ACS Nano
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2017
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IF 13.942
Jianmin Luo,Wenkui Zhang,Huadong Yuan,Chengbin Jin,Liyuan Zhang,Hui Huang,Chu Liang,Yang Xia,Jun Zhang,Yongping Gan,Xinyong Tao
Two-dimensional transition-metal carbide materials (termed MXene) have attracted huge attention in the field of electrochemical energy storage due to their excellent electrical conductivity, high volumetric capacity, etc. Herein, with inspiration from the interesting structure of pillared interlayered clays, we attempt to fabricate pillared Ti3C2 MXene (CTAB–Sn(IV)@Ti3C2) via a facile liquid-phase cetyltrimethylammonium bromide (CTAB) prepillaring and Sn4+ pillaring method. The interlayer spacing of Ti3C2 MXene can be controlled according to the size of the intercalated prepillaring agent (cationic surfactant) and can reach 2.708 nm with 177% increase compared with the original spacing of 0.977 nm, which is currently the maximum value according to our knowledge. Because of the pillar effect, the assembled LIC exhibits a superior energy density of 239.50 Wh kg–1 based on the weight of CTAB–Sn(IV)@Ti3C2 even under higher power density of 10.8 kW kg–1. When CTAB–Sn(IV)@Ti3C2 anode couples with commercial AC cathode, LIC reveals higher energy density and power density compared with conventional MXene materials.
研究领域:
材料科学
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电化学储能
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Daozheng Yang,Bing Zhou,Gaojie Han,Yuezhan Feng,Jianmin Ma,Jian Han,Chuntai Liu,Changyu Shen
Flexible transparent heaters based on photothermal energy conversion are highly desired for next-generation electronic devices. However, how to balance the photothermal conversion efficiency and transparency is still a huge challenge. In this work, we demonstrate a flexible polycarbonate (PC) film with balanced photothermal energy conversion performance and transparency obtained from the spraying polypyrrole (PPy)-modified Ti3C2Tx MXene (MXene@PPy) layer. Due to the synergistic light-to-heat effects of MXene and the attached PPy nanoparticles, the resulted transparent film heater (MP-PC) can obtain a satisfying photothermal conversion performance (47.5 °C at 100 mW/cm2) at a low spraying density of MXene and thus show an effective transmittance of 51.61%, simultaneously. Moreover, the photothermal conversion performance reveals an outstanding stability without significant deterioration after exposing to an outdoor environment for seven months. Besides, arising from the excellent surface electrical resistance (413 Ω/sq), the MP-PC film also exhibits an effective Joule heating capacity with a high heating temperature of 108 °C at 24 V input voltage. As one of the promising applications, the MP-PC film exhibits the effectiveness and feasibility as a light-triggered thermal therapy film for human skin in cold environments.
研究领域:
材料科学
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能源技术
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生物医学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
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IF 8.097
Xinliang Li,Xiaowei Yin,Hailong Xu,Meikang Han,Minghang Li,Shuang Liang,Laifei Cheng,Litong Zhang
Two-dimensional (2D) few-layered Ti3C2TX MXene (f-Ti3C2TX) has been proved to be one of the most promising electromagnetic interference (EMI) materials, but its electromagnetic (EM) absorption properties and loss mechanism have not been studied so far. Herein, for the first time, ordered lamellar f-Ti3C2TX/SiCnws hybrid foams with ultralow density are synthesized by a combination of self-assembly and bidirectional freezing processes. The freestanding foams exhibit excellent EM absorption properties superior to most of the current foam-based counterparts. The effective absorption bandwidth is always able to cover the whole X-band, when the sample thicknesses of f-Ti3C2TX/SiCnws hybrid foams distribute in any value between 3.5 and 3.8 mm, and the minimum reflection coefficient reaches −55.7 dB at an ultralow density of only about 0.029 g·cm–3. The fundamental mechanism associated with optimized impedance matching, enhanced polarization loss, and conductive loss is discussed in detail. Our results evidence that 2D flexible f-Ti3C2TX MXene has great potential in EM absorption field like graphene.
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyang Zhang,Yanting Wang,Xuefei Zhang,Ching-Wen Lou,Jia-Horng Lin,Ting-Ting Li
Nano-hydroelectric generators that use abundant water resources to convert them into electricity are urgently needed to develop renewable energy supplies and alleviate the energy crisis. Inspired by the phenomenon that plants in nature rely on the bark to transport water from the roots to the branches and leaves, in this study we mimic the structure of Ginkgo bark by loading CNT-OH and Ti 3 C 2 T x MXene nanosheets onto cotton fabric using a simple in situ polymerization method to construct a nanogenerator with high capillary core wicking rate. A single CMTEPG (3 cm × 10 cm) achieves open-circuit voltage and short-circuit current of 0.36 V and 520 μA, respectively, in a simulated seawater (3.5 wt% NaCl) solution. By connecting different numbers of device units in series in a simulated seawater solution, it is possible to light small red LED bulbs and drive blue LED displays. In addition, the flexible generator shows excellent mechanical stability, and the optimized generator achieves an actual output power of 46.63 μW.
