ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lili Zhu,Na Li,Hao Zhang,Junrong Yu,Zuming Hu,Yan Wang
The development of high-performance and lightweight microwave absorption materials (MAMs) requires effective strategies such as constructing multicomponent hetero interfaces and integrating multiple loss mechanisms. In this study, a series of magnetic CoNi@CNT nanoparticles were synthesized via a solvothermal method followed by thermal treatment, with the metal source ratio (Co/Ni) systematically adjusted to optimize their microstructure and electromagnetic wave absorption properties. The sample with a Co/Ni molar ratio of 1:1 was identified as the optimal magnetic component. Furthermore, porous MXene (PMXene) was employed as a dielectric substrate and combined with Co1Ni1@CNT through electrostatic self-assembly to form a hierarchical PMXene/CoNi@CNT hetero structure with synergistic dielectric–magnetic properties. This architecture not only enhanced interfacial polarization through multicomponent heterointerfaces but also improved impedance matching and attenuation capability via magnetic loss from CoNi alloys and extended conductive networks from CNT/PMXene. As a result, the composite with a dielectric-to-magnetic ratio of 1:1 at a low filler loading of 8 wt % exhibited a minimum reflection loss (RLmin) of −50 dB and an effective absorption bandwidth (EAB) of 4.3 GHz at a thickness of 1.5 mm, significantly outperforming pure PMXene (RLmin = −35 dB, EAB = 1.9 GHz). This work demonstrates the synergistic advantages of integrating MOF-derived magnetic components with two-dimensional dielectric substrates for high-efficiency microwave absorption, providing new insights into the design of advanced, lightweight electromagnetic functional materials.
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产品关联
DOI
PubMed
高影响因子
CARBON
·
2024
·
IF 10.5
Xingmin Liu,Boxiong Zheng,Yutuo Hua,Shaowei Lu,Zhisheng Nong,Jijie Wang,Yutong Song
Highly conductive MXene has attracted extensive focus owing to its notable ability for electromagnetic wave dissipation, but it also suffers from impedance mismatch. Herein, flexibly MXene/rGO aerogel frames (MGs) were construct by direct ink writing (DIW) of low concentration emulsion inks. Adjustment of compositional ratio and structural design could effectively regulate their EWA performances. The results indicate that the printed aerogel frame has an effective absorption bandwidth (EAB) of 8.10 GHz (covering the majority of X-band and entire Ku-band) and a minimum reflection loss (RL min ) of −56.85 dB. In addition, the printed ultralight aerogel frames integrate good mechanical performance and thermal insulation capability. The DIW technique for ultralight MXene-based absorber reveals beneficial inspiration and enlightenment for the structural design and potential application of EMA composites.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·096504
·
IF 4.316
Xuan Jian,Tong-Tong Wei,Mi-Mi Zhang,Rui Li,Jian-Xin Liu,Zhen-Hai Liang
The design of high-performance catalysts for hydrogen evolution reaction (HER) is urgently needed in the development of renewable energy. Herein, we report a rapid strategy for synthesizing an efficient catalyst with ultralow-Pt nanoclusters on a two-dimensional titanium carbide (Ti3C2Tx) MXene support (denoted as Pt NCs-MXene, 5 μg cm−2) via electrophoretic deposition and cyclic voltammetry. The MXene support not only provides more active sites to anchor Pt nanoclusters (NCs) but also increases the electrochemically active surface area. The electrochemical HER performance of the as-synthesized Pt NCs-MXene catalyst was investigated in an acid electrolyte. The results showed that at a current density of 10 mA cm−2, the overpotential and Tafel slope of the Pt NCs-MXene were 40 mV and 50.8 mV dec−1, respectively, lower than those of the commercial 20 wt% Pt/C catalyst. The turnover frequency and mass activity of the Pt NCs-MXene were 7.09 H2 s−1 and 7.02 A mgPt−1, respectively, which were approximately 70 times those of the Pt/C catalyst. Moreover, the developed catalyst also exhibited a stable hydrogen evolution current for 18 h in a long-term cycling test. This work can provide novel and nontoxic methods for the preparation of low-Pt loading electrocatalysts for high-efficiency HER.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lu Luo,Yalan Zhou,Wen Yan,Guanben Du,Mizi Fan,Weigang Zhao
