INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2023
·Vol. 75
·期 5
·484-496
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IF 1.6
Ting Li,Xianggang Chen,Junhai Wang,Lixiu Zhang,Xinran Li,Xiaoyi Wei
PurposeThe purpose of this study is to prepare ZnFe2O4nanospheres, sheet MoS2and three ZnFe2O4@MoS2core-shell composites with various shell thicknesses, and add them to the base oil for friction and wear tests to simulate the wear conditions of hybrid bearings.Design/methodology/approachThrough the characterization and analysis of the morphology of wear scars and the elemental composition of friction films, the tribological behavior and wear mechanism of sample materials as lubricant additives were investigated and the effects of shell thickness and sample concentration on the tribological properties of core–shell composite lubricant additives were discussed.FindingsThe findings demonstrate that each of the five sample materials can, to varying degrees, enhance the lubricating qualities of the base oil and that the core–shell nanocomposite sample lubricant additive has superior lubricating properties to those of ZnFe2O4and MoS2alone, among them ZnFe2O4@MoS2-2 core–shell composites with moderate shell thickness performed most ideally. In addition, the optimal concentration of the ZnFe2O4@MoS2lubricant additive was 0.5 Wt.%, and a concentration that was too high led to particle deposition and affected the friction effect.Originality/valueIn this work, ZnFe2O4@MoS2core–shell composites were synthesized for the first time using ZnFe2O4as the carrier and the lubrication mechanism of core–shell composites and single materials were compared and studied, which illustrated the advantages of core–shell composite lubricant additives. At the same time, the influence of different shell thicknesses on the lubricant additives of core–shell composites was studied.Peer reviewThe peer review history for this article is available at:https://publons.com/publon/10.1108/ILT-12-2022-0367/
研究领域:
材料科学
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表面工程
·
纳米技术
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DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 41
·5960-5968
·
IF 2.6
Jie Wang,Feifei Lan,Zeyan Wang,Yingmin Wang,Baibiao Huang,Yujian Wang
Two-dimensional (2D) transition metal chalcogenides (TMDs) have demonstrated immense potential and broad prospects in advancing the fields of next-generation optoelectronics, spintronics, valley electronics, and traditional electronics. In recent years, significant progress has been made in the growth research of TMDs through continuous optimization and innovation of various synthetic strategies. However, precisely controlling the growth conditions of materials, synthesizing high-quality 2D materials with a single domain structure, and achieving the desired shape and performance standards remain complex scientific challenges. Here, we report on the study of MoS2 nucleation and growth habits by precisely controlling the ratio of molybdenum and sulfur sources during the growth process. Using pre-deposited highly oriented MoO2 nanorods as templates, two preferentially oriented (0° or 60°) MoS2 crystal domains were obtained on c-plane sapphire. Characterization using Raman spectroscopy, PL, XPS, and HRTEM reveals that the monolayer MoS2 continuous film, grown using this templating method, possesses superior quality. Our work demonstrates a method for directional growth of 2D MoS2 thin films using highly oriented 1D MoO2 nanorods as templates and precursors, providing new insights into orientation control for epitaxial growth of 2D TMD materials.
研究领域:
材料科学
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二维材料
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表面外延生长
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纳米结构制备
·
过渡金属硫族化合物
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Zhe Cui,Yangang Sun,Zhendong Zhang,Meilan Xu,Binjie Xin
A novel CC@MoS 2 -Ag 3 PO 4 heterostructure, composed of Ag 3 PO 4 nanoparticles decorated MoS 2 nanosheets on carbon fiber cloth (CC), is fabricated by a simple hydrothermal method and a successive ionic layer absorption reaction. The CC@MoS 2 -Ag 3 PO 4 heterostructure displays an excellent photocatalytic activity of ∼96% degradation rate for RhB solution under simulated daylight, which is more than 10 times as much as that of pure Ag 3 PO 4 or MoS 2 . The CC@MoS 2 -Ag 3 PO 4 heterostructure with optimized photoactivity is investigated by optical and electrochemical measurements. The CC@MoS 2 -Ag 3 PO 4 heterostructure can not only broaden the photoresponse range of MoS 2 , but also alleviate the photodegradation of Ag 3 PO 4 , and the easily separated CC provides a proper conductive substrate and rapid charge transfer channels. The probable photocatalytic mechanism of CC@MoS 2 -Ag 3 PO 4 heterostructure is discussed in detail. Therefore, the CC@MoS 2 -Ag 3 PO 4 heterostructure with high efficient photocatalytic performance and easy separation is a promising photocatalytic material.
