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
·
表面工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Linshuang Liu,Haipeng Song,Shiqi Zhao,Huan Zhang,Peng Chen,Jingjing Wu,Feifei Jia,Shaoxian Song
Based on the strong activation activity and affinity of Co and MoS 2 for peroxymonosulfate (PMS), respectively, in this study, a CoS 2 /MoS 2 @chitosan (CoS 2 /MoS 2 @CS) gel with favorable photo responsive behavior was synthetically synthesized for more potent degradation of tetracycline (TC). It was found that CoS 2 /MoS 2 @CS had excellent catalytic active for the degradation of TC under visible light irradiation. The presence of CoS 2 /MoS 2 interfacial structure improve the electron transfer ability of the MoS 2 interface, and the degradation rate of TC was increased from 0.0106 min −1 to 0.0463 min −1 , with a high degradation rate of 97.4 %. CoS 2 /MoS 2 can effectively degrade TC within 5 cycles, demonstrating superior cycling stability. In addition, the system degraded different organic pollutants (tetracycline (TC), tetracycline hydrochloride (TCH), crystal violet (CV), and methylene blue (MB)) with a degradation rate higher than 96 %, which supports the ability of the CoS 2 /MoS 2 @CS-PMS system to degrade various chemical contaminants. Quenching analysis indicates that SO 4 •− is the primary reactive chemical free radical for the degradation of TC in the CoS 2 /MoS 2 @CS-PMS system. It provides an approach of combining the synergistic action of Co (II) and photogenerated carriers for more efficient activation of PMS that some inspirations of heterojunction catalysts for AOP applications.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2019
·Vol. 12
·期 3
·1958-1966
·
IF 6.97
Peng Yang,Yabing Shan,Jing Chen,Garel Ekoya,Jinkun Han,Zhi-Jun Qiu,Junjie Sun,Fei Chen,Haomin Wang,Wenzhong Bao,Laigui Hu,Rong-Jun Zhang,Ran Liu,Chunxiao Cong
Monolayer MoS2 is a direct bandgap semiconductor which is believed to be one of the most promising candidates for optoelectronic devices. Chemical vapor deposition (CVD) is the most popular method to synthesize monolayer MoS2 with a large area. However, many defects are always found in monolayer MoS2 grown by CVD, such as sulfur vacancies, which severely degrade the performance of devices. This work demonstrates a concise and effective method for direct growth of high quality monolayer MoS2 by using SiO2/Si substrates pretreated with sulfur vapor. The MoS2 monolayer obtained using this method shows about 20 times PL intensity enhancement and a much narrower PL peak width than that grown on untreated substrates. Detailed characterization studies reveal that MoS2 grown on sulfur vapor pretreated SiO2/Si substrates has a much lower density of sulfur vacancies. The synthesis of monolayer MoS2 with high optical quality and low defect concentration is critical for both fundamental physics studies and potential practical device applications in the atomically thin limit.
研究领域:
材料科学
·
光学
·
半导体物理
✓ 已验证
DOI
PubMed
高影响因子
iScience
·
2024
·
IF 4.6
Meng Wang,Xiaoyu Li,Yanrui Su,Jiaoge Wu,Tian Sun,Xuan Xu,Faying Fan,Yufei Zhao,Wa Gao
Fenton or Fenton-like reactions have been widely used in various fields, including solar energy conversion to generate hydroxyl radicals, environmental remediation, biology, and life science. However, the slow Fe 3+ /Fe 2+ cycle and narrow applicable pH range still present significant challenges. Here, a heterostructured CoFe-layered double hydroxide/MoS 2 nanocomposite (CoFe-LDH/MoS 2 ) was prepared via simple electrostatic interactions. The heterostructure establishes a robust interfacial contact, leading to an abundance of exposed Mo 6+ sites. Consequently, the developed CoFe-LDH/MoS 2 +H 2 O 2 system exhibited superior performance in the degradation of tetracycline (>85%) within 60 min across a wide pH range from acidic to basic. Moreover, the CoFe-LDH/MoS 2 heterojunction catalysts exhibited exceptional resistance to common anions and efficiently degraded various organic pollutants. The mechanism study verified that the CoFe-LDH/MoS 2 had high efficiency in producing 1 O 2 and ‧OH to degrade various organic pollutants. The present study will serve as a foundation for creating efficient catalyst systems for related environmental remediation.