The Ti 3 C 2 T x with excellent conductivity is used in a novel cobalt-based ZIF-67/Ti 3 C 2 T x composites, sulfide derivative (Co 3 S 4 /Ti 3 C 2 T x ) of which is then applied as an active supercapacitor material. The specific capacitance of ZIF-67/Ti 3 C 2 T x is significantly higher than that of unmodified ZIF-67. The sulfide-containing derivatives of these compounds demonstrated pseudocapacitance. The specific capacitance of an electrode containing Co 3 S 4 /Ti 3 C 2 T x as an active material is very high and equal to 602F/g at 1 A/g, which is 2.6 times higher than of a ZIF-67/Ti 3 C 2 T x -containing electrode. The supercapacitor based on Co 3 S 4 /Ti 3 C 2 T x maintained 81.6% of its original capacitance even at 10 A/g current density. Thus, the introduction of Ti 3 C 2 T x into the ZIF-67 improves not only the electrical conductivity of the hybrid material but also its structural stability, which allows to act as support. An asymmetric Co 3 S 4 /Ti 3 C 2 T x //AC supercapacitor (ASC) containing activated carbon (AC) as an anode showed a high energy density equal to 44.9 Wh/kg at 800.3 W/kg power density. This ASC also demonstrated high rate-performance (equal to 79.2%) and excellent cycling stability (with 88.3% capacitance retention and 99.23% Coulombic efficiency after 5000 cycles). The excellent electrochemical performance of our novel composite and conductivity, as well as the stability of its three-dimensional (3D) structure, make it a very promising material for energy storage applications.
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DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Jing Shang,Luhua Wang,Jihui Cao,Shitong Han,Chao Xu
Flexible devices have shown great application potential in portable and miniaturized devices. However, work on flexible electrodes for capacitive deionization (CDI) has not been well developed due to the issues of desalination property, processability , and availability under actual bending conditions. Herein, we constructed a kind of flexible lamellar MXene membrane by assembling Ti 3 C 2 T x sheets with both crumpled and perforated structures and studied their desalination performance in conventional planar and bent configurations. The crumpled and perforated features in Ti 3 C 2 T x (C-P-TC) nanosheets could optimize the in-plane and out-of-plane diffusion channels of the stacked samples, respectively, effectively improving the accessibility of membranes. As a result, the desalination performance of such C-P-TC electrodes was superior to that of those assembled from crumpled or perforated sheets alone. Significantly, this flexible C-P-TC electrode still showed excellent performance at real bend deformation, which possessed not only almost the same CDI capacity as the traditional planar configuration but also good cycling stability. This work not merely proposes an alternative strategy to improve the CDI performance of lamellar MXene electrodes by regulating the nanostructures of channels but also confirms their effective deionization ability under real bent state, greatly facilitating the potential use of flexible electrodes in miniaturized CDI devices.
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Houbao Liu,Renli Fu,Xinqing Su,Binyong Wu,He Wang,Yue Xu,Xuhai Liu
For new-generation miniaturized and high-frequency electronics, it is of vital importance to develop advanced electronic packaging materials, which combine high electromagnetic interference (EMI) shielding effectiveness (SE) and efficient thermal management capabilities, including heat absorption, thermal conductivity (TC) and heat dissipation. However, high EMI SE and efficient thermal management usually cannot complement each other for the same packaging material, because EMI shielding devices convert electromagnetic radiation directly into heat consumption, leading to consequent severe challenge to dispose heat dissipation. Herein, we have newly developed a high-performance phase change composites, in which MXene is confined in shape-stabilized phase change material (PCM) for simultaneous achievement of high EMI SE and efficient thermal management. Regarding high EMI, MXene can effectively shield electromagnetic radiation by converting the radiation into heat consumption. As for thermal management, PCM enables efficient heat absorption via the phase change process, and MXene enhances the thermal conductivity (TC) of MXene/PCM composite to facilitate heat dissipation. As a result, our developed MXene/PCM composite can achieve a high EMI SE of 64.7 dB in X-band, with an improved TC of 0.74 W/m·K. Furthermore, the interlayer capillary effect of MXene inhibits the leakage of liquid PCM during the solid-liquid phase transition, which can maintain the PCM shape stability. Our newly-designed shape-stabilized MXene/PCM composites with high EMI SE and large TC shed new light on designing EMI shielding materials with prolonged exposure to electromagnetic radiation, which can be envisioned to exhibit vast implications for advanced new-generation miniaturized and high-frequency electronics.
