TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Hengyang Liu,Yong Xu,Enzhu Hu,Kunhong Hu
Finding ways to improve the performance of additives is critical to meeting the industrial demand for high-performance lubricants. A WS 2 /MoS 2 micro-nano composite was synthesized by coating nano-MoS 2 onto activated micro-WS 2 to enhance nano-MoS 2 lubrication. The WS 2 /MoS 2 in base oil significantly reduced the wear by 65.3 % and 46.4 % compared to micro-WS 2 and nano-MoS 2 , respectively. In the WS 2 /MoS 2 , WS 2 isolates and lubricates the friction pair through its layered structure, but contributes minimally to tribofilm formation. Nano-MoS 2 , with its high reactivity, exfoliates into nanosheets that transfer to the friction surface to form the tribofilm, working alongside compounds like Fe 2 (SO 4 ) 3 and Fe 3 O 4 to enhance lubrication. This work provides a way to improve the performance of lubricants and demonstrates potential applications in lubricating oil modification.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Lubricants
·
2025
·Vol. 13
·期 2
·61
·
IF 2.9
Tiancheng Ye,Kai Le,Ganggang Wang,Zhenghao Ren,Yuzhen Liu,Liwei Zheng,Hui Tian,Shusheng Xu
To improve the friction performance and service life of protective coatings in humidity-fluctuating environments, porous hard titanium nitride (TiN)–molybdenum disulfide (MoS2) composite coatings were prepared by using direct current magnetron sputtering (DCMS) with the mode of oblique angle deposition (OAD) and chemical vapor deposition (CVD) technologies. The structure and chemical component were characterized by field emission scanning electron microscopy (FESEM), energy dispersive spectrometer (EDS), grazing incidence X-ray diffraction (GIXRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The tribological properties of these TiN–MoS2composite coatings were investigated. The results indicate that the porous TiN–MoS2composite coating exhibited outstanding friction performance and long service life under humidity-fluctuating environments. At the initial 20% relative humidity (RH) stage, the MoS2on the porous TiN–MoS2composite coating surface worked as an effective lubricant; thus, the coating demonstrated excellent lubrication performance, and the friction coefficient (COF) was about 0.05. As the humidity was alternated to 70% RH, the lubrication effect diminished due to the production of molybdenum oxide (MoO3), and the COF was about 0.2, which was attributed to the degradation of MoS2on the wear track and the release of fresh MoS2from the porous TiN matrix. After the environmental conditions shifted from 70% to 20% RH, the MoO3was removed, and the lubrication effect was restored. In summary, TiN–MoS2porous composite coating offers a promising approach for lubrication in humidity-fluctuating environments.
研究领域:
材料科学
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表面工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 11
·期 1
·78-86
·
IF 3.119
Jingxuan Zheng,Bo Zhang,Zhao Wang
g-C3N4/MoS2 composites were successfully prepared by an electron-assisted strategy in one step. Dielectric barrier discharge (DBD) plasma as an electron source, which has low bulk temperature and high electron energy, can etch and modify the surface of g-C3N4/MoS2. The abundant N and S vacancies were introduced in the composites by plasma. The dual defects promoted the recombination and formation of heterojunctions of the g-C3N4/MoS2 composite. It exhibited stronger light harvesting ability and higher charge separation efficiency than that of pure g-C3N4 and MoS2. Compared with the sample by traditional calcination method, the plasma-sample showed better performance for degrading rhodamine B (RhB) and methyl orange. RhB is completely degraded within 2 hours on g-C3N4/MoS2 by plasma. A mechanism for the photocatalytic degradation of organic pollutants via the composites was proposed. An electron-assisted strategy provides a green and effective platform to achieve catalysts with improved performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 3
·035507
·
IF 1.929
Weimin Guo,Qinglin Zhu,Qinghua Lu