研究领域:
环境科学
·
催化材料
·
污染治理
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongwei Xu,Xiaxia Chen,Chao Liu,Mingyang Xu,Chenxi Guo,Yinglong Wang,Zhaoyou Zhu,Fanqing Meng
The presence of hexavalent chromium(Ⅵ) Cr(Ⅵ) and antibiotics in the environment can lead to the formation of combined pollutants that are harmful to ecosystems. To address this problem, we synthesized MoS 2 embedded in the porous super-hydrophilic polyurethane (PU) sponge and used weak water flow to drive the piezoelectric catalytic synergistic degradation of Cr(Ⅵ) and tetracycline (TC). In this study, the piezoelectric properties of MoS 2 /PU were confirmed via piezoresponse force microscopy (PFM) and COMSOL multiphysics calculations. Additionally, dynamics experiments, quenching experiments, electron paramagnetic resonance (EPR) spectroscopy, three-dimensional fluorescence excitation-emission matrix (3D-EEM) spectroscopy, and free radical generation rate analysis were conducted to explore the removal performance and mechanisms of MoS 2 /PU on the TC-Cr(VI) system. The results indicated that the coexistence of the two pollutants promotes the transfer of charge in MoS 2 /PU, further combined with O 2 to produce H 2 O 2 and continued to produce OH. The removal rates of TC and Cr(VI) in the TC-Cr (VI) mixed system at 30 min were 97 % and 94 %, respectively, which were 1.45 and 1.46 times those of the single TC and single Cr(VI) systems, respectively. Finally, potentially vulnerable sites of TC were calculated and analyzed according to density functional theory (DFT). Our results provide a new strategy for improving the degradation efficiency of antibiotics and Cr(VI) metals.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 48
·2412844
·
IF 27.4
Xinyi Zhang,Linyu Hu,Kemeng Zhou,Linqing Zhang,Xiaolong Zeng,Yuqing Shi,Weizheng Cai,Jiazhen Wu,Yuanjing Lin
Aqueous zinc-ion batteries with superior operational safety have great promise to serve as wearable energy storage devices. However, the poor cycling stability and low output voltage limited their practical applications. Here, fully printable Zn/MoS 2 -MnO 2 micro-batteries are developed and demonstrated significantly enhanced cycling stability with sweat activation. 2D MoS 2 is utilized to enable lattice-matching with Zn powders to realize printed Zn anodes with desirable stability and promote electron/ion transfer. Interestingly, the mild acid epidermal sweat also contributed to eliminating the MnO 2 cathode by-products and compensating for the hydrogel electrolytes' water loss. The Zn/MoS 2 -MnO 2 micro-batteries achieve a high specific capacity of 318.9 µAh cm −2 at the current density of 0.16 mA cm −2 , and an energy density of 424.6 µWh cm −2 , with remarkable cycle stability of ≈90% after 250 cycles. In-battery electrochromic display of capacity level and feasible electronics charging are demonstrated. The as-printed micro-batteries with innovative sweat activation would inspire the advances of sustainable power supply for wearables.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zhiyuan Yu,Tianyi Huang,Shafqat Ullah,Yujun Wang,Guangsheng Luo
1T-phase MoS2, a versatile two-dimensional transition-metal dichalcogenide, is typically synthesized using a one-pot hydrothermal method. However, inadequate control of the sulfurization, reduction, and crystallization processes in the autoclave leads to multilayer 1T-MoS2 with high crystallinity, a small surface area, and few defects. Considering the aforementioned issues, a two-stage microreactor continuous hydrothermal flow synthesis (CHFS) system coupled with accurate control and rapid processing is used to prepare 1T-MoS2 with abundant voids and a large surface area under 250 °C and 4.0–4.5 MPa. And density functional theory calculations reveal that nitrogenous species, acting as reductants and electron donors, lower the energy of 1T-MoS2 by intercalation and surface adsorption, facilitating its swift synthesis within the presulfurization stage for 10 min and reduction stage for 24 min. The precisely controlled synthesis of porous 1T-MoS2, originating from prenucleation clusters, results in a large surface area of 201.5 m2/g, concentrated mesopores of 2–5 nm, and a pore volume of 0.58 cm3/g. Moreover, a significant transformation from the 1T to the 2H phase is prevented by rapid cooling downstream of the CHFS system.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yichen Yin,Nan Wang,Bin Hu,Jiaxuan Guo,Qian Chen,Zheng Chen,Mohammad-Ali Shahbazi,Lissette Agüero,Shige Wang,Cheng Li
Inorganic nanoparticles serve as versatile nanoplatforms for efficient cancer diagnosis and therapy. However, their limited in vivo degradability and excretion rates may lead to various adverse effects. Furthermore, the cascade-controlled release of drugs remains a challenge. In this study, we developed a free-radical triggered degradable MoS 2 -AIPH@LA nanoplatform for tumor photothermal and oxygen-independent thermodynamic therapy. This was achieved by loading the free radical initiator (2,2′-azobis[2-(2-imidazolin-2-yl) propane] dihydrochloride (AIPH)) onto MoS 2 nanoparticles and encapsulating them with thermo-responsive lauric acid (LA). Upon laser irradiation, the hyperthermia generated by MoS 2 induces cancer cell death and releases AIPH, an oxygen-independent and thermal-responsive radical initiator capable of producing toxic alkyl free radicals for tumor therapy and inhibiting bacterial growth. Importantly, these free radicals promote the degradation rate of MoS 2 -AIPH@LA, further facilitating a rapid AIPH release and improving the biocompatibility of the MoS 2 -AIPH@LA nanoplatform. In particular, the thermo-responsive nature of LA in this formulation effectively regulates the release of AIPH, thus reducing potential AIPH leakage into the bloodstream and minimizing safety risks. With its free-radical-triggered degradation and cascade-controlled release capabilities, MoS 2 -AIPH@LA shows significant promise for inhibiting tumor proliferation and managing postoperative bacterial infection.
