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Li N, Guo S, Pan B, Xie M, Yan J, Chen Z. The Effect of 1T Phase Molybdenum Disulfide on the Tribological Performance of Polyethylene Glycol. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2124748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Ning Li
- Key Laboratory of Polymer Science and Nano Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Shihao Guo
- Key Laboratory of Polymer Science and Nano Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Bingli Pan
- Henan Key Laboratory of Tribology, Henan University of Science and Technology, Luoyang, PR China
| | - Mengxin Xie
- Key Laboratory of Polymer Science and Nano Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Junjiang Yan
- Key Laboratory of Polymer Science and Nano Technology, Henan University of Science and Technology, Luoyang, PR China
| | - Zhe Chen
- Key Laboratory of Polymer Science and Nano Technology, Henan University of Science and Technology, Luoyang, PR China
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Xie M, Pan B, Li N, Zhao S, Yan J, Guo S, Chen Z, Wang H. 2D graphene/FeOCl heterojunctions with enhanced tribology performance as a lubricant additive for liquid paraffin. RSC Adv 2022; 12:2759-2769. [PMID: 35425281 PMCID: PMC8979217 DOI: 10.1039/d1ra06650a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 11/22/2021] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study is to prepare graphene/FeOCl (G/FeOCl) heterojunctions via a microwave-pyrolysis approach and probe into the synergistic lubrication of G with FeOCl in liquid paraffin (LP). The morphology and chemical composition of specimens were analysed by utilizing scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) techniques. The tribological property of G/FeOCl was determined, and the interaction between the G/FeOCl heterojunction and friction pair was carried out through simulation calculations. The results indicated that neither G nor FeOCl significantly improved the lubrication performance of LP. However, together with FeOCl, G as lubrication additives greatly improved the lubrication performance of LP. Under the load of 1.648 GPa, the mean friction coefficient and wear scar diameter of LP containing 0.20 wt% G/FeOCl were 66.1% and 44.7% inferior to those of pure LP, respectively. Scanning electron microscopy (SEM) and elemental mapping analyses of worn scars revealed the formation of G/FeOCl layer tribofilms that prevent direct contact between metals. In addition, the high interfacial energy between graphene and FeOCl calculated based on first-principles density functional theory (DFT) further confirmed that graphene and FeOCl simultaneously form friction films with wear resistance and wear reduction effect at the friction interface, which is consistent with the experimental results. This study, therefore, provides a pathway for low-friction lubricants by deploying G/FeOCl two-dimensional material systems. Graphene/FeOCl (G/FeOCl) heterojunctions were prepared by microwave-pyrolysis, thoroughly characterised and used to probe the synergistic lubrication of G with FeOCl in liquid paraffin. We provide a pathway for low-friction lubricants by deploying G/FeOCl 2D materials.![]()
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Affiliation(s)
- Mengxin Xie
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Bingli Pan
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China .,National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology 471000 Luoyang PR China
| | - Ning Li
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Shuang Zhao
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Junjiang Yan
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Shihao Guo
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Zhe Chen
- Institute of Henan Polymer Composites, School of Chemical Engineering, Henan University of Science and Technology 471000 Luoyang PR China
| | - Honggang Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 PR China
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Osthues H, Schwermann C, Preuß JA, Deilmann T, Bratschitsch R, Rohlfing M, Doltsinis NL. Covalent photofunctionalization and electronic repair of 2H-MoS 2via nitrogen incorporation. Phys Chem Chem Phys 2021; 23:18517-18524. [PMID: 34612390 DOI: 10.1039/d1cp02313f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A route towards covalent functionalization of chemically inert 2H-MoS2 exploiting sulfur vacancies is explored by means of (TD)DFT and GW/BSE calculations. Functionalization via nitrogen incorporation at sulfur vacancies is shown to result in more stable covalent binding than via thiol incorporation. In this way, defective monolayer MoS2 is repaired and the quasiparticle band structure as well as the remarkable optical properties of pristine MoS2 are restored. Hence, defect-free functionalization with various molecules is possible. Our results for covalently attached azobenzene, as a prominent photo-switch, pave the way to create photoresponsive two-dimensional (2D) materials.
