ADVANCED POWDER TECHNOLOGY
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2023
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IF 5.2
Shuaikang Zhou,Penghao Li,Hongmei Ji,Gang Yang,Wenhua Hou
Ball milling has been proven to be an efficient method for exfoliating and reassembling heterogeneous layered nanocomposites on a large scale. This study explores the use of ammonium tetrathiomolybdate (NH 4 ) 2 MoS 4 , an ion crystal with an octahedral structure, as both a precursor of layered molybdenum disulfide (MoS 2 ) and an intermediate during ball milling to assist in the exfoliation and fragilization of expandable graphite (EG). Due to its ion crystal structure and high hardness, (NH 4 ) 2 MoS 4 can efficiently transfer and magnify the impacting and shearing forces generated during the ball milling process, accelerating the exfoliation and fragmentation efficiency of EG. Moreover, (NH 4 ) 2 MoS 4 is nano-crystallized by the ball milling forces and uniformly distributed on the carbon nanosheets. Electrochemical performance tests indicate that the resulting nanocomposites, with a satisfactory heterogeneous structure, exhibit excellent Li-storage capacity, achieving 529 mA h g −1 after 150 cycles at a high current density of 500 mA g −1 . The relationship between the microstructure and improved electrochemical performance, as well as the formation mechanism of the product, is discussed in detail. This study provides a new approach for conveniently constructing nanocomposites using two types of layered materials that offer satisfactory rate capability and cyclability, making them potentially suitable for application in Li-ion batteries.
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高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Xuemin Qin,Zhi Luo,Shenglan Hu,Xuyang Deng,Jing Li,Lingling Zheng,Biyang Deng
In conventional co-reactant electrochemiluminescence (ECL), the efficiency of converting co- reactant into active intermediates is the primary factor limiting luminescence intensity. To address this limitation, we synthesized carboxyl-functionalized CdIn 2 S 4 (Cf-CdIn 2 S 4 ), which served dual roles as both a luminescent material and a co-reactant accelerator. As an emitter, Cf-CdIn 2 S 4 , generated strong and stable ECL signals upon excitation at −1.3 V. Furthermore, Cf-CdIn 2 S 4 exhibited remarkable electrocatalytic activity for K 2 S 2 O 8 activation. Through the In 3+ /In 2+ valence state transition, Cf-CdIn 2 S 4 significantly facilitated the conversion of S 2 O 8 2− to SO 4 ·− , achieving self-enhanced ECL signals. The pronounced quenching effect of Au@MoS 2 on the Cf-CdIn 2 S 4 ECL signal was exploited to develop a highly sensitive quenching-type ECL sensing platform for H-FABP. The developed immunosensor exhibited a broad linear detection range (10 fg/mL–100 ng/mL) and a low limit of detection (3.2 fg/mL, S/N = 3). This novel approach provides a highly sensitive and reliable platform for the early diagnosis of acute myocardial infarction and can be effectively utilized for the early screening of cardiovascular diseases and clinical monitoring of critically ill patients.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ni Luo,Cheng Chen,Dingming Yang,Wenyuan Hu,Faqin Dong
In the field of photocatalysis , one focus is on high-performance visible light catalysis. For this study, which follows the defect engineering strategy, ultrathin two-dimensional (2D) S defect-rich MoS 2 nanosheets were created in situ by ball-milling MoS 2 nanosheets with ascorbic acid and then used for the removal of Cr(VI) from wastewater. The results show that ascorbic acid increases both the specific surface area of MoS 2 nanosheets and the concentration of S stripping-defects significantly. Of the samples, D-MoS 2 -3 (i.e., S defect-rich ultrathin 2D MoS 2 nanosheets) exhibited the best Cr(VI) adsorption capacity and photocatalytic activity thanks to its large specific surface area and a high concentration of total S defects (18.5%), 311.1% better than for P-MoS 2 (i.e., pristine MoS 2 nanosheets) (4.5%). The concentration of S point-defects in D-MoS 2 -3 is only a little greater than in P-MoS 2 , but the concentration of S stripping-defects is significantly greater. S point-defects at such a high concentration readily act as recombination centers for photogenerated carriers. By contrast, S stripping-defects that lack dangling Mo-S bonds trap photogenerated holes and add to the separation efficiency of photogenerated electron-hole pairs. As a consequence, the photocatalytic performance of D-MoS 2 -3 in removing Cr(VI) is significantly better. Given this finding, the present study offers a new design pathway and a reference for the practical application of defect engineering to ultrathin 2D materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Chen,Rui-Qiang Yan,Jian-Qun Zhu,Guo-Bo Huang,Zhong Chen
