ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Dan Zhou,Mengmeng Liang,Xingyue Bao,Tiezhu Sun,Yi Huang
Soil colloid is a nonnegligible factor when evaluating the environmental risk of engineered nanoparticles (ENPs) in the groundwater. In this study, the environmental fate of an emerging ENP (Ti 3 C 2 T x MXene) in the groundwater was investigated for the first time, which currently poses a severe environmental risk due to its cytotoxicity but has received little attention. The colloidal dispersion stability and degradation kinetics of Ti 3 C 2 T x MXene in the groundwater were evaluated by considering the effects of soil colloids prepared from sodium humate (SH), montmorillonite (MT), and a natural soil (NS) under variable solution chemistry. The results showed that the affinity of soil colloids with Ti 3 C 2 T x followed an SH > MT > NS sequence. Increasing SH concentration led to Ti 3 C 2 T x disaggregation by enhancing the electrical and steric repulsive forces, while MT and NS resulted in hetero-aggregation because of the elevated collision frequency. SH and MT enhanced the critical coagulation concentrations of Ti 3 C 2 T x by 100 and 10 folders, respectively, via surface coating process, while NS slightly reduced due to the bridging effects induced by the soluble cations. The soil colloids promoted Ti 3 C 2 T x degradation compared with their absence and in an SH > MT ≫ NS sequence. SH and MT were through forming Ti–O–C and Si–O–Ti bonds with Ti 3 C 2 T x via their carboxyl and hydroxyl groups, respectively, rendering the Ti 3 C 2 T x surface more reactive and faster degradation. NS showed a weak promotion effect because of its less affinity with Ti 3 C 2 T x and limited organic matter and clay contents with hydroxyl and carboxyl groups . This study demonstrated the unstable environmental behaviors of Ti 3 C 2 T x in the groundwater and mitigated its environmental risk concerns.
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PubMed
高影响因子
ACS Nano
·
2021
·
IF 15.881
Yunyi Zhu,Ji Liu,Tong Guo,Jing Jing Wang,Xiuzhi Tang,Valeria Nicolosi
The fast development of terahertz technologies demands high-performance electromagnetic interference (EMI) shielding materials to create safe electromagnetic environments. Despite tremendous breakthroughs in achieving superb shielding efficiency (SE), conventional shielding materials have high reflectivity and cannot be re-edited or recycled once formed, resulting in detrimental secondary electromagnetic pollution and poor adaptability. Herein, a hydrogel-type shielding material incorporating MXene and poly(acrylic acid) is fabricated through a biomineralization-inspired assembly route. The composite hydrogel exhibits excellent stretchability and recyclability, favorable shape adaptability and adhesiveness, and fast self-healing capability, demonstrating great application flexibility and reliability. More interestingly, the shielding performance of the hydrogel shows absorption-dominated feature due to the combination of the porous structure, moderate conductivity, and internal water-rich environment. High EMI SE of 45.3 dB and broad effective absorption bandwidth (0.2–2.0 THz) with excellent refection loss of 23.2 dB can be simultaneously achieved in an extremely thin hydrogel (0.13 mm). Furthermore, such hydrogel demonstrates sensitive deformation responses and can be used as an on-skin sensor. This work provides not only an alternative strategy for designing next-generation EMI shielding material but also a highly efficient and convenient method for fabricating MXene composite on macroscopic scales.
