RARE METALS
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2024
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IF 9.6
Wang Wei-Wei,Huang Rui,Tao Yu,He Peng,Tuo Su-Xing,Bian Yu-Jian,Hu Rui-Ting,Yan Jun,Liang Yan-Jie,Zhang Wen-Chao
The electrochemical utilization of Zn anodes in aqueous batteries is hampered by the intricate and interconnected issues of Zn dendrite growth, H 2 evolution and Zn corrosion reactions. In this study, a multifunctional protective layer comprising MXene and graphitic carbon nitride (g-C 3 N 4 ) was constructed using a self-assembly strategy. The MXene/g-C 3 N 4 protective layer exhibited robust zincophilic characteristics, which facilitated a uniform distribution of the electric field and ensured a sufficient influx of Zn 2+ . This reduces the Zn 2+ nucleation barrier and prevents dendrite growth. In addition, the hydrophobic nature of the protective layer, coupled with its negative charge, can repel SO 4 2− and select water molecules from the electrolyte, which aids in mitigating corrosion and H 2 evolution. The symmetric Zn cell coated with the MXene/g-C 3 N 4 protective layer showed remarkable stability, achieving over 2000 h of reversible cycling at 1 mA·cm −2 . Furthermore, the MXene/g-C 3 N 4 -coated Zn anode paired with a sodium-doped V 2 O 5 cathode (NVO) exhibited enhanced cycling capability over 1500 cycles. Graphical Abstract
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-11
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IF 5.3
Zhang Guowei,Zhang Huaju,Fu Yuchun,Xia Ping,Chen Cheng,Wei Yizhan,Qu Shuxin,Feng Shun
With the advancement of nanotechnology, various types of nanomaterials have been integrated into electrochemical immunoelectrodes to enhance their performance. Among these, MXene stands out as a promising candidate due to its high electron transfer capacity and abundant surface chemical groups. However, the improvement in electrode performance is often hindered by the self-restacking and agglomeration of MXene. To address this issue, multi-walled carbon nanotubes (MWCNTs) were selected to form composites with MXene. Subsequently, a label-free immunosensor, BSA/Ab/AuNPs/MXene-MWCNTs-Nafion/ITO, was fabricated for specific detection of carcinoembryonic antigen (CEA), a widely used tumor marker. The results demonstrated that the incorporation of MWCNTs can effectively prevent the self-stacking of MXene. Moreover, the composites enhanced the loading of gold nanoparticles (AuNPs) to connect the antibodies, thereby improving electronic transmission signals and sensitivity. The sensor exhibited excellent analytical performance towards CEA with a wide linear range (0.050 to 200 ng mL −1 ) and a low limit of detection of 0.015 ng mL −1 ( S / N = 3). The possibility of it being applied in clinical trials was verified by using ELISA and differential pulse voltammetry (DPV) assays to detect CEA in serum samples. The recoveries ranged from 95.34 to 102.09% with relative standard deviations (RSDs) below 5.00%. Furthermore, the sensor displayed satisfactory selectivity, repeatability, and stability. We hope the findings highlight promising prospects for advanced immunosensor development and alternative strategies in cancer diagnosis. Graphical Abstract
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Huiqin Fan,Zejun Zhang,Xiaowen Wu,Shujuan Meng,Yong Xu,Di Wang,Fei Zhao,Jianyou Wang
Ion exchange membranes (IEMs) have a wider application in water purification, electrolytic process, and ion separation. The improvement of IEMs performance through sulfonation treatment is limited, which seriously affects their application. Therefore, the incorporation of two-dimensional MXene can serve as a new breakthrough for exploration. However, the size of MXene nanosheets has not received significant attention in the studies of preparing composite membranes. The focus of this work was to explore the effect of MXene nanosheets on IEMs from the perspective of nanosheet size. Specifically, by adjusting the sizes of MXene nanosheets using simple sonication treatment, the continuous ion transport channels were constructed by connecting non-conductive regions in the matrix owing to uniform distribution and abundant hydroxyl functional groups of MXene nanosheets. Afterwards, content regulation was supplemented to increase the distribution density of negatively charged MXene nanosheets in the matrix, thereby further increasing the migration rate of ions. Through this special synergistic regulatory effect, the performance of the composite membrane was maximally improved. Additionally, SPM membrane achieved better IEC and permeability, as well as lower membrane area resistance compared to pristine SPSF membrane. When applied to the ED process, SPM1.0%-1.5h membrane revealed higher desalination performance (90.4 %) and current efficiency (104.2 %) compared to pristine SPSF membrane (86.6 % and 99.7 %, respectively).