All-solid-state Z-scheme CdS/QDs/ZnIn 2 S 4 architectures with MoS 2 quantum dots as solid-state electron mediator were successfully designed and constructed by optimally combining one-dimensional CdS nanorods, zero-dimensional MoS 2 quantum dots (QDs) and two-dimensional ZnIn 2 S 4 nanosheets. The photocatalytic water splitting for hydrogen evolution demonstrated that such structural design can synergistically trigger remarkably improved visible-light-driven photocatalytic activity. Photocatalytic H 2 -evolution at 2107.5 μmol g −1 h −1 was achieved on this CdS/QDs/ZnIn 2 S 4 architectures under visible light irradiation, exceeding those of bare CdS nanorods and pure ZnIn 2 S 4 nanosheets by a factor of 26 and 62, respectively. This highly efficient photocatalytic activity arises from the effective charge separation and favourable electron mediator of MoS 2 QDs. The Z-scheme charge separation mechanism was verified by the ESR, PL-TA and organic electron acceptor test.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xinli Yang,Qiaojuan Jia,Fenghe Duan,Bin Hu,Minghua Wang,Linghao He,Yingpan Song,Zhihong Zhang
We synthesized a novel composite of multiwall carbon nanotubes (MWCNTs) decorated with MoS 2 quantum dots (MoS 2 QDs) and Ti 3 C 2 T x QDs (denoted by MoS 2 QDs@Ti 3 C 2 T x QDs@MWCNTs), of which MoS 2 QDs and Ti 3 C 2 T x QDs were separately prepared by exfoliating MoS 2 and Ti 3 C 2 T x MXene nanosheets by the hydrothermal method. It showed that the as–prepared MoS 2 QDs@Ti 3 C 2 T x QDs@MMWCNTs composite was rich in functional groups and exhibited homogeneous nanotube nanostructure by coupling with good electrochemical activity. Of note, the MoS 2 QDs@Ti 3 C 2 T x QDs@MWCNTs composite exhibited outstanding bifunctional electrocatalytic performances for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) in alkaline solution by combining the superior electrocatalytic activity of MoS 2 QDs and Ti 3 C 2 T x QDs and the excellent electrochemical performance of MWCNTs. The MoS 2 QDs@Ti 3 C 2 T x QDs@MMWCNTs catalyst exhibited a superior ORR activity to other non-Pt catalysts, giving a low Tafel slope (90 mV dec −1 ) and high half potential ( E 1/2 , 0.75 V), which was close to those of the commercial Pt/C (20%) catalyst (Tafel slope of 89 mV dec −1 , E 1/2 of 0.80 V). Additionally, the MoS 2 QDs@Ti 3 C 2 T x QDs@MMWCNTs also possessed good electro–oxidation performance for methanol in alkaline solution, giving a maximum methanol oxidation current density at 2.2 V of 160 A·g −1 . The results indicated that the combination of MoS 2 and Ti 3 C 2 T x QDs with MWCNTs can supply a potential for fabricating the bifunctional electrocatalysts for ORR and MOR.
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高影响因子
ELECTROCHIMICA ACTA
·
2017
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IF 4.798
Bo Tang,Yuhui Lin,Zipeng Xing,Yaqiang Duan,Siyu Pan,Ying Dai,Jia Yu,Jinlong Zou
The problems of poor electrocatalytic activity and CO tolerance and high Pt-loading of the Pt-based catalysts are still needed to be solved for direct methanol fuel cells. In this study, porous MoS 2 /nitrogen-doped carbon (MoS 2 /CN X ) as Pt supports/co-catalyst for methanol oxidation reaction (MOR) is successfully prepared by using waste bagasse as carbon source. Various material characterization techniques and electrochemical tests are performed to investigate the relationship between structural characteristics and MOR activity. The highly porous structure of CN X can provide abundant binding sites for growing well-dispersed MoS 2 with coral-reef structure, which should facilitate the exposure of MoS 2 edge to improve co-catalytic activity of MoS 2 /CN X . Pt/MoS 2 /CN X displays a higher mass activity (1030.2 mA mg pt −1 ) than those of Pt/MoS 2 /C (710.1 mA mg pt −1 ) and commercial Pt/C (405.4 mA mg pt −1 ), owing to that MoS 2 /CN X can afford abundant attachment sites to anchor Pt to enlarge the available electrochemically active area (111.2 m 2 g −1 pt ) for MOR. With the introduction of porous CN X , more active sites on MoS 2 edges are exposed out to dissociate water molecule for eliminating adsorbed CO-species on the active sites of Pt, which is conductive to enhance the durability and CO tolerance of Pt/MoS 2 /CN X . Furthermore, MoS 2 /CN X with high specific surface area (451.38 m 2 g −1 ) can offer sufficient oxygen-containing functional groups to facilitate the oxidation of intermediates (CO-species) on the active Pt sites, which can also promote the accessibility of methanol to the electroactive surface. These results provide a promising strategy for the design of highly active Pt support/co-catalyst to minimize Pt usage.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Tao Huang,LuLu Zhou,Shuwen Zhang,Yuyang Qin,Zhengfeng Hu
