SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Fenglei Liu,Linkai Si,Baowei Hu
Herein, we proposed a novel chitosan-induced self-assembly strategy to construct three-dimensional magnetic MXenes/chitosan composites to eliminate U(VI)/Cr(VI). Spectroscopic analysis elucidated that the magnetic composites exhibited a three-dimensional network structure, and the abundant –OH and –NH 2 groups played a pivotal role in boosting elimination performance of the composites. Batch experiment demonstrated that the synergistic effect of the amino and hydroxyl groups contributed greatly to adsorption, and the maximum adsorption capacity of U(VI) and Cr(VI) was up to 106.2 and 83.1 mg/g, respectively. Meanwhile, the kinetic studies showed that an obvious transition between diffusion control and mass transfer control, and the adsorption behavior was endothermic and spontaneous. Furthermore, a comprehensive synergistic adsorption mechanism was proposed based on the systematic spectra analysis. Namely, the target contaminant was rapidly immobilized on the 3D composites via electrostatic interaction, then the U(VI) was complexed with the amino groups, while a part of Cr(VI) was reduced to Cr(III) by the hydroxyl groups. Thus, this study not only paved the way for mitigating the increasing heavy metal/radionuclide contamination, but also promoted the application of MXexes-based materials in the field of environmental remediation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Xinliang Li,Mian Li,Kan Luo,Yue Hou,Pei Li,Qi Yang,Zhaodong Huang,Guojin Liang,Ze Chen,Shiyu Du,Qing Huang,Chunyi Zhi
Dendrite growth and low Coulombic efficiency caused by uneven diffusion and electrodeposition of Zn2+ ions have emerged as a barrier to exploit the Zn metal anode. In this work, we demonstrate the stoichiometric halogenated MXenes (Ti3C2Cl2, Ti3C2Br2, and Ti3C2I2) as an artificial layer that can induce the uniform Zn deposition. The efficient redistribution effect results from the coherent heterogeneous interface reconstruction and regulated ion tiling by halogen surficial termination. The synergetic effects of high lattice matching (90%) between the adopted MXenes and Zn, as well as the positive halogen regulation, Zn2+ ions are guided to nucleate uniformly on the most extensive (000l) crystal plane of the MXene matrix and grow in a planar manner. In terms of Zn ion regulation, Cl termination is found to be more effective than O/F, Br, and I due to its moderate adsorption and diffusion coefficiency for Zn2+ ions. The Ti3C2Cl2–Zn anode achieves a life extension of over 12 times (840 h at 2 mA cm–2//1 mAh cm–2) over that of the bare Zn anode and serves more than 9000 cycles in a battery with a Ti3C2I2 cathode at a high rate of 3 A g–1. Given the abundance of lattice parameters and terminations of MXene materials, the developed strategy is expected to be extended to other metal anode systems.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Muhammad Chhattal,Andreas Rosenkranz,Yu Kaihuan,Philipp G. Grützmacher,Zhenbin Gong,Junyan Zhang
Due to the long-standing use of MAX phase materials since the 1960s and the emergence of MXenes in 2011, both are celebrated for their extraordinary mechano-tribological properties, including layered structures, high mechanical strength , and thermal conductivity . Nevertheless, there remains a crucial research gap in comprehensively comparing their tribological performance under solid lubrication , underscoring the need for an in-depth investigation. To close this research gap, we deposited MAX phase and MXene coatings by spray-coating on stainless-steel substrates. Subsequently, we evaluated their tribological properties, deciphered the underlying mechanisms using linear-reciprocating tribometry and high-resolution material characterizations. Our results demonstrated that the MXene coatings surpass the MAX phase coating in friction reduction by 81.82 %. In terms of wear depth, MXene coating has shown a notably reduced depth compared to both the reference steel sample and the MAX phase coating. Advanced tribochemical analysis indicates that MXenes' superior tribological performance is endorsed by their ability to form a thick, patchy-like transferlayer on the counterbody, which results from their ability to shear and delaminate under acting contact stress. Our study offers a framework for future investigations into utilizing MXene-based materials in tribological applications.
