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
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Tianran Lin,Jing Wang,Liangqia Guo,Fengfu Fu
Molybdenum disulfide (MoS2) has received tremendous attention due to the earth-abundant composition and high catalytic activity. However, the catalytic activity of MoS2 except electro- and photocatalytic has seldom been explored. Herein, Fe3O4@MoS2 core–shell composites were prepared for the first time by in situ growth of MoS2 nanosheets on the surfaces of Fe3O4 nanoparticles under different temperature, and the catalytic performance of the resulting composites was evaluated by using the catalytic reduction of 4-nitrophenol to 4-aminophenol. FE-SEM, TEM, XRD, and XPS analyses verified the core–shell structure with MoS2 nanosheets of defect-rich and oxygen incorporation on the surfaces of Fe3O4 nanoparticles. Fe3O4@MoS2 composites were found to exhibit a high catalytic activity for the reduction of 4-nitrophenol with the highest activity factor k = 3773 min–1 g–1. A plausible catalytic mechanism for the reduction of 4-nitrophenol was also proposed. This study presents an inexpensive, reusable, fast, and highly efficient catalyst for the reduction of 4-nitrophenol without noble metals.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Xixi Jiang,Xinyao Shi,Min Zhang,Yarong Wang,Zhenghao Gu,Lin Chen,Hao Zhu,Kai Zhang,Qingqing Sun,David Wei Zhang
The fast-developing information technology has imposed urgent need for effective solutions to overcome the increasing power density in further scaled electronic devices and systems. The tunnel field-effect transistor (TFET) built with two-dimensional (2D) semiconductors has been widely studied due to its steep-slope switching capability with ultrathin channel. In this work, a symmetric TFET has been fabricated using the MoS2/black phosphorus/MoS2 heterostructure as the channel material. The TFET device exhibits bidirectional current flow which is distinguished from the conventional asymmetric TFET geometry. Upon the application of top gate structure, the devices show sharp turn-on behavior which originated from the transport properties based on the band-to-band tunneling (BTBT) mechanism. By engineering of the top gate materials, a subthermionic subthreshold slope (SS) below 60 mV/dec at room temperature has been achieved, offering a new pathway to lower the power supply and power density in future integrated circuits based on novel 2D materials.
研究领域:
材料科学
·
电子工程
·
半导体物理
✓ 已验证
DOI
Coatings
·
2022
·Vol. 12
·期 9
·1263
·
IF 3.236
Honggang Xia,Dongbin Wang,Aixian Tian,Yingde Xu,Hao Gong,Zhaoyang Li,Jun Miao
Medical tools and implants used in clinics can be contaminated with bacteria even with disinfection treatment. To avert this situation, titanium (Ti) plates modified with a MoS2(S)–Ag3PO4coating were designed to killStaphylococcus aureus(S. aureus) andEscherichia coli(E. coli) effectively under near-infrared (NIR) light irradiation. The introduction of Ag3PO4nanoparticles (NPs) reduced the bandgap of MoS2and suppressed the recombination of the photogenerated electron–hole pairs. Therefore, Ti–MoS2(S)–Ag3PO4exhibited a higher photocatalytic performance, leading to the generation of more radical oxygen species (ROS). Furthermore, cooperating with the good photothermal performance of MoS2, the MoS2(S)–Ag3PO4coating exhibited a high antibacterial efficacy of 99.76 ± 0.15% and 99.85 ± 0.09% againstS. aureusandE. coli, respectively, for 15 min in vitro. Moreover, the MoS2(S)–Ag3PO4coating had no apparent toxicity to cells. The proposed strategy may provide new insights for rapidly eradicating bacteria on medical tools and superficial implants.Keywords:bacteria-killing;Ag3PO4;MoS2;photocatalytic;photothermal
研究领域:
材料科学
·
微生物学
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2019
·
IF 5.04
Meng-Jie Chang,Wen-Na Cui,Jun Liu,Kang Wang,Hui-Ling Du,Lei Qiu,Si-Meng Fan,Zhen-Min Luo
