SYNTHETIC METALS
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2022
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IF 4
Yuhua Dong,Yuanyuan Yin,Xueyan Du,Chunmei Liu,Qiong Zhou
A near-infrared (NIR) light-induced shape memory-assisted self-healing coating was developed by incorporating Ti 3 C 2 MXene and polyaniline (PANI) composites into epoxy resin. Ti 3 C 2 thin nanosheets were obtained by etching Ti 3 AlC 2 powders with HCl and LiF and then intercalating with tetramethylammonium hydroxide. Then MXene@PANI composites were synthesized through chemical oxidation . Result of ultraviolet–visible spectroscopy showed two obvious characteristic peaks at visible and NIR light range, indicating that the MXene@PANI composite could be used as photothermal agents to induce shape memory effect of the epoxy resin. Results of electrochemical impedance spectra and scanning vibrating electrode technique indicated that the addition of 5 wt% MXene@PANI to the epoxy resin coating could improve its protection performance, and own 91% self-healing efficiency due to the NIR absorbing ability of MXene and PANI and the passivation of PANI. Linear scanning voltammetry measurements indicated that the shape memory effect and self-healing performance of the epoxy resin matrix were affected by the corrosion product in the scratched area.
研究领域:
材料科学
·
化学工程
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-12
·
IF 5.3
Chen Jing,Xue Wenli,Shi Yaqin,Liu Wenjing,Ma Rongfang
An electrochemical sensor based on MXene/PANI/SnO 2 nanomaterials was developed for the detection of 4-aminophenol (4-AP). In situ oxidative growth of PANI on the MXene surface effectively hindered the stacking of the lamellae and increased the specific surface area of the composites. Further complexation of tin dioxide with swelling properties of the structure provided adsorption and catalytic sites for 4-AP. The prepared electrochemical sensor displayed good Linearity in the concentration range 0.50 ~ 115.38 µM and low detection limit (LOD = 0.19 µM). The sensor also had good reproducibility and stability. The MXene/PANI/SnO 2 /GCE sensor was applied to the determination of tablets and Yellow River water, and expressed high recoveries and low relative standard deviations. Graphical
研究领域:
电化学传感
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纳米技术
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分析化学
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环境监测
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药物分析
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高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2277
·
IF 3.2
Anyi Zhang,Yiming Wang,Haidong Yu,Yabin Zhang
The advent of the Internet of Things has boosted portable and wearable miniature electronics, especially micro-supercapacitors (MSCs) with excellent integrated performance as well as high-power density and a long lifetime. However, the rational design of electrode material formulations and the construction of three-dimensional (3D) structured electrodes with scalable and cost-effective fabrication remains an arduous task for improving the energy density of MSCs to meet all industrial sector requirements, such as the mass-production of microscale structures, a lasting power supply, and safety. To address these challenges, combining the respective capacitance merits of MXenes and polyaniline (PANI), we propose a constructing strategy for the preparation of a 3D MXene@PANI hierarchical architecture consisting of one-dimensional (1D) PANI nanofibers grown on two-dimensional (2D) Ti3C2MXene nanosheets via extrusion-based 3D printing. Such a 3D architecture not only achieves a high loading mass of MSC electrodes prior to conventional planar MSCs for abundant active site exposure, but it also overcomes the restacking of MXene nanosheets accounting for sluggish ionic kinetics. These features enable the resulting MSCs to deliver excellent electrochemical properties, including a high volumetric capacitance of 1638.3 mF/cm3and volumetric energy density of 328.2 mWh/cm3. This power supply ability is further demonstrated by lighting up a blue bulb or powering an electronic thermometer. This study provides a promising design strategy of the architecture of MXene@PANI composites for high-performance MSCs with 3D printing technology.
