CARBON
·
2023
·
IF 10.9
Yushi Yang,Xiaoqiang Fan,Zhaofan Yue,Minhao Zhu
Heterogeneous materials are an ideal platform for low friction, but most of the heterogeneous materials used in tribology field are artificially synthesized. Here, by matching the molybdenum disulfide (MoS 2 ) hybrid polyethylene glycol (PEG 200) and diamond-like carbon (DLC) film, the spontaneous formation of heterogeneous transfer film was realized during sliding. Thus, the anti-friction/wear ability of the synergetic system is improved from the reduction of friction coefficient and wear rate by 33.3% and 32.1% contrast to DLC film, severally. The characterization results show that the heterogeneous transfer film is formed by the rehybridization and recrystallization of MoS 2 and DLC combined with amorphous phase. The improvement on shearing capacity and bearing capacity of as-designed lubrication strategy better explicates the solid-liquid synergistic effect. The formation theory of heterojunction in solid-liquid composite lubrication is put forward, which has important reference value for the future solid-liquid composite lubrication technology.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Weiwei Zhang,Liangjun Yang,Hanghang Li,Ping Song,Wanzhen Li,Lin Gui,Kai Yang,Longbao Zhu,Yugui Tao,Fei Ge
2D Molybdenum disulfide (MoS 2 ) nanoplatform were prepared by the liquid ultrasonic stripping method using chitosan (CS) and eugenol (Eg), and a drug loading system based on MoS 2 photothermal effect was constructed (EMC) and applied in antifungal assays. The system not only had good physiological stability but also had an excellent photothermal effect and could effectively inhibit the growth of fungi. The characterization results showed that the average thickness of MoS 2 nanoplatform was 10 nm. In vivo and in vitro experiments showed that the synthesized EMC had excellent photothermal properties, displayed efficient antifungal activity against spoilage fungi such as Saccharomyces uvarum and Penicillium , thus prolonging the shelf life of the fruit. The analysis of chemical quality indexes showed that the good film-forming ability of EMC. This study reported a good photothermal effect of MoS 2 to inhibit fungal growth to protect postharvest fruits.
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APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Maru Dessie Walle,Ke Zeng,Mengyuan Zhang,Yajuan Li,You-Nian Liu
Lithium–sulfur (Li–S) batteries have attracted an increasing attention for advanced energy storage devices, because of their high energy density, low cost and lower environmental impacts. However, their commercial applications are still hampered with the low conductivity and sulfur utilization, the low sulfur loading and the serious capacity fading at a high current rate. Herein, we prepared flower-like molybdenum disulfide and carbon nanotubes (MoS 2 /CNTs) composites with mesoporous structures for high sulfur utilization cathodes. The flower-like MoS 2 can immobilize sulfur and obstruct the solubility of polysulfide within the structures. The MoS 2 /CNTs-S cathode with 2.6 mg cm −2 sulfur loading and capacity per area of 3.83 mA h cm −2 delivers an initial specific discharge capacity of 1473 mA h g −1 with 88.0% sulfur utilization and maintains a reversible capacity of 855.5 mA h g −1 with coulombic efficiency up to 96.6% after 50 cycles at the current rate of 0.2 C (335.0 mA g −1 ). Impressively, the MoS 2 /CNTs-S cathode at 5 C shows the high specific capacity of 1254 mA h g −1 with 76.0% sulfur utilization and maintains 384.0 mA h g −1 with an average coulombic efficiency of 91% after 200 cycles. The MoS 2 /CNTs-S cathode could be a good candidate for high-performance Li–S battery.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
·
IF 6.361
Jian Liu,Junxia Zheng,Huifang Nie,Doudou Zhang,Dairong Cao,Zhen Xing,Bifei Li,Lee Jia
