reaction time, and reaction temperature) on the morphology control and dielectric properties was discussed. With increasing degree of exfoliation, the multilayer structure of Ti 3 C 2 T x changed gradually, thereby further influencing the microwave absorption properties. Among the etched samples, Ti 3 C 2 T x prepared with 9 M HCl at 35 °C for 24 h exhibited an excellent reflection loss of −40.8 dB at 13.9 GHz with a thickness of 1.45 mm, while also possessed the broadest effective bandwidth, reaching 3.66 GHz at 1.68 mm. The demonstrated EM wave response mechanism, indicated that the conduction loss and polarization loss contribute significantly to the EM wave absorption performance. These findings endow the Ti 3 C 2 T x material with an effective foundation for the construction of novel EM wave absorbers.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Dekui Song,Xiaofeng Li,Xiao-Peng Li,Xueqin Jia,Peng Min,Zhong-Zhen Yu
Although versatile piezoresistive pressure sensors show a great potential as human motion detection and wearable smart devices, it is still an issue to widen their working range and enhance their sensitivity. Herein, hollow-structured MXene-polydimethylsiloxane composites (MPCs) are fabricated by utilizing nickel foam as the three-dimensional substrate for dip-coating of MXene sheets followed by infiltrating of polydimethylsiloxane and etching of the nickel foam substrate. The resultant MPC performs a wide working range with bending angles of 0° to 180°, an excellent long-term reliability up to 1000 cycles under the bending angles of 15°, 30° and 150°, and a stable durability with a bending angle of 30° in a frequency range from 0.05 to 2 Hz as a bendable piezoresistive pressure sensor, which is attributed to the formation of dense conduction paths due to the interconnection of MXene sheets during the deformation of MPC. The sensor also exhibits an extremely low detection limit of 10 mg for pressure detection. Interestingly, the slippage of adjacent MXene sheets is beneficial for monitoring slight vibration of equipments and detecting subtle human motions. Thus, the MPC sensor could be applied for stereo sound and ultrasonic vibration monitoring , swallowing, facial muscle movement, and various intense motion detections, demonstrating its great potential as wearable smart devices.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 33
·16196-16204
·
IF 9.931
Jianqiu Zhao,Yawei Yang,Chenhui Yang,Yapeng Tian,Yan Han,Jie Liu,Xingtian Yin,Wenxiu Que
Solar steam generation is a renewable, environmentally friendly and low-cost technology for seawater desalination and wastewater remediation. Highly efficient solar evaporation from pure water has been achieved using advanced artificial architectures and hydrophilic light absorption materials, while the long-term steady work for high salinity water desalination becomes a non-negligible problem when it comes to practical use. In terms of this issue, a hydrophobic MXene membrane, which contains a salt-blocking delaminated Ti3C2 nanosheet layer with trimethoxy(1H,1H,2H,2H-perfluorodecyl)silane modification for sunlight harvesting and a piece of commercial filter membrane for water supply, is proposed in this work. With high light utilization, high stability, abundant evaporating channels, rapid water transport through the filter membrane and salt-blocking on the MXene membrane, the as-fabricated self-floatable device achieves a solar evaporation rate of 1.31 kg m−2 h−1 and a solar steam conversion efficiency of 71%, and stability under high salinity conditions under one sun over 200 hours, ensuring the highly efficient and long-term stable photothermal transduction for water purification from seawater and wastewater containing organic dyes and heavy metals. The hydrophobic surface enabled salt-blocking MXene membrane is proved to be an effective, efficient and stable photothermal material for solar desalination.
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WEAR
·
2025
·
IF 6.1
Sudesh Singh,Tianyi Han,Xinchun Chen,Chenhui Zhang
Although MXene and MoS 2 individually possess outstanding anti-friction and wear-resistant properties in numerous applications, the combination of both in the recent past has created a new frontier in cutting-edge applications. The current work insights into the impregnation of porous alumina ceramics in the MXene (1 wt %), MoS 2 (1 wt %), and hybrid (0.5 wt % MXene +0.5 wt % MoS 2 ) solution to fabricate self-lubricating alumina composites via vacuum impregnation method and afterward exploring the mechanical as well as tribological properties of the synthesized composites. A significant strengthening of the matrix for impregnated composites was observed compared to unimpregnated porous ceramics. The impregnated composites were slid against the zirconia ball to assess the friction behavior. The results revealed that the ceramics impregnated with MXene only can reduce COF by ∼43 % of that unimpregnated ceramics; however, in conjunction with MoS 2, the reduction can be lowered to ∼70 % attributed to synergistic effect of MXene and MoS 2 to form the tribo-layer over interacting surfaces. The study concludes that hybrid (MXene/MoS 2 ) impregnation of porous ceramics exhibits excellent self-lubricating properties over other impregnations, making them suitable candidates for advanced tribological applications. This novel combination leverages the unique properties of MXene and MoS 2 to enhance the longevity and performance of porous ceramics in demanding operational environments.
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Advanced Science
·
2024
·
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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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Siyu Liu,Chuanpeng Li,Yuchen Sun,Xuanlin Qiu,Xiaoli Li,Chufeng Sun,Yu Liu,Qiangliang Yu,Bo Yu,Meirong Cai,Feng Zhou,Weimin Liu
MXene has excellent anticorrosion and self-lubricating properties. It is widely used in the field of anticorrosion and wear resistance. However, there is a strong interaction between MXene nanosheets, which makes it easy for them to agglomerate in the coating and affects the mechanical properties of the coating. Thus, the application of MXene is limited. In this study, MXene is modified by 2,5-diaminobenzenesulfonic acid, which can reduce the aggregation of MXene in the coating. MXene is functionalized by using tetrabutylphosphorus hydroxide benzotriazole lignin composite material (BTA-P4444-Lig) with environmental protection, anticorrosion, and lubricating properties. The prepared MXene has excellent anticorrosion and lubrication properties. Functionalized MXene (f-MXene-P) is used as a filler for environmentally friendly waterborne epoxy (WEP) coatings. Electrochemical tests show that the impedance of f-MXene-P/WEP (3.91 × 107 Ω·cm2) is an order of magnitude higher than that of WEP (1.89 × 106 Ω·cm2). The maze effect of MXene and the protective film formed by BTA-P4444-Lig on the surface of Q235 steel synergistically enhance the anticorrosion performance of f-MXene-P/WEP. The friction test results show that the friction coefficient of f-MXene-P/WEP (0.068) is much lower than that of WEP (0.612). The synergistic effect of MXene and BTA-P4444-Lig with lubricating properties improves the wear resistance of f-MXene-P/WEP.
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ACS Nano
·
2024
·
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
·
2024
·
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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