CONSTRUCTION AND BUILDING MATERIALS
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2024
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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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RARE METALS
·
2024
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IF 9.6
Li Zhao-Yang,Zhao Wei-Jun,Sun Yu,Zhou Bing,Feng Yue-Zhan,Liu Chun-Tai
The pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti 3 C 2 T x MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure. However, pure Ti 3 C 2 T x MXene films often lack the mechanical properties required for practical engineering applications, and traditional reinforcement methods tend to reduce electrical conductivity. This work demonstrates an effective strategy to enhance the alignment and densely packed layered structure of Ti 3 C 2 T x MXene films by regulating the acidity and alkalinity of Ti 3 C 2 T x MXene aqueous solutions. This approach simultaneously improves mechanical strength and electromagnetic interference shielding effectiveness (EMI SE). Compared with original Ti 3 C 2 T x MXene films, MXene films modified with ammonia solution (NH 3 ·H 2 O) via OH − show a significant improvement in tensile strength (27.7 ± 1.9 MPa). Meanwhile, MXene films treated with hydrochloric acid (HCl) via H + reach an even higher tensile strength of 39 ± 1.5 MPa. Moreover, the EMI SE values of the treated MXene films increase significantly, each reaching 66.2 and 58.4 dB. The maximum improvements in EMI SE values for the acid- and alkali-treated samples are 17.9% and 4%, respectively. In conclusion, the simultaneous enhancement of mechanical strength and EMI shielding efficacy highlights the potential of acid- and alkali-treated Ti 3 C 2 T x MXene films for applications in ultrathin and flexible EMI shielding materials. Graphical abstract
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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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高影响因子
SENSORS
·
2024
·Vol. 24
·期 1
·271
·
IF 3.4
Junming Cao,Yuanqing Jiang,Xiaoming Li,Xueguang Yuan,Jinnan Zhang,Qi He,Fei Ye,Geng Luo,Shaohua Guo,Yangan Zhang,Qi Wang
Fiber-based flexible sensors have promising application potential in human motion and healthcare monitoring, owing to their merits of being lightweight, flexible, and easy to process. Now, high-performance elastic fiber-based strain sensors with high sensitivity, a large working range, and excellent durability are in great demand. Herein, we have easily and quickly prepared a highly sensitive and durable fiber-based strain sensor by dip coating a highly stretchable polyurethane (PU) elastic fiber in an MXene/waterborne polyurethane (WPU) dispersion solution. Benefiting from the electrostatic repulsion force between the negatively charged WPU and MXene sheets in the mixed solution, very homogeneous and stable MXene/WPU dispersion was successfully obtained, and the interconnected conducting networks were correspondingly formed in a coated MXene/WPU shell layer, which makes the as-prepared strain sensor exhibit a gauge factor of over 960, a large sensing range of over 90%, and a detection limit as low as 0.5% strain. As elastic fiber and mixed solution have the same polymer constitute, and tight bonding of the MXene/WPU conductive composite on PU fibers was achieved, enabling the as-prepared strain sensor to endure over 2500 stretching–releasing cycles and thus show good durability. Full-scale human motion detection was also performed by the strain sensor, and a body posture monitoring, analysis, and correction prototype system were developed via embedding the fiber-based strain sensors into sweaters, strongly indicating great application prospects in exercise, sports, and healthcare.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Yajun Chen,Yi Hao,Lingling Feng,Jinmin Meng,Zhenming Yang,Huiying Wu,Peiying Li,Zhen Zhu,Bing Zhao,Qufu Wei
MXene-composited conductive hydrogels have received extensive attention in flexible, portable and self-powered wearable electronics based on triboelectric nanogenerators (TENGs). Yet, the incompatibility of the MXene with hydrogel matrix due to easy oxidation and weak interactions with polymer chains weakens the performance of hydrogels. Herein, inspired by the structure of leaves, tannic acid (TA) with abundant catechol groups was introduced to encapsulate MXene and TEMPO-oxidized cellulose nanofibers (TOCNF) was intercalated to support the MXene nanosheets as leaf vein, forming a stable TOCNF/TA@MXene nano-motif with three-dimensional (3D) network. Benefiting from the addition of TOCNF, TOCNF/TA@MXene exhibited long-term stability (>10 days) in aqueous environment with the presence of oxidant. Therefore, the obtained TOCNF/TA@MXene-composited hydrogel (PCM) exhibited high stretchability (>800 %), reliable fatigue resistance and good adhesiveness, which can be served as electrodes of flexible TENGs. The formed PCM-TENG demonstrated flexibility and versatility, achieving an open-circuit voltage of 106 V, a short-circuit current of ~2 μA and a transfer charge of ~31 nC even in a single-electrode mode. Besides, PCM-TENG showed enduring practicality and responsiveness as a self-powered sensor to detect human biomotions. PCM-TENG also presented desirable photothermal antibacterial capacity and cytocompatibility. All these properties endowed the PCM-TENG with great application potential in human healthcare.
