CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lun Zhang,Xiaoyu Zhang,Huiyuan zhang,Liqiang Xu,Dong Wang,Xingyuan Lu,Aimin Zhang
Flexible sensors are attracting tremendous interest in electronic skins and human detection. It is highly desirable yet challenging to incorporate self-healing, high sensitivity, and large stretchability into strain sensors due to their internal contradiction and complex manufacturing process. Herein, we fabricate such a sensor with a unique multiscale conductive layer structure by simply spraying conductive substances to the elastomer with dynamic Diels-Alder (DA) bonds. The multiscale structure consists of 1D semi-embedded silver nanowire (AgNW) and 2D transition metal carbide/carbonitride (MXene) nanosheets. Meanwhile, the AgNW does not merely provide stable conductivity as well as a robust interface bonding with the substrate under considerable strain. While MXene is tightly coated on the AgNW skeleton, the intrinsic brittleness of MXene supports a significant resistance variation when stretching. The obtained sensor can simultaneously achieve highly sensitive, a wide sensitivity range (0.5%∼ 96%), excellent durability, fast response (71 ± 4.9 ms), and relaxation (138 ± 5.8 ms). Interestingly, it can also detect pressure over a wide range (183–2260 kPa) and even withstand human walking and hand touching. Moreover, benefiting from the dynamic and designability crosslink network, the mechanical and electrical properties can be restored. This excellent sensor provides an approach for next-generation wearable electronics.
研究领域:
材料科学
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电子皮肤
·
生物医学工程
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075601
·
IF 3.404
Liang Shi,Chonglei Xu,Daixun Jiang,Xun Sun,Xiaopeng Wang,Qicong Wang,Yelong Zhang,Xiaofei Qu,Fanglin Du
Heterostructured photocatalysts play a significant role in the removal of contaminants by decreasing the recombination of the photo-induced charges. Herein, we presented novel TiO2/C/BiVO4 ternary hybrids employing a 2D layered Ti3C2 MXene precursor, overcoming the lattice mismatching of TiO2/BiVO4 binary heterostructures simultaneously. Raman and XPS analyses proved the strong coupling effects of TiO2, carbon and BiVO4 components, and the heterostructures were identified from high-resolution transmission electron microscopy results. Moreover, the ternary TiO2/C/BiVO4 composites exhibit excellent photocatalytic performance of Rhodamine B degradation, which is about four times higher than pure BiVO4 and twice that of binary TiO2/BiVO4 heterostructures, reaching a reaction constant of 13.7 × 10−3 min−1 under visible-light irradiation (λ > 420 nm). In addition, for the possible mechanism for dye elimination it was proposed that RhB molecule be directly oxidized by photo-induced holes (h+) on the BiVO4 components and superoxide radical ({{{\rm{O}}}_{2}}^{\cdot -}) generated from conduction band electrons of the heterostructures. This work will provide possibilities for developing visible-light responsive nanomaterials for efficient solar utilization.
研究领域:
材料科学
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环境科学
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光催化技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Leilei Lan,Xingce Fan,Shaobo Yu,Juan Gao,Caiye Zhao,Qi Hao,Teng Qiu
Two-dimensional (2D) MXene materials have attracted broad interest in surface-enhanced Raman scattering (SERS) applications by virtue of their abundant surface terminations and excellent photoelectric properties. Herein, we propose to design highly sensitive MXene-based SERS membranes by integrating a 2D downsizing strategy with molecular enrichment approaches. Two types of 2D vanadium carbide (V4C3 and V2C) MXenes are demonstrated for ultrasensitive SERS sensing, and corresponding SERS mechanisms including the effect of 2D vanadium carbide thickness on their electron density states and interfacial photoinduced charge transfer resonance were discussed. A 2D downsizing strategy authorizes nonplasmonic SERS detection with a sensitivity of 1 × 10–7 M. Moreover, the performance can be further upgraded by vacuum-assisted filtration, which enables an ultrarapid molecular enrichment (within 2 min), ultrahigh molecular removal rate (over 95%), and improved sensitivity (5 × 10–9 M). This work may shed light on the MXene-based materials as an innovative platform for nonplasmonic SERS detection.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
·
2025
·
IF 3.4
Liwei Yang,Xinshuai Yan,Jianguo Duan,Kun Lei,Yaxiong Wang,Jianguo Cheng