研究领域:
材料科学
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能源存储
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纳米技术
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuqun Cai,Huanli Gao,Yifei Qu,Mengya Sun,Maolin Dong,Ziwei Sun,Dan Luo,Huiyang Bian,Hongqi Dai,Tingting Xu
TEMPO-CNF film modified by two-dimension transition metal MXene has certain antibacterial properties. However, the problem of long-lasting stability greatly restricts the feasibility of long-term use of the composite film. Here, we introduced polyaniline (PANI) as a modifying molecule, which was electrostatically adsorbed on the surface of the MXene nanosheets to prevent its self-stacking and delay its oxidation. The modified MXene could still maintain >85 % stability after 30 days of room temperature storage. The MXene-PANI nanocellulose (MXP/CNF) film was further prepared by combining electrostatic attraction and hydrogen bonding interactions. Thanks to the synergistic effects of the photothermal conversion and photodynamic of MXene and PANI themselves, as well as the high light-trapping properties of the heterostructures, the photothermal and photodynamic efficiencies of the MXP/CNF film were greatly improved. Under the irradiation of 808 nm near-infrared light at 1.5 W/cm 2 , the MXP/CNF film reached a temperature of 132.9 °C within 20 s. Meanwhile, reactive oxygen species are generated to degrade 55 % of crystalline violet by modified MXene composite film under light irradiation. Compared to 15 % bacterial survival on cellulose film not modified with PANI, S. aureus and E. coli were completely killed on MXP/CNF film under light conditions. The prepared thin film materials exhibit low cytotoxicity, highlighting their potential applications in biomedicine and desalination.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 29
·295401
·
IF 3.953
Qiangqiang Wang,Yongsheng Fang,Maosheng Cao
Micro-supercapacitors (MSCs) are considered as the promising energy supply of miniaturized electronic devices. The electrode material, as one integral part, play a crucial role on the energy storage performance of MSCs. In our work, we constructed a heterojunction in MXene-PANI@MWCNTs (MPM) ternary composite, benefitting for the synergistic enhancement effect among MXene, polyaniline (PANI) and multiwall carbon nanotubes, an outstanding specific capacitance of 414 F g−1 (at 1 A g−1) has been achieved. MPM shows high capacitance retention at large current density (86.7%, at 10 A g−1) and long-term cycling stability of 90.4% for 10 000 cycles. Furthermore, we obtained MPM self-standing films, and constructed a flexible all-solid-state MSC based on the film electrode. A competitive charge storage capability of 30.2 mF cm−2 and long-term stability of 70.2% retention for 10 000 cycles was obtained in the MSC. Meanwhile, the MSC shows excellent flexibility, maintaining most capacitance under bending conditions. Moreover, using an integrated strategy, MSCs can obtain tunable voltages and currents that meet various practical requirements. All these results indicate that the MPM is an excellent charge storage material and will become a potential candidate for flexible energy-storage devices.
研究领域:
材料科学
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能源存储
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PubMed
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ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Hui Zhi,Xiaobo Zhang,Fengya Wang,Peng Wan,Liang Feng
Flexible pressure sensors made of carbon materials have been used in electronic skins (e-skins), whose performance can be enhanced if composite sensing materials are used. Herein, an MXene/polyaniline/bacterial cellulose (MXene/PANI/BC) aerogel sensor has been fabricated through the self-assembly process between the MXene and one-dimensional active material. Combined with fewer-layer or single-layer MXenes, the as-fabricated aerogel could be used as the active layer of the pressure sensor, monitoring tiny motion signals of finger bending, wrist bending, and pulse beating. Bluetooth wireless transmission could also be realized to monitor the real-time spatial pressure distributions on the mobile phone, making the aerogel-based sensor an ideal candidate in e-skins. Meanwhile, the aerogel-based sensor is sensitive toward NH3 due to the unique three-dimensional (3D) structure of the aerogel and the abundant terminal groups (such as −O, −OH, and −F) of the MXene in the system that ensure efficient electronic transfer for the sensing process and create active sites for the absorption with the target gas. This work offers a versatile platform to develop MXenes to fabricate 3D composite aerogels for high-performance flexible multiple sensors.