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CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Xiaolei Zhang,Fumin Wang,Lin He
In this study, various rigid polyurethanes foams (PUFs) with different morphologies were prepared and subsequently used for encapsulating the phase change material , polyethylene glycol (PEG). To address the low photothermal conversion efficiency of polyurethane-based phase change materials, MXene was successfully synthesized via an in-situ hydrofluoric acid (HF) etching method and incorporated into the PEG to obtain MXene@PEG composite material. Finally, a series of innovative MXene@PEG-PUF phase change composites were successfully fabricated by utilizing PUFs as the supporting matrix and the MXene@PEG composite as the phase change component through a vacuum impregnation technique, and their thermophysical properties and photothermal conversion performance were systematically studied. The results show that PUF is the ideal capsulation material for PEG. And MXene@PEG-PUF demonstrates a high PCM loading rate (>80 wt%) and a high latent heat storage enthalpy (>140 J/g) with a relative enthalpy efficiency of 99.5%, maintaining excellent shape stability and relative enthalpy efficiency of 95.58% after 150 thermal cycles. This highlights its superior thermal reliability, making it suitable for practical building energy-saving applications. Most importantly, the incorporation of MXene into PUF@PEG significantly enhances solar-to-thermal conversion capability, attributed to the exceptional photothermal characteristics of MXene.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yuelin Lu,Jie Bai,Binbin Sun,Nannan Li,Zhenhuai Yang,Hailing Yu,Cong Wang,Cong Gu,Huan Liu,Peng Tang,Qiang Wang
MXene materials exhibit substantial energy storage capabilities owing to their high specific surface areas, tunable interlayer spacings, and excellent electrical conductivities. However, these layers are prone to re-stacking, negatively affecting the energy storage capacity of the material. Herein, through a process involving liquid nitrogen-assisted freeze-drying and subsequent annealing, Ti 3 C 2 T x nanosheets were combined with polyvinyl alcohol (PVA) polymer chains via hydrogen bonding to produce MXene and PVA-derived carbon composite aerogels (MPAs) with microstructures ranging from ordered to disordered arrangements. The incorporation of PVA inhibited nanosheet stacking, and PVA carbonization enhanced the electrical conductivity of the aerogel. The carbonized aerogel (MPA2.0) exhibited a larger specific capacitance along with a more disordered and denser microstructure, thereby accounting for the increased capacitance due to enhanced ion storage in the more structurally disordered carbon nanopores. The optimized MPA aerogel demonstrated a high power density, along with an excellent specific capacitance (MPA2.0 = 348.14 F g −1 , 2 mV s −1 scan rate), and a cycling stability of 92.52 % after 10,000 charge/discharge cycles. Furthermore, the MPA2.0-based supercapacitor obtained an impressive energy density (37.8 Wh kg −1 ) and an exceptionally high power density (1800 W kg −1 ) at a current density of 1 A g −1 . By adjusting the PVA loading, the shrinkage and stress–strain characteristics of the microstructure during freeze-drying and carbonization were altered, and the microstructural orientation of the resulting aerogels was controlled. The increased disorder in the aerogel enhanced its capacitor energy storage ability, providing a new approach for the design of multi-component high-performance hybrid supercapacitor electrodes.
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Tungsten
·
2024
·
IF 5.6
Chen Hao,Wang Ya-Qin,Zhang Dong-Ting,Zhao Bei,Li Min-Peng,Li Chen-Yang,Xu Tian-Peng,Liu Mao-Cheng
MXenes obtained significant attention in the field of energy storage devices due to their characteristic layered structure, modifiable surface functional groups, large electrochemically active surface, and regulable interlayer spacing. Nonetheless, the self-restacking and sluggish ions diffusion kinetics performance of MXenes during the alkali metal ions insertion/extraction process severely impedes their cycle stability and rate capability. This paper proposes an aniline molecule welding strategy for welding p-phenylenediamine (PPDA) into the interlayers of Ti 2 C through a dehydration condensation reaction. The welded PPDA molecules can contribute pillar effect to the layered structure of Ti 2 C. The pillar effect effectively maintains the structural stability during the sodium ions insertion/extraction process and effectively expands the interlayer spacing of Ti 2 C from 1.16 to 1.38 nm, thereby enhancing ions diffusion kinetics performance and improving the long-term cycle stability. The Ti 2 C-PPDA demonstrates outstanding Na + storage capability, exhibiting a specific capacity of 100.2 mAh·g −1 at a current density of 0.1 A·g −1 over 960 cycles and delivering a remarkable rate capability 81.2 mAh·g −1 at a current density of 5 A·g −1 . The study demonstrates that expanding interlayer spacing is a promising strategy to enhance the Na + storage capacity and improve long-term cycling stability, which provides significant guidance for the design of two-dimensional Na + storage materials with high-rate capability and cycle stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Ruiwen Shu,Lijuan Nie,Zongli Wan
