LANGMUIR
·
2023
·
IF 3.9
Qing Qing,Xian-ying Shi,Shao-zhong Hu,Liang Li,Ting Huang,Nan Zhang,Yong Wang
Increasing environmental problems intensify the demand for high-performance environmental purification materials. MXene is a typical transition-metal carbide/nitride material with a two-dimensional geometric feature and a good deal of functional groups, and it is considered as an efficient adsorbent for removing pollutants from wastewater. However, the easy oxidation and relatively low adsorption capacity greatly restrict its application. In this study, the MXene/polydopamine (PDA) composite particles were fabricated through the biomimetic modification method of inducing the self-polymerization of dopamine in an MXene aqueous solution. Microstructure characterizations demonstrate that PDA facilitates the exfoliation of MXene. Adsorption measurements show that MXene and PDA exhibit an apparent synergistic effect in removing chromium hexavalent Cr(VI) from aqueous solution, and more PDA content leads to a larger synergistic effect. Consequently, the composite particles exhibit an ultrahigh adsorption capacity (862.3 mg/g). Specifically, even if the composite particles were stored in aqueous solution for 2 months, they still exhibit high adsorption ability with only a 3.3% loss in adsorption capacity, indirectly confirming the enhanced stability of MXene induced by PDA. Furthermore, the composite particles also show reduction ability to Cr(VI) and about 54.3% Cr(VI) can be reduced to harmless chromium trivalent Cr(III). This study provides a new method for the preparation of MXene-based adsorbents with excellent adsorption capacity and high stability, which has broad application prospects in the field of wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 3
·1-9
·
IF 20.1
Xu Ting,Wang Yaxuan,Liu Kun,Zhao Qingshuang,Liang Qidi,Zhang Meng,Si Chuanling
With the depletion of fossil resources and the gradual intensification of environmental pollution, green and sustainable electrochemical devices have aroused intensive attraction. The supercapacitor, demonstrating fast charging rate, high power densities, and long cycling life, has great application prospects in high power output and backup power supply. Herein, an ultralight and robust MXene/carbon nanotube aerogel is constructed by facile directional freezing and subsequent freeze-drying. Benefiting from the strongly π-π interactions between MXene nanosheets and carbon nanotube, the assembled MXene/carbon nanotube composite aerogel exhibits abundant pore structures, superior conductivity, and good mechanical properties. The electrical conductivity of MXene/carbon nanotube aerogel is up to 1600 S m −1 . The MXene/carbon nanotube aerogel can be subjected to 70% compressive strain and retain 85% initial strain over 1000 compress-release cycles. The as-prepared all-solid-state supercapacitor with MXene/carbon nanotube aerogel shows outstanding electrochemical performance (410.7 mF cm −2 at the current density of 0.8 mA cm −2 ). The supercapacitor is flexible and can be bent from 0 to 90° as the cyclic voltammetry curves are almost consistent. Furthermore, the LED can be lighted by four devices in series.
研究领域:
材料科学
·
能源技术
·
纳米科技
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产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2024
·
IF 2.5
Cansen Liu,Qingmei Chen,Canhai Cai,Jianyu Xu
Developing ecofriendly anticorrosion coating has great demand for marine protection. Incorporation of nontoxic inorganic fillers into waterborne epoxy (WEP) coating shows tremendous potential for enhancing corrosion resistance. However, the application of MXene/WEP coating is limited by the poor dispersion of MXene in WEP and insufficient corrosion resistance. Herein, a polydopamine (PDA) modified MXene-CeO 2 @PDA (MCP) filler is constructed by a combination of CeO 2 with MXene and embedded into WEP to form ecofriendly anticorrosion MCP/WEP coating. Dispersion of MXene in WEP is improved by the introduction of CeO 2 and PDA modification. Benefiting from the synergy of the physical labyrinth effect of MXene and the chemical inhibition effect of CeO 2 , MCP/WEP coating exhibits remarkable anticorrosion behavior in 3.5 wt% NaCl solution with a low corrosion rate (CR) of 4.48 × 10 −6 mpy, which is three orders of magnitude lower than that of blank WEP (4.78 × 10 −3 mpy). Moreover, MCP/WEP presents long-term and stable corrosion protection for over 30 days. The results reveal the incorporation of MCP significantly promotes the anticorrosion performance of WEP.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Tianqi Hou,Yushun Zhao,Lijian Ding,Cheng Yan,Guanglei Wu,Bin Du,Zhiyi Liu,Minghao Wei
Although aviation tools provide many conveniences to our lives, lightning has always been a significant factor affecting the safety of aviation activities. Nevertheless, designing a diverter strip with both favorable conduction current capability and remarkable environmental stability remains a great challenge. Here, a room temperature vulcanized silicone rubber (RTV) encapsulated Ti 3 C 2 T x /Cu nanowire composite with a stacked structure is reported. Specifically, the assembly of nanowires and nanosheets behaves as an enhanced conductive network, and the encapsulation of RTV gives the film excellent environmental stability. The results show that Cu NWs loading at 10 % the composites can form effective discharge paths along the surface at output voltages of 96.48 and 201.6 kV. Furthermore, the composites exhibit excellent hydrophobicity (water contact angle of 108.09°) and lightweight properties (2.65 g/cm 3 ). Overall, the composite material provides a promising design strategy for the preparation of new shunts that can be applied under realistic conditions.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 33