Li–S battery has high theoretical specific capacity and specific energy, but the shuttle effect challenges its commercial application. So many composite materials had been prepared to conquer it. In this research, MCNT/MoS2/S composite and MCNT/MoS2/S composite cathode were prepared respectively by a facile hydrothermal method and by melt diffusion method. MoS2 and MCNT showed uniformly combined together by SEM and TEM. The electrochemical properties of the MCNT/MoS2/S cathode were carried out on a Gamry electrochemical workstation. The initial capacity arrive 820 mAh·g−1 at 0.1 C, and specific capacities up to ∼460 mAh·g−1 over more than 300 cycles at 0.5 C. The improvement of electrochemical performance due to MoS2 strongly adsorbing polysulfide and the conductivity network of MCNT.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 34
·e202300119
·
IF 2.1
Yu Liu,Taojun Wang
Graphical The natural wood and MoS 2 are combined to construct composites, which can be used for highly efficient removing organic pollutants from water under light irradiation in virtue of synergistic effect of adsorption and photocatalysis mechanism. Organic dye-contained wastewater is a major threat to the global environment and public health. In this study, natural wood and MoS 2 are combined to create effective photocatalysts for removing organic pollutants from water under light irradiation. The results show that the photocatalytic degradation activity of wood/MoS 2 composites are obviously superior to that of natural wood under solar light as well as possess outstanding stability after three reaction cycles. The improvement in photocatalytic performance for photodegradation is primarily due to an increase in specific surface area and the introduction of catalytic active sites from the edge S, which favors adsorption of organic pollutants and accelerates the degradation process. The synergistic effect of adsorption and photocatalysis also ensures that the composited catalyst is highly universal in its application to organic dye degradation, including RhB (Rhodamine B), MB (Methylene Blue), and MO (Methyl Orange); the kinetic constant for the photocatalytic degradation of RhB, MO, and MB are 0.040, 0.035, and 0.032 min −1 , respectively and the degradation performance can be well maintained after three cycle tests. Our study has proved that the wood/MoS 2 composite is a novel, low-cost photocatalyst that plays an important role in environmental protection.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 16
·12297-12305
·
IF 2.019
Hou Baoting,Wang Xinlu,Yao Jing,Zhang Hongbo,Yu Wensheng,Liu Guixia,Dong Xiangting,Wang Limin,Wang Jinxian
A simple and novel method based on recrystallization-sulfurization method has been developed to fabricate Ce 2 S 3 /MoS 2 composite and their structure, morphology and electrochemical performance is researched systematically. The Ce 2 S 3 /MoS 2 composite exhibit enhanced electrochemical performance compared with Ce 2 S 3 and MoS 2 . Among them, Ce 2 S 3 /MoS 2 composite has an initial reversible discharge capacity of 187.5 mAh g −1 , coulombic efficiency of 78.6% and a reversible capacity as high as 636.5 mAh g −1 , coulombic efficiency of 99.7% after 500 cycles at a current density of 100 mA g −1 and the highest discharge capacity of 97.3 mAh g −1 at a high current density of 1000 mA g −1 , showing the best reversible capacity and cycling performance. The results show that the compositing between MoS 2 and Ce 2 S 3 can maintain the stability of the structure during the charge/discharge process and existence of Ce 2 S 3 can enhance the electrical conductivity of Ce 2 S 3 /MoS 2 composite and further improves the reversible capacities, cycling performance and rate performance of Ce 2 S 3 /MoS 2 composite.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zihao Hu,Beiyang Guo,Huiqi Wu,Fang Zhu,Sridhar Komarneni,Jianfeng Ma
