SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Ruyi Yang,Jinniu Zhang,Jia Liu,Gang Li,Yu Qiao,Xinyi Zhang,Jianzhi Gao,Hongbing Lu
The rational design of sensing materials with distinct morphologies and compositions is important to construct outstanding flexible gas sensors. Herein, a mesh polyaniline (PANI)/Ti 3 C 2 T x composite nanofiber-based flexible sensor was constructed by electrospinning of PANI and few-layer Ti 3 C 2 T x nanosheets . Sensing results indicated that this novel PANI/Ti 3 C 2 T x flexible sensor demonstrated much higher NH 3 sensing response (2.3-fold improvement @ 20 ppm) in comparison with the sensor based on pure PANI nanofibers at 25 °C. Under different bending angles (maximum compression of 150°) and different bending times (maximum bending of 3200 times), the PANI/Ti 3 C 2 T x flexible sensor maintained steady sensing behavior towards 20 ppm NH 3 , which reflected its good flexible bending stability. The PANI/Ti 3 C 2 T x flexible sensor also exhibited good selectivity, repeatability, as well as good long-term stability. The improvement of NH 3 sensing properties can be ascribed to the formation of Schottky junctions between PANI and Ti 3 C 2 T x nanosheets, improved protonation degree of PANI, and the special three-dimensional mesh fiber structure. Our work revealed that the PANI/Ti 3 C 2 T x composite nanofibers with interconnected mesh fiber structure have great potential to construct flexible NH 3 sensors.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Yufei Wang,Yue Wang,Gaofei Pan,Jian Huo,Ruiguang Xing,Xin Ge
Owing to the rapid development of information and electronic technologies, it is urgent to design and prepare new materials with electromagnetic interference (SEI) shielding function to reduce electromagnetic pollution. Herein, a thin magnetic Ti 3 C 2 T x MXene (MMX) nanocomposite film with excellent EMI shielding performance was obtained by combining Ti 3 C 2 T x MXene nanosheets with porous magnetic microspheres (PMMs). The lamellar structure of Ti 3 C 2 T x MXene nanosheets provides flexibility to the MMX nanocomposite film, enabling it to bend and deform in a flat plane. Furthermore, PMMs possess magnetic and dielectric properties, enhancing the attenuation ability of the MMX nanocomposite film to electromagnetic wave energy. The rough surface of PMM can improve the electromagnetic wave consumption through multiple reflection and enhance the performance of Ti 3 C 2 T x MXene EMI shielding nanocomposites. MMX nanocomposite exhibits excellent EMI shielding performance (SE T : 66.9 dB, SSEt: 5251 dB cm 2 g −1 ). We anticipate that this flexible nanocomposite film with excellent EMI shielding effect will be widely used in different fields.
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DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Shuai Zhang,Ying Huang,Jiaming Wang,Xiaopeng Han,Guozheng Zhang,Xu Sun
Flexible energy storage systems and electromagnetic pollution have become issues that need to be resolved in equipment research and development due to the widespread use of portable electronic devices and 5G networks . MXene is competent for supercapacitors and electromagnetic wave absorbers through sensible composite and microstructure design. Herein, Cu 1.5 Mn 1.5 O 4 Hollow Nanosphere Decorated Ti 3 C 2 T x MXene (CuMnHS@MX) was prepared by simple electrostatic self-assembly. Hybrid membranes can be quickly prepared by vacuum-assisted filtration. CuMnHS@MX exhibits excellent electromagnetic wave absorption performance and electrochemical energy storage properties. High specific capacitance (2089 mF/cm 2 at 2.5 mA/cm 2 ) and excellent cycle stability (99.89% after 8000 cycles) are achieved, which are attributed to the increased interlayer spacing and improved interlayer ion transport efficiency. When assembled into symmetrical flexible all-solid-state supercapacitor (SC), the device has a specific capacitance of 382.9 mF/cm 2 and an energy density of 53.18 μWh/cm 2 at a power density of 277.8 μW/cm 2 . Meanwhile, CuMnHS@MX has advantageous absorbing properties. When the thickness is 4 mm, the minimum reflection loss (RL min ) is −53.42 dB at 6.08 GHz. Adjustable absorbing property is achieved, and the absorbing energy efficiency can cover X and most C, Ku bands . These excellent EMA properties are derived from the 3D structure and rich dipole/interface polarization. CuMnHS@MX is a promising bifunctional material for electrochemical energy storage and electromagnetic wave absorption.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Linshan Zhang,Guozong Yue,Luming Yang,Deshun Huang
Ultra-thin MXene nanosheets (Nss) were facilely prepared via delaminating and intercalating the multi-layered MXene using tetramethylammonium hydroxide (TMAOH). Electron-rich characteristics, abundant surface active sites and the negative charges made MXene Nss having both good reduction ability and adsorption capacities, which would effectively remove anion Cr(VI) via reduction and remove cation Cr(III) via adsorption. Batch adsorption tests were carried out to study the pH impact, adsorption kinetics and isotherms. Upon adsorption, the well dispersed MXene Nss suspension was aggregated to form flocs and sediment at the bottom. The maximum Cr(VI) and Cr(III) removing capacities are calculated to be 554.9 mg/g at 318 K and 283 mg/g at 298 K, respectively. The mechanisms on Cr(VI)/Cr(III) adsorption were well studied employing SEM, TEM , XPS and FT-IR. In addition, the MXene Nss also showed good adsorption capacity towards other metal cations (such as Cu 2+ , Cd 2+ , and Pb 2+ ), manifesting that the current MXene Nss has the potential to be used as a general-purpose adsorbent.