·21600-21608
·
IF 4.036
Jinxin Cao,Yuru Wang,Bingqing Wei,Jiaxin Ye,Qing Zhang
Changing the morphology of two-dimensional materials often offers an efficient and effective means to exploit their electronic and mechanical properties. Two-dimensional materials such as graphene can be scrolled into one-dimensional fibers via simple sonication. Unfortunately, scrolling MXene nanosheets into fibers is quite challenging, especially Ti3C2Tx composed of three layers of titanium atoms and two layers of carbon atoms. Herein, we report a new method to fabricate MXene fibers via ascorbic acid (AA) induced scrolling of Ti3C2Tx nanosheets. An unusual AA-Ti3C2Tx interaction is discovered in that intercalated AA molecules bind to and interact with the Ti3C2Tx surface in the form of a hydrogen bonding-bonded assembly instead of as individual molecules, and a sheet-scrolling mechanism is proposed based on this interaction. The as-obtained MXene fibers exhibit a compact cross-section, and the diameter can be tailored from hundreds of nanometers to several micrometers through tuning the MXene/AA ratio. Moreover, the storage modulus of the MXene-fiber sponge attains its maximum value of ∼1 MPa when a unique morphology comprising both fibers and not-yet-scrolled sheets is presented. This work offers a new strategy of fiber-shaping MXenes for applications in structural composites and flexible electronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Huihuang Shen,Junjun Wang,Huabo Huang,Jiayou Ji,Liang Li
The absorption of microwaves is significantly influenced by the structure of the absorber. Typically, the electromagnetic parameters can be adjusted by modifying the structure of the absorber. In this work, a novel approach is proposed to enhance microwave absorption properties by adjusting the impedance matching of MXene nanosheets. MXene/PPy hybrids with loose lamellar structure are synthesized through self-assembly of positively charged polypyrrole (PPy) and MXene nanosheets with negative charges, facilitated by electrostatic and hydrogen-bonding interactions. The impact of polymorphic PPy on the electromagnetic parameters and microwave absorption properties of MXene nanosheets is comprehensively explored. It is found that the addition of PPy with different morphologies can effectively tune the electromagnetic parameters of the MXene nanosheets. Particularly, the microwave absorption capabilities are significantly enhanced when PPy nanopaperclips are uniformly adsorbed on the surface of the MXene nanosheets. This enhancement is attributed to the favorable impedance match between PPy nanopaperclips and MXene nanosheets along with the exceptional attenuation capabilities of PPy. A minimum reflection loss (RLmin) of −47.85 dB is achieved at an ultrathin matched thickness of 1.6 mm, and the maximum effective absorption bandwidth (EABmax) is 5.01 GHz at 1.9 mm for the prepared MXene/PPy nanopaperclip hybrid with a filling rate of 20%. Furthermore, a bandwidth with 99% absorption efficiency of 15.4 GHz (2.4–18.0 GHz) can be attained when the thickness of the absorber ranges from 1.6 to 10.0 mm. It is anticipated that this work will provide valuable insights for the manufacture of high-performance microwave absorbers.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ruoyang Sun,Yumeng Xia,Mengyuan Peng,Yinghui Wang,Jinming Zhang,Qingtao Liu,Shouwei Zhang,Jinfeng Wang
Osmotic energy is a clean and renewable alternative resource to non-renewable fossil fuel. Harvesting this “blue” energy typically required ion-selective membranes. Two-dimensional (2D) materials are ideal scaffolds for constructing nanofluidic ion-selective membranes in osmotic energy conversion. However, the 2D membranes were often fragile and instable in solutions because of the weak van der Waals interactions between two-dimensional nanosheets. Here, stable MXene nanofluidic membranes were constructed by incorporating cellulose nanofiber (CNF) in MXene. The CNF was used as binder to enhance the mechanical stability in solutions. The resulted MXene/CNF membranes were investigated in terms of structure, ion selectivity and osmotic energy generation. The results showed that the MXene/CNF membranes exhibited excellent cation selectivity due to the negative charged carried by MXene and CNF, benefiting the osmotic energy conversion. The maximum power output density reached up to 1.32 and 0.338 W m −2 at 1000-fold KCl and 50-fold NaCl concentration gradient, respectively. Moreover, this MXene/CNF energy generator exhibited a long-term output stability. This work demonstrated the great potential of nanofluidic generators based on the two-dimensional material and the biomass material cellulose for osmotic energy conversion processes.
