TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2023
·
IF 4.5
Hao-yu ZHANG,Gui-bin TIAN,Fu-ying WU,Zhen-dong YAO,Jia-guang ZHENG,Liu-ting ZHANG
Two-dimensional Mo 2 TiC 2 MXenematerial was synthesized by etching Mo 2 TiAlC 2 and then doped into MgH 2 to tailor its hydrogen storage performance. The initial hydrogen desorption temperature of the Mo 2 TiC 2 -doped MgH 2 was significantly reduced from 330 °C (pristine MgH 2 ) to 187 °C. Isothermal dehydrogenation analysis indicated that the MgH 2 +9 wt.% Mo 2 TiC 2 composite rapidly discharged 6.4 wt.% H 2 at 300 °C within 4 min. For hydrogenation, the dehydrogenated MgH 2 +9 wt.% Mo 2 TiC 2 uptook 6.5 wt.% H 2 at 175 °Cwithin 5 min. By calculation, the activation energy for MgH 2 +9 wt.% Mo 2 TiC 2 was calculated to be (135.6±1.9) kJ/mol for the desorption reaction and (46.1±0.2) kJ/mol for the absorption reaction. After 20 cycles, 1.0 wt.% H 2 was lost for the MgH 2 +9 wt.% Mo 2 TiC 2 composite. Microstructure analysis results showed that the presence of Mo in Mo 2 TiC 2 enhanced the thermal stability of MXene and reduced the amount of active Ti during cycling, leading to poorer catalytic effect of the catalyst compared to Ti 3 C 2 .
研究领域:
材料科学
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能源存储
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催化化学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jie Lu,Xiang Xu,Hao-wen Zhang,Meng-lin Huang,Yang-sheng Wang,Zhe-sheng Feng,Yan Wang
As non-contact sensing, non-invasive medical diagnostics and environmental humidity monitoring technologies advance, the demand for high-performance humidity sensors is becoming increasingly apparent. Ti 3 C 2 T x MXene is an attractive humidity-sensitive candidate due to its excellent chemical activity and hydrophilic surface. However, achieving fast responsiveness and high sensitivity of dynamic changes in humidity is still challenging. Herein, this work introduced a WS 2 -modified Ti 3 C 2 T x MXene composite material as humidity sensing material with superior sensing performance. Then sodium carboxymethyl cellulose solution was added to the Ti 3 C 2 T x MXene/WS 2 composite material to adjust viscosity of the composite material, enabling the formulation of printable humidity-sensitive ink. Utilizing screen-printing technology, a mass-producible humidity sensor (CMXW2) was successfully fabricated. Experimental results show that the sensor has short response and recovery times of 4.65 s/1.33 s in the relative humidity of 11–97 % with a high humidity response of 1707 % and excellent mechanical properties. The efficacy of the humidity sensor for skin moisture monitoring, real-time respiration monitoring, and non-contact switch was also evaluated. The successful demonstration of multi-scenario applications using the CMXW2 humidity sensor opens up new possibilities and applications in the fields of smart healthcare and non-contact sensing.
研究领域:
材料科学
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生物医学工程
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智能医疗
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Zhonghua Lv,Xi Chen,Ling Yang,Mengting Li,Changjun Xia,Chunjia Luo,Min Chao,Luke Yan
We present a biomimetic switchable MXene membrane for water treatment inspired by chloride ion transmembrane transport. The MXene membrane was modified with poly(2-diethylaminoethyl methacrylate), resulting in increased hydrophilicity and enlarged channels. The membrane exhibited a permeability of 4.42 × 104 L m–2 h–1 bar–1, surpassing conventional MXene membranes. The membrane also separated Methylene Blue positively charged at pH = 12 and Amido Black 10B negatively charged at pH = 2 with separation efficiency above 98%, thanks to controllable channel size and adjustable electrostatic interactions in response to pH or CO2. This research offers valuable insights into the design of pH-responsive membranes with adjustable selectivity, representing a significant advancement in smart filtration with versatile applications.