研究领域:
材料科学
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摩擦学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 40
·24698-24708
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IF 3.108
Youbing Li,Xiaobing Zhou,Jing Wang,Qihuang Deng,Mian Li,Shiyu Du,Young-Hwan Han,Jaehyung Lee,Qing Huang
A novel family of Ti3C2Tx/ferrite composites with high reflection loss was developed using a facile in situ co-precipitation method. The as-synthesized Ti3C2Tx/ferrite composite with a 5 wt% Ti3C2Tx MXenes loading exhibited high reflection loss (−42.5 dB) at 13.5 GHz. The effective absorption bandwidth of the 5 wt% Ti3C2Tx/Ni0.5Zn0.5Fe2O4 composite reached ∼3 GHz (12–15 GHz) in the K-band. The incorporation of Ti3C2Tx MXenes improved the electromagnetic impedance of the Ti3C2Tx/Ni0.5Zn0.5Fe2O4 composite resulting from the enhanced electrical conductivity. The potential electromagnetic wave absorption mechanisms were revealed, which may contain magnetic loss, dielectric loss, conductivity loss, multiple reflections, and scattering. The technique is facile, fast, scalable, and favorable for the commercialization of this composite. This study provides a potential way to develop EM wave absorbing materials for a large family of MXenes/ferrite composites.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2025
·
IF 22
Jikai Zhang,Yi Tao,Yuxuan Ye,Haiyang Wang,Xinping Wu,Zicheng Luo,Yu Shi,Qi Zhao,Zongju Cheng,Yu Guo,Bin Li,Bo Mai,Qinyou An,Xiansheng Zhang,Zhiguo Du,Shubin Yang
Although 2D transition-metal carbides (MXenes) are usually synthesized by selective etching and chemical vapor deposition approaches, they are limited by the slow reaction kinetics, resulting in their continuous production challenging. Here, we demonstrate a bubbling chemical vapor growth (BCVG) method to continuously produce Cl-terminated MXenes by the reaction of CH 4 and TiCl 4 chemical bubbles with titanium powder in a molten salt. In the molten reaction system, titanium powder would effectively react with TiCl 4 to form highly active [TiCl 6 ] y – with low Ti Cl bond dissociation energies. The multivalent [TiCl 6 ] y – could efficiently incorporate the carbon species from CH 4 to form [Ti 6 CCl 18 ] clusters on the surface of bubbles in a low energy barrier, efficiently promoting the reaction kinetics. Subsequently, Cl-terminated MXenes were produced based on the following condensation reaction of [Ti 6 CCl 18 ] clusters. The resultant MXene (Ti 2 CCl x ) exhibits an expanded structure with strong interfacial polarization between its basal planes and the polymer matrix, delivering a good electromagnetic wave absorption performance with a minimum reflection loss (RL min ) value of –52.2 dB at a thin thickness of 2.84 mm.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 5
·期 7
·2000248
·
IF 5.969
Lianjia Zhao,Yiqiang Zheng,Kang Wang,Chao Lv,Wei Wei,Lili Wang,Wei Han
Although ammonia gas sensor research has been developed for a long time, room temperature flexible ammonia gas sensors with high sensitivity and selectivity are still hot research topics. 2D transition metal carbides and nitrides (MXenes) have combined their versatile surface chemistry and high metal conductivity to show their enormous sensing potential. Herein, developing a room temperature nanocomposite based on 2D MXenes materials and cationic polyacrylamide (CPAM) with high gas response and flexibility targeting the construction of high-performance ammonia sensors is focused on. Thanks to the hydrogen bond composition, ohmic contact with the interdigitated electrodes, and excellent mechanical properties, the CPAM/Ti 3 C 2 T x -based ammonia sensors exhibit high ammonia selectivity, faster response–recovery rate (12.7/14.6 s), excellent flexibility, and long-term mechanical stability at room temperature. The synthesis of the CPAM/Ti 3 C 2 T x nanocomposites offers a lasting inspiration for developing high-performance flexible gas sensors.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 34
·17715-17724
·
IF 6.895
Ruzhan Qin,Mingjun Hu,Xin Li,Li Yan,Chuanguang Wu,Jinzhang Liu,Haibin Gao,Guangcun Shan,Wei Huang
As a new class of two-dimensional transition-metal carbides and carbonitrides, MXenes have been widely used in energy storage, sensing, catalysis, electromagnetic interference shielding and other fields. It is a challenge to simultaneously realize a sensor with extremely high sensitivity, wide detection limits, low power consumption and good mechanical stability. In this work, taking advantage of the high conductivity of MXenes and the porous structure of polyvinyl butyral, a highly sensitive piezoresistive sensor was fabricated. The fabricated MXene/PVB-based sensor exhibits high sensitivity and reliability with a factor of ∼11.9 kPa−1, ∼1.15 kPa−1 and ∼0.20 kPa−1 in the ranges of 31.2 Pa–312 Pa, 312 Pa–62.4 kPa and 62.4 kPa–1248.4 kPa, respectively. The sensor has a wide detection range (∼31.2 Pa to ∼2.205 MPa), low detection limit (6.8 Pa), low detection voltage (0.1 mV), low power consumption (∼3.6 × 10−10 W), fast response time (∼110 ms) and good mechanical stability (over 10 000 maximum-pressure cycles). Moreover, it is demonstrated that the sensor can detect subtle bending and release activities of humans, including arterial pulses and voice signals, which makes it potentially suitable to be used as a wide detection range, highly sensitive and low power consumption piezoresistive sensor. This work provides a new avenue to expand the application of MXene-based flexible pressure sensors with a wide sensing range and ultra-low power consumption.
