CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hou-Qing Wang,Jing-Wen Wang,Xin-Zhu Wang,Xin-Hua Gao,Guo-Chao Zhuang,Jian-Bao Yang,Hua Ren
Hybrid nanofillers designed for polymer dielectric nanocomposites are expected to obtain excellent dielectric energy storage performance by virtue of different morphologies and electrical properties. In this work, the 2D/2D heterostructures of 2D MoS 2 grown on the surface of 2D transition metal carbide Ti 3 C 2 MXene (MoS 2 @MXene) have been successfully obtained through hydrothermal reaction. MoS 2 @MXene was incorporated into poly (vinylidene fluoride) (PVDF) to form the PVDF based dielectric composites (MoS 2 @MXene/PVDF) through solution casting method. The composite with 3.47 wt% MoS 2 @MXene is very flexible with an elastic modulus of 385 MPa, which is not much different with pure PVDF (357 MPa). The maximum electric displacement at room temperature and an electric field of 400 MV/m is 10.96 μC/cm 2 , moreover the discharged energy density reaches 17.22 J/cm 3 , which is nearly 4.5 times that of pure PVDF (3.83 J/cm 3 at the maximum electric field of 250 MV/m). The dielectric constant of 3.47 wt% MoS 2 @MXene/PVDF at room temperature and 10 3 Hz is 24.3, and the loss is only 0.02. Even though the filler content is increased to 12.51 wt%, the loss is only 0.06, and the dielectric constant of the composite film can reach 145.2. Compared with the blend of PVDF and MXene, the dielectric constant of MXene@MoS 2 /PVDF shows more excellent frequency stability and lower dielectric loss.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Kaiyu Liu,Hongwei Zhang,Yutong Qin,Chuntao Lan,Hao Jia
Developing high-performance electromagnetic interference (EMI) shielding materials with robust microwave attenuation capabilities and structural stability remains a formidable challenge to enhance their practical adaptability in everyday scenarios. In this study, we have successfully fabricated a gradient structured MXene-based composite film tailored for high-performance EMI shielding. Initially, a hybrid MoS 2 @MXene material featuring heterointerfaces is synthesized, which exhibits exceptional electromagnetic wave (EMW) absorption capabilities. Subsequently, a gradient structured multi-layer film is engineered using a layer-by-layer casting approach, gradually increasing the MXene content in the MoS 2 @MXene/MXene/aramid nanofiber composite. This composite film is purposefully designed to employ an “absorb-reflect-reabsorb” EMI shielding mechanism, resulting in reduced reflection power. The resultant composite film achieves an impressive EMI SE of 50.9 dB, coupled with remarkable structural stability persisting through 500 folding cycles. This study presents a viable and potent strategy for developing flexible, absorption-dominant EMI shielding materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lin Jin,Lin Zhang,Hao Liang,Yuhui Ao,Song Wang,De Sun
Solar-driven interfacial water evaporation is often regarded as a promising method for producing fresh water from seawater. However, developing an evaporator with an ideal evaporation rate and efficient seawater desalination capabilities remains a significant challenge, especially when considering the mechanical performance requirements in large-scale practical use. Based on this, this work proposed a Janus-structured 3D carbon fiber (CF)-reinforced solar-driven evaporator fabricated through a vacuum-assisted infusion process (VAIP). A heterogeneous structure of 1 T MoS 2 -MXene, formed through ion embedding, was adorned on the surface to serve as an efficient photothermal conversion material. Due to the synergistic advantages, the Janus 1 T MoS 2 -MXene/ CSA/CF (JMMC) evaporator achieved excellent solar absorption efficiency of 94 % in the range of 200–2500 nm. The evaporator exhibited an evaporation enthalpy as low as 1556.4 kJ·kg −1 , which facilitated the escape of water molecules at the interface. The JMMC evaporator delivered a high evaporation rate of 2.29 kg m -2 h −1 and an efficiency of 93.8 % under the irradiation of 1 sun (1.0 kW/m −2 (−|-)). The influence of the heterogeneous structure of 1 T MoS₂-MXene on the water evaporation rate was thoroughly assessed through molecular dynamics simulations. Besides, the mechanical performance of this evaporator was highly satisfactory, rendering it suitable for application in demanding and complex usage environments. Furthermore, its remarkable conductivity facilitated an excellent Joule heating effect even at low voltages, enabling water evaporation under challenging circumstances such as overcast skies or indoor settings. The versatility of this scalable evaporator holds great promise for addressing the issue of freshwater scarcity.