In this paper, MIL-101(Fe) and MoS 2 composites (MIL-101(Fe)/MoS 2 ) were synthesized using a facile solvothermal method . As a new degradation system, the synthesized composites were investigated using persulfate (PS) activation based on visible light (Vis). To establish the superiority of a heterogeneous photochemical catalysis system, the MIL-101(Fe)/MoS 2 was used as the catalyst in the presence of Na 2 S 2 O 8 with visible light irradiation. In the system mentioned, the MIL-101(Fe)/MoS 2 catalyst presented a much better catalytic ability than that of either a single photocatalysis or chemocatalysis system. The better catalytic ability suggests that the MIL-101(Fe)/MoS 2 catalyst was capable of effectively integrating photocatalysis and chemocatalysis leading to the highest degradation efficiency of 85% in 40 min with tetracycline as the target pollutant. The catalytic system MIL-101(Fe)/MoS 2 /PS/Vis degraded TC pollutant by forming species of O 2 ‾, 1 O 2 , hydroxyl radicals (•OH) and sulfate radicals (•SO 4 ‾) to degrade TC. Furthermore, the MIL-101(Fe)/MoS 2 catalyst displayed better catalytic performance compared to those materials that were previously reported, as verified by the good stability (reached 80% after three cycles) and the high TC degradation rate (85%) of the currently developed material. This system may be applicable to the degradation of TC and other challenging organic pollutants .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2022
·Vol. 25
·期 9
·2201526
·
IF 4.122
Xiaoyu Tian,Yueyue Wang,Jingjing Wang,Zhonglu Guo,Long Hu,Chengchun Tang,Guifeng Chen,Yi Fang
As a typical 2D transition metal dichalcogenide (TMD), molybdenum disulfide (MoS 2 ) has received widespread attention in the field of microwave absorption (MA). However, pure MoS 2 still has disadvantages in achieving the target of excellent MA performance due to its weak ability in electromagnetic wave (EMW) energy attenuation, in addition to the complicated preparation process of MoS 2 -based composites. It is highly significant to develop functionalized MoS 2 with a low-cost, high-efficiency, and facile preparation process. Herein, a novel core–shell MnS@MoS 2 composite with spherical flower-like structure is developed by a one-pot hydrothermal method. The morphological and performance characterization demonstrates the existence of numerous heterogeneous interfaces, which dramatically enhance the dielectric loss capability of the composites. By adjusting the ratio of Mo 4+ and Mn 2+ , the minimum reflection loss (RL min ) of MnS@MoS 2 -40 composite reaches −65.19 dB and the effective absorption bandwidth (EAB) reaches 6.72 GHz. At the same time, MnS@MoS 2 -60 composite can achieve the RL min value of −53.58 dB and an EAB of up to 6.16 GHz (from 11.44 to 17.6 GHz) at a thickness of only 1.78 mm. These outstanding performances are based on microwave absorbers formed by transition metal sulfide heterojunctions, pioneering the first combination of α-MnS and MoS 2 for MA applications.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 35
·16531-16538
·
IF 3.3
Yulong Zheng,Hui Zhang,Pei Han,Zhaoshun Zhang,Xueqin Zuo,Qun Yang,Huaibao Tang,Shaowei Jin,Guang Li
Solar distillation can directly produce clean water from non-potable water resources using solar energy and has great promise in desalination systems. However, the improvement of evaporation efficiency through the selection and optimization of suitable candidate materials is still a challenging problem. In this paper, by implementing a customized insulating floating layer and establishing an interfacial evaporation system, we have achieved a successful experiment demonstrating the potential to improve the efficacy of solar steam generation. This system is created by growing 1T-2H mixed-phase molybdenum disulfide composites on the carbonized ZIF8 surface. In this study, the treated composites were well integrated with the thermal insulating floating layer to achieve a stable interfacial structure for photothermal conversion. Furthermore, the cotton threads, known for their great absorbency, created an unhindered pathway for water flow, making it easier for steam to be generated and circulated. Using the above system, under one solar illumination condition, a significant evaporation rate of 1.57 kg m−2 h−1 was attained. The solar steam conversion efficiency of this interfacial heating system under one solar illumination condition was 94.4%. In addition to demonstrating that interface engineering is effective for solar steam production, this work offers a simple and economical water purification method.