研究领域:
材料科学
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传感器技术
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jianguang Xu,Zhiyong Liu,Qiang Wang,Junsheng Li,Yuxiang Huang,Mengnan Wang,Linyu Cao,Wei Yao,Haijiang Wu,Chi Chen
MXenes show promising potential in supercapacitors due to their unique two-dimensional (2D) structure and abundant surface functional groups. However, most studies about MXenes have focused on tailoring surface structures by alternating synthesis methods or post-etch treatments, and little is known about the inherent relationship between surface groups and M elements. Herein, we propose a simple and novel strategy to adjust the surface structure of few-layered MXene flakes by adding a small amount of Nb element. Because of the strong affinity between Nb and O elements, the as-received V1.8Nb0.2CTx and Ti2.7Nb0.3C2Tx MXenes have much fewer −F functional groups and a higher O content than V2CTx and Ti3C2Tx MXenes, respectively. Thus, both V1.8Nb0.2CTx and Ti2.7Nb0.3C2Tx MXenes show enhanced pseudocapacitance performance. Especially, V1.8Nb0.2CTx delivers an ultrahigh volumetric capacitance of 1698 F/cm3 at a scan rate of 2 mV/s. Moreover, benefiting from the high activity of MAX precursors obtained through a fast self-propagating high-temperature synthesis, the etching time to produce V-based MXenes is much shorter than that in previous reports. Therefore, the results presented here are applicable to the surface engineering and rational design of 2D MXene materials and develop them into promising, cost-effective electrode materials for supercapacitors or other energy-storage equipment.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-18
·
IF 31.6
Shan Bo,Wang Yang,Ji Xinyi,Huang Yi
Two-dimensional carbon-based materials have shown promising electromagnetic wave absorption capabilities in mid- and high-frequency ranges, but face challenges in low-frequency absorption due to limited control over polarization response mechanisms and ambiguous resonance behavior. In this study, we propose a novel approach to enhance absorption efficiency in aligned three-dimensional (3D) MXene/CNF (cellulose nanofibers) cavities by modifying polarization properties and manipulating resonance response in the 3D MXene architecture. This controlled polarization mechanism results in a significant shift of the main absorption region from the X-band to the S-band, leading to a remarkable reflection loss value of − 47.9 dB in the low-frequency range. Furthermore, our findings revealed the importance of the oriented electromagnetic coupling in influencing electromagnetic response and microwave absorption properties. The present study inspired us to develop a generic strategy for low-frequency tuned absorption in the absence of magnetic element participation, while orientation-induced polarization and the derived magnetic resonance coupling are the key controlling factors of the method.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Defu Gan,Qiang Huang,Jibo Dou,Hongye Huang,Junyu Chen,Meiying Liu,Yuanqing Wen,Zhenyu Yang,Xiaoyong Zhang,Yen Wei
MXenes are a novel type of two-dimensional (2D) materials that could be obtained from etching of Al atoms in layered hexagonal ternary carbide. These 2D materials display many outstanding physicochemical properties and are potentially utilized for various applications. Although previous reports demonstrated that MXenes and MXenes-based composites could be potentially utilized for environmental applications, the adsorption performance is limited and development of facile methods for synthesis MXenes-based composites with higher adsorption capability is of great importance. In this work, we reported for the first time that MXenes-based polymeric composites (Ti 3 C 2 T X -PDOPA) could be simply fabricated via mixing of MXenes (Ti 3 C 2 T X ) and levodopa (DOPA) under rather mild reaction conditions. In this reaction system, DOPA could adhere on the surface of MXenes through self-polymerization and many carboxyl groups could thus introduce during the polymerization procedure to form poly (DOPA). The resultant Ti 3 C 2 T X -PDOPA composites were utilized as adsorbents and showed higher adsorption capacity in removal heavy metal ions as compared with that of raw Ti 3 C 2 T X . More importantly, Ti 3 C 2 T X -PDOPA composites could be further functionalized with other functional materials through subsequent reaction because many reactive functional groups were introduced on MXenes and various MXenes-based composites could be fabricated.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 45