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DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Yanliang Zhou,Yicong Chai,Xiaoyu Li,Zihao Wu,Jian Lin,Yujia Han,Lin Li,Haifeng Qi,Yiming Gu,Leilei Kang,Xiaodong Wang
Selective oxidative dehydrogenation (ODH) of light alkanes to alkenes over metal oxides usually obeys a redox catalysis cycle, where the release and recovery of lattice oxygen play a key role in catalytic performance. Therefore, it remains a challenge to prepare metal oxides with limited reducibility, such as TiO2, as a dominant active component rather than as a support or modifier in this process. Here, we find a significant increase of ethane ODH performance over a layered TiO2 (M-TiO2) catalyst, which is in situ evolved from a Ti3C2Tx MXene material during the reaction. The reactivity of this M-TiO2 is 4 times higher than that of P25 TiO2, with an excellent ethylene productivity of 15.4 gC2H4 gcat–1 h–1 that outperforms the previously reported catalysts. Experimental characterizations and theoretical calculations reveal the importance of Ti and oxygen vacancy defects over M-TiO2 on the conversion of C2H6. The Ti vacancy sites can stabilize the defective structure and increase the reducibility of lattice oxygen to reduce the activation energy barrier of ethane, while the oxygen vacancy sites facilitate the activation of O2 to recover lattice oxygen.
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DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 45
·455501
·
IF 3.874
Hao Huang,Dan Wang,Ying Zhou,Dongping Wu,Xiaoning Liao,Wanming Xiong,Juan Du,Yanping Hong
Electrochemical sensor has great potential in the detection of small molecules by virtues of low cost, fast response, and easy to miniaturization. However, electrochemical sensing of ochratoxin A (OTA) was seriously hindered by the heavy electrode-fouling effect and poor electrochemical activity inherent from OTA molecular. Herein, two-dimensional titanium carbide (2D Ti3C2) MXene incorporated with carboxylic multiwalled carbon nanotubes (cMWCNTs) was developed as a glassy carbon electrode modifier for rapid and sensitive detection of OTA. Physical characterizations combined with electrochemical techniques revealed that cMWCNTs can not only prevent the restacking of 2D Ti3C2 nanosheets but also facile its electron transfer, leading to a nanohybrid with a high specific surface and good electrocatalytic activity to OTA. Under optimal conditions, the electrochemical sensor showed a good linear response to OTA in a concentration range from 0.09 to 10 μmol·l−1 and a low detection limit (LOD) of 0.028 μmol·l−1. The proposed sensor was impelled successive times to detect OTA, a good repeatability was obtained, indicating the constructed sensor possessed good anti-fouling property. Moreover, satisfactory recoveries between 91.8% and 103.2% were obtained in the real sample analysis of grape and beer, showing that the developed sensing technique is reliable for the screening of trace OTA in food resources.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 37
·12642-12649
·
IF 7.393
Di-Jie Yao,Zhenhua Tang,Li Zhang,Zhi-Gang Liu,Qi-Jun Sun,Song-Cheng Hu,Qiu-Xiang Liu,Xin-Gui Tang,Jianyong Ouyang
Electronic textiles (E-textiles) have received extensive attention for use in human motion detection, wearable electronics, and artificial intelligence. However, fabrication costs and methodology are still key issues preventing the commercialization of highly sensitive and wearable sensors. Here, simple to prepare low-cost conductive MXene-coated airlaid paper (MXene AP) sensors were fabricated via a dip-coating technique for use as electronic skin. The two-layer MXene AP sensors with a three-dimensional structure display high sensitivity (7.65 kPa−1 at 0–3.3 kPa), a broad sensing range (up to 300 kPa), and a stable response for more than 1000 cycles, presenting good sensitivity, repeatability, and durability, and their mechanism was investigated. Furthermore, origami technology can be used to fold MXene AP into an arbitrary shape with good sensing performance, and multistate conformational changes and simulated human touch can also be detected using the resultant three-dimensional (3D) MXene AP sensors. The wearable MXene AP sensors can be used to monitor human body motion and to collect human physical signals sensitively and accurately in the form of electronic skin. These strategies of folding and layering textile-decorated conductive nanomaterials provide a reference for next-generation textile-based wearable electronics and electronic skin.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 10