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DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Junzhi Li,Yanan Li,Haiyu Luo,Lili Tang,Nan Xu,Wenlan Ji,Shihao Zhang,Pei Nian,Yibin Wei
MXene-based membranes have emerged as promising candidates for seawater desalination due to their unique two-dimensional (2D) lamellar structures, excellent hydrophilicity, and tunable interlayer spacing. However, challenges such as poor salt rejection, and structural instability hinder their broader application. Herein, we present novel Ti 3 C 2 T x MXene membranes owing cyclodextrin (CD)-embedded polyester network between their interlayers through trimesoyl chloride (TMC)-induced interfacial crosslinking, which not only promotes the formation of stable cross-links between the layers of the MXene nanosheets but also enhances their desalination performance. Various characterization methods were used to demonstrate the successful preparation of the Ti 3 C 2 T x MXene-based membranes cross-linked with the specific polyester networks. Using the same dosage of CDs, the membranes modified with α-CD, β-CD and γ-CD were comparatively investigated. The membrane embedded with 5 mg of α-CD exhibited the optimal desalination performance with rejection of 93.96 %, 93.00 %, 85.88 % and 76.25 % for MgSO 4 , Na 2 SO 4 , MgCl 2 , and NaCl, respectively, and water permeabilities ranging from 93.00 to 149.06 L·m −2 ·h −1 ·bar −1 . Moreover, the Na + and Mg 2+ transport mechanisms within the prepared membrane nano-channels were further investigated by molecular dynamics (MD) simulations. This work offers an innovative approach by introducing CD/TMC interfacial crosslinking to 2D lamellar-structured membranes, providing a high-performance solution for desalination.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yushun Zhao,Cheng Yan,Tianqi Hou,Hongli Dou,Hao Shen
Although advances in industrial products have brought convenience to our lives, severe weather has increased the safety risks to industrial facilities. Considerable efforts have been made to develop high-performance superhydrophobic anti-icing coatings. Nevertheless, designing a functional coating with both anti-icing properties and self-deicing remains a major challenge. Here, we propose a design strategy to exploit a photothermal superhydrophobic multifunctional coating with excellent anti-icing and deicing properties based on MXene by high-temperature sintering and layer-by-layer coating. Specifically, poly(tetrafluoroethylene) (PTFE) particles provide low surface energy and binding effects. Room-temperature-vulcanized silicone rubber (RTV) enhances the dispersion of the composite particles and the adhesion of the functional coating to a glass substrate. Furthermore, the functional coatings constructed with MXene exhibit outstanding photothermal effects, imparting excellent superhydrophobicity (CA = 160.18°, SA = 1.8°) and efficient photothermal conversion (equilibrium temperature of 109.3 °C). An anti-icing/deicing test is simulated to confirm their efficient anti-icing/deicing performance in practical applications. Overall, the functional coatings designed in this work can be applied in real industrial facilities.
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DOI
高影响因子
Advanced Materials Technologies
·
2021
·Vol. 7
·期 6
·2101096
·
IF 7.848
Jing-Qi Wang,Peng-Fei Qian,Tian-Jiao Lou,Wenyi Wang,Wen-Hao Geng,Li-Chao Jing,Ze-Long Bao,Tao Wang,Hong-Zhang Geng
The rapid development of the Internet of Things has promoted the application of wearable devices in human's daily life and industrialization. Strain sensors play an indispensable role as a member of wearable devices. Here, a strain film sensor with multi-walled carbon nanotubes (MWCNTs) and Ti 3 C 2 T X MXene, which is obtained by vacuum-assisted filtration and integrated onto a thermoplastic polyurethane substrate, is developed. Since the MWCNTs and Ti 3 C 2 T X MXene composite sensor has a characteristic ‘mud-brick’ microstructure. The sensor has the ability to detect various human movements, such as, bending of finger joints, wrists, elbow joints, and shoulder. The sensors show excellent mechanical property and can be folded more than 2000 times without failure. It also exhibits short response time, low detection limit, and wide range of use. In addition, the sensor shows excellent electrical heating performance. The temperature of the composite film can rise to 96.6 °C in a short period of time even under low voltage power supply (25 V). It likewise proves its excellent performance in terms of cyclability and long-time heating capability. The film has low production cost, easy preparation method, and simple operation. The MWCNT/Ti 3 C 2 T X MXene film can be integrated into wearable devices and shows great potential for future applications.
