Materials Today Physics
·
2022
·
IF 11.021
Qiqin Liang,Jingjing Zhang,Xiaosi Qi,Lei Wang,Junfei Ding,Xiu Gong,Jingliang Yang,Yanli Chen,Yunpeng Qu,Qiong Peng,Wei Zhong
The selenylation/sulfuration of magnetic precursor brings about the great challenges to construct magnetic transition metal dichalcogenides (TMDs)-based multicomponent nanocomposites (MCNCs), which greatly hinders the improvements in magnetic loss ability and impedance matching characteristic. Theoretically speaking, the addition of carbon layer is conducive to protect the magnetic nanoparticles, optimize the impedance matching, strengthen the interfacial polarization and magnetic loss abilities, and so on. In order to verify these ideas, herein, we elaborately designed and produced core@shell ZnSe/FeSe 2 @MoSe 2 and core@shell@shell ZnFe 2 O 4 @C@MoSe 2 flower-like MCNCs. The results of comparative study indicated that the as-prepared ZnSe/FeSe 2 @MoSe 2 and ZnFe 2 O 4 @C@MoSe 2 with the different MoSe 2 contents and flower-like geometrical morphologies could be synthesized by regulating the amounts of Mo and Se sources. And the introduction of carbon layer not only effectively inhibited the selenylation of ZnFe 2 O 4 precursor, but also greatly improved the impedance matching characteristic, dielectric and magnetic loss capabilities. The obtained ZnFe 2 O 4 @C@MoSe 2 MCNCs presented the excellent comprehensive microwave absorption properties (MAPs) including strong absorption capability, broad frequency bandwidth and thin matching thickness. Therefore, our findings not only presented a simple and viable route to produce magnetic TMDs-based MCNCs, but also provided an effective strategy to boost their comprehensive MAPs.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 28
·2201906
·
IF 19.924
Wei Wu,Liping Tong,Han Zhou,Tongxiang Fan
Low infrared emissivity materials play a key role in thermal camouflage or retardation. Among these, fillers can be easily shaped into various flexible forms and normally provide an omnidirectional and polarization-insensitive emissivity. However, conventional fillers suffer from drawbacks of full-waveband ultrahigh reflectivity, unsatisfactory thermal camouflage performances, or poor chemical/thermal stabilities. Herein, 2D MoSe 2 is discovered as a new semiconductor with intrinsic low infrared emissivity after first-principle density functional theory calculation and experimental demonstration on eight types of two-dimensional materials (2DMs). Mechanisms of electron–photon reflection and phonon–photon absorption for the low infrared emissivity are proposed. A two-step microwave-assisted amination process is developed to exfoliate the nanosheets and obtain a desired low infrared emissivity. The as-obtained chitosan modified MoSe 2 (CS@MoSe 2 ) has an ultrahigh spectral reflectivity of 78%–86% in 8–14 µm, and its resin-based coating still exhibits a low infrared emissivity of 0.32 and shows a dramatic reduction in radiation temperature of 28 °C for a hot object at 70 °C. Besides, CS@MoSe 2 can endure a high temperature of 220 °C and is demonstrated with a long-term thermal camouflage efficiency in hot environments. This work will guide 2DMs selection and preparation toward desired infrared radiation properties to satisfy numerous applications.