·3468-3479
·
IF 6.4
Yixin Cao,Chun Zhao,Tianshi Zhao,Yi Sun,Zhengjun Liu,Xianyao Li,Li Yin,Jiangmin Gu,Hao Ren,Xianwei Geng,Jian Yao,Lixing Kang
In the new generation of brain-like optoelectronic visual signal processing and artificial perception systems, floating-gate artificial synaptic devices based on two-dimensional materials represent a feasible route. However, the traditional optoelectronic floating-gate artificial synapse is hindered from further development due to complicated processes, such as the need to fabricate additional tunneling layers and photoresponsive layers. Here, an optoelectronic artificial synapse device based on an MXene floating-gate is fabricated. The self-grown TiO2 layer on the ‘111’ surface of MXene is a natural tunneling layer, enhancing the optical response intensity and memory time of postsynaptic currents. The device responds to photoelectric pulses and simulates basic synaptic properties, including excitatory postsynaptic current, paired-pulse facilitation, and short-term/long-term plasticity. In addition, the neural network based on the properties of the device was used to simulate the process of recognizing and classifying objects in the brain after receiving visual signals. Most importantly, as a proof of concept, simulation analyzes the brain wave signals when the brain receives different external stimuli and identifies the subject's mood by classifying the signals. These results indicate that the optoelectronic artificial synapse based on an MXene floating-gate is promising in the application of next-generation brain-like artificial synapse neuromorphic devices.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xingxing Li,Yanan Ma,Yang Yue,Guosheng Li,Chuankun Zhang,Minglei Cao,Yongchen Xiong,Jintao Zou,Yongheng Zhou,Yihua Gao
In recent years, the metal ion hybrid micro-supercapacitor (MSC) comprised of the battery-type Faradaic cathode based electrode and capacitor-type anode based electrode, can realize both high power and energy density, which becomes one of the most hottest areas of energy device. Herein, we demonstrated a zinc-ion hybrid micro-supercapacitor (ZIHMSC) by designing a Ti 3 C 2 T x MXene based electrode as capacitor-type anode and vanadium pentoxide (V 2 O 5 ) based electrode as battery-type cathode. In addition, the polyacrylamide (PAM) hydrogel where ZnSO 4 dissolved was chosen as the electrolyte, which effectively avoids the security risks, unlike other hybrid MSC based on the organic electrolytes. Meanwhile, the flexible ZIHMSC also exhibits well electrochemical properties, displaying a remarkable capacitance (129 mF cm −2 under 0.34 mA cm −2 ), high energy density (48.9 μWh cm −2 at 673 μW cm −2 ) and well-cycle stability (retaining ~ 77% capacitance after 10,000 cycles). This work supports a prospective routine for constructing the new-generation flexible micro-energy storage systems.
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DOI
高影响因子
Nanoscale Advances
·
2021
·Vol. 3
·期 19
·5683-5693
·
IF 4.553
Yue Zhu,Xingbin Zhao,Qingyu Peng,Haowen Zheng,Fuhua Xue,Pengyang Li,Zhonghai Xu,Xiaodong He
With the development of multifunction and miniaturization in modern electronics, polymeric films with strong mechanical performance and high thermal conductivity are urgently needed. Two-dimensional transition metal carbides and nitrides (MXenes) have attracted extensive attention due to their tunable surface chemistry, layered structure and charming properties. However, there are few studies on using MXenes as fillers to enhance polymer properties. In this paper, we fabricate a three-dimensional foam by the freeze-drying method to enhance the interfacial interaction between adjacent MXene sheets and polyimide (PI) macromolecules, and then a composite film with a dense and well-ordered layer-by-layer structure is produced by the hot-pressing process. Based on the secondary orientation strategy, the resultant MXene/PI film exhibits an enhanced thermal conductivity of 5.12 ± 0.37 W m−1 K−1 and tensile strength of 102 ± 3 MPa. Moreover, the composite film has good flexibility and flame retardancy owing to the synergistic effect of MXene sheets and PI chains. Hence, the MXene/PI composite film with the properties of flexibility, flame-retardancy, high mechanical strength and efficient heat transmission is expected to be used as the next thermal management material in a variety of applications.
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DOI
高影响因子
危险品化学品经营许可证（带存储）