研究领域:
材料科学
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环境工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Haonan Zhai,Huibin Liu,Yufen Zhang,Jinjin Wen,Wenyue Yang,Huiting Xu,Xiaoteng Yan,Wenchao Peng,Jiapeng Liu
Aqueous zinc ion batteries (AZIBs) are now gaining widespread attention because of their cost-effectiveness, intrinsic safety, and high theoretical capacity. Nevertheless, it is still crucial to exploit high-performance electrode materials. Herein, the freestanding 1T MoS 2 @Mxene hybrid films (MMHF) were synthesized and directly served as the cathode of AZIBs. The freestanding MMHF exhibited the hierarchical layer structure with excellent conductivity and strong interfacial interaction, which promoted the exposure of more active sites and the transfer of electrons/ions. Consequently, the MMHF displayed a high specific capacity of 270 mAh g –1 (at 0.1 A g –1 ) and good rate performance. Impressively, even after 2500 cycles under 10 A g –1 , the freestanding MMHF cathode contributed a superior specific capacity of 108 mAh g –1 with an outstanding capacity retention rate of 94.7 %. Meanwhile, the energy storage mechanism of the MMHF electrode was also elucidated through ex-situ characterizations. Furthermore, the density functional theory (DFT) computations revealed the strong interfacial interactions between 1T MoS 2 and MXene, high conductivity, and low Zn 2+ diffusion barrier. This work provides a new viewpoint for designing freestanding transition metal disulfides (TMDs) -MXene hybrid film electrodes for AZIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhicai Yu,Lele Huang,Mi Zhou,Jie Xu,Jianchao Ma,Yuhang Wan,Qing Jiang,Xueru Qu,Hualing He
Early fire warning represents an effective mean in the face of fire that can remind people in timely manner to adopt effective countermeasures before the occurrence of fire. Despite the encouraging progress of current early fire-warning sensors, a more sensitive monitoring of early fires in multiple aspects remains challenge. Herein, a dual-mode core-sheath structured SnO 2 /MoS 2 @MXene@ANFs (SMA) early fire warning sensor fiber was prepared by coaxial wet spinning technology. The core-layer of SMA fiber comprised the thermoelectric material Ti 3 C 2 T X MXene, whereas the shell-layer comprised the gas-sensitive SnO 2 /MoS 2 and silver nanowires (Ag NWs) along with aramid nanofibers (ANFs). The robust and flame-retardant ANFs served as protective shell, safeguarding the stability and flexibility of the temperature and gas sensing functions within the fiber. Based on the thermoelectric performance of MXene, there is a linear relationship between the output voltage and temperature difference of SMA fiber, which can achieve wide range of temperature sensing from 50 to 300 ℃ and accurately identify abnormal temperature increases in the environment. Simultaneously, The bridging effect between one-dimensional Ag NWs and SnO 2 /MoS 2 enhances the sensing capability of fiber for CO (R 0 /R = 1.43@100 ppm). In addition, an early fire warning system based on SMA fiber has been established, which can sensitively detect the flames (≤4 s). This system can also be used for monitoring CO gas in fire environments, guiding firefighters’ rescue actions, expanding the application scope of early fire warning sensors in the past, and opening up new directions for the development of intelligent early fire sensors in the future.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2101988
·
IF 17.521
Junjie Yang,Jianqiao Wang,Huiqin Li,Ze Wu,Youqiang Xing,Yunfei Chen,Lei Liu
In the design of electromagnetic (EM) wave absorbing materials, it is still a great challenge to optimize the relationship between the attenuation capability and impedance matching synergistically. Herein, a 3D porous MoS 2 /MXene hybrid aerogel architecture with conformal heterogeneous interface has been built by atomic layer deposition (ALD) based on specific porous templates to optimize the microwave absorption (MA) performance comprehensively. The original porous structure of pristine Ti 3 C 2 T x aerogel used as templates can be preserved well during ALD fabrication, which prolongs the reflection and scattering path and ameliorates the dielectric loss. Meanwhile, plenty of heterointerfaces between MoS 2 and Ti 3 C 2 T x have been fabricated based on conformally ALD-deposited MoS 2 with controlled thickness on the porous surfaces of the templates, which can effectively optimize the impedance matching and transform its response to EM waves from shielding into absorbing. Moreover, the interaction between the attenuation capability and impedance matching can also be modulated by the number of ALD cycle in MoS 2 fabrication. After optimization, MoS 2 /MXene hybrid aerogel obtained under 300 ALD cycles shows a minimum reflection loss of −61.65 dB at the thickness of 4.53 mm. In addition, its preferable lightweight, high surface area, mechanical, and hydrophobicity properties will also be conducive to further practical applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xinyi Zhang,Haiting Shi,Liangsen Liu,Chunying Min,Shuaitong Liang,Zhiwei Xu,Yanling Xue,Chunxia Hong,Zhijiang Cai
Molybdenum disulfide (MoS 2 ) has possession of a layered structure and high theoretical capacity, which is a candidate anode material for sodium ion batteries . However, unmodified MoS 2 are inflicted with a poor cycling stability and an inferior rate capability upon charge/discharge processes. Considering that the shape and size of anode materials play a key role in the performance of anode materials, this paper proposes a multi-level composite structure formed by the micro-nano materials based on self-assembled molybdenum disulfide (MoS 2 ) nanoflowers , Mxene and hollow carbonized kapok fiber (CKF). The micro-nano materials can be connected to form heterojunction and agglomeration can be avoided. The load bearing of heterostructure and stress release of CKF are coordinated to form a double protection mechanism, which improves the conductivity and structural stability of hybrid materials . Based on the above advantages, it has higher specific capacity than pure MoS 2 , and has better rate performance (639.3, 409.5, 386.2, 372, 338, 422.8 and 434.7 mAh g −1 at the current density of 0.05, 0.1, 0.2, 0.5, 1 ,0.1 and 0.05 A·g −1 , respectively). The stress-modulated strategies can provide new insights for the design and construction of transition metal sulfides heterostructures to achieve high performance sodium ion batteries .
