JOURNAL OF NANOPARTICLE RESEARCH
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2022
·Vol. 24
·期 3
·1-9
·
IF 2.533
Xia Jiale,Ren Xiangling,Zhao Lirong,Tang Ming,Tan Longfei,Fu Changhui,Wu Qiong,Ren Jun,Ding Minghui,Meng Xianwei
CdS@MoS 2 nanocomposites (NCs) were successfully prepared through a simple hydrothermal reaction. The morphology and structure of MoS 2 nanoflowers on CdS nanorods could be regulated by the change of the mass percentage of MoS 2 . The adsorption efficiency and photocatalytic activity of CdS@MoS 2 NCs were investigated by the adsorption and photocatalytic degradation of Rhodamine 6G. Interestingly, with the increase of MoS 2 ratio in the NCs, the adsorption effect of CdS@MoS 2 NCs increased significantly. These CdS@MoS 2 NCs showed a strong ability to process Rhodamine 6G, and could deal with up to 95% Rhodamine 6G within 1 h. Graphical abstract CdS@MoS 2 nanocomposites with tunable shape were synthesized through a hydrothermal method and possess high performance in the removal of Rhodamine 6G
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Zhijun An,Yufeng Hu,Di Zhang,Hao Zhou,Jingjing Zhan,Minghuo Wu
Fenton-like reaction was considered one of the most prospective advanced oxidation processes in the removal of organic pollutants . To achieve efficient degradation of sulfonamides (SAs) in water, MoS 2 /SiO 2 composites (M@Si) were fabricated by a simple “one-pot” process and packed as fixed-bed reactors (FBR) for Fenton-like reaction. The SEM and XRD results showed the nano-sized MoS 2 particles (400 – 600 nm) were attached to the SiO 2 particles, confirming the successful fabrication of M@Si composites. The operation conditions for the M@Si FBR were systematically optimized, including H 2 O 2 concentration, Fe 2+ concentration, pH, bed height and flow rate, and the degradation rate of > 95% was realized for sulfisoxazole (20 mg/L) at a residence time of 15 s. M@Si Fenton FBR could enhance the Fe 3+ /Fe 2+ cycle for producing hydroxyl radicals (·OH) and self-generate singlet oxygen ( 1 O 2 ) from the interaction between H 2 O 2 and MoS 2 . Moreover, the M@Si FBR could be operated for over six days without the plunge of degradation efficiency. Finally, M@Si FBR was successfully applied in the degradation of SAs in pond water, demonstrating the application prospect of this reactor. This system presented a simple MoS 2 based Fenton catalyst for the efficient activation of hydrogen peroxide for the removal of antibiotics in continuous flow mode.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xuepeng Ni,Huifang Chen,Chenglin Liu,Fanlong Zeng,Houyong Yu,Anqi Ju
In this work, a 3D flexible freestanding nitrogen-doped carbon nanofiber/MoS 2 nanoflowers (NCNFs/MoS 2 ) network with expanded interlayer spacing is fabricated by facile electrospinning and hydrothermal synthesis method, which is employed as flexible free-standing anodes for lithium-ion batteries (LIBs) without any additives. A poly(acrylonitrile- co - β -methylhydrogen itaconate) copolymer is synthesized and uses as a precursor to improve the conductivity and flexibility of NCNFs. The three-dimensional open structure of NCNFs/MoS 2 provides a highly conductive pathway for fast transfer of charge and electron, and expanded interlayer spacing of MoS 2 nanoflowers can increase available surface active sites for Li-ion and reduce the obstacle of Li-ion migration during lithiation/delithiation process. Moreover, it can relieve large internal stress and accommodates volume change during cycling. The NCNFs/MoS 2 composite delivers a high capacity of 1168.6 mA h g −1 at a current density of 5A g −1 and an excellent reversible capacity retention of 94.49% after 1000 cycles (only 0.055‰ decay per cycle), which makes it one of the highest capacities and best cycling stability ever reported to date. It also exhibits a superior rate capacity of 909.5 mA h g −1 at current densities 10A g −1 , indicating the 3D flexible freestanding NCNFs/MoS 2 composite network has potential application in high-performance lithium-ion batteries.