研究领域:
材料科学
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纳米技术
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热力学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chao Yu,Zhanfang Cao,Shuang Chen,Shuai Wang,Hong Zhong
Designing of catalysts with high activity and earth abundance which can further enhance the electrocatalytic hydrogen evolution performance so as to improve the hydrogen production efficiency. In this paper, we synthesized 1T-MoSe 2 -Se/MgAl-LDH composites by in-situ hydrothermal reduction method. The high proportion 1T phase (73.73%) of ultra-thin layer 1T-MoSe 2 -Se was obtained by acid dissolution operation, which can be ascribed to the limiting growth effect of MgAl-LDH. Compared to Pure MoSe 2 , it dramatically improved HER catalytic activity. the optimal 1T-MoSe 2 -Se (24 h) exhibits superior HER performance with a small overpotential (122 mV at the current density of 10 mA cm −2 ) and Tafel slope (54 mV dec −1 ) as well as excellent electrochemical stability. The introduction of Se can promote the conductivity of 1T-MoSe 2 -Se catalyst. Moreover, the best electrocatalytic hydrogen evolution performance can be exhibited synergistically only when the optimal match between MoSe 2 and Se is achieved, which are confirmed by XPS analysis and HER test results.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Qing Zhang,Wanzhen He,Lin Li,Dechao Geng,Zhiping Xu,Huipeng Chen,Wei Chen,Wenping Hu
The etching process can serve as an effective top-down approach that facilitates direct construction of tuned patterns, reversely studying growth mechanisms and further inducing unexpected physical properties. Currently, etching behaviors of monolayer transition-metal dichalcogenides (TMDs) have been rarely explored and the intrinsic etching mechanism still needs to be fully elucidated. Here, we demonstrate a facile and controllable oxygen-assisted anisotropic chemical etching of two-dimensional (2D) materials. Taking MoSe2 as an example, a series of well-defined etched patterns can be fabricated by precisely modulating the pretreatment time of oxygen plasma and the etching time. Atomic characterization exhibits that the edges of etched patterns are mainly zigzag-terminated. Density functional theory calculations highly agree with the experimental results, indicating an energy preference for zigzag edges. The as-produced MoSe2 flakes can be used as part of heterojunctions to display intriguing optoelectronic properties. The field-effect transistor based on as-etched MoSe2 flakes and the 2D poly(3-hexylthiophene-2,5-diyl) crystal shows a distinct enhanced ambipolar photoresponse. Our strategy offers a new direction for preparing patterned 2D TMDs with desirable characteristics, opening the door for facilitating the development of optoelectronics.
研究领域:
材料科学
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物理化学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yan An,Xiaoping Hu,Xinyu Wang,Jian Tian
Solar energy conversion into hydrogen (H 2 ) energy has attracted much attention. However, the low light utilization rate and fast carrier recombination of photocatalysts extremely limit the practical application of photocatalytic H 2 production. In this paper, MoSe 2 -NiSe with abundant active sites and interfacial electronic structures as dual co-catalysts were assembled on g-C 3 N 4 nanosheets (NSs) vis a solvothermal reaction process. MoSe 2 -NiSe/g-C 3 N 4 NSs composite exhibited improved light absorption and photoelectrochemical properties. The photocatalytic H 2 production rate of MoSe 2 -NiSe/g-C 3 N 4 composite achieved 2379.04 μmol·h −1 ·g −1 , which is 99.25, 1.44, and 3.67 times those of pure g-C 3 N 4 nanosheets (23.97 μmol·h −1 ·g −1 ), MoSe 2 /C 3 N 4 (1654.57 μmol·h −1 ·g −1 ), and NiSe/C 3 N 4 (649.08 μmol·h −1 ·g −1 ), respectively. The apparent quantum efficiency (AQE) value of MoSe 2 -NiSe/g-C 3 N 4 achieved 4.07 % under light at λ = 370 nm. The corresponding characterization and experiments proved that 2D ultrathin g-C 3 N 4 NSs with a large surface area and short charge-transfer distance could facilitate light scattering and the transport of photoexcited electrons. MoSe 2 -NiSe, as a dual co-catalyst, showed strong electronic synergistic interaction between the interfaces, thus improving the conductivity and promoting the electron transfer process.
研究领域:
材料科学
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能源化学
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光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Electronic Materials
·
2024
·Vol. 10
·期 8
·2300842
·
IF 5.3
Mingyuan Sheng,Xi Chang,Xiaojun Mao,Yang Gao,Xiaoyang Xuan,Haifen Xie,Haichuan Mu,Yueping Niu,Shangqing Gong,Min Qian
The heterostructure of two-dimensional transition metal dichalcogenide (TMDC) has garnered extensive attention, for the junction is the building block of a semiconductor device. However, the controllable synthesis of TMDC heterostructures of different transition metals and different chalcogen elements is still challenging because of the etching by atom substitution during the chemical vapor deposition (CVD) process. Here, a Mo─O transition state with lower energy is introduced to the edge of an as-grown MoSe 2 by using ultraviolet ozone treatment, to prevent the fast atom substitution of S for Se, and enable a stable growth of WS 2 /MoSe 2 lateral heterostructure. A polymer-free transfer method is developed based on capillary interaction, and atomic structure characterization confirms the high-quality WS 2 /MoSe 2 lateral heterostructure. The WS 2 /MoSe 2 lateral heterostructure photodetector exhibits superior photoresponse compared to WS 2 and MoSe 2 devices, with a responsivity of 21.87 A W −1 and a detectivity of 4.2 × 10 12 Jones at 350 nm. Kelvin probe force microscopy result reveals that the built-in electric field within the heterojunction facilitates the effective separation of photogenerated electron-hole pairs. This study carries profound implications for the CVD growth and polymer-free transfer of TMDC heterostructures in photodetector applications.