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高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Yuxuan Zhang,Jun Luo,Xiuyan Wang,Dunhan Zhang,Hongxia Xu,Yuanyuan Sun,Xueyuan Gu,Xin Hu,Bin Gao,Hongqiang Ren
MXenes, such as Ti 3 C 2 T x , demonstrate tremendous potential as heavy metal adsorbents due to their abundant reaction sites, high hydrophilicity , controllable interlayer spacing, and inherent reduction ability. However, their structural dependent pollutant removal performances and the related mechanisms are far less studied. Therefore, the removing abilities of Cr(VI) from water on Ti 3 C 2 T x MXenes with different structures (multilayer (ML-) and delaminated (DL-) Ti 3 C 2 T x ) synthesized via several etching techniques were evaluated. Focusing on the most effective ML- and DL-Ti 3 C 2 T x obtained by acid/fluoride salt etching, the impacts of structural variations on the Cr(VI) removal performances were explored. Both ML- and DL-Ti 3 C 2 T x demonstrate outstanding Cr(VI) adsorption and reduction capabilities, achieving equilibrium within 500 min with capacities of 92.7 and 205 mg/g, respectively. The differences in removal mechanisms stemed from the varying adsorption and reduction capacities of two MXenes. ML-Ti 3 C 2 T x , with lower surface area and porosity, had low adsorption capacity but superior reduction ability, efficiently converting most Cr(VI) to Cr(III) (66.8%). Conversely, DL-Ti 3 C 2 T x exhibited better removal efficiency but a lower capacity for reduction (45.7%). Notably, although the partial reduction of DL-Ti 3 C 2 T x to TiO 2 results in its limited chemical reduction capacity, Ti 3 C 2 T x might serve as a co-catalyst for TiO 2 , boosting the photoresponsiveness of DL-Ti 3 C 2 T x or TiO 2 through Ti 3 C 2 T x /TiO 2 heterojunctions , thereby facilitating photocatalysis to realize the reduction of Cr(VI). Both Ti 3 C 2 T x exhibited both excellent Cr(VI) removal capacity and detoxification capacity, demonstrating their high potential in treating heavy metal pollutants in wastewater.
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高影响因子
CARBON
·
2024
·
IF 10.5
Junyu Lu,Lei Xu,Cheng Xie,Qun Wei,Qilin Jiang,Guangsheng Yao,Zhaohui Han
The rapid development of modern wireless communication technology makes electromagnetic wave pollution increasingly serious, necessitating the development of high-performance electromagnetic wave-absorbing materials. This study introduces a Ti 3 C 2 T x MXene hybrid carbon foam (HCF) that exhibits a tunable and efficient electromagnetic wave absorption performance. The HCF features a porous, multilayered structure, which enhances its multi-reflection properties, and a heterogeneous interface between the carbon foam and MXene boosting its dielectric loss. By regulating the content of MXene, the ratio of polarization loss to conduction loss can be regulated to achieve better impedance matching. As a result, the HCF demonstrated superb electromagnetic wave absorption performance with RL min = −72.25 dB and EAB max = 6.55 GHz. Furthermore, the minimum absorption frequency domain could be tuned within 8–14 GHz by varying the MXene content. The performance in radar wave absorption and electromagnetic-thermal conversion (ramp rate 85.81 °C/s from RT to 200 °C) proves that HCF is an efficient and reliable electromagnetic wave absorber, suitable for radar technology, microwave heating, and communication systems applications.