研究领域:
材料科学
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环境工程
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Xinxin Li,Min Yang,Wenjing Qin,Changshun Gu,Lei Feng,Zhenhao Tian,Hanying Qiao,Junji Chen,Jianxing Chen,Shougen Yin
With the development of wearable intelligent devices, flexible textiles integrate high-performance sensing, electromagnetic shielding and Joule heating show broad application prospects. However, it is still difficult to improve all the performance simultaneously through simple methods. Here, we have prepared MXene/PU composite fiber film with multilayer porous network structure by using the electrospinning spraying alternate operation process. This film has ultra-high sensitivity (GF= 77,751), super large detection range (400%) and ultra-low detection limit (0.05%). Secondly, the multilayer fiber film has excellent EMI shielding performance (EMI SE=38 dB), and the EMI shielding capacity of the multilayer film can still exceed the commercial standard when it is stretched to 20%. Finally, the multilayer fiber film shows better Joule heating performance, including lower voltage drive (2 V) and faster thermal response (12 s). The excellent performance of the composite come from the synergistic effect of MXene and the unique multi-layer porous network structure. Among them, MXene provides excellent conductivity, electrothermal and electromagnetic shielding performance. The layered porous network structure can store the strain in advance and form a parallel circuit, which improves the sensing range, increases the transmission path of electromagnetic waves , and realizes the homogeneity of Joule heating. In addition, the outer PU slows down the invasion of oxygen, thus slows down the oxidation of MXene, and ensures the performance of materials in a long time. The multilayer fiber film has been proved to be suitable for sensing at low temperature, and has broad application prospects in wearability.
研究领域:
材料科学
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电子工程
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纺织科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Ziye Wang,Guijuan Liu,Ting Yang,Yao Liang,Fangqi Zhou,Xiaohui Ju,Weixing Li
Mixed matrix membranes (MMMs) demonstrate significant potential for pervaporation applications. Nevertheless, single lamella 2D materials are prone to stacking problems in membranes, resulting in unforeseen matrix inhomogeneity and defects. Here, we propose a wafer-like membrane structure designed for ethanol dehydration. This structure features a surface modification of transition metal carbides (MXenes) with layered dihydroxides (LDHs), which effectively enlarges the interlayer spacing and ameliorates the stacking issue. The LDHs-modified MXenes were then incorporated into the sodium alginate (SA) layer. The hydrophilicity , stability and morphology of the MMM were evaluated by water contact angle measurements, swelling tests and scanning electron microscopy. The experiment results indicated the hydrophilicity and stability of the MMM were effectively improved. The novel L-M@CS MMM exhibited outstanding dehydration performance for ethanol solution, with the membrane containing 0.4 wt % LDHs-modified MXenes achieving the highest permeation flux of 1377 g/(m 2 ·h) and the optimal separation factor up to 1650.
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
ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Jiaxin Wu,Wenfei Ai,Yue Long,Kai Song
Soft actuators possessing notable mechanical deformations, high sensitivity, and fast response speed play a crucial role in various applications, such as artificial muscles, soft robots, and intelligent devices. In this study, a smart humidity-driven actuator was successfully fabricated by utilizing MXene/cellulose nanofiber (CNF)/LiCl (MCL) through vacuum-assisted filtration with fast response speed and high sensitivity. Utilizing the excellent humidity responsiveness of MXene/CNF and the robust hygroscopicity of LiCl, the synergistic effect of these materials enhances the hygroscopic properties and response speed of the actuator. The MCL actuator demonstrates excellent actuation performance, fast deformation, and reliable cyclic stability. To illustrate the extensive potential of the soft actuator, a range of applications, from bionic devices to soft grippers and crawling actuators, are showcased. Remarkably, the crawling actuator demonstrates sustained crawling motion without necessitating a humidity switch, relying on the humidity gradient from water droplets, and exhibits spontaneous directional motions within a certain range, which makes it a promising prospect in the field of soft robotics.
研究领域:
材料科学
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智能设备
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软机器人
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 50
·29015-29022
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IF 3.049
Yanjie Dong,Dashen Sang,Chengdong He,Xinfeng Sheng,Longwen Lei
Mxene has been widely used as a sorbent to remove heavy metal ions from sewage due to its unique two-dimensional layered structure and abundant oxygen-containing groups. However, Mxene has a relatively limited adsorption capacity for metal ions possibly due to the limited adsorption active sites. Herein, we reported novel Mxene/alginate composites for lead and copper ion removal from wastewater. The Mxene/alginate composites prepared in this study not only enhance the chelation ability of the lead and copper ions, but also accelerate the ion transport efficiency. The combined advantages of high adsorption capacity and short equilibrium time enable the Mxene/alginate composites to achieve the maximum adsorption capacity for Pb2+ and Cu2+ at 382.7 and 87.6 mg g−1, respectively, and reach the adsorption equilibrium in 15 min. We believe that the composites developed in this study can open a new avenue for designing high adsorption capacity and high efficiency adsorbents.