研究领域:
材料科学
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能源技术
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仿生学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Qi Fan,Mengjiao Yi,Chunxiao Chai,Wenwen Li,Ping Qi,Jihui Wang,Jingcheng Hao
Hypothesis Stemming from their unique superiorities, Ti 3 C 2 -MXenes have emerged as versatile 2D materials for a myriad of appealing applications. However, two crucial issues are detrimental to maximize the inherent properties of MXenes for further specific developments, i.e. restacking problem and environmental instability. Experiments Herein, we develop an effective strategy, constructing water-in-ionic liquid (W/IL) Pickering emulsions with further polymerization of the continuous phase, to fabricate oxidation stability enhanced Ti 3 C 2 -MXene based porous materials. It is the first time to utilize a brand new platform between the immiscible IL and water for MXene nanosheets to assemble with guest species serving as building blocks for macromonoliths. Findings The prepared porous materials can provide elastic hollow-sphere structures derived from emulsion template, for wearable piezoresistive sensor with high sensitivity, excellent accuracy and favorable reproducibility. Intriguingly, ILs as dispersion and surface modification with polymeric ionic liquids (PILs) play indispensable roles in ameliorating oxidation stability of MXenes in porous materials, by virtue of quenching reactive oxygen species (ROS) and forming protective layer through the capping effect. Furthermore, the processed aerogels after supercritical drying can selectively absorb several organic solvents owing to their high hydrophobicity , abundant porosity and sufficient mechanical strength . All results indicate that the innovative strategy can simultaneously circumvent two major drawbacks of MXenes for the first time, and shed light on the opportunity to further enrich their practical applications by constructing multifunctional platform.
研究领域:
材料科学
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纳米技术
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环境科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
Journal of Advanced Dielectrics
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2020
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IF 0
Maomao Ju,Yawei Yang,Jianqiu Zhao,Xingtian Yin,Yutao Wu,Wenxiu Que
Interfacial water evaporation through solar heating with photothermal materials is a promising strategy for seawater desalination and wastewater purification. Tightly packed 2D membranes with high reflection losses and limited vapor escape channels result in a low evaporation rate. In this work, 3D MXene architecture was fabricated by dropping the delaminated Ti 3 C 2 ( d -Ti 3 C 2 ) nanosheets onto the carbonized melamine foam (CMF) framework. Owing to the macroporous 3D architecture, more effective broadband solar absorption and vapor escaping were achieved. As a result, the 3D CMF@ d -Ti 3 C 2 -based evaporator delivers a water evaporation rate of 1.60 kg/m 2 ⋅ h with a solar-to-vapor conversion efficiency of up to 84.6%.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
COMPOSITES PART B-ENGINEERING
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2020
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IF 7.635
Yang Dai,Xinyu Wu,Zhangshuo Liu,Hao-Bin Zhang,Zhong-Zhen Yu
The increasingly severe electromagnetic pollution calls for high-performance microwave absorption materials . Lightweight, robust and porous MXene/polyimide (MP) aerogels with reversible compressibility , anisotropic pressure sensitivity and microwave absorption performances are fabricated by interface-reinforcement and bidirectional-freezing approach. The interfaces between MXene sheets are effectively reinforced by incorporated polyimide while anisotropic wave-like lamellar architectures are constructed during the bidirectional-freezing process due to the generated dual temperature-gradients. The highly anisotropic aerogel exhibits obvious higher mechanical strength and electrical conductivity along the lamella direction, but better elasticity and less energy dissipation in the normal direction. The reversibly compressible porous MP architecture not only delivers steady and repeatable electrical resistance response, but also presents long-term discernible direction-dependent pressure sensitivity for 1000 loading-release cycles at a strain of 50%. The anisotropic and porous architecture benefits microwave absorption. The structure optimization yields tunable effective absorption bandwidth (EAB) in a range of 3.9–18 GHz. Particularly, the MP aerogel shows the best EAB of 6.5 GHz for reported MXene-based microwave absorbers at only 1.91 mm, and the EAB covers the whole X-band for an aerogel with a thickness of 2.57 mm. These promising characteristics make the interfacially reinforced anisotropic MXene aerogels applicable for wearable piezoresistive devices and microwave absorbing materials.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Qijun Tang,Peiyao Xiong,Haiqiang Wang,Zhongbiao Wu
Photocatalytic CO 2 reduction to produce value-added products is considered a promising solution to solve the global energy crisis and the greenhouse effect. In this study, Ti 3 CN MXene was synthesized using a Lewis acidic etching method without the usage of toxic hydrofluoric acid (HF). Ti 3 CN MXene was then used as a support for the in situ hydrothermal growth of TiO 2 and Ru nanoparticles. In the presence of 0.5 wt% Ru, Ru-Ti 3 CN-TiO 2 shows CO and CH 4 production rates of 99.58 and 8.97 μmol/g, respectively, in 5 h under Xenon lamp irradiation, more than 20.5 and 9.3 times that of commercial P25. The enhancement in photocatalytic activity was attributed to the synergy between the in-situ growth of TiO 2 on Ti 3 CN MXene and Ru nanoparticles. It was proven experimentally that Ti 3 CN MXene can provide abundant pathways for electron transfer. The separation and transfer of the photo-induced charge were further increased with the help of Ru and Ti 3 CN MXene, leaving more electrons to participate in the subsequent CO 2 reduction reaction. We believe that this work will encourage more attention to designing environment-friendly MXene-based photocatalysts for CO 2 photoreduction using the non-HF method.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Jie Yang,Chen Wang,Liyuan Liu,Hongli Zhang,Jianhua Ma