研究领域:
材料科学
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光催化
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纳米材料
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环境化学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Waqar Uddin,Sajid ur Rehman,Muhammad Adnan Aslam,Shafiq ur Rehman,Mingzai Wu,Manzhou Zhu
Impedance matching has a key role in strong microwave absorption. To achieve the perfect impedance matching and enhanced interface dielectric relaxation, nickel-doped rGO@MoS 2 composite has been prepared. The complex permittivity and complex permeability of rGO@Ni-MoS 2 show significant improvement by the combination of the high magnetocrystalline anisotropy of Ni metal with highly conductive reduced graphene oxide, leading to remarkable microwave absorption. The prepared rGO@Ni-MoS 2 achieved maximum microwave absorption of −40 dB at 2 mm thickness. The control samples of MoS 2 , Ni-MoS 2 and rGO@MoS 2 indicate that micro-cluster of MoS 2 and Ni doping is indeed helpful to improve the performance of rGO@Ni-MoS 2 . The study provides a pathway for practical applications of microwave absorption materials in terms of impedance matching.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10483-10491
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IF 6.4
Lei Wang,Xiaohong Ji,Qinyuan Zhang
Enhancing the near-infrared (NIR) photoresponse of molybdenum disulfide (MoS2) is essential for its photoelectric applications including photo communication. Herein, continuous Er-doped MoS2 (MoS2:Er) films were synthesized via a multi-step process. The enhanced NIR response of MoS2:Er at 808 nm and 980 nm is attributed to the characteristic absorption of Er3+ at both wavelengths and the increased traps introduced by Er-doping. The developed MoS2:Er/SiO2/p-Si heterojunction device possesses a rapid response time of ∼1.4 μs, a high detectivity of ∼3.67 × 1010 Jones, and a wide 3 dB bandwidth of 7.9 kHz at −0.5 V under 980 nm laser irradiation. The dark current of the heterojunction photodetector can be suppressed under 980 nm laser illumination for a period longer than 8 ms because of an extra light-generated field in the dark induced by the residual charges in the traps. Meanwhile, a NIR light communication system is demonstrated by employing the heterojunction detectors as the receiver. This work provides an alternative method to synthesize homogeneous metal-doped MoS2 films and an effective strategy to modulate the photoelectric performance of MoS2-based devices.
研究领域:
材料科学
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光电子学
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纳米技术
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光电探测器
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半导体物理
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 5
·287
·
IF 1.784
Ding Simin,Xiao Xuling,Liu Shuhua,Wu Jie,Huang Zongyu,Qi Xiang,Li Jun
In this paper, MoS 2 /PbI 2 heterostructures were synthesized via a two-step synthesis method using vapor deposition and direct water bath heating. Raman spectroscopy and Atomic Force Microscope were used to characterize the MoS 2 /PbI 2 heterostructures. The Kelvin probe force microscope was characterized the surface potential of MoS 2 /PbI 2 heterostructures. It has shown that the surface potential has undergone a significant change transfer in the interlayer between MoS 2 and PbI 2 , which means that at the interface charge transfer occurs and the electrons transfer from MoS 2 to PbI 2 . These results provide a theoretical basis for further understanding of the electrical properties of MoS 2 /PbI 2 heterostructures.
