ACS Applied Materials & Interfaces
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2020
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IF 8.758
Bing Zhou,Mengjie Su,Daozheng Yang,Gaojie Han,Yuezhan Feng,Bo Wang,Jialu Ma,Jianmin Ma,Chuntai Liu,Changyu Shen
Transparent conductive film (TCF) is promising for optoelectronic instrument applications. However, designing a robust, stable, and flexible TCF that can shield electromagnetic waves and work in harsh conditions remains a challenge. Herein, a multifunctional and flexible TCF with effective electromagnetic interference shielding (EMI) performance and outstanding electro-photo-thermal effect is proposed by orderly coating Ti3C2Tx MXene and a silver nanowire (AgNW) hybrid conductive network using a simple and scalable solution-processed method. Typically, the air-plasma-treated polycarbonate (PC) film was sequentially spray-coated with MXene and AgNW to construct a highly conductive network, which was transferred and partly embedded into an ultrathin poly(vinyl alcohol) (PVA) film using spin coating coupled with hot pressing to enhance the interfacial adhesion. The peeled MXene/AgNW-PVA TCF exhibits an optimal optical and electrical performance of sheet resistance 18.3 Ω/sq and transmittance 52.3%. As a consequence, the TCF reveals an effective EMI shielding efficiency of 32 dB in X-band with strong interfacial adhesion and satisfactory flexibility. Moreover, the high electrical conductivity and localized surface plasmon resonance (LSPR) effect of hybrid conductive network endow the TCF with low-voltage-driven Joule heating performance and excellent photothermal effect, respectively, which can ensure the normal functioning under extreme cold condition. In view of the comprehensive performance, this work offers new solutions for next-generation transparent EMI shielding challenges.
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ACS Applied Materials & Interfaces
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2020
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IF 8.758
Cuizhen Yang,Quanguo Jiang,Huajie Huang,Haiyan He,Lu Yang,Weihua Li
Direct methanol fuel cells with high energy conversion efficiency and low hazard emissions have aroused great attention from both academic and industrial communities, but their large-scale commercial application has been blocked by high costs as well as short lifespan of the anode Pt catalysts. Here, we demonstrate a simple and scalable noncovalent strategy for the synthesis of quasi-one-dimensional (1D) Pt nanoworms grown on poly(diallyldimethyl-ammonium chloride) (PDDA)-functionalized Ti3C2Tx nanosheets as anode catalysts for methanol electrooxidation. Interestingly, the introduction of PDDA on Ti3C2Tx nanosheets can not only effectively adjust their surface charge property to strengthen the electrostatic interaction between metal and support but also induce the stereoassembly of worm-shaped Pt nanocrystals with abundant catalytically active grain boundaries, which enable the resulting hybrid to express high electrocatalytic activity, remarkable durability, and strong antipoisoning ability for methanol electrooxidation, which are better than those of the traditional Pt nanoparticle electrocatalysts loaded on carbon black, carbon nanotubes, reduced graphene oxide, and MXene matrixes. Theoretical simulations disclose that the more stable worm-shaped Pt configuration with an optimized electronic structure on the Ti3C2Tx surface possesses a weaker CO adsorption ability than that of the Pt nanoclusters, thereby providing a dramatically enhanced and sustainable electrocatalytic performance.
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ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 47
·2000922
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IF 16.836
Peng Zhang,Qizhen Zhu,Razium A. Soomro,Shiyu He,Ning Sun,Ning Qiao,Bin Xu
MXenes with metallic conductivity, high pseudo-capacitance and 2D structure, are promising flexible electrode materials for supercapacitors, but suffer from the restacking issue, which hinders ion accessibility and causes sluggish ion kinetics. Herein, a simple in situ ice template strategy is proposed to fabricate free-standing, flexible 3D porous Ti 3 C 2 T x /carbon nanotubes (CNTs) film (3D-PMCF) by freeze-drying Ti 3 C 2 T x -based hydro-films without any postprocessing. During the freeze-drying process, small ice grains are in situ transformed from the residual water molecules in the Ti 3 C 2 T x interlayer and then act as a self-sacrifice template to construct a 3D porous network. CNTs introduced in the hydro-film increase the amount of interlayer water and the resultant porosity. The 3D structure of Ti 3 C 2 T x significantly increases the exposed surface active sites and accelerates the ion transport, meanwhile maintaining good flexibility. Consequently, the flexible 3D-PMCF film delivers a capacitance of 375 F g −1 at 5 mV s −1 and retains 251.2 F g −1 at 1000 mV s −1 with excellent cycling stability, much superior to the conventional densely stacked Ti 3 C 2 T x film. Being assembled into a symmetric supercapacitor, an energy density of 9.2 Wh kg −1 is realized. This work demonstrates a simple and efficient route for constructing high-performance and flexible 3D MXene film electrodes for supercapacitors.