Phase change materials (PCM) possess the issues of leakage, low thermal conductivity, lack of rigidity and poor photo thermal conversion ability. To overcome these challenges, we have successfully designed and prepared flexible PW/PU/CuNWs/MXene (PPCuM) composite phase change materials with high thermal conductivity by solution blending and vacuum impregnation by using polyurethane (PU), one-dimensional copper nanowires (CuNWs) as high thermal conductivity, and two-dimensional transition metal carbide/nitride (MXene) as fillers. Furthermore, PU based PCM is developed by adding MXene at different weight fractions and the influence of MXene content on PPCuM properties was studied. As expected, benefiting from the high aspect ratio and strong capillary force of the MXene as well as the interfacial interaction between the PCM molecule and MXene, the resulting PPCuM exhibit a large thermal conductivity (0.705 W·m−1·K−1), which is 332.5% higher than that of pure PW, high latent heat (155.42 J·g−1), mechanical strength reaches 81.83 KPa, and are form-stable upon heating up to 75°C. The solar simulator and thermal conductivity demonstrated a superior photo-thermal conversion capability and thermal networks for the developed PU based composite sample at 83.3 wt% of MXene. At the same time, MXene effectively improved the photo-thermal conversion capacity (91.35%) and heat transfer rate (2.91 J·s−1) of PPCuM, which was further confirmed by the surface temperature distribution results. In addition, PPCuM has excellent photo-thermal conversion efficiency, good chemical compatibility, crystallization properties, and acceptable thermal stability.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 16
·165603
·
IF 3.953
Yongqin Hu,Chen Hou,Yuxia Shi,Jiamei Wu,Da Yang,Zhuili Huang,Yan Wang,Yufei Liu
Electromagnetic pollution seriously affects the human reproductive system, cardiovascular system, people's visual system, and so on. A novel versatile stretchable and biocompatible electromagnetic interference (EMI) shielding film has been developed, which could effectively attenuate electromagnetic radiation. The EMI shielding film was fabricated with a convenient solution casting and steam annealing with 2D MXene, iron oxide nanoparticles, and soluble polyurethane. The EMI shielding effectiveness is about 30.63 dB at 8.2 GHz, based on its discretized interfacial scattering and high energy conversion efficiency. Meanwhile, the excellent tensile elongation is 30.5%, because of the sliding migration and gradient structure of the nanomaterials doped in a polymer matrix. In addition, the film also demonstrated wonderful biocompatibility and did not cause erythema and discomfort even after being attached to the arm skin over 12 h, which shows the great potential for attenuation of electromagnetic irradiation and protection of human health.
研究领域:
材料科学
·
生物医学工程
·
电磁学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wei Wang,Huimeng Feng,Jianguo Liu,Mutian Zhang,Shuan Liu,Chao Feng,Shougang Chen
Ti 3 C 2 T x (MXene) as a two-dimensional material has attracted numerous attentions in photocatalysis and antibacterial, and the effectiveness of MXene for photocatalysis triggered antibacterial is in urgent need of development. Herein, we synthesized a novel cuprous oxide (Cu 2 O) anchored MXene nanosheet. Cu 2 O nanospheres can be uniformly anchored on the surface of MXene firmly due to the electrostatic effect between single-layer MXene and Cu 2 O nanospheres. In comparison with MXene, Cu 2 O and mixture (MXene and Cu 2 O), Cu 2 O/MXene nanosheet exhibits an excellent antibacterial activity against S. aureus and P. aeruginosa , whose bacteriostasis efficiencies sharply increased to 97.04% and 95.59%, respectively. Photoluminescence spectroscopy reveals that the incorporation of MXene and Cu 2 O can effectively prevent the recombination of electron-hole pairs of Cu 2 O and present a high photocatalytic disinfection. Single-layer MXene with large surface area accepts electrons from Cu 2 O, leading to abundant electrons on the surface of MXene, which provide better charge transfer between bacteria and Cu 2 O/MXene nanosheets. In addition, density functional theory calculations were used to investigate an optimized band structure of Cu 2 O-MXene as well as its strong electronic interactions, which are essential for photocatalysis and ROS generation. Finite element method further revealed that MXene promoted an enhancement of surface plasmon resonance to generate ROS on the surface of Cu 2 O/MXene. Furthermore, Cu 2 O/MXene shows a synergistic antibacterial effect of MXene accelerating photoelectron transportation, Cu 2 O antimicrobial and photocatalysis, elevated ROS production ability, and surface plasmon resonance action on the surface of Cu 2 O/MXene.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