研究领域:
材料科学
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纳米技术
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凝聚态物理
✓ 已验证
DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 3
·660
·
IF 3.4
Youqiang Xing,Yun Wang,Lei Liu,Ze Wu
As a major public health issue, early cancer detection is of great significance. A field-effect transistor (FET) based on an MoS2/C60composite nanolayer as the channel material enhances device performance by adding a light source, allowing the ultrasensitive detection of cancer-related miRNA. In this work, atomic layer deposition (ALD) was used to deposit MoS2layer by layer, and C60was deposited by an evaporation coater to obtain a composite nanolayer with good surface morphology as the channel material of the FET. Based on the good absorption of C60by blue-violet light, a 405 nm laser was selected to irradiate the channel material, improving the function of FET biosensors. A linear detection window from 10 pM to 1 fM with an ultralow detection limit of 5.16 aM for miRNA-155 was achieved.Keywords:ultrasensitive detection;FET;MoS2/C60composite nanolayer
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jinyang Wu,Mingjun Jing,Tianjing Wu,Mingguang Yi,Yansong Bai,Wenhui Deng,Yirong Zhu,Yingchang Yang,Xianyou Wang
Mo-based heterostructures offer a new strategy to improve the electronics/ion transport and diffusion kinetics of the anode materials for sodium-ion batteries (SIBs). MoO 2 /MoS 2 hollow nanospheres have been successfully designed via in-situ ion exchange technology with the spherical coordination compound Mo-glycerates (MoG). The structural evolution processes of pure MoO 2 , MoO 2 /MoS 2 , and pure MoS 2 materials have been investigated, illustrating that the structure of the nanosphere can be maintained by introducing the S-Mo-S bond. Based on the high conductivity of MoO 2 , the layered structure of MoS 2 and the synergistic effect between components, as-obtained MoO 2 /MoS 2 hollow nanospheres display enhanced electrochemical kinetic behaviors for SIBs. The MoO 2 /MoS 2 hollow nanospheres achieve a rate performance with 72% capacity retention at a current of 3200 mA g −1 compared to 100 mA g −1 . The capacity can be restored to the initial capacity after a current returns to 100 mA g −1 , while the capacity fading of pure MoS 2 is up to 24%. Moreover, the MoO 2 /MoS 2 hollow nanospheres also exhibit cycling stability, maintaining a stable capacity of 455.4 mAh g −1 after 100 cycles at a current of 100 mA g −1 . In this work, the design strategy for the hollow composite structure provides insight into the preparation of energy storage materials.
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DOI
PubMed
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·8937-8944
·
IF 9.9
Zhang Ruijie,Sun Yajing,Jiao Fei,Li Lin,Geng Dechao,Hu Wenping
As a new paradigm of material science, two-dimensional (2D) heterostructured composites have attracted extensive interests because of combining the collective advantages and collaborative characteristics of individual building blocks. Molybdenum disulfide (MoS 2 ) has demonstrated great promise as a low-cost substitute to platinum-based catalysts for electrochemical hydrogen production. However, the broad adoption of MoS 2 is hindered by its limited number of active sites and low inherent electrical conductivity. One of the promising methods to further activate MoS 2 is coupling engineering. Here, we demonstrate for the first time the synthesis of 2D MXene-MoS 2 nanocomposites through chemical vapor deposition (CVD) approach, thus leading to precise design in structure type and orientation. The computational results show that nanocomposites have metallic properties. Owing to their unique 2D/2D structure, MXene-MoS 2 nanocomposites exhibit more active catalytic sites, resulting in higher electrochemical performance, as inherited from parent excellent characteristics, and a much lower overpotential of ∼ 69 mV at a current density of 10 mA·cm −2 is achieved. This work paves the way to employ CVD method by coupling engineering to construct 2D nanocomposites for energy storage applications.