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Journal of Materials Chemistry C
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2020
·Vol. 8
·期 21
·7170-7180
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IF 7.059
Zongxu Liu,Wenyan Wang,Jiaojun Tan,Jin Liu,Meifang Zhu,Baolei Zhu,Qiuyu Zhang
As electronic devices are rapidly developing and growing in huge numbers by the hour, there is an urgent demand to develop next generation electromagnetic interference (EMI) shielding materials that need to be flexible, ultra-thin, light in weight, mechanically strong and highly efficient in blocking the electromagnetic waves. We address this problem by fabricating polyurethane/Ti3C2Tx MXene nanocomposite films with a nacre-like “brick and mortar” highly ordered nanostructure. The nacre mimetic polyurethane/MXene nanocomposite films combine impressive flexibility, very good mechanical properties (tensile strength ∼100 MPa, fracture toughness ∼3.0 MJ m−3), superior electric conductivity (∼2897.4 S cm−1), outstanding EMI shielding properties (thickness specific shielding effectiveness: 33771.92 dB cm2 g−1), and ultra-small thickness (<10 μm), which can be attributed to the bioinspired material design and the careful choice of polyurethane as a polymer matrix. We envisage further advancing of the property profiles of the EMI shielding nanocomposites by optimizing the soft polymer interactions and their wide applications in different fields.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 137
·期 17
·48621
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IF 2.188
Zhuwu Yi,Jian Yang,Xiaochao Liu,Long Mao,Lingna Cui,Yuejun Liu
MXene modified by stearic acid (Ti 3 C 2 T x -g- SA) is incorporated into poly(lactic acid) (PLA) matrix to prepare Ti 3 C 2 T x -g- SA/PLA composites. The effects of Ti 3 C 2 T x -g- SA to pure PLA are investigated, including crystallization, mechanical, and thermal properties. Fourier transform infrared spectroscopy and X-ray diffraction analyses confirm that Ti 3 C 2 T x interlayer is successfully intercalated by SA, and the interlayer spacing of Ti 3 C 2 T x is increased. Differential scanning calorimetry illustrates that the cold crystallization enthalpy (Δ H cc ), melting enthalpy (Δ H m ), and crystallinity ( X c ) of Ti 3 C 2 T x -g- SA/PLA composites are improved by the plasticization and heterogeneous nucleation effect of Ti 3 C 2 T x -g- SA. Specially, the Ti 3 C 2 T x -g- SA/PLA composites exhibit excellent mechanical properties at an appropriate content of the Ti 3 C 2 T x -g- SA. Compared with pure PLA, the elongation at break of the Ti 3 C 2 T x -g- SA/PLA composite is increased 5.9-fold (up to 131.6%) when only containing 0.5 wt % Ti 3 C 2 T x -g- SA. Besides, the Ti 3 C 2 T x -g- SA/PLA composites exhibit good thermal stability in the low loading (lower than 1 wt %) of Ti 3 C 2 T x -g- SA. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48621.
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Advanced Electronic Materials
·
2019
·Vol. 6
·期 1
·1900493
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IF 6.312
Huiwu Mao,Chen Gu,Shiqi Yan,Qian Xin,Shuai Cheng,Peng Tan,Xiangjing Wang,Fei Xiu,Xiaoqin Liu,Juqing Liu,Wei Huang,Linbing Sun
Low-dimensional MXene materials including MXene quantum dots (MQDs) and nanosheets have attracted extensive attention owing to their unique structures and novel properties, but their most attractive features are still less explored than expected. A systematic study of the memory effects of MQD-based electronics is reported. Monodisperse MQDs are prepared by using a one-step facile hydrothermal synthetic method. By varying the MQD content in polyvinylpyrrolidone (PVP) hybrid composite films, the electrical conductance of an indium tin oxide (ITO)/MQD-PVP/gold (Au) sandwich structure can be tuned precisely from insulator behavior to irreversible resistive switching, reversible resistive switching, and conductor behavior. These irreversible and reversible resistive switches are capable of exhibiting write-once-read-many times (WORM) and flash memory effects, respectively. Both types of devices operate stably under retention testing, with a high on/off current ratio up to 100. The tunable memory and transient features of these hybrid films are likely due to MQD charge trapping due to their quantum confinement and dissolvability of memristive components. The results suggest that MXene nanomaterials are promising as resistive switching trigger for emerging nonvolatile memories for data storage, specially data storage security.