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Nano-Micro Letters
·
2025
·
IF 36.3
Ruiqi Xu,Hongzhi Cui,Na Wei,Yang Yu,Lin Dai,Xiaohua Chen
Solar-driven interfacial evaporation is one of the most attractive approaches to addressing the global freshwater shortage. However, achieving an integrated high evaporation rate, salt harvesting, and multifunctionality in evaporator is still a crucial challenge. Here, a novel composite membrane with biomimetic micro-nanostructured superhydrophobic surface is designed via ultrafast laser etching technology. Attractively, the double‐transition‐metal (V 1/2 Mo 1/2 ) 2 CT x MXene nanomaterials as a photothermal layer, exhibiting the enhanced photothermal conversion performance due to elevated joint densities of states, which enables high populations of photoexcited carrier relaxation and heat release, provides a new insight into the photothermal conversion mechanism for multiple principal element MXene. Hence, the (V 1/2 Mo 1/2 ) 2 CT x MXene-200 composite membrane can achieve a high evaporation rate of 2.23 kg m −2 h −1 under one sun, owing to the enhanced “light trap” effect, photothermal conversion, and high-throughput water transfer. Synergetically, the membrane can induce the directed precipitation of salt at the membrane edge, thus enabling salt harvesting for recycling and zero-emission of brine water. Moreover, the composite membrane is endowed with excellent multifunctionality of anti‐/de‐icing, anti-fouling, and antibacterial, overcoming the disadvantage that versatility is difficult to be compatible. Therefore, the evaporator and the promising strategy hold great potential for the practical application of solar evaporation.
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Science Advances
·
2024
·Vol. 10
·期 15
·
IF 11.7
Hanwen Guo,Xiaoying Chu,Yishun Guo,Jianhua Yang,Yingying Jin,Liyang Zhou,Yaou Peng,Qingying Wang,Fan Lu,Bailiang Wang
Contact lenses (CLs) are prone to adhesion and invasion by pollutants and pathogenic bacteria, leading to infection and inflammatory diseases. However, the functionalization of CL (biological functions such as anti-fouling, antibacterial, and anti-inflammatory) and maintaining its transparency still face great challenges. In this work, as a member of the MXenes family, vanadium carbide (V2C) is modified onto CL via a water transfer printing method after the formation of a tightly arranged uniform film at the water surface under the action of the Marangoni effect. The coating interface is stable owing to the electrostatic forces. The V2C-modified CL (V2C@CL) maintains optical clarity while providing good biocompatibility, strong antioxidant properties, and anti-inflammatory activities. In vitro antibacterial experiments indicate that V2C@CL shows excellent performance in bacterial anti-adhesion, sterilization, and anti-biofilm formation. Last, V2C@CL displays notable advantages of bacteria elimination and inflammation removal in infectious keratitis treatment.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Zhou Yang,Zhang Wen,Pan Dong,Li Zhaoyang,Zhou Bing,Huang Ming,Mi Liwei,Liu Chuntai,Feng Yuezhan,Shen Changyu
The morphological distribution of absorbent in composites is equally important with absorbents for the overall electromagnetic properties, but it is often ignored. Herein, a comprehensive consideration including electromagnetic component regulation, layered arrangement structure, and gradient concentration distribution was used to optimize impedance matching and enhance electromagnetic loss. On the microscale, the incorporation of magnetic Ni nanoparticles into MXene nanosheets (Ni@MXene) endows suitable intrinsic permittivity and permeability. On the macroscale, the layered arrangement of Ni@MXene increases the effective interaction area with electromagnetic waves, inducing multiple reflection/scattering effects. On this basis, according to the analysis of absorption, reflection, and transmission (A–R–T) power coefficients of layered composites, the gradient concentration distribution was constructed to realize the impedance matching at low-concentration surface layer, electromagnetic loss at middle concentration interlayer and microwave reflection at high-concentration bottom layer. Consequently, the layered gradient composite (LG5-10–15) achieves complete absorption coverage of X-band at thickness of 2.00–2.20 mm with RL min of −68.67 dB at 9.85 GHz in 2.05 mm, which is 199.0%, 12.6%, and 50.6% higher than non-layered, layered and layered descending gradient composites, respectively. Therefore, this work confirms the importance of layered gradient structure in improving absorption performance and broadens the design of high-performance microwave absorption materials.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Haseebul Hassan,Khakemin Khan,Sidra Mumtaz,Arslan Ahmed Rafi,Ahmed Mahmoud Idris,Ahmed Althobaiti,Alsharef Mohammad
Supercapacitors represent a promising avenue for advanced energy storage solutions. However, achieving devices that simultaneously possess all the ideal properties, such as high capacitance, fast charge-discharge rates, and excellent cyclability, remains a significant challenge. Herein, a facile approach for fabricating carbon aerogel-induced chromium metal-organic framework (CA@MIL-101) integrated with titanium carbide MXene (CA@MIL-101-(Cr)/Ti 3 C 2 T x ) nanocomposites was demonstrated via hydrothermal method. The CA@MIL-101-(Cr)/Ti 3 C 2 T x nanocomposites offer numerous divalent ion active sites and significantly improve charge transfer kinetics, attributed to their interconnected porous structure. This novel anode exhibits an outstanding specific capacity of 1632 Cg -1 with a PVDF binder-based electrode and a high rate of performance. Moreover, a full-cell supercapacitor was developed with carbon aerogel as the cathode and CA@MIL-101 (Cr)/Ti 3 C 2 T x as the anode. With its hierarchical pore structure and functional groups, the CA@MIL-101 (Cr)/Ti 3 C 2 T x anode achieves an energy density of 38 Wh-kg −1 , a high-power density of 1280 W-kg −1 , and robust anti-self-discharge behavior. The CA@MIL-101 (Cr)/Ti 3 C 2 T x //CA supercapattery uses both adsorption/desorption processes and faradaic reactions for charge storage. The synthesized materials also perform exceptionally well electro-catalytically. This research advances high-performance CA@MIL-101 (Cr)/Ti 3 C 2 T x electrodes, enhances understanding of supercapacitor charge storage, and paves the way for next-generation energy storage technologies.
