APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Pengpeng Chen,Xiao Liang,Ying Xu,Yifeng Zhou,Wangyan Nie
In this work, MoS 2 nanosheets were employed to reinforce PLA. In order to promote the homogeneous dispersion of MoS 2 in PLA and form a strong interface between MoS 2 and PLA, the MoS 2 nanosheets were firstly modified by mercapto-ethylamine, and then functionalized with PLA chains through ring-opening polymerization of poly( l -lactide). The XRD, XPS, TGA and 1 H NMR characterizations confirmed the successful amino and PLA functionalization of MoS 2 nanosheets. The obtained MoS 2 -g-PLA nanosheets were then introduced to reinforce PLA. SEM images displayed that the MoS 2 -g-PLA nanosheets were dispersed in PLA matrix uniformly. TGA results showed that initial decomposition temperature was improved from 275.6 °C to 334.8 °C with 0.5 wt% of MoS 2 -g-PLA nanosheets. The storage modulus of PLA/MoS 2 -g-PLA-0.5 wt% in the glass state and rubber state were both greatly enhanced compared with neat PLA.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Changchun Sun,Chao Wang,Guangting Han,Yuanming Zhang,Haiguang Zhao
The application of layered molybdenum disulfide (MoS 2 ) in catalytic hydrogen production has attracted great interest, while their catalytic properties are limited by poor electron conductivity and a few catalytically active sites. In this work, we demonstrated a highly active electrocatalyst for large-scale hydrogen production, consisting of two-dimensional (2D) Pt-MoS 2 nanosheets along one-dimensional (1D) cobalt nanoparticle integrated carbon hollow nanofibers (Co@CHNF). The as-prepared Pt-MoS 2 -Co@CHNF had a large specific surface area (44.5 m 2 g −1 ). X-ray photoelectron spectrometer (XPS) and spherical aberration corrected transmission electron microscope (AC-STEM) demonstrated that Pt atomic clusters (Pt ACs) were doped on MoS 2 nanosheets by thermodynamically induced spontaneous interfacial redox between MoS 2 and H₂PtCl₆. The Pt-MoS 2 -Co@CHNF based catalysts exhibited an overpotential as low as 91 mV for 10 mA cm −2 and 258 mV for 200 mA cm −2 in 1 M KOH electrolyte, and there is no significant floating for catalytic active with 14 h continuous operation, which demonstrates its excellent long-term operation durability, significantly superior to the previously reported state-of-the-art Co-based or Mo-based catalysts. In particular, the self-supporting binder-free Pt-MoS 2 -Co@CHNF catalyst-based electrode showed an ultra-high current density of 500 mA cm −2 at a low overpotential of 301 mV, without any decrease after 24 h operation at 500 mA cm −2 in 1 M KOH seawater electrolyte, representing a great potential for large-scale seawater hydrogen production.
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高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Qingqing Hu,Yaoqi Huang,Linfeng Li,Yuanyuan Li,Xiaomin Cheng
The slow heat transfer rate, leakage susceptibility, and low photothermal conversion efficiency of the phase change materials (PCMs) may limit their application in thermal energy storage. To tackle this problem, photothermal composites (MoS 2 -rGO) were prepared by hydrothermal synthesis method, and then polyethylene glycol-6000 (PEG-6000) and MoS 2 -rGO composites were encapsulated in polyacrylamide (PAM) by free radical polymerization to form an integrated photothermal storage system. The melting enthalpy (ΔH m ) of the light-thermal phase change gel (LTPCG) was 140.9 J/g and the crystallization enthalpy (ΔH c ) was 134.8 J/g when the PEG-6000 loading reached 85 %. After 300 cycles, the ΔH m and ΔH c were 137.7 and 132.1 J/g, respectively, which were 2.3 % and 2.1 % lower than the initial values, demonstrating excellent thermal storage durability. In addition, under simulated solar irradiation conditions, the MoS 2 -rGO composites were able to capture photons and rapidly transfer phonons with high efficiency, achieving a photothermal conversion efficiency of 87.5 %. The prepared composite PCM has excellent thermal storage and photothermal properties, which are of practical significance for the efficient use of solar energy.
