ACS Sensors
·
2025
·
IF 9.1
Yanan Xiao,Qi Pu,Xiaoteng Jia,Shixiang Sun,Yong Liu,Jing Wang,Peng Sun,Fangmeng Liu,Geyu Lu
Wearable bifunctional sensors demonstrate considerable potential for implementation in early warning systems targeting febrile convulsions. However, significant challenges persist in simultaneously achieving real-time and precise detection of dual sensing modalities with accurate signal discrimination for clinical diagnosis. Here, we have fabricated hollow-microstructure Ti3C2Tx/poly(benzodifurandione) composite fibers for synergistic optimization of humidity–pressure sensing performance through rational microstructure engineering of the sensitive layer coupled with the dynamic reconfiguration of conductive pathways. The bifunctional sensor provides high sensitivity (168.72 kPa–1), a low detection limit (0.67 Pa) for pressure sensing, rapid response/recovery time (3 s/20 s), and low humidity hysteresis (2.18% RH) for humidity sensing. Integrated with a control circuit, a febrile convulsion early alarm system is established for real-time monitoring of muscle activities and breathing rate by sending an early alarm to the mobile terminal when in abnormal conditions. This work develops a new avenue for prompt treatment of intelligent healthcare.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fangzheng Xi,Yunfa Si,Zibo Chen,Shaowen Cao,Geng Wu,Peng Li,Bo Liu,Cheng Chen,Daping He
Ti3C2Tx MXene’s industrial adoption is hindered by its instability in humid environments and poor dispersion in nonpolar processing solvents, while conventional surface functionalization strategies severely degrade its high electrical conductivity. Herein, we address this challenge through a ligand engineering strategy using phosphate-grafted organic ligands with tailored chain lengths. Among these, phenylphosphonic acid (PhPA) is identified as the optimal ligand, enabling stable dispersion of Ti3C2Tx in 13 organic solvents (spanning from polar to nonpolar) while retaining 47.8% of pristine conductivity (14.38 × 104 S m–1), which is a significant improvement over existing methods. The PhPA-modified Ti3C2Tx exhibits exceptional environmental stability, maintaining 93% of its electromagnetic interference shielding efficiency after 180 days in humid air and showing resistance to degradation in strong alkali, seawater, and thermal exposure up to 200 °C. Mechanistic studies reveal that minimal interlayer expansion reduces electron hopping barriers and interfacial resistance, while π-electron interactions between benzene rings and the Ti–O–P covalent network create electron highways that enhance charge transfer and suppress oxidation. This work provides a rational ligand design principle to optimize MXene stability and conductivity in organic solvents, thereby advancing their applications in energy storage and electronics.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Fang,Xianrong Huang,Xiangyu Zhao,Xinpeng Hu,Gangchen Lu,Qi Shi,Jiaxin Ren,Jinping Qu,Xiang Lu
The relentless miniaturization and integration of modern electronic devices impose stringent demands on efficient thermal management and the suppression of electromagnetic interference. Addressing both challenges with a single material system is vital for the advancement of next-generation electronics. Here, we present a novel class of multifunctional, shape-stabilized phase change composites comprising an interconnected MXene/cellulose nanofiber aerogel framework infused with an ethylene vinyl acetate/paraffin wax medium. A simple, energy-efficient ethanol ice crystal exchange process is employed to fabricate mechanically robust and flexible MXene/ cellulose nanofiber aerogels, circumventing the structural limitations of conventional freeze-drying. The synergistic interaction between MXene and cellulose nanofiber endows the aerogel matrix with exceptional mechanical strength, enabling high-density vacuum impregnation of ethylene vinyl acetate/paraffin wax without compromising electromagnetic interference shielding performance (~51.9 dB, 2 mm). Owing to the high phase-change medium loading supported by the robust architecture, the composites deliver remarkable thermal energy storage capacity, with specific enthalpy values reaching ~170 J g −1 . In addition, the materials exhibit outstanding thermal reliability and flexibility under repeated cycling. This work introduces a promising strategy for integrating efficient thermal regulation and strong electromagnetic interference shielding into a unified platform, paving the way for passive thermal management, waste heat utilization, and electromagnetic compatibility in sophisticated, miniaturized electronic systems.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yanzheng Liu,Haochen Lu,Ziyi Su,Lei Lei,Sensen Liu,Shangzhen Li,Derong Zhang,Yuliang Chen,Shuchang Zheng,Yu-You Li,Jin Wang