研究领域:
材料科学
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传感器技术
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电子工程
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DOI
PubMed
高影响因子
Materials Today Communications
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2023
·
IF 3.8
Xianhong Zheng,Peng Wang,Binbin Ding,Jinhao Tang,Xinghua Hong,Zhi Liu,Wen Xia,Xiaoshuang Zhou,Zongqian Wang,Lihua Zou,Changlong Li
Stretchable electrical conductors hold great promise in the wearable electronic devices, such as flexible display and human-machine interface. Stable conductivity is vital for wearable devices to maintain their stable performance. However, the electrical resistance of most reported yarns dramatically increases when they are deformed. Herein, we propose a design for a coaxial-helix structure by wrapping the polyaniline/MXene-based elastic core-spun yarn on itself in the form of coils. The fabricated coaxial-helix structured yarns (DCSs) exhibit excellent strain-insensitive properties, including low relative resistance change (25.4%), large strain (200%) and high quality factor (17.95). Moreover, the DCSs can be used as the stretchable electrodes for the supercapacitors , and delivers a linear specific capacitance of 256.7 mF cm −1 , which is higher than most stretchable yarns. Therefore, the proposed coaxial-helix structure design creates a new approach for the strain-insensitive stretchable conductor, thereby paving the way for the development of stretchy electronics.
研究领域:
材料科学
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电子工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Lin Han,Yueqin Li,Chen Chen,Lingke Liu,Zichun Lu
Conducting polymer-based conductive hydrogels can offer adjustable electronic characteristics and superior mechanical performance, thus holding significant promise for flexible supercapacitors. However, some of such hydrogel electrodes still suffer from inferior stability, unsatisfactory energy density, and narrow temperature tolerance, which limit their widespread use in flexible supercapacitors. Herein, polyaniline was coated on the surface of Ti 3 C 2 T x MXene flakes by in-situ chemical oxidative polymerization of aniline monomer pre-assembled on the MXene surface. The resulting MXene/PANI conductive nanofillers, Fe 3+ ions, and phytic acid were introduced into the gelatin/polyacrylamide hydrogel scaffold to form highly stretchable MPGP-Fe y hydrogel electrodes. Benefiting from the highly electrochemical activity of MXene/PANI conductive nanocomposite, efficient redox transition of Fe 3+ /Fe 2+ , and high open structure, the assembled all-gel symmetrical MPGP-Fe y supercapacitors can achieve a maximum specific capacitance of 847 mF/cm 2 , an impressive energy density of 71.8 μWh/cm 2 , and an exceptional cyclic stability, retaining 95 % capacitance retention after 5000 cycles. The phytic acid is advantageous in lowering the freezing points of both the hydrogel electrode and electrolyte layer. The developed supercapacitors demonstrate promising temperature-adaptive properties over a wide range of −30 ∼ 90 °C. When operated at −30 °C, an impressive stable output with long-term stability of 93 % retention are achieved. With the merits of good processability, high flexibility and stretchability, the present device can serve as an optimal energy source for powering diverse electronic components in practical applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Nan Li,Tian-Jiao Lou,Wenyi Wang,Min Li,Li-Chao Jing,Zhi-Xian Yang,Ru-Yu Chang,Jianxin Li,Hong-Zhang Geng
The appearance of the composite membrane provides a new research direction for reducing membrane fouling . In this study, polyaniline (PANI) and Ti 3 C 2 T x (MXene) were combined by the electrostatic assembly method where PANI was used to adjust the distance between MXene layers and construct the conductive network. The conducting mixed ultrafiltration membranes were prepared by the non-solvent induced phase separation method, in which MXene and PANI were mixed into a polyethersulfone (PES) matrix. The permeation flux of pure water of the MXene-PANI/PES membrane was increased by 200.9%, the retention rate of bovine serum albumin (BSA) was kept above 99%, and the retention rate of Congo Red and Methyl blue dyes was 99.1% and 98.4%, respectively, this goes well beyond the PES membrane. In addition, through a series of conductivity tests, it has been proved that the conductive properties of composite membranes were greatly improved, and the conductivity of the MXene-PANI/PES composite membrane can reach 0.5 S m −1 . After applying a negative voltage to the membrane, the negative charge around the surface of the membrane repels the negatively charged contaminant under the action of an electrostatic repulsion force, thereby the enrichment of pollutants on the membrane surface can be effectively reduced, and the FRR reached 93.7%. On the basis of ensuring membrane conductivity, we improved the permeability, selective separation, and anti-fouling ability of the membrane. This research shows great potential for the efficient development of an anti-fouling conductive separation membrane based on MXene.