The construction of multifunctional theranostic nanoplatforms to integrate accurate imaging and enhanced therapy to treat tumors is highly attractive but remains a challenge. Here, we developed a molybdenum disulfide (MoS 2 )-based hyaluronic acid (HA)-functionalized nanoplatform capable of achieving the targeted co-delivery of the gadolinium (Gd)-based contrast agents (CAs) and the anticancer drug gefitinib (Gef) for magnetic resonance imaging (MRI) and synergetic chemo-photothermal therapy of tumors. Gd 3+ ions were coupled to HA-grafted MoS 2 nanosheets with diethylenetriaminepentaacetic acid (DTPA) as a linker, followed by the incorporation of Gef. The resulting MoS 2 -HA-DTPA-Gd/Gef exhibited enhanced relaxivity, 3.3 times greater than that of the commercial CA DTPA-Gd, which facilitated the MRI in vivo. Moreover, the nanoplatform effectively converted the absorbed near-infrared (NIR) light into heat, which not only induced the photothermal ablation of cancer cells but also triggered the release of Gef from MoS 2 -HA-DTPA-Gd/Gef, enabling the synergetic chemo-photothermal therapy. The results of in vitro and in vivo experiments revealed that MoS 2 -HA-DTPA-Gd/Gef upon NIR irradiation effectively blocked the phosphatidylinositol 3 kinase (PI3K)/protein kinase B (Akt) signaling pathway and activated apoptosis-related proteins to induce cell apoptosis and suppress cell proliferation , thus inhibiting the tumor growth in lung cancer cell-bearing mice. Taken together, this multifunctional theranostic nanoplatform has significant promise for the diagnosis and treatment of cancer.
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PubMed
高影响因子
ELECTROANALYSIS
·
2019
·Vol. 31
·期 7
·1390-1400
·
IF 2.691
Ying Wang,Xamxikamar Mamat,Yongtao Li,Xun Hu,Ping Wang,Yemin Dong,Guangzhi Hu
In this study, a molybdenum disulfide/multiwalled carbon nanotubes (MoS 2 @MWCNTs) nanocomposite was synthesized by employing a simple hydrothermal method. The flower-like structure of the MoS 2 @MWCNTs was characterized via scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the load of crystalline MoS 2 was verified via X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS). The as-prepared MoS 2 @MWCNTs nanocomposite was used to modify glassy carbon electrode (GCE) as an electrochemical sensor for detecting aristolochic acids (AAs). With the optimized parameters, the proposed electrochemical sensor exhibited good sensitivity and a broad linear concentration range for detecting AAs from 0.2 to 10 μ mol/L and 10 to 100 μ mol/L, with the sensitivity of −3.10 μ A/( μ mol/L) and −0.91 μ A/( μ mol/L), respectively. The detection limit was also calculated as 0.06 μ mol/L (S/N=3) based on the low background signal. Furthermore, the modified electrochemical sensor exhibited good selectivity, repeatability, reproducibility, and stability, thus showing potential application for detecting AA in chinese herbs with good mean recovery and accuracy. In other words, the MoS 2 @MWCNTs/GCE can be used as an excellent platform to detect AAs.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Xueyuan Li,Xuezhong Du
The molybdenum disulfide (MoS 2 ) nanosheets supported Au-Pd bimetallic nanoparticles were synthesized using a facile thermal co-reduction method. The Au-Pd/MoS 2 nanocomposites showed good electrocatalytic activities toward the reduction of hydrogen peroxide (H 2 O 2 ) in neutral solution and the oxidation of glucose in alkaline solution, attributed to the synergistic effects of the Au-Pd bimetallic nanoparticles and MoS 2 nanosheets. The fabricated non-enzymatic electrochemical sensors exhibited the linear responses of H 2 O 2 and glucose in the concentration ranges of 0.8 μM–10 mM and 0.5–20 mM with the detection limits of 0.16 μM and 0.40 mM (S/N = 3), respectively, together with good stability and reproducibility. The Au-Pd/MoS 2 nanocomposites provide new potential materials for the development of other non-enzymatic sensors.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Feili Lai,Yue-E Miao,Yunpeng Huang,Youfang Zhang,Tianxi Liu