Bioinspired nanofluidic channels have garnered significant attention for their potential in ion sieving, energy conversion, and intelligent gating. However, conventional nano bionic channels often suffer from swelling in solutions, which compromises their ion transport regulation performance. To address these limitations, we designed a Mn 2+ -alginate intercalated Ti 3 C 2 T X membrane featuring interlayer channels narrower than 6.4 Å and excellent electrical conductivity. This structure exhibits exceptional anti-swelling stability (<2 % interlayer spacing variation), enabling precise ion transport control under voltage-gating effect. Under a positive voltage bias, the permeation rate of K + ions increased by a factor of 12 compared to the unbiased condition—representing a 2.05–3.5-fold improvement over previous reports. In contrast, under a −0.8 V bias, the permeation rate of Mg 2+ ions were strongly suppressed to only 6 % of the original rate. This outstanding gating performance stems from the tunability of the channel surface charge polarity and magnitude via applied voltage, which indirectly modifies the effective transport space for ions and constructs voltage-responsive ionic gates. Our nanoscale design advancing the development of intelligent nanofluidic systems for energy-efficient seawater desalination.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ming Yan Ren,Jie Zhang
MXene, an emerging two-dimensional material, has garnered significant research attention due to its exceptional electrical conductivity and large specific surface area. In this work, TiO 2 forms on the surface of the material through controllable in-situ electrochemical oxidation and serves as the catalyst, while the highly conductive Ti 3 C 2 T x is retained in the interior, forming a Janus structure that enables different parts of the material to perform distinct functions. Due to the in-situ oxidation, the TiO 2 /Ti 3 C 2 T x heterojunctions are tightly coupled with low interfacial resistance, enhancing carrier mobility and facilitating the rapid separation of electrons and holes. In this work, the Janus structure was innovatively applied to non-enzymatic electrochemical glucose sensing, achieving remarkable glucose detection metrics, including a wide linear range (4.6 μM–5.3 mM), a low detection limit (0.4 μM), high sensitivity (5677 μA mM −1 cm −2 ), and excellent reproducibility. Notably, the sensor has been successfully applied to glucose quantification in serum samples, demonstrating reliable recoveries (97.6 %–99.1 %) for reusability. This study applies the Janus structure to glucose detection, providing a new strategy for non-enzymatic glucose sensing and expands the potential applications of MXene in electrochemical sensing applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Ankita Sinha,Kaixin Ma,Huimin Zhao
Present work reports preparation of colloidal single/few layer Ti 3 C 2 T x MXene flakes using minimally intensive layer delamination (MILD) method for rapid electroanalytical screening of carbamate pesticides . Lithium fluoride salt and hydrochloric acid (7.5 M LiF/9M HCl) was used to produce in-situ generated HF as etchant to remove Al successfully from Ti 3 AlC 2 MAX phase. Unlike the clay method (5 M LiF/6M HCl), this methodology simplified Ti 3 C 2 T x synthesis protocol resulting in Li + ions intercalated Ti 3 C 2 T x which was delaminated without further sonication . The delaminated Ti 3 C 2 T x flakes were found to be single/few layered sheets with mostly –OH and –O terminated surface groups. The characteristic 002 peak observed in X-ray diffraction (XRD) at 2θ = 6.4° with interplaner distance of 1.1137 nm suggested broadening of the peak attributed to the presence of Li + ions between Ti 3 C 2 T x flakes. Delaminated Ti 3 C 2 T x flakes were utilized as working electrode which demonstrated simultaneous and selective detection of carbamate pesticides methiocarb and diethofencarb by voltammetry . The oxidation peaks of the two pesticides were well separated by a potential difference of 0.35 V in 0.5 M H 2 SO 4 and DPV detection limits were calculated as 0.19 μg mL −1 and 0.46 μg mL −1 for methiocarb and diethofencarb respectively. Ti 3 C 2 T x flakes as electrochemical sensor exhibited long term stability and acceptable recoveries in real sample for environmental applications.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhiming Deng,Pingping Tang,Xinyu Wu,Hao-Bin Zhang,Zhong-Zhen Yu