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高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 52
·2104960
·
IF 30.849
Yunxia Hu,Mingjin Dai,Wei Feng,Xin Zhang,Feng Gao,Shichao Zhang,Biying Tan,Jia Zhang,Yong Shuai,YongQing Fu,PingAn Hu
Biomimetic eyes, with their excellent imaging functions such as large fields of view and low aberrations, have shown great potentials in the fields of visual prostheses and robotics. However, high power consumption and difficulties in device integration severely restrict their rapid development. In this study, an artificial synaptic device consisting of a molybdenum disulfide (MoS 2 ) film coated with an electron injection enhanced indium (In) layer is proposed to increase the channel conductivity and reduce the power consumption. This artificial synaptic device achieves an ultralow power consumption of 68.9 aJ per spike, which is several hundred times lower than those of the optical artificial synapses reported in literature. Furthermore, the multilayer and polycrystalline MoS 2 film shows persistent photoconductivity performance, effectively resulting in short-term plasticity, long-term plasticity, and their transitions between each other. A 5 × 5 In/MoS 2 synaptic device array is constructed into a hemispherical electronic retina, demonstrating its impressive image sensing and learning functions. This research provides a new methodology for effective control of artificial synaptic devices, which have great opportunities used in bionic retinas, robots, and visual prostheses.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Bingkun Liu,Zihao Zhang,Xinying Xie,Wen Zhang,Weijun Tian
Strategic engineering of heteroatomic doping configurations to precisely regulate the directional migration efficiency of photogenerated charge carriers has been demonstrated as a pivotal approach to overcome inherent kinetic limitations in semiconductor-based photocatalytic systems. Li/Co co-doped MoS 2 nanoflower structures (MLC2) were synthesized via a single-step hydrothermal protocol and applied for the photocatalytic degradation of chlorsulfuron in aqueous environments. Density functional theory analysis revealed that Li and Co atoms occupied Mo sites, generating electron-deficient centers that modified photogenerated electron transfer pathways. This strategic doping engineering enhanced charge separation efficiency, as evidenced by transient photocurrent response, electrochemical impedance spectroscopy, and Tafel curves. The optimized MLC2 catalyst demonstrated exceptional degradation performance, achieving 89.72 % chlorsulfuron removal within 360 min under visible light irradiation (λ ≥ 420 nm; 300 W), corresponding to quasi-first-order rate constants (k) 52.46-fold and 3.37-fold higher than those of undoped MoS 2 (k = 1.22 E −4 min −1 ) and Li-MoS 2 (k = 0.0019 min −1 ), respectively. The dominant role of photogenerated electrons, along with their generation and transfer pathways, had been experimentally validated. Furthermore, MLC2 demonstrated considerable potential in practical applications.
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DOI
PubMed
高影响因子
Alexandria Engineering Journal
·
2025
·
IF 6.8
Ke Zhang,ZhiQian Zhao,Jing Huang,Hui Fu,Sicong Jiang,Min Shi
Carcinoembryonic antigen (CEA) is a widely recognized tumor biomarker that plays a critical role in the early detection and prognosis of several cancers, particularly lung, colorectal, and breast cancer. Accurate and sensitive quantification of CEA levels in biological samples is vital for timely diagnosis and effective treatment monitoring. In this study, we present the development and characterization of a novel electrochemical immunosensor utilizing a three-dimensional graphene/MoS₂ composite for detecting CEA. The composite material was synthesized via a one-step hydrothermal process at 200°C and comprehensively characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) analysis. The hierarchical structure combined a highly porous graphene network with flower-like MoS 2 nanoflowers, demonstrating a 2.8-fold increase in effective electrochemical surface area compared to bare electrodes. Under optimized conditions, the immunosensor achieved sensitive CEA detection with a linear response range of 0.001–150 ng/mL and a detection limit of 0.0006 ng/mL. The sensor showed outstanding selectivity in distinguishing CEA from common interfering substances, with signal fluctuations of less than 5 %. Clinical validation using human serum samples showed strong correlation with standard ELISA methods (r = 0.992) and exceptional recovery rates between 94.2 % and 107.0 %. The developed immunosensor exhibited remarkable stability, maintaining 96 % of its initial response after 1 month of storage, while requiring minimal sample volumes (10 μL) and significantly reduced analysis time (40 min).