To remit energy crisis and environmental deterioration, non-noble metal nanocomposites have attracted extensive attention, acting as a fresh kind of cost-effective electrocatalysts for hydrogen evolution reaction (HER). In this work, hierarchically organized nitrogen-doped carbon nanofiber/molybdenum disulfide (pBC-N/MoS2) nanocomposites were successfully prepared via the combination of in situ polymerization, high-temperature carbonization process, and hydrothermal reaction. Attributing to the uniform coating of polyaniline on the surface of bacterial cellulose, the nitrogen-doped carbon nanofiber network acts as an excellent three-dimensional template for hydrothermal growth of MoS2 nanosheets. The obtained hierarchical pBC-N/MoS2 nanocomposites exhibit excellent electrocatalytic activity for HER with small overpotential of 108 mV, high current density of 8.7 mA cm–2 at η = 200 mV, low Tafel slope of 61 mV dec–1, and even excellent stability. The greatly improved performance is benefiting from the highly exposed active edge sites of MoS2 nanosheets, the intimate connection between MoS2 nanosheets and the highly conductive nitrogen-doped carbon nanofibers and the three-dimensional networks thus formed. Therefore, this work provides a novel strategy for design and application of bacterial cellulose and MoS2-based nanocomposites as cost-effective HER eletrocatalysts.
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PubMed
高影响因子
Journal of Sulfur Chemistry
·
2025
·
IF 1.6
Yongpeng Ma,Jianghui Du,Haobing Yan,Chaobin Shi
Molybdenum disulfide (MoS2) is considered a favorable absorbent for removing heavy metals. However, due to its various morphologies, MoS2 exhibits significant differences in its performance for removing mercury from flue gas. In the present study, the flower-like, spherical MoS2 and W-MoS2 were prepared by regulating the interlayer spacing and doping tungsten (W) in MoS2 for removing gaseous mercury (Hg0). The results show that the number of active sulfur sites (S2- and S22-) was critical to the adsorption performance of MoS2 for Hg0. The flower-like MoS2 demonstrated optimum properties below 125°C which attributed to the presence of dominated S2- sites, while spherical MoS2 and W-MoS2 showed a wider application temperature range (up to 175°C) during Hg0 removal which attributed to the unsaturated sulfur S22- and active oxygen. In terms of the mechanism, Hg0 is directly inserted into the Mo-S bond of MoS2 to form a transition state [Hg·Mo]-S, and then the original Mo-S is interrupted to form a new β-Hg-S bond, or combine with surface oxidation to form HgO. The oxygen in the flue gas can supplement the surface active oxygen on the MoS2, which enables the circulation of Mo5+. Hg0 also reacted with S22- to form α-HgS.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Bingjie Xu,Dan Yu,Chenlu Xu,Yujie Gao,Hengqiu Sun,Lei Liu,Yang Yang,Dongming Qi,Jindan Wu
Innovative antibacterial therapies using nanomaterials, such as photothermal (PTT) and photodynamic (PDT) treatments, have been developed for treating wound infections. However, creating secure wound dressings with these therapies faces challenges. The primary focus of this study is to prepare an antibacterial nanofiber dressing that effectively incorporates stable loads of functional nanoparticles and demonstrates an efficient synergistic effect between PTT and PDT. Herein, a composite nanofiber mat was fabricated, integrating spherical molybdenum disulfide (MoS 2 ) nanoparticles. MoS 2 was deposited onto polylactic acid (PLA) nanofiber mats using vacuum filtration, which was further stabilized by sodium carboxymethyl cellulose (CMC) adhesion and glutaraldehyde (GA) cross-linking. The composite nanofibers demonstrated synergistic antibacterial effects under NIR light irradiation, and the underlying mechanism was explored. They induce bacterial membrane permeability, protein leakage, and intracellular reactive oxygen species (ROS) elevation, ultimately leading to >95 % antibacterial activity against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), which is higher than that of single thermotherapy (almost no antibacterial activity) or ROS therapy (about 80 %). In addition, the composite nanofiber mats exhibited promotion effects on infected wound healing in vivo. This study demonstrates the great prospects of composite nanofiber dressings in clinical treatment of bacterial-infected wounds.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2022