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JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Xiaorong Gan,Huimin Zhao,Dangyuan Lei,Peifang Wang
Liquid phase exfoliation (LPE) is a promising method for synthesizing two-dimensional (2D) 2H-MoS 2 due to the balance obtained in the resulting yield and quality. Improvements in the electrocatalytic activity of 2D 2H-MoS 2 are typically attributed to an increased number of active sites at the plane edges. However, the conclusion need be carefully redefined in the case of LPE, because the covalent surface modification and solvent intercalation between layers can affect the electrocatalytic activity as well. In this study, bulk 2H-MoS 2 was exfoliated in three typical solvents, including N, N-dimethyl formamide (DMF), formamide, and 1-methyl-2-pyrrolidinone (NMP), to synthesize 2H-MoS 2 nanosheets . X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectrum were used to confirm the possibility of surface and interface functionalization of the 2H-MoS 2 nanosheets. Further, the effects on the electrocatalytic activity of 2H-MoS 2 nanosheets were investigated mainly by density functional theory periodic calculations based on the analysis of electronic energy band structures. The results have demonstrated that 2H-MoS 2 nanosheets prepared in formamide exhibit smaller average size and thickness, and higher electrocatalytic activity. The surface functionalization of the 2H-MoS 2 nanosheets is indeed generated by Mo-N covalent bonds due to the presence of S vacancies. Such covalent functionalization leads to a slight decrease of energy band gap with 0.03 eV in a (3 × 3 × 1) 2H-MoS 2 supercell. In contrast, the interface functionalization formed by the intercalation of solvent molecules (e.g., formamide) between layers can cause a remarkable decrease in the band gap of (1 × 1 × 2) 2H-MoS 2 , the phase transition from semiconductor to semimetal , higher carrier mobility, and smaller effective mass ( m e = 0.052 m 0 ).
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FUEL
·
2024
·
IF 6.7
Yao Wang,Tengyang Gao,Ruiting Li,Yan Chen,Wen Luo,Yang Wu,Yu Xie,Yong Wang,Yifan Zhang
Photocatalytic hydrogen production through water splitting is an appealing technology to alleviate the escalating fossil fuel energy crisis. The advancement of visible-light-driven hydrogen production systems is a crucial aspect of hydrogen research. In this study, we successfully synthesized a unique acorn leaf-like CdS/MoS 2 material via a hydrothermal method , with layered deposited MoS 2 nanosheets, for driving hydrogen generation under illumination. By systematically varying the sodium molybdate concentration, we looked into how the MoS 2 affected the optical properties and photocatalytic performance of the acorn-leaf-like CdS/MoS 2 . Under illumination, the photocatalytic hydrogen production performance of the acorn leaf-like CdS/MoS 2 reached 70.05 mmol·g −1 ·h −1 (at a catalyst dosage of 10 mg), which is approximately 330 times higher than the unmodified CdS original material. It was determined that the apparent quantum yield at 450 nm was 2.104 %, corresponding to a solar-to-hydrogen conversion efficiency of 9.383 %. Mechanistic investigations revealed that MoS 2 nanosheets function as co-catalysts and electron acceptors, effectively promoting electron transfer and the separation of photogenerated charge carriers from CdS, thereby consequently enhancing the kinetics of surface hydrogen evolution. This work offers valuable insights into the development of efficient photocatalysts with anti-photocorrosion properties for sustainable hydrogen production.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yizhen Ke,Linna Mao,Wenjing Jie,Tianxun Gong,Wen Huang,Xiaosheng Zhang
Tunability of facilitation in short-term memory (STM) provides great potential in bioinspired computing. Recently, several doping strategies were proposed to modify the intrinsic features of materials, resulting in the optimization of the facilitation index (FI). However, real-time scale tuning, which is implemented on the same synaptic device, has not yet been demonstrated. Inspired by the chemical-electrical mixed synapse structure in the brain, we propose a three-terminal artificial synapse based on an ion-gated MoS2 memristor. The gate terminal serves as a nonvolatile ionic pump via chemical intercalation, which effectively affects both the conductance baseline and the hysteresis degree of the STM effect of the memristor. We further modeled the postsynaptic current (PSC) behavior and used it for reservoir computing. Simulation results show that, due to the real-time tuning ability, the built reservoir can be programmed for specific handwritten recognition tasks with the pruning of neurons from 784 to 50. The developed artificial mixed synapse is promising for a downsampling module in neural network design.