研究领域:
能源材料
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 22
·2200646
·
IF 15.153
Yanhua Zhu,Xinfeng Tang,Qian Liu,Yujian Xia,Xingwu Zhai,Hui Zhang,Delong Duan,Hang Wang,Wenqi Zhan,Liang Wu,Nan Zheng,Weifu Lv,Yucai Wang,Min Zhou
Photothermal therapy (PTT) as a noninvasive hyperthermia exhibits high potential for anti-cancer treatments. The explosion of efficient photothermal agents (PTAs) keeps developing rapidly. MXene stands out due to its intriguing structures, fantastic photodynamic properties, and good biocompatibility. However, the potential of MXenes has not been sufficiently explored in PTT. Its versatile chemical compositions of MXenes provide vast opportunities to discover new candidates. Considering that the metallic feature is mainly attributed to the metal element, anionic modulation may open a distinct avenue to propel efficient PTAs with metallic nature, which is expected for high light-harvesting over near-infrared (NIR)-I and NIR-II. As a paradigm, metal carbonitride is chosen to visualize the influences of anionic modulation. Taking advantage of electron injection from nitrogen, the distinct carbonitride Ti 3 C 1.15 N 0.85 F 0.88 O 0.56 (OH) 0.56 exhibits a strong NIR absorption (36.6 L g −1 cm −1 at 808 nm, 43.5 L g −1 cm −1 at 1064 nm), resulting in efficient photonic hyperthermia against tumors in vitro and in vivo. Looking through a large family of MXenes, this proof-of-principle demonstration offers a deep understanding between atomic composition and physicochemical properties, which further solidifies MXenes with all the potential for biomedical applications.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Yuewei Li,Shuqiang Peng,Ranjith Kumar Kankala,Lixin Wu,Ai-Zheng Chen,Shi-Bin Wang
Despite the advantages and success in many fields, most elastomers currently fail to meet specific application requirements owing to their poor mechanical properties and limitations in the manufacturing of complex structures. 3D printing has emerged as an attractive manufacturing process for building a variety of complex structures for custom-configured elastic devices. In this study, we demonstrate the fabrication of elastic nanocomposites based on encapsulating 3-(trimethoxysilyl)propyl methacrylate-modified MXene nanosheets in a photocurable polyurethane acrylate resin (PAR) matrix by digital light processing 3D printing. The mechanical properties of the elastomers are tuned by varying the MXene amount in the PAR. The prepared MXene-PAR nanocomposites containing 0.1% w/w fillers exhibit a tensile strength and elongation at a break of 23.3 MPa and 404.3%, corresponding to an increase of 100.8% and 37.8%, respectively, as compared to the control. Piezoresistive sensors and wearable finger guard sensors are fabricated by coating a MXene-based hydrogel on the surface of the 3D-printed structural parts to determine the printability, mechanical properties, and conductivity. Furthermore, the as-prepared stretchable sensors exhibit long-term working stability. Together, our findings provide a new paradigm for the overall design of 3D-printed elastomers with excellent mechanical properties, which are anticipated to expand the scope of 3D printing.