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高影响因子
ACS Nano
·
2020
·
IF 14.588
Zehui Lin,Ji Liu,Wei Peng,Yunyi Zhu,Yang Zhao,Kang Jiang,Ming Peng,Yongwen Tan
Terahertz technology promises broad applications, which calls for terahertz electromagnetic interference (EMI) shielding materials to alleviate radiation pollution. 2D transition metal carbides and/or nitrides (MXenes) with metallic conductivity are promising for EMI shielding, but simultaneously realizing light weight, high stability, and foldability in a MXene shielding material to meet the requirements of increasingly popular portable and wearable equipment has remained a great challenge. Herein, an ion-diffusion-induced gelation method is demonstrated to synthesize free-standing, light-weight, foldable, and highly stable MXene foams, in which MXene sheets are cross-linked by multivalent metal ions and graphene oxide to form an oriented porous structure. The method is highly efficient, controllable, and versatile for scalable generation of functional 3D MXene structures with arbitrary shapes and synergistic properties. The distinctive cross-linked porous structure endows the light-weight MXene foam with good foldability, outstanding durability and stability in wet environments, and an excellent terahertz shielding effectiveness of 51 dB at a small thickness of 85 μm. This work not only provides an insight for the on-target design of high-performance terahertz shielding materials but also expands the applications of MXenes in 3D macroscopic form.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Yongcheng He,Jingyi Liu,Han Chen,Yutong Yuan,Yuanliang Huang,Jun Jiang,Weichao Li,Liang Lin,Hongyan Yuan,Longhao Zou,Jian Jiao
Low-voltage operation below 500 V enabled by synergistic material-structural design. • Integrated MXene/PDMS composite achieves high dielectric constant, and folded multilayer structure for amplifies deformation. • The haptic actuator delivers 102 μm displacement and 103 mN force without pre-stretching. • Haptic array enables precise tactile pattern generation with 97.71% Braille recognition accuracy. • Wearable, flexible design with wireless control enables immersive VR texture simulation. Haptic feedback is crucial for immersive virtual and augmented reality, relying on soft actuators for natural and comfortable human-machine interaction. Dielectric elastomer actuators are promising for haptic feedback applications, owing to their advantageous properties including lightness, flexibility, and high power density. However, their low dielectric constant frequently necessitates the application of high operating voltages, thus making them prone to dielectric breakdown. Here, we propose a Ti₃C₂Tₓ MXene-based multilayer-folded dielectric elastomer haptic actuator operating at a low voltage enabled by an integrated materials and device design strategy. The haptic actuators feature a dielectric film with a high dielectric constant (above 6.39 at 1 kHz) achieved by incorporating Ti₃C₂Tₓ MXene into polydimethylsiloxane (PDMS), combined with a uniquely folded multilayer structure that accumulates deformation. The haptic actuator can deliver an out-of-plane displacement of 102 μm and a force of 103 mN without pre-stretching. A haptic display interface incorporating these actuators enables independent actuation that operates at a low voltage below 500 V. It supports various tactile patterns, such as Braille and texture simulation in virtual reality, offering a viable pathway toward immersive human-machine interactions. Download: Download high-res image (248KB) Download: Download full-size image
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高影响因子
Materials Today Physics
·
2026
·
IF 9.3
Kexun Li,Fangyu Shi,Yanxia Wu,Min Zhao,Ying Liu
Modulating the electromagnetic properties of Ti 3 C 2 T x MXene to produce an ideal multifunctional and efficient microwave absorbent is a challenging research hotspot. Although the atomic layer deposited transition magnetic metal nanostructures are a feasible strategy, the effects of the components and microstructure of the introduced magnetic nanostructure on the electromagnetic wave absorption performances of the MXene are still far from clear. Here, the Fe element has been selected as the modifier, and a heterostructure Fe/Ti 3 C 2 T x MXene hybrid is constructed by the atomic layer deposition of Fe nanoparticles on the Ti 3 C 2 T x nanosheets. The influences of the deposition cycles on the chemical composition, microstructure, electromagnetic response characteristics, and microwave absorption properties are investigated. The results show that the decoration of Fe nanoparticles enables a tunable electromagnetic performance. The Fe/Ti 3 C 2 T x MXene hybrid achieves an optimal attenuation with the minimum reflection loss of -82.94 dB at a small thickness of 1.16 mm, corresponding with an effective absorption bandwidth of 3.76 GHz. The strong microwave absorption is attributed to the dielectric-magnetic synergy in the MXene and Fe nanoparticles, which provides excellent impedance matching, interfacial and dipolar polarization loss, and magnetic resonance loss. Specifically, the hybrid endows a low Fe content of 2.66 wt%. This is important for the design of a lightweight absorber with high attenuation efficiency.