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Nanoscale
·
2014
·Vol. 6
·期 16
·9713-9719
·
IF 6.739
Lili Tao,Hui Long,Bo Zhou,Siu Fung Yu,Shu Ping Lau,Yang Chai,Kin Hung Fung,Yuen Hong Tsang,Jianquan Yao,Degang Xu
Due to the relatively weak van der Waals (VDW) force between interlayers, few-layer MoS2 nanosheets are prepared using a simple ultrasonic exfoliation method and incorporated into PMMA. The good nonlinear optical (NLO) property of the MoS2/PMMA composite for the nanosecond pulsed laser at both 532 and 1064 nm has been first reported. The size, thickness and atomic structure of MoS2 nanosheets have been characterized by transmission electron microscopy (TEM) and atomic force microscopy (AFM). The interesting dependence of interlayer separation with respect to the layer number of MoS2 has been successfully quantified. The average interlayer separation of the MoS2 nanosheets increases and deviates much from the theoretical value with reducing the layer number. Such few-layer MoS2 nanosheets have been homogeneously incorporated into solid-state PMMA, which shows low optical limiting thresholds, 0.4 and 1.3 J cm−2, and low limiting differential transmittance (TC), 2% and 3% for the nanosecond laser operating at 532 nm and 1064 nm, respectively. The results suggest that MoS2 nanosheet incorporated PMMA is a promising candidate of the solid NLO material for optical limiting applications.
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JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Chulong Pan,Miao Cheng,Ruirui Wang,Qianqian Liu,Jing Hu,Tao Wei,Muzi Chen,Bo Liu,Wanfei Li
The commercialization of rechargeable magnesium ion batteries (MIBs) faces a critical challenge in exploiting high-performance cathodes, owing to the sluggish kinetics resulting from the robust Coulombic interaction between doubly charged Mg 2+ ions and the intercalation host. Herein, a polyaniline (PANI) intercalated lithiation‐assisted exfoliation of MoS 2 (Li x -MoS 2 @PANI) cathode is developed through an initial chemical lithiation and delamination of commercial MoS 2 with n-butyllithium, followed by in-situ growth of PANI into the MoS 2 interlayers. Notably, the obtained Li x -MoS 2 @PANI displays a graphene-like nanosheet morphology with the interlayer spacing expanded to around 0.74–1.09 nm. The down-sizing of the exfoliated MoS 2 and expanded interlayer spacing could efficiently shorten ion diffusion distance and improve Mg 2+ diffusion kinetics by weakening the strong Mg 2+ -host interactions. Moreover, the intercalated PANI is expected to enhance the conductivity and accommodate the volume changes upon prolonged cycling. The synergistic effects of the above boost the electrochemical performance of Li x -MoS 2 @PANI cathode, achieving high specific capacity, excellent rate capability even at an ultra-high rate of 15.0C and unprecedented long-term cycling stability with a reversible capacity of 140.5 mAh g −1 at 15.0C up to 2800 cycles. This work offers an efficient and universal modification strategy to rational design high-performance intercalation-type cathodes for MIBs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Fangshuo Jia,Yujuan Zhang,Xiaolong Ma,Zihao Zheng,Fuqiang An,Tuoping Hu
Water electrolysis coupling methanol oxidation is an energy-efficient hydrogen generation technology, while obtaining high-value formic acid, however, superior catalysts are often required to achieve efficient hydrogen production. Herein, the n - n heterojunction (NiCo 2 S 4 -MoS 2 ) composed of NiCo 2 S 4 nanoparticles uniformly dispersed on ultrathin MoS 2 nanosheet arrays has been prepared through hydrothermal-pyrolysis process. At a current density (j) of 10 mA cm −2 , the potentials of NiCo 2 S 4 -MoS 2 for methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) are respectively 1.282 V and −36 mV with very high selectivity for formic acid. Importantly, under the same conditions, by using the n - n heterojunction as electrodes, the voltage (1.355 V) of the methanol electrolysis is 216 mV lower than that of the water electrolysis. Meanwhile, at higher j of 100 mA cm −2 , the voltage of the methanol electrolysis is only 6.8 % higher than the original after 150 h chronopotentiometry (CP) test. The outstanding performance of NiCo 2 S 4 -MoS 2 exceeds that previously reported in most literature, which is primarily attributed to the fact that the built-in electric field (BEF) derived from the Fermi level (E F ) difference between NiCo 2 S 4 and MoS 2 , accelerates the charge transfer, optimizes the electronic structure of the heterojunctions, and thus improving the electrical conductivity. Furthermore, MoS 2 nanosheet arrays with large specific surface area provide a fast charge/mass transfer channel, uniformly dispersed NiCo 2 S 4 and defect sites produce abundant active sites. And the superior hydrophilicity and aerophobicity of the heterojunction surface accelerate the reaction kinetics. Finally, density functional theory (DFT) calculations show that the formation of the heterojunction optimizes the electron density and d-band center of composites, thus enhancing H* adsorption and CH 3 OH dehydrogenation kinetics.