·2106000
·
IF 18.808
Tianshi Zhao,Chun Zhao,Wangying Xu,Yina Liu,Hao Gao,Ivona Z. Mitrovic,Eng Gee Lim,Li Yang,Ce Zhou Zhao
The highly parallel artificial neural systems based on transistor-like devices have recently attracted widespread attention due to their high-efficiency computing potential and the ability to mimic biological neurobehavior. For the past decades, plenty of breakthroughs related to synaptic transistors have been investigated and reported. In this work, a kind of photoelectronic transistor that successfully mimics the behaviors of biological synapses has been proposed and systematically analyzed. For the individual device, MXenes and the self-assembled titanium dioxide on the nanosheet surface serve as floating gate and tunneling layers, respectively. As the unit electronics of the neural network, the typical synaptic behaviors and the reliable memory stability of the synaptic transistors have been demonstrated through the voltage test. Furthermore, for the first time, the UV-responsive synaptic properties of the MXenes floating gated transistor and its applications, including conditional reflex and supervised learning, have been measured and realized. These photoelectric synapse characteristics illustrate the great potential of the device in bio-imitation vision applications. Finally, through the simulation based on an artificial neural network algorithm, the device successfully realizes the recognition application of handwritten digital images. Thus, this article provides a highly feasible solution for applying artificial synaptic devices to hardware neuromorphic networks.
研究领域:
神经科学
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材料科学
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电子工程
✓ 已验证
DOI
高影响因子
Cancer Nanotechnology
·
2023
·Vol. 14
·期 1
·1-16
·
IF 5.7
Bai Zhiqiang,Zhao Lu,Feng Haidi,Xin Zhihui,Wang Chaoyu,Liu Zhixiong,Tian Maozhong,Zhang Haifei,Bai Yunfeng,Feng Feng
Background Ti 3 C 2 is a type of transition metal carbides and nitrides (MXenes) with high light-to-heat conversion efficiency property, which has been widely used in cancer treatment recently. In fact, active targeting delivery of MXenes nanomaterials with targeting molecule could enhance the therapeutic efficacy. However, targeted therapy of MXenes has not been further studied in the past. Aptamers (Apt) with excellent affinity and high specificity properties have been widely used as targeting tools. Predictably, the incorporation of Apt into Ti 3 C 2 nanomaterials will offer an unprecedented opportunity in the research fields of cancer targeted therapy. Results Transmembrane glycoprotein mucin 1 (MUC1) is overexpressed on the surface of MCF-7 cells, and MUC1 Apt (Apt-M) could target MCF-7 cells with high affinity and specificity. Here, a smart targeting nanotherapeutic system Ti 3 C 2 /Apt-M was fabricated, which could specifically recognize and enter in MCF-7 cells. Benefitting from the desirable targeted performance of Apt-M, MCF-7 cells completed the ingestion process of Ti 3 C 2 /Apt-Mf nanosheets within 4 h, and Apt-M facilitated the entry of the Ti 3 C 2 /Apt-Mf nanosheets into MCF-7 cells. Besides, Ti 3 C 2 /Apt-M nanosheets exhibited the potential as an outstanding photothermal agent (PTA) because of the photothermal performance inherited from wrapped Ti 3 C 2 nanosheets. As demonstrated, upon 808 nm laser irradiation, the Ti 3 C 2 /Apt-M nanotherapeutic system displayed a satisfactory antitumor effect by targeted photothermal therapy both in vitro and in vivo. Conclusion This study provides a new idea for the development of MXenes nanotherapeutic system with high active targeting performance. Graphical Abstract
研究领域:
纳米技术
·
癌症治疗
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）