研究领域:
材料科学
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能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 9
·e5060
·
IF 3.259
Yinghui Hu,Yulin Yang,Ruiqing Fan,Kaifeng Lin,Dongyu Hao,Debin Xia,Ping Wang
In this report, CuO/MoS 2 composites were successfully prepared by the hydrothermal method where nano-sized CuO was uniformly distributed on the surface of hierarchical MoS 2 substrates (CuO/MoS 2 composites). Their physicochemical properties and catalytic performance in ammonium perchlorate (AP) decomposition were investigated and characterized by XRD, SEM, TEM, BET, XPS, TG/DSC and combustion measurement. The results showed that it could decrease AP decomposition temperature at high decomposition stage from 416.5 °C to 323.5 °C and increase the heat release from 378 J/g (pure AP) to 1340 J/g (AP with catalysts), which was better than pure CuO nanoparticles (345.5 °C and 1046 J/g). Meanwhile, it showed excellent performance in combustion reaction either in N 2 or air atmosphere. The results obtained by photocurrent spectra, photoluminescence spectra and time-resolved fluorescence emission spectra indicated that loading CuO mediated the generation rate and combination rate of electrons and holes, thus tuning the catalytic performance on AP decomposition. This study proved that employing the supports that can synergistically interact with CuO is an efficient strategy to enhance the catalytic performance of CuO.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Minghui Yu,Qi Hu,Xiaoyu Gong,Hao Yu,Shuang Wang,Zhiqiang Li,Yanyan Chen,Shenjie Li
In this study, CdIn 2 S 4 /MoS 2 composite structure was prepared by a simple two-step hydrothermal synthesis method, and the CdIn 2 S 4 /MoS 2 composite structure samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (UV–vis). Due to the effective loading of MoS 2 on the surface of CdIn 2 S 4 particles, the photocatalytic performance of CdIn 2 S 4 /MoS 2 composite material is significantly improved under visible light irradiation (λ = 420 nm), which indicating the effective inhibit the recombination of photogenerated electron holes . Meanwhile, the visible light response of CdIn 2 S 4 is increased and the life of photoexcitation carrier is prolonged. The CdIn 2 S 4 /MoS 2 (sample 2CM) composite sample with mole content of 9% has the highest catalytic hydrogen production activity, and its hydrogen production rate is 293 μmol h −1 g −1 , which is more than 3 times that of sample C. After 4 cycles of photocatalytic experiments, the photocatalytic activity is still stable, and the XRD diffraction peak does not appear obvious shift, which provides a new way for the design and preparation of efficient and stable photocatalytic materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Shuangyue Hou,Yue Lian,Zongying Xu,Dawei Wang,Chaolei Ban,Jing Zhao,Huaihao Zhang
the ball-flower like composite (NiS 2 @MoS 2 ) was successfully synthesized by a convenient two-step hydrothermal method using Ni(NO 3 ) 2 ·6H 2 O and (NH 4 ) 6 Mo 7 O 24 ·4H 2 O as precursors. MoS 2 nano-sheets, uniformly generated on NiS 2 surface, increases the surface roughness and porosity, and accelerates the electrons and ions transfer of the composite. The synergistic effect of Mo and Ni improves the conductivity of the materials. Furthermore, by controlling the atomic ratio of Mo to Ni in precursors, the composite MN-1 (the molar ratio of MoS 2 to NiS 2 is 1:1) with the best capacity performance was obtained. The morphology and composition were characterized by a variety of means, such as TEM, SEM, XPS, XRD, BET and EDX. The electrochemical measurement results exhibited high specific capacity (848.2 C g −1 at specific current of 1 A g −1 ) and good cycling stability (83.1% specific capacity retention after 10000 GCD cycles) of MN-1 in 6 M KOH. Furthermore, an asymmetric supercapacitor was assembled with MN-1 as positive electrode and activated carbon as negative electrode. When the power density is 0.8 kW kg −1 , its energy density reaches up to 37.2 Wh kg −1 . The present work may offer new design strategy for electrode materials .
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）