研究领域:
材料科学
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环境工程
·
化学工程
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Wen Long Liu,Yong Qiang Guo,Tao Lin,Hong Chao Peng,Ya Ping Yu,Fan Yang,Sheng Chen
MXene-based electrodes have shown great performance as flexible supercapacitors in the application of portable and wearable electronics. Nevertheless, 2D MXene nanosheets suffer from severe self-stacking issues during electrode preparation, which can significantly limit the charge storage capacity. Herein, a simple yet efficient strategy is developed for fabricating the supercapacitor electrode based on the MXene@PANI coated activated carbon cloth (MXene@PANI-ACC). The resulting MXene@PANI-ACC possesses 2D/0D/1D hierarchical nanostructures , where the 1D carbon fibers are uniformly coated with MXene@PANI nanocomposites and the 0D PANI nanoparticles are densely anchored on the surfaces of the 2D MXene nanosheets. This hierarchical structure can effectively tackle the restacking issue of MXene nanosheets during electrode fabrication and provide the obtained electrode with good conductivity for fast electron transfer . Benefiting from those features, this MXene@PANI-ACC electrode demonstrates an excellent area capacitance of 1347 mF/cm 2 at a current density of 1 mA/cm 2 and can retain of its original capacity at 20 mA/cm 2 after 5000 cycles. The excellent electrochemical performance highlights great promise of the developed electrode with hierarchical nanostructures for applications in high-performance energy storage devices.
研究领域:
材料科学
·
能源存储技术
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高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 6
·2262-2270
·
IF 13.3
Renjie Ding,Jinhua Xiong,Qian Yan,Zhong Chen,Zonglin Liu,Xu Zhao,Qingyu Peng,Xiaodong He
Acid rain is a worldwide problem because of the emission of acidic gases into the atmosphere, leading to the acidification of first-order streams and aggravation of fresh water shortage. Therefore, it is of great importance to develop an environmentally friendly method for removing acid from water. Herein, an advanced technology that can achieve aqueous acid purification using solar energy is realized with Ti3C2Tx MXene/polyaniline (PANI) hybrid non-woven fabrics (MPs) through interfacial solar vapor generation, with PANI acting as an acid absorber through the doping process. Benefiting from the porous structure and crumpled micro-surface of MPs, a high evaporation rate of 2.65 kg m−2 h−1 with an efficiency of 93.7% can be achieved under one-sun illumination. Moreover, MPs present an even higher evaporation rate of 2.83 kg m−2 h−1 in high concentration aqueous acid and can generate clean water with a pH higher than 6.5. More importantly, thanks to the unique reversible doping process of PANI, when used as an aqueous acid purifier, MPs show good stability and reusability after dedoping. Our work sheds light on an efficient strategy for dealing with aqueous acid and acid rain.
研究领域:
环境科学
·
材料科学
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Jiahui Zheng,Bochao Ma,Xiaoqing Cui,Rui Wang,Li An,Bin Guo,Hongyan Zhang
Detecting ammonia (NH 3 ) is crucial for both the atmospheric environment and human health. However, developing low-cost, high-sensitivity, and flexible sensors for NH 3 is a significant challenge. Herein, we report a flexible, electrode-free NH 3 sensor based on an ink of polyaniline-covered MXene and multi-walled carbon nanotubes (MXene@PANI-MWCNTs), which was developed on cotton fabric using a dispensing print method. After optimizing the MXene@PANI-MWCNTs concentration, the number of sensor arms and the printed layers, the sensor exhibited a high response in the range of 0.5–25 ppm and can detect as low as 0.5 ppm NH 3 at 40% relative humidity (RH), room temperature (25°C). The response values were significantly higher than those for other interfering gases including H 2 , CO, H 2 S, and NO 2 . Furthermore, the sensor demonstrated excellent mechanical stability, with its response dropping by only 3.7% after 1000 bending cycles. When covered with expanded polytetrafluoroethylene (e-PTFE) film, the sensor showed stable performance in the ranging of 30%–90% RH at 25°C. Additionally, MXene@PANI-MWCNTs ink was printed on masks to detect NH 3 levels in breath, offering potential for medical diagnostics and personal health monitoring.
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高影响因子
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