研究领域:
材料科学
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半导体物理
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光电探测器技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Chengzhi Wei,Wenrui Wu,Yang Yang,Yue Yan,Hao Zhang,Xianfu Li
In this study, MoSe2 and NiFe-LDHs were synthesized on a self-supported conductive nickel foam (NF) substrate via a one-step method. Specifically, MoSe2 was grown on the nickel foam via a one-step solvothermal method to form the MoSe2/NF precursor material. Subsequently, NiFe-LDHs were deposited on the MoSe2/NF substrate through a one-step hydrothermal method, resulting in the formation of the NiFe-LDHs/MoSe2/NF composite material. We found that although both NiFe-LDHs and MoSe2 monomers have certain disadvantages, such as a tendency to agglomerate and relatively poor electrical conductivity, their combination yields an interesting “two negatives make a positive” effect. The NiFe-LDHs/MoSe2/NF composite exhibits a high specific capacitance of 6790 mF cm–2 at a current density of 2 mA cm–2, which is significantly higher than that of NiFe-LDHs (1317.6 mF cm–2) and MoSe2 (1475.2 mF cm–2). Additionally, the composite demonstrates excellent cycling stability, with a capacitance retention of 99.87% after 4000 cycles. In contrast, NiFe-LDHs/NF retains only 54.01% of its capacitance after 2000 cycles, and MoSe2/NF retains only 48.15% after the same number of cycles. The asymmetric supercapacitors (ASCs) assembled from the NiFe-LDHs/MoSe2/NF composite and activated carbon (AC) show remarkable performance. These devices have a high potential window of 0–1.55 V and achieve an extremely high energy density of 0.5558 mWh cm–2 at a power density of 1.55 mW cm–2. Moreover, they exhibit an ultrahigh capacitance retention of 99.1% after 10,000 cycles, indicating excellent cycling stability. The Coulombic efficiency of the capacitor remains at a high value of approximately 99.8% throughout the cycling process. NiFe-LDHs/MoSe2/NF and similar materials can be designed for flexible supercapacitors integrated into clothing or skin patches to power sensors. In the context of medical device designs requiring energy storage components to rapidly release substantial energy, they may also play a critical role.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shuaiqiang Liu,Yu Li,Yan Yue,Xingxing Jiang,Chuanmin Ding,Junwen Wang,Donghong Duan,Qinbo Yuan,Xiaogang Hao,Shibin Liu
Oxygen evolution reaction (OER) is an important half-reaction of many actual processes, which has the slow kinetics of four-electron process. Interface engineering as an effective method can accelerate the slow kinetics of oxygen evolution reaction. In this paper, CoSe 2 –MoSe 2 porous nanosheet arrays with heterostructures were synthesized on carbon cloth by ion exchange and vapor phase selenization using Co-MOF as template. Due to the porous two-dimensional structure, the electron diffusion path is shortened and the self-supporting electrode has excellent conductivity. When catalyzing OER in 1 M KOH solution, the CoSe 2 –MoSe 2 delivers an overpotential of 278 mV at 10 mA cmm 2 , and Tafel slope of 61.2 mV dec −1 , making catalytic activity a better result than commercial RuO 2 . In addition, the decay of the catalytic activity is negligible after 24 h of continuous electrolysis. This work provides a method for the design of porous bimetallic selenide self-supporting oxygen evolution electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2025
·Vol. 36
·期 13
·135402
·
IF 2.8
Yao He,Lijing Wang,Sheng Yang,Shaowei Zhang,Hongfang Du,Dandan Cui,Liangxu Lin
In lithium–sulfur batteries (LSBs), the dissolution of lithium polysulfides (LiPSs) triggers the shuttle effect to lose active materials irreversibly, leading to the fast deterioration of electrochemical performance. Rational designs on the separator membrane could mitigate the shuttle effect. However, the development of efficient separators economically remains a challenging task, aggressively limiting the commercial use of LSBs. This work reports the engineering of commercial molybdenum diselenides (MoSe2) flakes to mitigate the shuttle effect of LSBs, by forming rich Se vacancies via a potassium (K) intercalation and de-intercalation reaction. The Se vacancy in MoSex flakes significantly enhances the adsorption capacity of LiPSs and accelerates the Li+ diffusion kinetics, thereby alleviating the shuttle effect and enhancing the energy storage performance. This directly improves the energy storage performance of the LSBs by incorporating the MoSex flakes into the separator membrane, giving a high capacity retention rate of 94.6% at 2 C after 500 cycles, with a reversible specific capacity as high as 452 mAh g−1. This work offers a new strategy for the design and synthesis of vacancy rich transition metal chalcogenides for high-performance LSBs and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruitian Yan,Wenjie Zhao,Xiaoyang Duan,Taolin Yu,Weiping Cui,Weidong Quan,Yinsheng Chen,Dan Xu