TiO 2 /Bi 4 Ti 3 O 12 hybrids have been widely prepared as promising photocatalysts for decomposing organic contaminations. However, the insufficient visible light absorption and low charge separation efficiency lead to their poor photocatalytic activity. Herein, a robust methodology to construct novel TiO 2 /Bi 4 Ti 3 O 12 /MoS 2 core/shell structures as visible light photocatalysts is presented. Homogeneous bismuth oxyiodide (BiOI) nanoplates were immobilized on electrospun TiO 2 nanofiber surface by successive ionic layer adsorption and reaction (SILAR) method. TiO 2 /Bi 4 Ti 3 O 12 core/shell nanofibers were conveniently prepared by partial conversion of TiO 2 to high crystallized Bi 4 Ti 3 O 12 shells through a solid-state reaction with BiOI nanoplates, which is accompanied with certain transition of TiO 2 from anatase to rutile phase. Afterwards, MoS 2 nanosheets with several layers thick were uniform decorated on the TiO 2 /Bi 4 Ti 3 O 12 fiber surface resulting in TiO 2 /Bi 4 Ti 3 O 12 /MoS 2 structures. Significant enhancement of visible light absorption and photo-generated charge separation of TiO 2 /Bi 4 Ti 3 O 12 were achieved by introduction of MoS 2 . As a result, the optimized TiO 2 /Bi 4 Ti 3 O 12 /MoS 2 -2 presents 60% improvement for photodegrading RhB after 120 min irradiation under visible light and 3 times higher of apparent reaction rate constant in compared with the TiO 2 /Bi 4 Ti 3 O 12 . This synthetic method can also be used to establish other photocatalysts simply at low cost, therefore, is suitable for practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 8
·2715-2721
·
IF 4.052
Lin Lin,Siyu Huang,Yuxin Zhu,Biao Du,Zhihua Zhang,Chao Chen,Xuewen Wang,Ning Zhang
A new synthetic method was used to develop a CdS/MoS2 heterojunction. Cd-MOF was coated onto the surface of MoS2 flowers to construct a core–shell MoS2@Cd-MOF. Thioacetamide was used as a sulfur source to sulfurize the MoS2@Cd-MOF to form a CdS/MoS2 heterojunction. Since the Cd2+ ions were highly ordered and separated by the organic ligands of the Cd-MOF shell, the as-synthesized CdS/MoS2 heterojunction possessed a large surface area and intimate contact at the heterogeneous interface with a uniform loading of CdS nanoparticles on the MoS2 flowers. Consequently, the CdS/MoS2 heterojunction exhibited a significantly enhanced photocatalytic H2 evolution rate of average 5587 μmol h−1 g−1 under UV-visible light irradiation.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-13
·
IF 14.919
Ji Xixi,Lin Yanhong,Zeng Jie,Ren Zhonghua,Lin Zijia,Mu Yongbiao,Qiu Yejun,Yu Jie
Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS 2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH) x ) are successively grown on carbon fibers (CF/VGSs/MoS 2 /FeCoNi(OH) x ). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm −2 and small Tafel slope of 29.2 mV dec −1 . Theoretical calculation indicates that compositing of FeCoNi(OH) x with MoS 2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS 2 /FeCoNi(OH) x anode for overall water splitting, which generates a current density of 100 mA cm −2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Chao Li,Banggui Lao,Zhike Li,Huibin Yin,Zhenyu Yang,Hongyu Wang,Deliang Chen,Xiaoli Zhang,Yongjun Xu,Chenghua Sun
Dual-ion batteries (DIBs) offer unique merits for energy storage, such as high energy density and excellent safety, but are usually limited by sluggish kinetics for anions intercalation into graphite cathodes under high voltage range (≥5.4 V). Here, we reported MoS 2 as a novel cathode to store anion owing to larger layered spacing (~ 6.15 Å) than graphite (~ 3.35 Å). Such structure can effectively improve anion intercalation kinetics and achieve excellent stability in a wide voltage window (below 5 V). Complete batteries have been further fabricated, achieving stable cycling performance with promising working voltage and energy density, which exceeds most reported DIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xiaobing Xu,Wei Zhong,Lei Zhang,Guangxiang Liu,Wei Xu,Youwei Du
Molybdenum Sulfide (MoS 2 ) represents an excellent performance non precious electrocatalyst for hydrogen evolution reaction (HER). There are some challenges to further improve the HER property of MoS 2 owing to its inferior conductivity, serious aggregation and limited active sites. In this study, Ni 0.15 Co 0.85 S 2 @MoS 2 hybrids are successfully synthesized in a simple hydrothermal method, where Ni-Co Metal Organic Frameworks (NiCo-MOFs) are served as precursors, which hydrothermally react with ammonium molybdate tetrahydrate (H 24 Mo 7 N 6 O 24 ·4H 2 O) and thiourea (CH 4 N 2 S) to obtain a catalyst for HER. As expected, the optimized Ni 0.15 Co 0.85 S 2 @MoS 2 catalyst presents ultrahigh HER property, a low overpotential of 79 mV at 10 mA cm −2 and a Tafel slope of 52 mV dec −1 can be observed in 1.0 M KOH, accompanied by excellent stability. This result displayed in our study could give a new strategy for designing and synthesizing more economical electrocatalysts based on MOFs as precursors in the future.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 21