研究领域:
肿瘤学
·
纳米医学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7439-7448
·
IF 2.7
Xiaoyu Yang,Hongdan Wu,Zhihui Zhou,Yehao Zhao,Yuedong Li
Two-dimensional (2D) layered MoS2 membrane has a unique pore structure, adjustable interlayer spacing and excellent transmission performance, which has wide-ranging and excellent application prospects for water treatment. However, the MoS2 membrane exhibits a narrow interlayer height, which can only accommodate one layer of water molecules, causing low water permeation and flux. In this work, a MoS2/SiO2 composite membrane with regular transport channels was prepared by the vacuum-assisted self-assembly (VASA) process using the intercalation of nano-silica (SiO2) nanoparticles. The resulting membrane showed an increase in interlayer widths from 0.61 nm to 0.69 nm. The MoS2/SiO2 composite membrane featured a high-efficiency dye separation performance and aqueous stability as the mass ratio of MoS2/SiO2 was 2.5, and the water permeance flux could reach 979 L m−2 h−1 bar−1, with a rejection of 100% for Evans blue (EB), methyl blue (MB) and neutral red (NR) and a rejection of over 98% for rhodamine B (RhB). MoS2 membranes decorated by SiO2 nanosheet nanoparticles could effectively achieve precision regulation of interlayer spacings and hold the channel order of MoS2 laminates. In addition, the rejection rate of the composite membrane remained 100% after remaining immersed in strong oxidizing acid for up to 60 days, which showed their stability toward strong acid and oxidative environments. This work suggests that an interlayer manipulation strategy in 2D laminar membranes could improve membrane performance for wastewater treatment and other separations.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Xin-Ni Shao,Yin-Feng Wang,Ming-Yu Qi,Zi-Rong Tang
Simultaneous utilization of photogenerated electrons and holes within a photoredox system enables effective hydrogen (H 2 ) production and organic synthesis, aligning with eco-friendly chemistry principles and current energy challenges. Here, we report the preparation and application of cocatalyst MoS 2 decorated CdS (MoS 2 CdS) composites for the photoredox-mediated C–N coupling of amines to imines and H 2 generation under visible light illumination. The H 2 and N-benzylidenebenzylamine yields for the optimal MoS 2 CdS are 28.9 and 15.0 times higher than those of bare CdS, respectively. Mechanism studies reveal that the enhanced photocatalytic activity results from the MoS 2 acting as an electron sink, which accelerates the separation and migration of photogenerated charge carriers. Additionally, the pH(•CH)NH 2 intermediates are found to play a pivotal role in the dehydrogenative coupling of benzylamine. Furthermore, the MoS 2 CdS composites exhibit universal applicability in the conversion of various aromatic amines into corresponding imines integrated with H 2 evolution.
研究领域:
化学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY LETTERS
·
2020
·Vol. 50
·期 3
·452-455
·
IF 1.361
Han Zhao,Xia Tong,Xu Shiwei,Li Gang,Zhang Liying,Hu Nantao,Yu Jian,Li Bin,Yang Zhi,Zhang Yafei
Wearable energy storage electronics with high safety and long life have been promising candidates in recent years. Herein, all-solid-state planar micro-supercapacitors (MSCs) were demonstrated by inkjet printing of molybdenum disulfide (MoS2) electrodes. The preprinted PEDOT: PSS film on PI (Polyimide) substrate prepared with a simple and low-cost desktop inkjet printer can greatly improve the electrode conductivity. Additionally, the obtained planar MSCs show good electrochemical performance with high areal capacitance of 323 µF cm−2 and areal energy density of 0.016 µWh cm−2. More importantly, the MSCs exhibit outstanding flexibility with almost no degradation under various bending angles. The capacitance retention can still be maintained at 88.5% even after 8000 cycles, indicating good cycle stability of MSCs. The in-plane flexible MSCs hold great application potential for wearable and integrated energy storage electronics.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）