·
IF 5.477
Yixin Pan,Chen Zhang,Guodong Sheng,Manli Li,Wensheng Linghu,Rui Huang
Background This work aims at developing a nanocomposite in which ferrous sulfide nanoparticles are loaded onto molybdenum disulfide (MoS 2 @FeS) for the removal of U(VI) from an aqueous solution. Methods The removal process was carried out by batch experiment. Characterizations of MoS 2 and MoS 2 @FeS before and after reaction have been studied by SEM-EDS, TEM, FTIR, XRD, XPS, and BET analysis. Significant findings Reductive conversion of U(VI) to U(IV) was the primary reaction mechanism, where S(-Ⅱ) is the predominant reductant. At the same time, the functional groups of -S, Fe-O, and Fe-OH can adsorb different U(Ⅵ) species. Moreover, the effects of pH, adsorbent dosage, initial concentration, reaction time, and temperature on removal were discussed and compared by batch experiments, and the outcomes show that the U(VI) removal quantity of MoS 2 @FeS is generally higher than MoS 2 at the same condition. Finally, different kinetic models, isotherm models, and thermodynamic parameters are introduced to further explore the adsorption process and types of MoS 2 and MoS 2 @FeS under various pH and temperatures, which demonstrate that the two materials fit well with the pseudo-second-order model and Freundlich model. This work provides a new idea that MoS 2 @FeS nanocomposite has high superiority and prospects for the effective decontamination of U(VI).
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高影响因子
OPTICS LETTERS
·
2015
·Vol. 40
·期 15
·3576-3579
·
IF 3.292
Jin-hui Chen,Guo-qing Deng,Shao-cheng Yan,Cheng Li,Kai Xi,Fei Xu,Yan-qing Lu
Based on the liquid exfoliated method, we obtained the few-layer molybdenum disulfide (MoS2) nanoplates solution. By thermal evaporation method, we directly deposited MoS2 thin film onto the facet of a fiber patch cord. The modulation depth of the film is as high as 29%, and a Q-switched fiber laser was achieved. We also provided a new method to continuously tune the output laser with a tuning sensitivity of ∼5.5 nm/(1% strain) by controlling the cavity loss with a strained microfiber coupler (MFC).
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高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Xiaming Feng,Weiyi Xing,Hongyu Yang,Bihe Yuan,Lei Song,Yuan Hu,Kim Meow Liew
Herein, the molybdenum disulfide (MoS2) was simultaneously exfoliated and noncovalently functionalized by ultrasonication in a Pluronic aqueous solution and then was used to prepare the poly(ethylene oxide) (PEO) based nanocomposite films. The homogeneous dispersion of MoS2 and strong nanosheets/matrix interfacial adhesion were confirmed by representative electron microscopes. The considerable barrier action of the effective MoS2 nanosheets obviously restricted the ordering of crystal lamellae and the motion of polymer chains and then resulted in the formation of the devastated spherocrystal structure and morphological alterations in the nanocomposites, which were confirmed by polarized optical microscopy and the high value of the glass transition temperature. Importantly, MoS2 nanosheets hold great promise in reinforcing the thermal stability and mechanical property of polymer by increasing the effective volume of MoS2 nanosheets. A substantial reinforcement effect of PEO/MoS2 composite films was achieved: even at a relatively low loading level (0.9 wt %), 88.1% increase in Young’s modulus, 72.7% increase in stress-at-failure, and 62.1 °C increment of the temperature corresponding to half weight loss were obtained. These significant reinforcements can be attributed to the gradient interface region, which could effectively transfer the stress from the weak polymer chains to the robust nanosheets, thus endowing the PEO/MoS2 composite films with excellent properties.
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