The fabrication of three-dimensional (3D) graphene-based composites with low filling ratio, strong absorption strength and wide absorption bandwidth remains a great challenge. In this work, nitrogen-doped reduced graphene oxide/Ti 3 C 2 T x (NRGO/MXene) composite aerogels were prepared by a facile hydrothermal method. The results of microscopic morphology analysis showed that the as-prepared NRGO/MXene composite aerogels had a unique 3D layered stacked porous network structure. Moreover, the obtained binary composite aerogels had low bulk density (11–13 mg/cm 3 ) and excellent compression recovery. Furthermore, the addition amount of MXene had great influence on the complex permittivity, impedance matching and microwave absorption properties. When the addition amount of MXene was 15 mg and the filing ratio was 10 wt%, the NRGO/MXene composite aerogel exhibited the best microwave absorption performance with the minimum reflection loss of −62.1 dB and a broad effective absorption bandwidth of 5 GHz. The practical application potential of NRGO/MXene composite aerogels was predicted by radar cross section simulation. In addition, the probable microwave absorption mechanism of NRGO/MXene composite aerogels were also elucidated. This work was expected to provide a reference for the fabrication of 3D graphene-based composites as lightweight, efficient and broadband microwave absorbers.
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POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Huolin Zhong,Hui Fang,Zhao Yan,Fangjuan Wu
MXenes, two-dimensional transition metal carbides and nitrides, show great potential in various applications. However, traditional synthesis methods often involve toxic fluorine-containing etchants, limiting large-scale production. This study introduces a novel, environmentally friendly approach for synthesizing Ti 3 C 2 T x MXene nanosheets using stone grinding-assisted exfoliation and mild alkaline etching at 80°C. The synthesized MXene nanosheets exhibited high aspect ratios with transverse dimensions mostly on the micrometer scale and a thickness of approximately 3 nm, corresponding to one to two layers of Ti 3 C 2 . MXene/polyvinyl alcohol (PVA) composite membranes were fabricated to demonstrate practical applications. The composite membrane containing 1 wt% MXene achieved a 99.9% UV shielding rate while maintaining 67% visible light transmittance. Furthermore, it significantly enhanced PLA's UV resistance, with protected samples retaining 98.1% tensile strength after 48 hours of UV exposure, compared with 47.8% for unprotected PLA. This fluorine-free synthesis method addresses environmental concerns and enables large-scale MXene production for advanced UV protection applications. Highlights Ti 3 C 2 T x MXene is made via stone grinding and alkaline etching. MXene nanosheets are produced in the micron range and are 1–2 layers thick. The fluorine-free synthesis enables green, large-scale production of MXene. MXene/PVA films show 99.99% UV shielding with 67% visible light transmittance. MXene/PVA coating improves PLA's UV resistance, keeping 98.1% of tensile strength.
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Advanced Science
·
2024
·
IF 14.3
Fuping Bian,Rui Huang,Xiaobin Li,Jiwen Hu,Shudong Lin
Composite polymer materials featured superior thermal conductivity, flame retardancy, and electromagnetic shielding performance are increasingly in demand due to the rapid development of highly miniaturized, portable, and flexible electronic devices. Herein, a facile and green ball milling shear method is utilized for generating MXene@Boron nitride (MXene@BN). The multi-functional fillers (MXene@BN) are constructed and incorporated into polydimethylsiloxane (PDMS) to prepare a multifunctional composite (PDMS/MXene@BN) for achieving improved electromagnetic interference (EMI) shielding performance and thermal conductivity as well as flame retardancy simultaneously. When the PDMS/MXene@BN composite has a MXene@BN loading of 2.4 wt.%, it exhibits a high thermal conductivity of 0.59 W m −1 K −1 , which is 210% higher than that of the pure PDMS matrix. This is attributed to its unique chestnut-like double-layer structure. With a smoke production rate (SPR) of 0.04 m 2 s −1 and total smoke production (TSP) of 3.51 m 2 , PDMS/MXene@BN 2.4 composite exhibits superb smoke suppression properties. These SPR and TSP values are 63.20% and 63.50% lower than the corresponding values of pure PDMS. Moreover, the EMI SE of the PDMS/MXene@BN 2.4 can reach 26.3 dB at 8.5 GHz. The work reported herein provides valuable insight into developing composites with multiple functions, which show strong potential for application in advanced packaging materials.