Recently, MoSe 2 has exhibited limited development in the field of gas sensors owing to its low sensitivity and slow response/recovery. Herein, various noble metals (Pt, Pd, and Ag) were employed to dope the MoSe 2 nanoflower for enhancing its sensing capability to NO 2 . Compared to Ag and Pd modification, the Pt doped-MoSe 2 sensor displayed higher sensitivity, faster response rate, and better selectivity. Moreover, the 2.5 %Pt-MoSe 2 sensor had a large sensitivity of 2.45 to 32 ppm NO 2 , good repeatability, and a low detection limit of 0.1 ppm at 110 °C. The improvement in the gas-sensing response can be attributed to the spillover effect and catalytic sensitization of Pt. Moreover, the first principle calculations for the adsorption energy and density of states have confirmed that the MoSe 2 material can adsorb NO 2 more effectively by Pt doping. The Pt-decorated MoSe 2 material exhibits a promising prospect in the field of NO 2 gas detection.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Tengfei Wang,Qing Pang,Boyu Liu,Hongyu Wang
In recent years, molybdenum diselenide (MoSe2) nanomaterials have been proven to be promising electromagnetic wave (EMW) absorbers, attributed to the formation of a heterogeneous interface between the 2H semiconductor phase and the 1T metal phase during its preparation. However, the difficulty in precisely controlling the two-phase ratio and the complexity of the process hinder its further development. In this work, we constructed a simple phase engineering strategy based on the regulation of reducing agent concentration, achieving a regulation of the 1T phase proportion in defective 1T/2H-MoSe2 nanomaterials (ranging from 67.91 to 41.45%) by accurately adjusting the amount of NaBH4 added. The findings indicate that the material exhibits excellent microwave absorption performance when the 1T phase proportion reaches 53.55% (1T/2H-MoSe2-2), demonstrating a minimum reflection loss (RLmin) of −40.0 dB, and the effective absorption bandwidth (EAB) covers 6.08 GHz (11.92–18.0 GHz) when the thickness is 2.6 mm. The enhancement in performance results from a synergistic balance mechanism established by the abundant 1T-2H heterogeneous interface, which induces interfacial polarization loss, along with a moderately enhanced conductive loss in the 1T/2H-MoSe2-2 nanomaterial. Furthermore, radar cross-section (RCS) simulation results confirm the dramatic dissipation ability of absorbers for EMW in practical applications. This strategy paves the way for designs of interfaces and the control of the performance of absorbing nanomaterials based on transition-metal dichalcogenides (TMDs).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Science-Advanced Materials and Devices
·
2022
·
IF 7.382
Xu Ji,Man Li,Jianjun Guo,Yunying Pan,Lijun Meng,Shuang Cheng
Durability and capacity of electrode materials, especially the anodes, are the main challenges for aqueous Li-ion batteries. In this work, MoSe 2 micron flowers have been synthesized and investigated as anodes for Li + storage in LiCl aqueous-based electrolytes. In the LiCl solution, the working potential of the MoSe 2 anode can reach −1.0 V (vs Ag/AgCl). Yet, its reversible capacity is only ∼14 mAh g −1 (50 C g −1 ), owing to the absence of Faradaic reactions and the fast deformation of MoSe 2 . After gelation of the LiCl solution using poly vinyl alcohol (PVA), the activity of water is largely inhibited, and the operating potential is broadened to −1.2 V. In this gel system, the Faradaic reaction of the MoSe 2 anode is triggered, and hence its capacity is largely enhanced. With a suitable amount of PVA (LiCl/PVA-20), the MoSe 2 electrode can deliver reversible capacities of high as 157 mAh g −1 at 1 A g −1 , and 139 mAh g −1 at 2 A g −1 , and still high as 100 mAh g −1 after 50 cycles, indicating relative good stability. Using commercial LiMn 2 O 4 as cathode, a full aqueous Li-ion battery was assembled, and a high discharge voltage of ∼1.8 V can be achieved. It is found that not only the activity of water but also the morphology change of the MoSe 2 during cycling is inhibited in the gel electrolyte.
研究领域:
材料科学
·
电化学
✓ 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）