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PubMed
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-6
·
IF 5.578
Xiong Xiaoqin,Luo Wei,Hu Xianluo,Chen Chaoji,Qie Long,Hou Dongfang,Huang Yunhui
A flexible membrane consisting of MoS 2 /carbon nanofibers has been fabricated by a simple electrospinning method. MoS 2 nanosheets are uniformly encapsulated in the inter-connected carbon nanofibers with diameters of ~150 nm. When evaluated as a binder-free electrode for sodium-ion batteries, the as-obtained electrode demonstrates high performances, including high reversible capacity of 381.7 mA h g −1 at 100 mA g −1 and superior rate capability (283.3, 246.5 and 186.3 mA h g −1 at 0.5, 1 and 2 A g −1 , respectively). Most importantly, the binder-free electrode made of MoS 2 and carbon nanofibers can still deliver a charge capacity of 283.9 mA h g −1 after 600 cycles at a current density of 100 m A g −1 , indicating a very promising anode for long-life SIBs.
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PubMed
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PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Wenyan Zhou,Tong Wang,Yanan Pu,Lin Cao,Wen Li,Jiaxin Huang,Huimeng Feng,Shougang Chen
The research on intelligent corrosion inhibition and repair protective coatings is currently underway, with a particular focus on the intricate microstructure failure process of these coatings due to the inherent complexity of their fillers (functionality, interfacial compatibility, etc.). Herein, we developed corrosion inhibition nanocontainers with enhanced photothermal and pH-responsive properties. The incorporation of chitosan facilitated the acidic environment responsiveness of the nanocontainers, while MoS 2 nanocontainers enabled light-triggered release. The electrochemical results show that after 60 days, the impedance modulus of epoxy coating with 1 % nanocontainers is 4.35 × 10 8 Ω·cm 2 , while that of pure epoxy coating is 2.09 × 10 6 Ω·cm 2 . And it can achieve 300 h of salt spray resistance. In addition, the mechanical properties show that the adhesion and tensile properties of the coating are improved, and the saturated water absorption of the coating is decreased. In addition, the evolution of its electrochemical structure was comprehensively studied using relaxation time analysis. The research results indicate that the coating exhibits multiple electrochemical processes, and the controlled release and formation of a protective layer effectively hinder the formation of corrosion products and reduce internal electrochemical reactions. This study provides a potential method for studying the structural evolution of composite coatings.
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Nano Energy
·
2025
·
IF 17.1
Huanchi Chen,Yuxuan Zhang,Gang Zhao,Bingzhe Jia,Xinming Wu
Transition metal sulfides exhibit excellent energy density and specific capacitance in redox enhanced supercapacitors. However, the phenomenon of rapid self-discharge limits their large-scale development. In this study, we have analyzed an innovative and simple preparation of polydopamine (PDA) coated CoS 2 @MoS 2 @CC for redox enhanced supercapacitors applications. Considering the suppression the self-discharge of supercapacitors while also improving electrochemical performance of electrode. Subsequently, the densities of states, differential charges and adsorption energies of the PDA@CoS 2 @MoS 2 @CC and CoS 2 @MoS 2 @CC electrodes were calculated by using density functional theory (DFT) to investigate the mechanism of the effect of polydopamine on the performance of supercapacitors. PDA@CoS 2 @MoS 2 @CC electrode reveals a large specific capacitance (3520.45 mF cm −2 ) and outstanding cycling stability (92.75 % capacity maintenance after 10,000 cycles at 1 mA cm −2 ). This is because of the strong interaction between the PDA coating and K + , while K + are adsorbed in the PDA@CoS 2 @MoS 2 @CC electrode with high adsorption energy (-2.59 eV). It is convenient for the storage of K + . Therefore supercapacitors assembled with PDA@CoS 2 @MoS 2 @CC electrode also exhibit excellent performance (specific capacitance, energy density and power density are 511.85 mF cm −2 , 0.74 Wh cm −2 and 1.53 W cm −2 at 0.5 mA cm −2 ). It is important to investigate the self-discharge performance of the supercapacitor constructed by PDA@CoS 2 @MoS 2 @CC. Notably, the voltage of this device decreases to 0.73 V after 20000 s (initial potential is 1.7 V), which is better than the device assembled by CoS 2 @MoS 2 @CC (0.6 V after 20000 s). Further, the leakage current of this device is also less than the device assembled by CoS 2 @MoS 2 @CC at 1.7 V (0.05 mA vs 0.08 mA). This effective self-discharge suppression strategy is due to the free radical/singlet oxygen scavenging properties of PDA, which limits the parasitic Faraday reaction induced by diffusion-controlled, thus mitigating self-discharge.
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