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IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Chenbo Gong,Zhongmei Xia,Runyi Han,Zichen Qi,Jingrui Feng,Zixu He,He Liu,Jing Gao,Yong Wei,Zhaopeng Xu
This study presents a high-performance triboelectric nanogenerator fabricated by incorporating 2D-MXene nanosheets into a polyvinylidene fluoride-co -hexafluoropropylene negative tribo-layer using a simple blade-coating technique, combined with a Nylon positive tribo-layer. The assembled triboelectric nanogenerator exhibits outstanding electrical performance, with increases of 185%, 295%, and 184% in open-circuit voltage, short-circuit current, and transferred charge, respectively, compared to the original polyvinylidene fluoride-co-hexafluoropropylene nanogenerator. Under optimal conditions, the device demonstrates long-term stable output, achieving a peak-to-peak short-circuit current of 49.40 μA and a peak power density of 4.9 W/m². These performance improvements are mainly due to the strong interfacial polarization induced by the 20 wt.% MXene loading, which enhances the dielectric properties and charge-trapping capability of the negative tribo-layer. The device successfully harvests biomechanical energy from human motion, further demonstrating its potential for use in wearable electronics, real-time motion sensing, and biomechanical energy harvesting applications. This study emphasizes the critical importance of advanced materials engineering in developing of next-generation, self-powered sensors, and energy harvesting systems, which are essential for enabling sustainable and portable electronic technologies.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Boxin Zhao,Xinxin Li,Changshun Gu,Yanli Wang,Hengchao Liu,Xiujie Guo,Yan Zhang,Hua Tian,Wenjing Qin,Shougen Yin
Fiber flexible strain sensors have the characteristics of small volume, light weight, good flexibility, easy deformation/recovery, and easy weaving. They can conform to various complex surfaces and endure various deformations, such as twisting and bending. Furthermore, the simple preparation process of fiber sensors lowers the production cost significantly. These features make them promising candidates for applications in motion monitoring, human-machine interface, and flexible intelligent products. However, the low sensitivity and narrow sensing range of existing sensors are still major challenges for their further development. To address these challenges, this paper proposes a MXene/MXene:MWCNTs@TPU fiber sensor, which adopts a two-step pre-stretching strategy to modify the porous TPU fiber surface with MXene and MWCNTs. The graded porous TPU fibers obtained by wet spinning can achieve 805 % stretching, providing a reliable substrate support for the fiber sensor, the combination of multi-dimensional conductive materials and the introduction of cracks and wrinkles enhance the sensitivity 277 and sensing range 510 % of the fiber sensor. The fiber sensor can detect various human motions and gestures by directly attaching to the skin or weaving into textiles, and can also be applied to information encryption transmission, demonstrating its huge potential in human health monitoring, intelligent flexible electronic products and encrypted communication.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yu Wan,Libing Zhang,Ting Wu,Chengli Tang,Haijun Song,Qianqian Cao
Conductive hydrogels with high performance and frost resistance are essential for flexible electronics, electronic skin, and soft robots. Nonetheless, the preparation of hydrogel-based flexible strain sensors with rapid response, wide strain detection range, and high sensitivity remains a considerable challenge. Furthermore, the inevitable freezing and evaporation of water in sub-zero temperatures and dry environments lead to the loss of flexibility and conductivity in hydrogels, which seriously limits their practical application. In this work, ionic liquids (ILs) and MXene are introduced into gelatin/polyacrylamide (PAM) precursor solution, and a PAM/gelatin/ILs/MXene/glycerol (PGIMG) hydrogel-based flexible strain sensor with MXene co-ILs ion–electron composite conductive network is prepared by combining the electrohydrodynamic (EHD) printing method and in-situ photopolymerization. The introduction of ILs provides an ionic conductive channel for the hydrogel. The introduction of MXene nanosheets forms an interpenetrating network with gelatin and PAM, which not only provides a conductive channel, but also improves the mechanical and sensing properties of the hydrogel-based flexible strain sensor. The prepared PGIMG hydrogel with the MXene co-ILs ion–electron composite conductive network demonstrates a tensile strength of 0.21 MPa at 602.82 % strain, the conductivity of 1.636 × 10 −3 S/cm, high sensitivity (Gauge Factor, GF = 4.17), a wide strain detection range (1–600 %), and the response/recovery times (73 ms and 74 ms). In addition, glycerol endows the hydrogel with excellent freezing (−60 °C) and water retention properties. The application of the hydrogel-based flexible strain sensor in the field of human motion detection and information transmission shows the great potential of wearable devices, electronic skin, and information encryption transmission.
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