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Biosensors-Basel
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2022
·Vol. 12
·期 10
·865
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IF 5.743
Yuting Qiao,Xianrong Liu,Zhi Jia,Peng Zhang,Li Gao,Bingxin Liu,Lijuan Qiao,Lei Zhang
Abnormal protein phosphorylation may relate to diseases such as Alzheimer’s, schizophrenia, and Parkinson’s. Therefore, the real-time detection of phosphoproteins in sweat was of great significance for the early knowledge, detection, and treatment of neurological diseases. In this work, anatase/rutile TiO2was in situ grown on the MXene surface to constructing the intercalation structure MXene@anatase/rutile TiO2ternary heterostructure as a sensing platform for detecting phosphoprotein in sweat. Here, the intercalation structure of MXene acted as electron and diffusion channels for phosphoproteins. The in situ grown anatase/rutile TiO2with n-n-type heterostructure provided specific adsorption sites for the phosphoproteins. The determination of phosphoprotein covered concentrations in sweat, with linear range from 0.01 to 1 mg/mL, along with a low LOD of 1.52 μM. It is worth noting that, since the macromolecular phosphoprotein was adsorbed on the surface of the material, the electrochemical signal gradually decreased with the increase of phosphoprotein concentration. In addition, the active sites in the MXene@anatase/rutile TiO2ternary heterojunction and synergistic effect of the heterojunction were verified by first-principle calculations to further realize the response to phosphoproteins. Additionally, the effective diffusion capacity and mobility of phosphoprotein molecules in the ternary heterojunction structure were studied by molecular dynamics simulation. Furthermore, the constructed sensing platform showed high selectivity, repeatability, reproducibility, and stability, and this newly developed sensor can detect for phosphoprotein in actual sweat samples. This satisfactory sensing strategy could be promoted to realize the noninvasive and continuous detection of sweat.Keywords:sweat;phosphoprotein;MXene;anatae/rutile TiO2;intercalation structure;healthcare monitoring
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Linzhe Xu,Yingbo Chen,Wenxuan Su,Junbo Cui,Siyu Wei
Two-dimensional metal carbides (MXene) and amidoxime-based materials have attracted more and more attention in heavy metal adsorption. Herein, we prepared a mixed matrix membrane of amidoximized polyacrylonitrile with MXene particles by a simple phase separation method (M/PAO mixed matrix membrane). The M/PAO mixed matrix membrane had excellent U(VI) ion selectivity compared to vanadium. Under the synergistic adsorption of the two functional adsorption units, the maximum adsorption capacity can reach 10.31 g/m 2 (364.46 mg/g) at pH = 6, while the adsorption capacity of U(VI) can reach 37.49 mg/m 2 (1.3225 mg/g) in a seven-day natural seawater experiment, which was far more than that of single amidoxime-based adsorbent. Pseudo-second-order kinetics and Langmuir adsorption model were used to study the adsorption behavior. The results of various characterization methods showed the complexation mechanism between the M/PAO mixed matrix membrane and U(VI) ions. Considering its excellent adsorption capacity and facile preparation process, we believe that the M/PAO mixed matrix membrane is one of the most promising candidates for large-scale U(VI) extraction from seawater.
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ACS Applied Materials & Interfaces
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2022
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IF 10.383
Bin Yang,Lin Wang,Junfan Zhao,Ruixue Pang,Baolong Yuan,Jiaojun Tan,Shunxi Song,Jingyi Nie,Meiyun Zhang
Pressure sensors with desirable flexibility, robustness, and versatility are urgently needed for complicated smart wearable devices. However, developing an ideal multifunctional flexible sensor is still challenging. In this work, a composite aerogel film sensor with an internal three-dimensional (3D) microporous and hierarchical structure is successfully fabricated by the self-assembly of aramid nanofiber (ANF) and conductive MXene by vacuum-assisted filtration and ice crystal growth. The resultant MXene/ANF aerogel film with a mass ratio of 3/7 (30% MAAF) presents high robustness with an outstanding tensile strength of 14.1 MPa and a modulus of 455 MPa while retaining appealing flexibility and sensitive characteristics due to the 3D microstructure. Accompanied by superior electric conductivity, the MAAF sensor performs noticeably in human motion and microexpression detection with a fast response time of 100 ms and a high sensitivity of 37.4 kPa–1. In addition, MAAF exhibits considerable thermal shielding performance based on the excellent thermostability. Moreover, it possesses prominent electrothermal property with a wide heating temperature range (32.7–242 °C) in a fast thermal response time (5 s) due to the Joule effect. Additionally, a hydrophobic SiO2 coating is introduced on the surface of MAAF to further broaden the sensing application, and the obtained MAAF@SiO2 sensor shows distinguished sensing capability underwater, which can be accurately applied to swimming monitoring. Therefore, this work provides a highly flexible, lightweight, robust, and multifunctional aerogel film sensor, showing promising potential in smart wearable sensing and healthcare devices, intelligent robots, and underwater detection.