Flexible and wearable pressure sensors have gained great popularity in consumer electronics due to their potential applications in human healthcare, E-skin, and artificial intelligence interactions. MXene is regarded as one of the most ideal candidate sensing materials due to its high electrical conductivity and controllable interlayer space. However, the easy-to-oxidize characteristic of MXene materials greatly restricts the sensitivity and reliability of sensor devices, especially in wet climates. Herein, a highly sensitive and waterproof flexible pressure sensor using a free-standing hydrophobic bacterial cellulose/Ti3C2Tx MXene (HBT) hybrid film as a sensing layer is fabricated by facile and effective nanocellulose intercalation and fluorine modification strategies. The obtained pressure sensor delivers high sensitivity (65.5 kPa–1), fast response (50 ms), wide linear sensing range (0.002–30 kPa) with a low detection limit of 0.57 Pa, and excellent repeatability over 50,000 cycles. Meanwhile, owing to the highly hydrophobic surface of the HTB film, the outstanding sensing features could be well retained, although immersed in water several times. Benefiting from the excellent sensing properties and water resistance, the HBT sensor serves as a wearable force sensor to monitor the full-range human physiological motions regardless of whether the conditions are normal or wet. This work provides a new pathway to design the MXene pressure sensor with high reliability and demonstrates the promising usage of HBT sensors in portable biomedical electronics.
研究领域:
生物医学工程
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材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Jiana Hu,Caiyun Liang,Jiadong Li,Chuanwei Lin,Yongjiu Liang,Dewen Dong
Electromagnetic interference (EMI) shielding materials are highly necessary to solve the problem of electromagnetic radiation. Transition-metal carbide/nitride (MXene) materials offer great potential for the construction of high-performance EMI shields because of their high electrical conductivity and versatile surface chemistry. However, MXene generally suffers from poor mechanical and oxidation-resistant properties, which hinders its practical applications. Herein, flexible, strong, and hydrophobic sandwich-structured composite films (H-S-MXene), consisting of a conductive MXene layer and supporting aramid nanofiber layer, were fabricated using step-by-step vacuum-assisted filtration and dip coating. Given the unique sandwich structure, hydrogen bonding interactions, and covalent cross-linking of the MXene sheets, the H-S-MXene composite films demonstrated simultaneously excellent EMI shielding and mechanical properties. The EMI shielding effectiveness of the H-S-MXene composite film with 20 wt % MXene content reached 46.1 dB at thickness of 23.2 ± 0.5 μm, and the tensile strength of the film reached 302.1 MPa, which outperformed other reported EMI shielding materials. The excellent mechanical flexibility and hydrophobicity of the H-S-MXene composite films ensured a stable EMI shielding performance, which could withstand cycled bending, torsion, and exposure to aqueous environments. These impressive features made the H-S-MXene composite films promising candidates for electronic devices and aerospace. This study provides important guidance for the rational design of stable MXene-based composites with advanced properties.
研究领域:
材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
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.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 8
·2201425
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IF 3.6
Lingling Liu,Hongdie Yin,Wei Guo,Bi Jia,Hanmei Jiang
Ti 3 C 2 T x MXene is one of the most promising electrode materials for supercapacitors, but it often suffers in poor experiment gravimetric capacitance, which limits practical applications in industry needs. Herein, etched Ti 3 C 2 T x MXene with high gravimetric capacitance is prepared by chemical etching of MXene with concentrated alkaline solution. The intercalation of K + and the scissor role of OH − can simultaneously enlarge the interlayer spacing and cut the size of sheets, which lead to the high active-site concentration and cation diffusion. As a result, the etched Ti 3 C 2 T x MXene displays high gravimetric capacitance of 368.1 F g −1 at 2 A g −1 and outstanding cycling stability without capacitance loss over 5000 cycles at 6 A g −1 ,and the surface capacitance contribution in etched Ti 3 C 2 T x MXene occurs to a greater extent compared with the pristine MXene. Moreover, the effect of chemical etching on the supercapacitor performance and energy-storage mechanism indicates that the active-size concentration and cation diffusion could be maximized when the chemical etching conditions are appropriate, leading to the highest performance of etched Ti 3 C 2 T x MXene. Herein, it is demonstrated that the chemical etching approach is applicable to design MXenes with high gravimetric capacitance to maximize their potential applications in energy-storage applications and other fields.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）