·期 1
·2407337
·
IF 13
Linlong Xing,Haoran Cheng,Yang Li,Qiang Chen,Chuntai Liu,Changyu Shen,Xianhu Liu
The design and development of high-quality electromagnetic waves (EMW) absorbing materials play a vital role in combating the escalating negative effects of microwave radiation and interference. Herein, MoS 2 @Co/NC@CF fibrous membranes are successfully fabricated by electrospinning technology and carbonization, and a molybdenum disulfide (MoS 2 ) layer is synthesized on the surface of these fibers via hydrothermal method. The seed-assisted growth method not only effectively avoids the accumulation and improves the loading of ZIF-67 particles, so as to ensure that the magnetic components in the fibers are evenly distributed in a wider range, rather than only intermittently present in some sites. Meanwhile, the introduction of semiconductor MoS 2 as the shell further optimizes the impedance matching and improves the EMW absorption performance of the carbon fibrous membranes: the minimum reflection loss (RL min ) is −67.56 dB, and the maximum effective absorption bandwidth (EAB max ) is further expanded to 6.56 GHz (2.1 mm, 11.44–18 GHz). This work provides a feasible method for developing high-efficient EMW-absorbing materials.
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
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 11
·9006-9015
·
IF 3.201
Huating Sun,Tianxing Wu,Yunxia Zhang,Dickon H. L. Ng,Guozhong Wang
Molybdenum disulfide (MoS2) was successfully synthesized via a facile one-step hydrothermal method without addition of templates or surfactants. The obtained MoS2 product was characterized via various techniques including FESEM, HRTEM, XRD, BET and XPS analyses. Their application in capturing Cr(VI) ions in water was investigated. The results showed that the MoS2 nanosheets were ultrathin with a thickness of 5–10 nm and had a uniform lateral size of 100–200 nm. Impressively, these MoS2 nanosheets not only possessed enlarged interlayer spacing, but also had multiple defects on the basal planes, which were proved to be crucial in the removal of Cr(VI). The kinetics of chromium adsorption was found to follow the pseudo-second-order rate equation and the adsorption isotherm data were well fitted to the Langmuir model with a chromium in-take capacity of about 84.03 mg g−1. This structure-enhanced removal was likely related to the synergism of adsorption and reduction, in which the anionic Cr(VI) was adsorbed on the surface of D-MoS2via electrostatic interaction. At the same time, some fraction of the adsorbed Cr(VI) was reduced to low toxic Cr(III) and the generated Cr(III) species were adsorbed by the adsorbent. More significantly, the adsorption and reduction processes not only transferred the Cr(VI) from the aqueous environment to the surface of solid adsorbents but also alleviated the toxicity of Cr(VI). It was evident that this study may promote the application of other transition metal dichalcogenides in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Electronics
·
2022
·Vol. 11
·期 16
·2574
·
IF 2.69
Yiren Wang,Weitao Su,Fei Chen,Hong-Wei Lu
Owing to the strong optical absorption of Sb2Se3, building heterojunctions (HJs) by using thin-layer Sb2Se3 and other two-dimensional (2D) materials is critical to the design and applications of ultrathin optoelectronic devices. However, the preparation of HJs using Sb2Se3 and other transition metal dichalcogenide (TMDC) thin layers is still challenging. Herein, a chemical vapor deposition (CVD) method was used to prepare monolayer MoS2(1L-MoS2) and Sb2Se3 thin layers. A dry transfer method was subsequently used to build their HJs. Individual PL spectra and PL mapping results obtained at the HJs indicate a charge injection from 1L-MoS2 into Sb2Se3 flake, which was further confirmed by contact potential difference (CPD) results obtained by using Kelvin probe force microscopy (KPFM). Further measurements indicate a type-Ⅰ band alignment with a band offset finally determined to be 157 meV. The obtained results of Sb2Se3/1L-MoS2 HJs will benefit the rational design of novel ultrathin optoelectronic devices based on novel 2D absorber layers working in visible light.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）