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Affiliation(s)
- Helena Osthues
- Institute for Solid State Theory and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany.
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Saidi MZ, El Moujahid C, Pasc A, Canilho N, Delgado-Sanchez C, Celzard A, Fierro V, Kouitat-Njiwa R, Chafik T. Enhanced tribological properties of wind turbine engine oil formulated with flower-shaped MoS2 nano-additives. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126509] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zhao S, Yang H, Liu Y, Xing Y, Cui G, Liu Q. Cu-Doped Co 3O 4 microstructure as an efficient non-noble metal electrocatalyst for methanol oxidation in a basic solution. NEW J CHEM 2021. [DOI: 10.1039/d1nj01953h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Co3O4 doped with copper at different concentrations was used to catalyze methanol oxidation reactions.
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Affiliation(s)
- Shuang Zhao
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Hui Yang
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Yaru Liu
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Yaodong Xing
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Guangwen Cui
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Qingyun Liu
- College of Chemical and Biological Engineering
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- Shandong University of Science and Technology
- Qingdao 266590
- China
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Yan Z, Sui X, Yan M, Liu J, Zhang S, Hao J, Li W, Liu W. Dependence of Friction and Wear on the Microstructures of WS 2 Films under a Simulated Space Environment. ACS APPLIED MATERIALS & INTERFACES 2020; 12:56632-56641. [PMID: 33270435 DOI: 10.1021/acsami.0c18996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Atomic oxygen (AO) has an important influence on the performance of solid lubricating materials applied in space. The tribological behaviors of both sputtered WS2 films without and with a dense layer were mainly investigated under the ex situ AO irradiation condition. AO irradiation results in the worse tribological property for the WS2 film without a dense layer. On the contrary, it is surprising that the WS2 film with the dense layer exhibits a lower friction coefficient after irradiation, which is different from the reported results that the solid lubricating films always increased the friction and wear because the surfaces of the films were oxidized by AO. Meanwhile, it is found that the generated W oxides contributes to the partial surface of the wear track becoming smooth because of the shear and slip of crystal planes for WS2 crystals on the surface of the dense layer. Eventually, the lubricating mechanisms of the irradiated WS2 films are also revealed via correlating the friction and wear characteristics of the films.
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Affiliation(s)
- Zhen Yan
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xudong Sui
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Qingdao Center of Resource Chemistry and New Materials, Qingdao 266000, China
| | - Mingming Yan
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Liu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuaituo Zhang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junying Hao
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wensheng Li
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
| | - Weimin Liu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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Chouhan A, Mungse HP, Khatri OP. Surface chemistry of graphene and graphene oxide: A versatile route for their dispersion and tribological applications. Adv Colloid Interface Sci 2020; 283:102215. [PMID: 32771691 DOI: 10.1016/j.cis.2020.102215] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/15/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022]
Abstract
Graphene, the most promising material of the decade, has attracted immense interest in a diversified range of applications. The weak van der Waals interaction between adjacent atomic-thick lamellae, excellent mechanical strength, remarkable thermal conductivity, and high surface area, make graphene a potential candidate for tribological applications. However, the use of graphene as an additive to liquid lubricants has been a major challenge because of poor dispersibility. Herein, a thorough review is presented on preparation, structural models, chemical functionalization, and dispersibility of graphene, graphene oxide, chemically-functionalized graphene, and graphene-derived nanocomposites. The graphene-based materials as additives to water and lubricating oils improved the lubrication properties by reducing the friction, protecting the contact interfaces against the wear, dissipating the heat from tribo-interfaces, and mitigating the corrosion by forming the protecting thin film. The dispersion stability, structural features, and dosage of graphene-based dispersoids, along with contact geometry, play important roles and govern the tribological properties. The chemistry of lubricated surfaces is critically reviewed by emphasizing the graphene-based thin film formation under the tribo-stress, which minimizes the wear. The comprehensive review provides variable approaches for the development of high-performance lubricant systems and accentuates the lubrication mechanisms by highlighting the role of graphene-based materials for enhancement of tribological properties.
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