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-13
·
IF 2.8
Li Zezhong,Xu Jing,Ma Yongqiang,Ma Yue,Liu Zhenlu
Photocatalytic hydrogen production is one of the effective ways of global energy conservation and emission reduction. Herein, we report the successful embedding of flower ball MoS 2 into Sm 2 WO 6 using the hydrothermal method, and p-n heterojunction is obtained successfully. Due to the narrow band gap of MoS 2 , the Sm 2 WO 6 / MoS 2 composite photocatalyst effectively improves the photogenerated carrier separation. The better redox capacity of Sm 2 WO 6 itself also promotes the reduction capacity of Sm 2 WO 6 /MoS 2 . The petals on MoS 2 are closely bound to Sm 2 WO 6 , which enhances the electron transport efficiency and is one of the main factors for improving photocatalytic hydrogen evolution (HER). To explore the performance of Sm 2 WO 6 / MoS 2 by various means of representation. And the HER performance of Sm 2 WO 6 / MoS 2 is evaluated using eosin Y (EY) as sensitizer and TEOA as sacrifice agent. Compared with pure Sm 2 WO 6 , Sm 2 WO 6 / MoS 2 has improved HER performance, and its optimal activity is 142.7 µmol, which is nearly 140 times that of pure Sm 2 WO 6 . This study demonstrates a novel morphology design strategy for composite photocatalysts to promote efficient photocatalytic hydrogen production.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Kaiyu Qi,Zeming Yuan,Yuan Hou,Ruichao Zhao,Bangwen Zhang
MoS 2 nanosheets have been widely explored as LIB anode materials due to higher theoretical capacity and weak interlayer interactions, but limited by their low conductivity and ease of stacking. Herein, we reported a novel Fe doped MoS 2 /reduced graphene oxide (Fe-MoS 2 /rGO) composite as LIB anode material and its one-step synthesis method. The results show that the synthesized Fe-MoS 2 /rGO composite has unique porous heterostructure , where networked Fe-MoS 2 nanosheets of several nm thickness grow upon crumpled rGO sheets with high specific area. Due to the Fe doping as well as the mild synthesis conditions, the resulting Fe-MoS 2 upon rGO sheets has wide interlayer spacing, abundant lattice defects and lower inner resistance. As a result, the Fe-MoS 2 /rGO electrode exhibits significant improvement in electrochemical performance relative to the non-doped MoS 2 /rGO electrode. The reversible capacities of Fe-MoS 2 /rGO electrode reach 1255 mAh/g (2nd circle) and 946 mAh g −1 (100th circle) with a retention of 75.4%. By comparison, the reversible capacities of MoS 2 /rGO electrode are only 654.1 mAh g −1 (2nd circle) and 429 mAh g −1 (100th circle) with a low retention of 64.1%.
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ENERGY & FUELS
·
2022
·
IF 4.654
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Dingbang Yan,Yexin Tian,Jinshui Liu,Ruixuan Tan,Fei Han
Despite the outstanding theoretical capacities of two-dimensional (2D) molybdenum sulfide (MoS2) with low costs, its low conductivity and easy agglomeration greatly impede the business application as anode materials. The heterostructures between 2D MoS2 and Ti3C2 MXene are able to combine the collective superiorities of MoS2 and Ti3C2, thus greatly ameliorating the electrical conductivity and rate capacity through synergistic effects. Herein, we design a simple intercalation–sulfidation strategy for the construction of the TH MoS2/Ti3C2 heterostructures with a compact stacking lamellar structure and investigate the electrochemical sodium storage properties of the composite. In the architecture, fallen leaf-like MoS2 nanosheets with a mixed-phase crystal containing 1T and 2H phases grow tightly on the surface and interlayer of Ti3C2 matrixes. The expanded layer spacing of Ti3C2 as a result of MoS2 insertion can greatly accelerate electronic/sodium ion transport. Meanwhile, 2D Ti3C2 can serve as a strong mechanical support for the composite electrode to provide a buffer space for volume expansion and avoid structural collapse during cycles. Benefiting from these structural advantages, the TH MoS2/Ti3C2 anode reveals higher sodium storage capacity of 743.6 mAh g–1 than bare MoS2 (579.4 mAh g–1) at 0.2 A g–1. Furthermore, the anode exhibits significantly improved battery rate performance with a high sodium storage capacity of 653.3, 539.1, 512.1, 488.7, 439.3, and 586.7 mAh g–1 at 0.2, 0.5, 1, 2, 5, and 0.2 A g–1. Our study provides a unique synthesis route to construct layered heterostructure composites by artificial stacking of different types of 2D materials, which are considered as highly promising electrode materials for sodium-ion batteries (SIBs).