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Nano Materials Science
·
2024
·
IF 12.6
Wenting Tao,Wenqin Shao,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
The increasingly serious electromagnetic (EM) radiation and related pollution effects have gradually attracted people's attention in the information age. Hence, it's crucial to develop adaptive shielding materials with minimum EM waves (EMW) reflection. In this paper, Ag nanoparticles loaded mesoporous carbon hollow spheres (MCHS@Ag) were synthesized by chemical reduction method, and cellulose nanofibers (CNF)/MXene/MCHS@Ag homogeneous composites were prepared. The total EM interference shielding efficiency (SE T ) of CNF/MXene/MCHS@Ag composite film was 32.83 dB (at 12.4 GHz), and the absorption effectiveness (SE A ) was improved to 26.6 dB, which was 63.1% and 195.5% higher than that of CNF/MXene/MCHS composite film. The low dielectric property of MCHS effectively optimized the impedance matching between the composites and air. The hollow porous structure prolonged the transmission path of EMW and increased the absorption loss of the composites. At the same time, Ag nanoparticles located the MCHS were helpful to construct the internal conductive path overcoming the damage of the conductive property caused by the low dielectric of MCHS. This research adopts a straightforward method to construct a lightweight, pliable, and mesoporous composites for EMI shielding, which serves a crucial role in the current era of severe EM pollution.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Tianyao Wang,Yu Wang,You Zeng,Xingguo Tian,Xiaoyan Xu
Histamine is a highly toxic biogenic amine in food, making its sensitive and rapid detection methods vital for the assurance of edible safety and human health. Here, we explored for the first time a smartphone-enabled ratiometric imprinted fluorescence sensor based on blue/orange MXene quantum dots (MQDs) for fluorescence and visual detection of histamine. A linear relationship between the concentration of histamine and the fluorescence response of the sensor was found in the range of 1–60 μM with a limit of detection (LOD) of 21.9 nM for fluorescence detection and 92.2 nM for visual detection. In addition, the method was validated for the detection of real samples with excellent recoveries from 96.52% to 105.32%. Therefore, this work greatly expands the application of MQDs in the fluorescence sensing field, as well as provides a visual strategy for in-situ detection of histamine in food.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qiang Wang,Shenshen Guan,Ranyun Wu,Liangliang Su,Yalong Yang,Xulai Zhu,Yuxia Hu,Junpeng Zhang,Jia Si,Wei Zeng
The aqueous ammonium ion hybrid supercapacitor (AIHSC) for dual-energy storage mechanisms of bulk intercalation and bulk adsorption has attracted extensive attention from researchers in the field of energy storage. However, AIHSC currently lacks sufficiently effective anode materials with high capacitance and stability. Pre-intercalated MXene electrodes have demonstrated high-capacity advantages in the fields of magnesium and zinc ion energy storage, but there have been no research reports in the field of AIHSC. Here, for the first time, pre-intercalated MXene was used as the anode material for AIHSC, and a high-performance multifunctional AIHSC was constructed by combining it with multi-walled carbon nanotubes-FeFe(CN) 6 cathode. A series of characterizations and theoretical calculations show that pre-intercalated strategies can effectively enhance the electrochemical properties of MXene. As a result, the pre-intercalated MXene anode shows a superior ammonium storage capacitance of 252 F g −1 and a high stability of 6000 cycles. The quasi-solid-state AIHSC also displays the excellent electrochemical performance and can be directly used as a pressure sensor to monitor external pressure changes and human limb movements. This study provides a viable path to the effective development of high-performance multifunctional AIHSCs and their anodes.
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危险品化学品经营许可证（带存储）