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高影响因子
SYNTHETIC METALS
·
2022
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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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高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Zhenguo Wang,Ke Yu,Yu Feng,Ruijuan Qi,Jie Ren,Ziqiang Zhu
MXenes, a new class of two-dimensional materials, possessing high electrical conductivity and unique surface properties，have exhibited great potential as non-noble metal catalyst for hydrogen evolution reaction (HER). However, due to poor oxidation resistance , they are easily oxidized in aqueous solution and high humidity environment, resulting in a great loss of electronic properties and surface reactivity. Herein, we report a simple and effective composite synthesis strategy with TiOF 2 intercalation to improve the stability of MXenes materials. TiOF 2 @Ti 3 C 2 T x prepared by this strategy shows ultra-long catalytic activity life of 1000 cycles in acid electrolyte. Besides，the catalyst also shows high HER activity with a low onset potential of 103 mV and a Tafel slope as low as 56.2 mV dec − 1 . Benefiting from the stabilization of TiOF 2 and the physicochemical properties of Ti 3 C 2 T x , TiOF 2 @Ti 3 C 2 T x also exhibits excellent humidity sensitivity and stability.
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高影响因子
CERAMICS INTERNATIONAL
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2019
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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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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Xiaole Zhang,Chanchan Fan,Naiyuan Yao,Peng Zhang,Tao Hong,Chenxi Xu,Jigui Cheng
Anion exchange membranes (AEMs) have been studied to improve conductivity for their high performance. The functional groups with positive charge could construct ion channels, which is the significant factor in determining the anions conductivity through the membrane. This report demonstrates the use of a new 2D nanomaterial as filler used in the quaterized polysulfone (QPSU) matrix for composite membrane performance enhancement of alkaline anion exchange membrane fuel cells (AAEMFCs). Ti 3 C 2 T x is functionalized with quaternary ammonium groups successfully etched by NH 4 HF 2 . The two kinds Ti 3 C 2 T x are synthesized and incorporated into QPSU based membranes by using a solution blending method. The QPSU/NH 4 HF 2 -Ti 3 C 2 T x composite membrane exhibits the hydroxide ionic conductivity nearly 2 times higher than that both of pristine QPSU and QPSU/LiF-Ti 3 C 2 T x membranes among 20–60 °C, and leads to substantial increase in peak power density of AAEMFCs by ~ 30% at 60 °C. The results indicate NH 4 + groups on the MXene surface further enhance the OH - conductivity. Furthermore, the QPSU membranes addition with two kinds Ti 3 C 2 T x both exhibit good mechanical property and thermal stability, and hold promise for application in AAEMFCs.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
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IF 6.1
Tian Zhang,Liangliang Xiong,Zhongpan Zhang,Xiaoqiang Fan
To achieve the desired performance of ultra-low friction and wear, we devised an ingenious solid-grease composite lubrication coating (TXL) that combined parallel-arranged Ti 3 C 2 T x resin coatings (TX) and lithium complex grease (LCG). The TX coating facilitated in-situ supply of Ti 3 C 2 T x and effectively inhibited crack propagation, while the LCG ensured a stable oil film bearing capacity. The Stribeck theory demonstrates that TXL consistently remained in boundary lubrication. At 253.93 MPa for 2 h, pure epoxy (EP) and TX coating failed, while TXL still enhanced anti-friction by 19.57 % and anti-wear by 64.31 % relative to EPL. Combining the dual advantages of Ti 3 C 2 T x that promotes lubrication state change and oil-based films supplied by LCG, TXL demonstrates enormous potential for long-lasting, efficient, and stable lubrication.
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高影响因子
WEAR
·
2025
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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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高影响因子
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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高影响因子
ACS Applied Materials & Interfaces
·
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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PubMed
高影响因子
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