Although hydrophilic and electrically conductive transition-metal carbon/nitride (MXenes) nanosheets hold great promise for electrically conductive and electromagnetic interference (EMI) shielding applications, the weak interaction among MXene nanosheets makes them difficult to form compressible three-dimensional architectures with high conductivity. Herein, inspired by the plant “Parthenocissus tricuspidata”, an efficient approach is demonstrated to fabricate conductive and lightweight Ti3C2Tx MXene/acidified carbon nanotube anisotropic aerogels (MCAs) with superelasticity and high thermal insulation. The MXene nanosheets construct the anisotropic and porous skeleton, while the acidified carbon nanotubes reinforce the pore walls of MXene nanosheets, making the MCAs superelastic and compressible. The superelastic MCA with only 5 wt % of the acidified carbon nanotubes is structurally stable during cyclic compressions at both high and ultralow temperatures. Its high conductivity (447.2 S m–1) and ultralow density (9.1 mg cm–3) endow its paraffin composite with a high EMI shielding efficiency of ∼51 dB at an ultralow filler content of 0.3 vol %. When the density of MCA increases to 18.2 mg cm–3, its EMI shielding effectiveness reaches 90 dB. Additionally, the porous and ultralight MCAs exhibit better thermal insulation performances as compared to commercial melamine and polystyrene foams. Therefore, the superelastic, electrically conductive, lightweight, and thermally insulating MCAs would be promising for EMI shielding applications in space equipment and portable wearable devices.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Bo Dai,Qian Jia,Bingbing Lai,Haichao Liu,Wenjing Lou,Xiaobo Wang
The development of conductive greases with friction-reducing, anti-wear, and anti-electrical corrosion performance provides an effective solution to mitigate bearing electrical erosion in electrical vehicles. In this study, a titanium carbide MXene (Ti 3 C 2 T x )-based eutectic hydrogen-bonded thickener is successfully synthesized through micro-interface reactions by exploiting the different reaction rates of –NH 3 , H 2 O, and –CNO functional groups. Tribological experiments indicate that the hydrogen bonding within the Ti 3 C 2 T x -based eutectic thickener facilitates the co-release of the thickener and Ti 3 C 2 T x nanosheets at tribological interfaces, thereby enhancing the lubricating film thickness. Moreover, the M-0.5 system (Ti 3 C 2 T x concentration of 0.5 wt%) achieves a 91 % reduction in wear volume, significantly decreases contact resistance, and effectively mitigates electrical corrosion. This study presents a feasible strategy for the design of two-dimensional oil-soluble complexes for the protection of grease lubricated bearings.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Xinyu Jia,Ruihao Wang,Qian Li,Xiyan Sun,Shuxian Li,Li Wei,Yu Tian,Jiangdong Xiang,Xitong Sun
In this work, a multifunctional adsorbent based on zwitterion modified Ti 3 C 2 T x MXene (MPI) was synthesized by surface grafting polymerization, followed by modification with polyethylenimine and sodium chloroacetate. This adsorbent exhibited a high density of functional groups, switchable surface charge characteristics and plenty of active sites of iminoacetic acid chelating groups. Subsequently, methylene blue, congo red, Pb(II), and Cr(VI) were selected as model compounds for cationic/anionic dyes and heavy metal ions to estimate the adsorption performance. The material exhibited exceptional adsorption capacities, and the maximum adsorption capacities were determined as 479.8 mg/g for methylene blue, 481.9 mg/g for congo red, 300.6 mg/g for Pb(II) and 265.9 mg/g for Cr(VI), respectively. Adsorption equilibrium was reached within 10–120 min and the adsorbent showcased excellent removal efficiency. Moreover, the adsorbent demonstrated excellent reusability，with no significant changes after ten consecutive adsorption-desorption cycles. Mechanism studies revealed that electrostatic attraction and chelation played dominant roles in the adsorption process. These results suggest that MPI possesses advantages of simple preparation, multifunctional integration, high adsorption performance, and good stability, making it a promising universal adsorbent for the removal of both dyes and heavy metal ions from wastewater.