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DOI
高影响因子
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
·
2023
·Vol. 41
·期 3
·
IF 2.9
Cao Ming,Zhao Lan
The tribological properties of metal-CuS/MoS2 composite coatings were improved by selecting the metal materials and optimizing the heat treatment process. The composite coatings were prepared by magnetron cosputtering of copper or aluminum metals, CuS, and MoS2. Then, the prepared Cu-CuS/MoS2 and Al-CuS/MoS2 were subjected to vacuum heat treatment at 220, 320, and 420 °C. The structure and tribological properties of the composite coatings were analyzed by scanning electron microscope, energy spectrum, x-ray diffraction, Raman spectrum, and multifunction friction tester. The results showed an island-like growth and a dense noncylindrical cross-sectional morphology of the metal-CuS/MoS2 composite coating. Metal- and CuS-doped MoS2 solid solution is a practical component in composite coatings. The wear scar of the composite coatings showed different color layers at different annealing temperatures due to composition deviation. After heat treatment at 320 °C, the friction coefficient of Cu-CuS/MoS2 coating was reduced to a minimum of 0.08. After heat treatment at 420 °C, the Al-CuS/MoS2 coating showed three different color layers of wear scar, and good tribological properties were obtained. The friction coefficient of the Al-CuS/MoS2 coating was as low as 0.06, and the adhesion of the Al-CuS/MoS2 coating was expressed in the HF1 level. The results show that the vacuum heat treatment can stimulate the action of CuS by forming a solid solution with MoS2, complementing the missing S atom during the sputtering deposition of MoS2 and improving the lubrication of the composite coating. In addition, although the action mechanisms are different, Cu and Al doping are all conducive to obtaining composite coatings with better tribological properties.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Dapeng Sun,Run Li,Ming Wen,Xin Zhang,Min Chen,Haowei Yang,Denggao Guan,Cigang Xu,Guoshu Zhang
The development and application of nuclear energy involves a challenging process of separating H 2 O/HTO to treat tritium-containing radioactive wastewater (HTO). Recently graphene oxide (GO)-based membrane distillation process has shown good performance for the separation of H 2 O/D 2 O used as a laboratory model research process for H 2 O/HTO separation, but further development of novel membrane materials or structures for membrane distillation process to give higher permeation flux or separation factor is still desirable. Here, boron nitride (BN) and molybdenum disulfide (MoS 2 ) were investigated as membrane materials in the type of PTFE supported membrane, and PTFE/BN membrane showed higher permeation flux than PTFE/MoS 2 and PTFE/GO membrane, and higher separation factor than PTFE/GO membrane that was higher than PTFE/MoS 2 membrane. Furthermore, binary PTFE/BN/GO and PTFE/MoS 2 /GO heterostructure composite membranes were explored. The permeation flux of PTFE/BN/GO membrane was higher than that of PTFE/MoS 2 /GO and PTFE/GO/GO membrane. The separation factor of PTFE/BN/GO membrane was higher than that of PTFE/GO/GO membrane, which was higher than that of PTFE/MoS 2 /GO membrane. These results suggest that other 2D material- or heterostructure membranes can give performance comparable with or even better than GO membrane for the separation of H 2 O/D 2 O. This can guide for further exploration of novel materials or membrane structures for membrane distillation process with higher performance to provide a solution for the treatment of tritium-containing radioactive wastewater in the nuclear energy sector.
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DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yuanchu Zhu,Jing Yao,Lina Bai,Wenchao Zhang,Wei Wang,Xinzhi Ma,Lili Wu
Molybdenum disulfide (MoS2) is considered as a promising electrochemical catalyst for hydrogen generation. However, insufficient exposed active sites and poor conductivity severely impede its large-scale applications. Herein, the heterogeneous MoS2/CoS2 electrocatalyst was grown in situ on carbon cloth. The synergistic interaction between CoS2 and MoS2 occurring at the dense heterointerfaces grants the hybrid higher catalytic activities than single components, thereby speeding up hydrogen production rates. After annealing, the composite exhibits an ultralow overpotential of 67 mV at 10 mA cm–2 and a small Tafel slope of 70 mV dec–1 in 1 M KOH due to the improved conductivity and intimate connection between MoS2 and CoS2. Furthermore, it maintains an excellent cycle durability of 65 h without obvious attenuation at 20 mA cm–2. In-situ shielding tests reveal the main active sites coming from MoS2 rather than CoS2. On the basis of experimental measurements and theoretical calculations, CoS2 should work as the electron donor in the HER process and improve not only H2O adsorption but also H2 emission behaviors. The excellent hydrogen evolution performance of annealed-MoS2/CoS2/CC composite indicates that the present design is a prospective option for developing low-cost and efficient HER electrocatalysts in alkaline electrolytes.
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高影响因子
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