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ACS Nano
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2022
·
IF 18.027
Yuan Cao,Tie Chang,Chao Fang,Yuanyuan Zhang,Huilan Liu,Gang Zhao
The phenomena of ice formation and growth are of great importance for climate science, regenerative medicine, cryobiology, and food science. Hence, how to control ice formation and growth remains a challenge in these fields and attracts great interest from widespread researchers. Herein, the ice regulation ability of the two-dimensional MXene Ti3C2Tx in both the cooling and thawing processes is explored. Molecularly speaking, the ice growth inhibition mechanism of Ti3C2Tx MXene is ascribed to the formation of hydrogen bonds between functional groups of −O–, −OH, and −F distributed on the surface of Ti3C2Tx and ice/water molecules, which was elucidated by the molecular dynamics simulation method. In the cooling process, Ti3C2Tx can decrease the supercooling degree and inhibit the sharp edge morphology of ice crystals. Moreover, taking advantage of the outstanding photothermal conversion property of Ti3C2Tx, rapid ice melting can be achieved, thus reducing the phenomena of devitrification and ice recrystallization. Based on the ice restriction performance of Ti3C2Tx mentioned above, Ti3C2Tx is applied for cryopreservation of stem-cell-laden hydrogel constructs. The results show that Ti3C2Tx can reduce cryodamage to stem cells induced by ice injury in both the cooling and thawing processes and finally increase the cell viability from 38.4% to 80.9%. In addition, Ti3C2Tx also shows synergetic antibacterial activity under laser irradiation, thus realizing sterile cryopreservation of stem cells. Overall, this work explores the ice inhibition performance of Ti3C2Tx, elucidates the physical mechanism, and further achieves application of Ti3C2Tx in the field of cell cryopreservation.
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Materials Today Physics
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2023
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IF 11.5
Xinyu Wang,Qingbo Xu,Jingchao Wang,Peng Wang,Yanyan Zhang
Cracking of conductive coatings is a primary cause of the poor durability of conductive fabrics. To address this, an Ag/MXene colloidal solution was prepared, which was stable owing to the evenly dispersed Ag particles on the MXene sheet structure. A cotton fabric sample was then coated with Ag/MXene using a dipping method, which resulted in excellent electrical conductivity. Finally, the Ag/MXene conductive coating on the polydimethylsiloxane (PDMS)-covered fabric significantly improved the conductive durability of the fabric. The finished cotton fabric exhibited excellent conductive properties, with a surface resistance of 13.9 ± 0.3 Ω/sq. In addition, the finished cotton fabric exhibited excellent mechanical durability against bending, folding, and strain. Therefore, finished cotton fabrics with excellent electrical conductivity and durability have great potential for application in wearable textiles and flexible sensors.
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DIAMOND AND RELATED MATERIALS
·
2023
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IF 4.1
Huaijie Cao,Xiaoqing Ma,Tiange Wang,Wenhu Jia,Baolong Gong,Longling Guo,Pengzhan Xue,Chengrong Zhu,Xu Tian,YuLin Min,Qunjie Xu
Corrosion of metals leads to great economic losses and safety hazards. To address the corrosion problem of Al alloy in aggressive medium, two-dimensional (2D) graphene-like MXene composite coatings are proposed to enhance the corrosion resistance . Despite great progress, it still faces challenge to design high-performance MXene-based composite coating via a facile strategy because of the complex surface functionalization , orientation control, and the conductivity of MXene. Herein, a multilayer Ti 3 C 2 T x MXene/dodecyltrimethoxysilane (MXene/DTMS) coating is prepared by a layer-by-layer spraying method at ambient temperature to maximize the physical barrier of MXene nanosheets . As a result, the incorporation of MXene nanosheets can avoid the structural defects of silane coating after curing process, thereby improving the coating resistance and charge transfer resistance by ~11- and ~390-fold in comparison to Al counterpart, respectively. Beyond the traditionally complex surface functionalization and orientation control, the multilayer coating with complete coverage and strong physical barrier ability exhibits the high corrosion resistance with a impedance modulus of 3.74 × 10 7 Ω·cm 2 in 3.5 wt% NaCl solution. The designed coating shows promising applications in surface protection on Al alloy used in transmission cable, shafts, gears, and blades for offshore wind turbines .
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