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 15
·2206494
·
IF 15.1
Shaowei Xie,Xiaochen Fei,Jiayi Wang,Yi-Cheng Zhu,Jiazhou Liu,Xinxing Du,Xuesong Liu,Liang Dong,Yinjie Zhu,Jiahua Pan,Baijun Dong,Jianjun Sha,Yu Luo,Wenshe Sun,Wei Xue
High-throughput metabolic fingerprinting has been deemed one of the most promising strategies for addressing the high false positive rate of prostate cancer (PCa) diagnosis in the prostate-specific antigen (PSA) gray zone. However, the current metabolic fingerprinting remains challenging in achieving high-precision metabolite detection in complex biological samples (e.g., serum and urine). Herein, a novel self-assembly MoS 2 /MXene heterostructure nanocomposite with a tailored doping ratio of 10% is presented as a matrix for laser desorption ionization mass spectrometry analysis in clinical biosamples. Notably, owing to the two-dimensional architecture and doping effect, MoS 2 /MXene demonstrates favorable laser desorption ionization performance with low adsorption energy, which is evidenced by efficient urinary metabolic fingerprinting with an enhanced area under curve (AUC) diagnosis capability of 0.959 relative to that of serum metabolic fingerprinting (AUC = 0.902) for the diagnosis of PCa in the PSA gray zone. Thus, this MoS 2 /MXene heterostructure is anticipated to offer a novel strategy to precisely and noninvasively diagnose PCa in the PSA gray zone.
研究领域:
医学诊断
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yihao Fan,Zihao Liu,Qingyan Li,Kehan Zhao,Mudasir Ahmad,Pei Liu,Qiuyu Zhang,Baoliang Zhang
In this paper, a MoS2/MXene/N-doped carbon (NC) porous composite microsphere with a wrinkled surface was designed and constructed. Lithium fluoride exfoliation and lithium-ion etching fabricated two types of 2D assembly elements, MXene (Ti3C2Tx) and MoS2 nanosheets. The two nanosheets were self-assembled by an ultrasonic spray technique with high-temperature reduction, and MoS2/MXene microspheres with 3Dwrinkled shapes were obtained. The coating of the surface NC layer was achieved by the carbonization of a polydopamine (PDA) precursor formed by the self-polymerization of dopamine. The amount of PDA coating and raw material ratio significantly affect the microstructure and electromagnetic wave absorption performance. The optimal MXene to MoS2 mass ratio is 5:1, and the optimal coating time and filler amount are 8 h and 40%. MoS2/MXene/NC composite microspheres exhibit excellent absorption performance with low reflection losses (RLmin) of −52.9 dB at 6.4 GHz and high adequate absorption bandwidths of 5.2 GHz. By adjusting the thickness of the absorber, the full coverage of the C–Ku band (4–18 GHz) can be achieved. As a new composite absorber, it has significant potential applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Chang Liu,Huan Zhang,Qinghan Wang,Jie Wu,Peng Chen,Shaoxian Song,Chun Zhan,Lei Wang,Feifei Jia
Thiosulfate technique is the most promising method to recover gold from electronic waste (e-waste) and natural ores due to its non-toxicity and high leaching efficiency. However, the bad affinity between Au(S 2 O 3 ) 2 3− and traditional adsorbents leads to unsatisfied gold recovery performance from leaching solution . In this work, highly efficient recovery of gold from low concentrated Au(S 2 O 3 ) 2 3− solution was achieved through enhanced photocatalysis process on a novel MoS 2 /MXene/Ag adsorbent. During recovery procedure, Au(S 2 O 3 ) 2 3− was in-situ reduced to Au 0 by photogenerated electrons and then anchored on MoS 2 /MXene/Ag. Under Au(S 2 O 3 ) 2 3− concentration <10 ppm, over 99 % gold recovery performance could achieve within 2 h. Experimental tests have proved that MXene made fully use of near infrared (NIR) light energy to exhibit better photothermal effect, and surface plasmon resonance (SPR) effect of Ag can simultaneously facilitate the separation of electron-hole pairs on MoS 2 . By means of external temperature input and rapid charge carrier transmission, plenty of electrons were excited from MoS 2 /MXene/Ag for Au(S 2 O 3 ) 2 3− recovery. This work paved a pathway for efficient Au(S 2 O 3 ) 2 3− recovery, which catered to the demand for green production of gold in the future.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）