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高影响因子
CARBON
·
2022
·
IF 11.307
Yujie Ning,Donghui Jian,Siqi Liu,Fanwei Chen,Yihan Song,Siyi Li,Bin Liu
Two-dimensional titanium carbide (Ti 3 C 2 T x ) MXene has many distinctive advantages, including high conductivity, energy-storing, catalysis, etc. In particular, its accordion-like lamellar structure could provide excellent barrier properties to corrosive agents, which exhibit potential application value for anti-corrosion coatings. However, the problem that MXenes are susceptible to oxidative degradation in an aggressive environment limits its further application in the field of corrosion prevention. Herein, in our work for the first time, an effective method was developed for protecting sensitive Ti 3 C 2 T x MXene against oxidation by imidazolium salt modification (I-Ti 3 C 2 T x ), which considerably increased MXene antioxidant stability. The crystalline structure of I-Ti 3 C 2 T x remained unaltered in an aqueous solution for 30 days and kept the lamellar structure for a long period. Simultaneously, 1.0 wt% I-Ti 3 C 2 T x /EP could provide excellent anti-corrosion protection. A new synergistic mechanism for improving antioxidant stability and anti-corrosion property of I-Ti 3 C 2 T x /EP coatings was developed and clarified based on the free radical scavenging ability of imidazolium ions and the chemical characteristics of MXene.
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DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Shuya Lu,Yunsi Wang,Yongcheng Li,Guanshun Xie,Hongling Ge,Zerongruo Sun,Peng Zhang,Benhua Xu,Bingxin Liu
Two-dimensional Ti 3 C 2 T x MXene exhibits promising application prospects in the field of resistive random-access memory (RRAM) owing to its unique layered structure, abundant surface functional groups, and tunable band structure. However, the modulation of its electronic structure is critical for promoting the application of Ti 3 C 2 T x MXene in such semiconductor devices. Herein, chitosan (CS) was incorporated with Ti 3 C 2 T x MXene to construct CS-MXene composite films, which were subsequently employed as the resistive layer in the RRAM devices. The conductivity of Ti 3 C 2 T x MXene can be switched from a metallic-like state to a semiconducting state, and the resistive switching behaviors of CS-MXene hybrid films could be regulated by adjusting the mass ratio of Ti 3 C 2 T x MXene to CS. When the mass ratio of two components was 0.5, the as-fabricated Al/CS-MXene/ITO/glass device exhibited the most outstanding resistive switching (RS) performance, characterized by a lower operating voltage, a higher on/off ratio, excellent retention, and reliable endurance. Mechanistic analysis revealed that the RS behavior originates from the electron trapping/detrapping dynamics within the CS-MXene resistive layer. This work demonstrates high-performance RRAM devices based on CS-MXene composites, offering a feasible strategy for modulating the electronic structure of two-dimensional Ti 3 C 2 T x MXene. Chitosan (CS) was incorporated with Ti 3 C 2 T x MXene to construct CS-MXene composite films, which were subsequently employed as the resistive layer in the RRAM devices. The conductivity of Ti 3 C 2 T x MXene can be switched from a metallic-like state to a semiconducting state, and the resistive switching behaviors of CS-MXene hybrid films could be regulated by adjusting the mass ratio of Ti 3 C 2 T x MXene to CS. When the mass ratio of two components was 0.5, the as-fabricated Al/CS-MXene/ITO/glass device exhibited the most outstanding resistive switching (RS) performance, characterized by a lower operating voltage, a higher on/off ratio, excellent retention, and reliable endurance. Mechanistic analysis revealed that the RS behavior originates from the electron trapping/detrapping dynamics within the CS-MXene resistive layer. Download: Download high-res image (133KB) Download: Download full-size image
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高影响因子
危险品化学品经营许可证（带存储）