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yifan Zhang,Jie Shi,Xiaoqing Ding,Jiaojiao Wu,Yan-Zhen Zheng,Xia Tao
Unary-organic-cation lead halide perovskites like MAPbI3 have been emerging as tremendous photocatalysts for H2 evolution recently. However, their photocatalytic performances are inferior without modification. Here, a series of mixed-organic -cation perovskites MA1–xFAxPbI3 (M1–xFxPI, x = 0, 0.2, 0.3, 0.4, 0.5) were synthesized by introducing FA+ into MAPbI3 precursor and then composited with MoS2 as photocatalysts for H2 evolution reaction (HER). We demonstrate that the fabricated MoS2/M0.6F0.4PI is highly efficient and ultrastable during the photocatalytic HER process. The optimal MoS2/M0.6F0.4PI composite, i.e., 20 wt % MoS2/M0.6F0.4PI exhibits a visible HER rate of 2131 μmol h–1 g–1, increasing by 88-fold in comparison with pure MAPbI3 (24 μmol h–1 g–1) and better than the optimized Pt/M0.6F0.4PI (1328 μmol h–1 g–1). No activity degradation of 20 wt % MoS2/M0.6F0.4PI occurs in repeated HER experiments. The (photo)electrochemical performances of the composite are studied to reveal the photoinduced charge transfer and consequent HER process.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Huali Tian,Xing Wu,Kaisong Zhang
Tight ultrafiltration (TUF) membrane as a kind of ultrafiltration membrane has great promising applications in wastewater treatment and molecule separation. We report a facile and scalable technique for the fabrication of mixed matrix TUF membrane by physical blending of two-dimensional (2D) molybdenum disulfide (MoS 2 ) with polyethersulfone dope solution. The incorporated MoS 2 sheets affected the phase inversion process and changed the membrane structure. Morphology, molecular weight cut-off, hydrophilicity, and mechanical strength properties of the prepared membranes were investigated. The characterization by field emission scanning electron microscopy confirmed that MoS 2 sheets were successfully embedded in the membranes and transmission electron microscopy confirmed the well-distribution of MoS 2 in the membrane matrix. Results demonstrated that the pore size of membranes was effectively tailored by varying the content of MoS 2 from 0 to 5.0 wt.% in casting solutions. The modified TUF membranes with MoS 2 concentration in the range of 2.5–4.0 wt.% showed an enhanced pure water flux and higher polyethylene glycol (PEG, 10 kDa) rejection compared to the pristine membrane. An optimized pure water flux of 84.7 L m –2 h –1 bar –1 and a superior PEG 10 kDa rejection of 95.2% were obtained for the membrane modified by MoS 2 sheets with a concentration of 3.0 wt.%. Moreover, the as-prepared TUF membrane showed 91.6% rejection rate for a small molecule (rose bengal, 1,017 g mol –1 ), indicating their narrow pore size. This work has highlighted the facile physical blending of MoS 2 and polymeric dope solution, thus providing a promising application for other polymeric ultrafiltration membranes.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wenfeng Wang,Haibo Shu,Jun Wang,Yecheng Cheng,Pei Liang,Xiaoshuang Chen
Recent success in the chemical vapor deposition (CVD) growth of atomically thin transition metal dichalcogenide (TMD) crystals opens up prospects for exploiting these materials in nanoelectronic and optoelectronic devices. However, CVD-grown TMDs often suffer from weak crystal quality because of the formation of defects during the growth, which makes a large impact on their electrical and optical properties. Here, we report a facile synthesis of high-quality MoS2 monolayers through a sodium halide-assisted CVD method. Our results show that the addition of sodium halides into MoO3 precursors leads to the rapid growth of highly crystalline MoS2 monolayers. Moreover, the overall photoluminescence (PL) intensity of MoS2 monolayers can be greatly enhanced by up to 2 orders of magnitude. The PL enhancement originates from that the deep trap states induced by sulfur vacancies are passivated by the substitution doping of halogen atoms, which promotes the emission of excitons and trions. Density functional theory calculations indicate that the band gaps of halogen-doped MoS2 monolayers are slightly smaller than those of pristine MoS2 monolayer, which is responsible for the small red shift of PL peaks (∼30 meV). These findings provide a new route toward engineering electronic and optical properties of MoS2 and other TMD monolayers.
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