研究领域:
环境科学
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材料科学
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化学工程
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污染控制
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水处理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Chuanliang Wei,Huifang Fei,Yongling An,Yuchan Zhang,Jinkui Feng
Spinel LiMn 2 O 4 is considered to be a promising cathode for lithium-ion batteries owing to its low cost, safety, environmental friendliness , high operating voltage and natural abundance of manganese. However, the accelerated dissolution of manganese at elevated temperature results in serious capacity fading, which inhibits its further application in energy storage systems. The dissolution of manganese is mainly caused by the attack of trace acidic species (HF) in liquid electrolyte . Here, we report a facile, universal and effective strategy to suppress the dissolution of manganese at 55 °C by encapsulating LiMn 2 O 4 particles in crumpled Ti 3 C 2 T x nanosheets using an electrostatic self-assembly process. With high electronic conductivity and fast Li + transport capability, such protective layer reduces direct contact between liquid electrolyte and LiMn 2 O 4 particles, suppressing the dissolution of manganese. The composite exhibits larger discharge specific capacity, enhanced rate and cycling capabilities. The capacity retention ratio can be improved by 18.3% at 55 °C after 200 cycles at 2 C. This study provides a new strategy for suppressing the dissolution of manganese at high temperature and widens the road for the application of 2D MXene in energy storage field. The electrostatic self-assembly strategy we proposed is universal and can be applied in other cathode materials, which can arouse much interest of relevant researchers.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Wenhua Cheng,Yan Zhang,Wenxiang Tian,Jiajia Liu,Jingyi Lu,Bibo Wang,Weiyi Xing,Yuan Hu
In this work, a highly efficient flame retardant and electromagnetic interference (EMI) shielding coating on cotton fabric was fabricated by a simple solution impregnation and dip-coating method, which involved three layers of polyacetimidate (PEI), ammonium polyphosphate (APP), and Ti3C2Tx. When exposed directly to flame, the PEI/APP coating lead to a char layer resulting in self-extinguishing performance. Particularly, the cotton fabric coated by increasing amounts of Ti3C2Tx gradually achieved EMI shielding performance. When the Ti3C2Tx sheets content was 5.2 mg/cm2, a high electrical conductivity of 670.3 S·m–1 and a EMI shielding effectiveness of 31.04 dB were achieved in the X-band with an absorption-dominated mechanism. Besides, such modified cotton fabric also has the potential to be used as an electrical heating material. The temperature could even reach up to about 64.3 °C under an applied voltage of just 4 V. Therefore, this work provided a feasible idea for preparing multifunctional fabrics.
研究领域:
材料科学
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纺织工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Huawei Wei,Jidong Dong,Xiaojiao Fang,Wenhui Zheng,Yutong Sun,Yue Qian,Zaixing Jiang,Yudong Huang
MXene , as a new 2-dimensional (2D) material, has excellently potential applications in the field of electrochemistry owing to its high conductivity and fast charge transporting speed. Especially, MXene/polymer composites have attracted widely attentions due to their extensive application in the area of multi-functional materials. Herein, the composites of Ti 3 C 2 T x MXene/polyaniline (PANI) with different PANI contents have been successfully prepared. The microwave absorption mechanism of these materials was investigated. Attributing to the multiple layer structure, the dielectric property of Ti 3 C 2 T x MXene and PANI, and the synergistic effect between the Ti 3 C 2 T x and PANI, the as-prepared composites possessed a specific microwave absorbing behavior. With a proper content of PANI, the MXene/PANI composites in a paraffin matrix exhibited a maximum reflection loss of −56.30 dB at 13.80 GHz with the thickness of 1.8 mm. In addition, the effective absorption bandwidth (>90%) ranged from X-band (8–12.4 GHz) to Ku-band (12.4–18 GHz) with the tunable thickness ranging from 1.5 to 2.6 mm. The results indicate that MXene/PANI composites has great potential to be used in the field of microwave absorption.
研究领域:
材料科学
·
电磁学
·
复合材料
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产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Quanfu Li,Minhua Xu,Chunsheng Jiang,Shuxiang Song,Tinghui Li,Manli Sun,Wuliang Chen,Huiling Peng
Herein, we reported a gas sensor based on MXene/Graphene composite sensitive film for low-concentration ammonia detection. Specifically, we use the electrophoretic deposition method to uniformly deposit MXene on the graphene film surface of the graphene sensor, thereby constructing the MXene/Graphene composite sensitive film. The ammonia sensitivity test results show that the MXene/Graphene composite film sensor exhibits fast response, high sensitivity and excellent selectivity to ammonia at room temperature and high humidity. At the same test concentration (100 ppm), the sensitivity of the MXene/Graphene sensor is 3 times higher than that of the graphene sensor, 2 times higher than that of the MXene film sensor, reaching 25%, and its theoretical limit of detection is 56 ppb. The response time is only 26 s and the recovery time is 148 s, while the response time of the graphene sensor is 228 s. The MXene/Graphene sensitive film takes full advantage of the hydrophilicity and abundant surface functional groups of MXene, and the excellent electrical conductivity of graphene, which solves the problems of low sensitivity, slow response speed, and inability to completely desorb ammonia gas of pure MXene or graphene. Potential applications in designing next-generation portable gas sensors for human breath detection analysis.
研究领域:
材料科学
·
传感技术
·
环境监测
✓ 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）