化学
✓ 已验证
DOI
高影响因子
2D Materials
·
2023
·Vol. 10
·期 2
·024006
·
IF 5.5
Haishan Xu,Han Zhang,Yifan Wang,Chen Tang,Tianyu Xiao,Zhi Xu,Hong Li,Fugui Xu,Yiyong Mai
Li-S batteries have received much attention due to their high energy density, low cost and environmental friendliness. However, the poor conductivity of sulfur and the 'shuttle effect' of polysulfides still impede their practical applications. In this study, thin layered MXene nanosheets sandwiched by conductive poly(m-phenylenediamine) with in-plane cylindrical mesochannels (mPmPD/MXene) are constructed as sulfur hosts for the cathode materials of Li–S batteries. The polar active sites on MXene and mesoporous conductive PmPD polymers synergistically alleviate the polysulfide shuttling through chemisorption and physical confinement; the high metallic conductivity of MXene and conductive PmPD ensure the transport of electrons and promote the redox kinetics; the in-plane cylindrical mesochannels on mPmPD/MXene provide hosting space for high sulfur loading (∼71 wt%) and facilitate smooth electrolyte transport in the internal space of the cathode. Profiting from these advantages, the Li–S battery based on the mPmPD/MXene cathode exhibits a capacity decay of 0.0593% after 800 cycles at 1 C (53% capacity retention). The optimized battery shows stable cycling performance even at high sulfur loading (6.8 mg cm−2) with 5.6 mAh cm−2 capacity remained after 60 cycles at 0.1 C. This study provides insights for the rational design of 2D heterostructures with in-plane mesochannels for high-performance Li-S batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yanyan Ma,Hongwei Zhang,Haofei Cong,Yuxiao Wang,Shuwen Xin,Peilong Xu,Yuanbin Qin,Guangxu Xu,Xiaochan Kang,Fengyun Wang
Transition metal phosphides (TMPs) are considered satisfactory anode candidates for sodium-ion batteries (SIBs) due to their high energy density and modest plateau. However, the TMPs anode suffers from poor cycling and rate properties owing to the negative effects of severe volumetric expansion and sluggish reaction kinetics. Herein, a novel structure of porous core/shell CoP@N-C nano polyhedral embedding on 2D MXene nanosheets (CoP@N-C/MXene) was synthesized by self-assembly and in-situ phosphorization methods. The porous CoP@N-C with the unique core/shell structure benefits the infiltration of electrolytes and alleviates the volumetric change. Besides, high-conductive 2D MXene nanosheets could enhance electrical conductivity and charge transfer kinetics, and effectively inhibit CoP@N-C pulverization and agglomeration. Based on the above advantages, the as-prepared CoP@N-C/MXene anode delivers an excellent cycling capacity, outstanding rate capability and low-temperature high-rate capability. This synthetic strategy of CoP@N-C/MXene architecture can be extended to other materials which are promising for SIBs electrodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2021
·
IF 5.234
Lu Liu,Guobing Ying,Dong Wen,Yuexia Li,Kaicheng Zhang,Huihua Min,Cong Hu,Cheng Sun,Cheng Wang
Two-dimensional (2D) nanomaterials based on MXenes have gained increasing importance in the field of strength reinforcement. However, the easy oxidation of MXenes has long been deemed unfavorable for reinforcement in high-temperature processing. Herein, high-shear mixing was used in present work for simple and efficient dispersion of MXenes in copper powders. Partial MXene sheets were also in-situ oxidized to TiO 2 particles to form nail board-like structure reinforcement (NSR) during spark plasma sintering (SPS) process at 600 °C, which allowed one to significantly improve the yield strength of copper matrix by up to 70.3%. Experimental characterization and modeling simulations enabled one to identify second phase strengthening as the main reason for increased yield strength of the composites. In particular, the mechanical engagement of NSR played an important role in strengthening. Meanwhile, the hardness of TiO 2 particles on NSR was found to be higher than that of the copper matrix, leading to enhancement in compressive yield strength. Also, the presence of MXene sheets on NSR slightly reduced the resistance of copper matrix composites . In sum, these findings look promising for designing novel MXene reinforced metal matrix composites with improved mechanical properties.