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RSC Advances
·
2022
·Vol. 12
·期 19
·12219-12225
·
IF 4.036
Yang Song,Yuchong Kang,Wei Ma,Haibo Li
Herein, a facile one-step method is developed to in situ prepare crystalline anatase and rutile TiO2 nanocrystals on Ti3C2Tx by regulating the metastable Ti ions. The combination of TiO2 nanocrystals and Ti3C2Tx not only introduces extensive accessible sites for Na+ storage, but also promotes the charge transport by efficiently relieving the collapse of Ti3C2Tx. Compared with pristine Ti3C2Tx, the optimized TiO2/Ti3C2Tx hybrid electrode (anatase/rutile-TiO2/Ti3C2Tx, A/R-TiO2/Ti3C2Tx) exhibits a desirable specific surface area (22.5 m2 g−1), an ultralow charge transfer resistance (42.46 Ω) and excellent ion diffusion (4.01 × 10−14). Remarkably, rich oxygen vacancies are produced on TiO2/Ti3C2Tx which is beneficial to enhance the insertion/de-insertion of Na+ during the charge/discharge process. As a result, the A/R-TiO2/Ti3C2Tx delivers a high average capacity of 205.4 mA h g−1 at 100 mA g−1 and a desirable capacitance retention rate of 84.7% can be achieved after 600 cycles at 500 mA g−1.
研究领域:
材料科学
·
能源科学
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ELECTROCHIMICA ACTA
·
2020
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IF 6.215
Dong Cao,Mingxi Ren,Jie Xiong,Limei Pan,Yi Wang,Xinzhe Ji,Tai Qiu,Jian Yang,Chuanfang (John) Zhang
In this work, flexible free-standing Ti 3 C 2 T x -CNT/SiNPs (Si nanoparticles) resilient films with hierarchical pore are prepared by a simple and scalable self-assembly method. The Ti 3 C 2 T x nanosheets and acidified CNTs are attracted by hydrogen bonds via surface functional groups, and are further assembled with positively charged SiNPs modified by cetyltrimethyl-ammonium bromide via the electrostatic attraction. The subtle assembling and synergistic action among 0 dimensional (0D) SiNPs - 1 dimensional (1D) CNTs and 2 dimensional (2D) Ti 3 C 2 T x nanosheets offer the films with excellent mechanical flexibility, conductivity, abundant hierarchical voids and thus superior and impressive electrochemical properties as binder-free LIBs anode. The hierarchical pore structure effectively inhibits both the aggregation of SiNPs and restacking of Ti 3 C 2 T x nanosheets, provides fast electron and ion diffusion path, facilitates the penetration of electrolyte and absorbs the volume expansion of SiNPs during the charge and discharge processes. The Ti 3 C 2 T x -CNT/SiNPs film exhibits a high areal capacities up to 5.2 mAh cm −2 at the current density of 100 mA g −1 . Moreover, a good cyclic retention of 2.2 mAh cm −2 at an area mass loading of 2.3 mg cm −2 after 150 cycles is also achieved. Furthermore, a pouch cell based on the Ti 3 C 2 T x -CNT/SiNPs film anode is demonstrated, showing promising preliminary electrochemical performance and indicating the future application prospect in flexible LIBs.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
先进电池技术
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Haitao Zhang,Hanyu He,Yongxiang Huang,Shi Pu,Yanting Xie,Junfeng Huang,Xinling Jiang,Yongbin Wang,Shenglong Wang,Hongzhi Peng,Yuanxiao Qu,Weiqing Yang
As a recent rising star 2D material, MXenes have attracted great attention in many fields. However, the weak interaction induced self-stacking phenomenon and surface oxidation caused structure failure seriously hinder the practical application of MXenes. Herein we develop a biothermochemistry method to construct 3D crosslinked Ti 3 C 2 T x (3D-MX). This novel structured 3D-MX can be prepared in five different kinds of biological reagents, showing good university. After crosslinking, 3D-MX not only resists layer stacking but also exhibits extreme on-shelf stability up to 550 days. We reveal that the formation mechanism originates from the electrostatic/chemical interaction between surface functional groups and the crosslinking agents. Interestingly, the biothermochemical treated Ti 3 C 2 T x MXenes exhibit an extremely-rapid film-processed capability (only 3 min), addressing the long-standing issue of low-efficient and tedious solution-vacuum filtrated 2D films. To further verify its practical application, we assemble 3D-MX based supercapacitors that show a high specific capacitance of 265 Fg −1 at 1 A g −1 , and moreover, no supercapacitance attenuation within 720 h. This proposed biothermochemistry method to simply and rapidly build 3D Ti 3 C 2 T x crosslinked network provides a new perspective to promote the practical application of MXenes through simultaneously addressing their self-stacking and oxidative degradation issues.
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