研究领域:
材料科学
·
制造工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMPHYSCHEM
·
2023
·Vol. 24
·期 17
·e202300187
·
IF 2.9
Aleksandr Aglikov,Olga Volkova,Anna Bondar,Ivan Moskalenko,Alexander Novikov,Ekaterina V. Skorb,Evgeny Smirnov
Graphical MXene flakes were incorporated into polyelectrolyte multilayers and used as active media for memristive devices. The memristors were produced by layer-by-layer assembly through dipping into the corresponding solutions. The current difference between high and low resistive state were measured as two orders of magnitude. DFT calculations were applied to rationalize the observations. The emerging novel class of two-dimensional materials – MХenes – have attracted significant research attention. However, there are only few reports on using the most prominent member of the MXene family, Ti 3 C 2 T x , as an active material for memristive devices within a polyelectrolyte matrix and its deposition on inert electrodes like ITO and Pt. In this study, we systematically investigate Ti 3 C 2 T x MXenes synthesized with two classical delamination agents, such as lithium chloride and tetramethylammonium hydroxide, to identify the most suitable candidate for memristive device applications. The characteristics of memristors based on the hybrid structures consisting of MXene−polyelectrolyte multilayers, specifically polyethyleneimine (PEI) and poly(sodium 4-styrenesulfonate) (PSS) are explored. The PEI(MXene)/PSS memristor exhibits a voltage threshold (V SET/RESET ) range of 1.5–2.0 V, enabling the transition from a high-resistive state (HRS) to a low-resistive state (LRS), along with a significant current switching ratio of approximately two orders of magnitude. The observed V SET/RESET difference of approximately 4 V is further supported by density functional theory (DFT) calculated redox potential. These findings underscore the potential of polyelectrolyte-based memristors, such as the in PEI−Ti 3 C 2 T x −PSS system, in facilitating the development of highly functional, self-assembled memristive devices with diverse applications.
研究领域:
材料科学
·
电子工程
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Weizhun Jin,Linhua Jiang,Lin Han,Haimeng Huang,Jianfeng Zhang,Mingzhi Guo,Yue Gu,Fangfang Zhi,Zhiyou Chen,Guohui Yang
New nanofluids based on graphene (GR) and GR/MXene were prepared to enhance the thermal conductivity. The thermal conductivity and viscosity of nanofluids at various temperatures in the 5–60 °C range were tested, and their stability was investigated by zeta potential and visual observation. The thermal performance of the nanofluids was evaluated through numerical simulation analysis. The results demonstrate that MXene can effectively improve the dispersion stability of GR nanofluids. The nanofluid with 2.0 wt% GR at 60 °C exhibited the maximum thermal conductivity enhancement (65.34%) but also the maximum viscosity increment (70.69%). With the addition of MXene, the high thermal conductivity of nanofluids was maintained while the viscosity significantly decreased. GR can greatly improve the heat transfer efficiency of nanofluids, and the temperature at the monitoring point resulted from 2.0 wt% GR decreased by 9.19 ℃ compared to water. The heat transfer efficiency of GR/MXene nanofluids was almost identical to that of GR nanofluids.
研究领域:
材料科学
·
热力学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sensor Research
·
2023
·
IF 0
Tianqing Liu,Danyao Qu,Lihao Guo,Gandong Zhou,Guangjian Zhang,Tao Du,Weiwei Wu
Human respiration reflects abundant physiological information and could enable non-invasive monitoring, providing information about various biological parameters such as respiration rate and depth. The rapidly growing field of humidity sensors bring forward the requirement for good performance. In this work, by virtue of good hydrophilicity and conductivity, a MXene/thermoplastic polyurethane (TPU) composite film is prepared by coating MXene nanosheets on chitosan-modified TPU electrospun nanofibers via electrostatic interactions, for fabricating a humidity sensor. Based on the principle that the tunnel resistance changing with water molecules influences the distance of MXene nanosheets, the MXene/TPU humidity sensor exhibits fast response (12 s), wide humidity response range (11–94% RH), low hysteresis (<7% RH), and excellent repeatability. The humidity sensor can be assembled with a face mask for distinguishing different human respiration patterns and accurately monitoring respiratory signals during different physical activities, suggesting its promising applications in the fields of respiratory monitoring.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
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