研究领域:
材料科学
·
金属基复合材料
·
纳米技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Bin Sun,Xusheng Dong,Huapeng Li,Yupeng Shang,Yuxin Zhang,Falu Hu,Shaonan Gu,Yue Wu,Tingting Gao,Guowei Zhou
Exploring versatile materials that efficiently adsorb pollutants from wastewater is of critical importance for environmental remediation. As an emerging 2D material, MXene features a hydrophilic surface with abundant oxygen-containing groups that render a negatively charged surface, implying its great potential for removing cationic pollutants from wastewater. Given its remarkable properties, a novel Ti 2 CT x MXene as an adsorbent is synthesized through selective etching of Al layer from Ti 2 AlC and then ultrasonic exfoliation. The adsorption studies indicate that Ti 2 CT x exhibits highly efficient methylene blue (MB, cationic dye) removal performance, the maximum adsorption capacity can reach as high as 2460.9 mg g −1 , which is considerably higher than the values of graphene (83.2 mg g −1 ) and anionic dye removal (methyl orange, 122.6 mg g −1 ). Furthermore, the adsorption behavior fits well with the pseudo-second-order kinetic and Langmuir isotherm models, and thermodynamic analysis indicates that the adsorption is spontaneous and endothermic. Based on scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra analysis, the principal adsorption mechanism is related to the electrostatic interaction between Ti 2 CT x and MB molecules. Meanwhile, the result is also confirmed by adsorption experiments at different pH values and background ions. This work shows that the MXene family materials can be applied as high efficiency adsorbent for removing cationic dyes from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yanli Wang,Wenjing Qin,Xiaoyu Hu,Zhongsheng Liu,Zhixin Ren,Huanqi Cao,Baigang An,Xiang Zhou,Muhammad Shafiq,Shougen Yin,Zunfeng Liu
A flexible sensor can be applied to monitor human motion, which can further be engineered with soft robotics to monitor their motion in the real time. However, to realize deformation detection with high-sensitivity in soft robots while simultaneously maintaining a high linearity and cyclic stability of the sensor yet remains as an unmet challenge. Herein, we fabricated strain sensors exhibiting a buckle and a sandwich like structure by spraying MXene (Ti 3 C 2 T x )/carbon nanotubes (CNTs)/fluoro-rubber composite materials onto a 200 % pre-stretched flexible rubber substrate. The resulting strain sensors displayed a wide range of detection (e.g., 1–150 %), high sensitivity (gauge factor (GF) for up to 461), good linearity, fast response time (21.2 ms), large stretching (150 %) as well as, excellent repeatability and stability. This sensor can further monitor the human physiology and the motion of the body. We also developed a soft robot with integrated sensors that enabled it to crawl like a caterpillar while leveraging its sensing function to detect its status in the real time. Conclusively, these hybrid strain sensors may have broad implications for robotics as well as wearable sensors for health monitoring and physiological recordings.
研究领域:
材料科学
·
生物医学工程
·
软体机器人技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chenglong Li,Shuang Wang,Yinghe Cui,Xiaodong Wang,Zhipeng Yong,Dan Liang,Yue Chi,Zhe Wang
Two-dimensional transition metal carbides/nitrides (MXene) have excellent physicochemical properties, but the restacking of MXene films restricts their development towards flexible supercapacitors with high energy density . Introducing Polyaniline (PANI) into the MXene layer and expanding the interlayer distance of the MXene can reduce the effect of restacking on the MXene after compounding. However, despite the excellent electronic conductivity of the composited MXene/PANI (MP), its internal slow ionic kinetics becomes a fundamental limitation of the electrochemical performance after the MP loading increases. To compensate for this weakness, MP films are often scaled down to a few micrometers in size (<2 mg cm −2 ), which limits their development. Here, we introduce α-Fe 2 O 3 /MnO 2 (FM) into MP for the first time by designing a sandwich structure, which significantly improves the bulk capacitance. Due to a large number of active sites and good hydrophilic properties on the MXene surface, FM can interact with the MP. By complexing with MP, the accumulation and loss of FM can be reduced. At the same time, the effect of increasing loading on the electrochemical performance of MP can be compensated. The MXene-PANI/α-Fe 2 O 3 -MnO 2 /MXene-PANI (MP/FM/MP) electrode still exhibits high capacitive performance (661 F g −1 , 3138 mF cm −3 ) when the MP loading reaches 5 mg cm −2 , with excellent mechanical properties and increased flexibility. In addition, the corresponding symmetric supercapacitor also shows a remarkable energy density of 53.32 Wh·L −1 (17.45 Wh kg −1 ). This study provides a way to fabricate MXene-based electrodes with high loadings by designing sandwich-structured electrodes.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）