In the face of escalating arsenic pollution and the mounting challenge of municipal solid waste incineration (MSWI) fly ashes, cutting-edge technology has emerged as a game-changer. By harnessing the power of MoS 2 nanosheets, a revolutionary approach to double-self-cementation has been unlocked, addressing the limitations of previous methods. Through heterogeneous adsorption, MoS 2 nanosheets bolstered the stability of the matrix, leading to a remarkable surge in compressive strengths and a substantial reduction in leaching toxicities of heavy metals. The compressive strengths of the cemented cubes increased as the dosage of nanosheets increased from 0.3 % to 2.4 %, with compressive strengths ranging from 24.34 to 34.21 MPa. The leaching toxicities of Zn, Cu, Cr, Cd, Pb, and As from the solidified matrix correspondingly decreased to 0.32, 0.21, 0.04, 0.01, 0.05, and 0.53 mg/L, respectively. The role played by nanosheets in inhibiting the release and transport of chloride species further underscored their pivotal contribution. Moreover, the study delved into the intricate mechanisms underlying the impact caused by nanoscale materials cementation and geopolymerization systems, shedding light on their dual function as solidification intensifiers and chemical stabilizers. The nanosheet-enhanced double-self process can be appropriately fitted by the JMAK model. The linear nuclei growth of gels controlled the solidification and geopolymerization of the precursor materials and the stabilization of HM contaminants. This groundbreaking research not only elucidates the transformative potential of MoS 2 nanosheets but also paves the way for a paradigm shift in the treatment of contaminated soils and waste materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Shirong Qin,Kai Li,Jiaqi Zhu,Hanlun Xu,Nasir Ali,Arash Rahimi-Iman,Huizhen Wu
Owing to their extraordinary optoelectronic properties, 2D transition metal dichalcogenides (TMDs) are proved to be promising materials for photodetectors . However, they suffered from poor absorptivity due to their atomically thin profile. Herein, CuInS 2 quantum dots (QDs) and plasmonic Au nanoparticles (AuNPs) were adopted to achieve a MoS 2 -CuInS 2 -AuNPs 2D–0D hybrid by simultaneous deposition of CuInS 2 QDs and AuNPs on the MoS 2 nanosheet . In this configuration, MoS 2 is used as a high mobility carrier transport channel, while CuInS 2 QDs act as an efficient light absorber, and the AuNPs serve as a light sensitizer to enhance the local electric field around MoS 2 and CuInS 2 QDs via surface plasmon resonance (SPR). With such synergism of CuInS 2 QDs and Au NPs, the highest responsivity of 16.65 A W − 1 and D * as high as 2.27 × 10 12 Jones are achieved for the MoS 2 -CuInS 2 -AuNPs hybrid devices under 635 nm laser, which is two orders of magnitude higher than the pristine MoS 2 devices and outperformed most of the other MoS 2 -based photodetectors . Finally, the synergistic effect of the CuInS 2 QDs and Au nanoparticles is illustrated by Finite-Difference Time-domain(FDTD) simulation. The underlying synergism strategy for such a 2D–0D configuration may also be applied to other photo-electric devices.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Hanqin Gong,Feng Zheng,Jiahe Xu,Chencen Sun,Liangchao Gao,Pengfei Hu,Yang Li,Yu Gong,Qiang Zhen,Sajid Bashir
We first report a composite of molybdenum disulfide (MoS 2 ) nanoflake arrays (MNFs) and tungsten trioxide (WO 3 ) nanorod arrays (WNRs) directly grown on a copper (Cu) substrate. This composite is characterized in detail by scanning and transmission electron microscopes (SEM/TEM), X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). All of the evidences indicate that the obtained composite is a heterojunction. The supercapacitive properties of MNFs-WNRs composite heterojunction are measured systematically by using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The heterojunction exhibits a high specific capacitance of 522 F g −1 at 0.5 A g −1 , a high capacitance retention (95%) after 5000 cycles and a low charge transfer resistance (1.0 Ω). And this kind of heterojunction has advantages of both MoS 2 and WO 3 , which can be a better candidate for supercapacitive electrode material .
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 1
·1-11
·
IF 5.833
Lv Yuanxia,Qin Xiaohuan,Hu Kun,Huang Yong,Zhao Shulin
A novel matrix-assisted laser desorption/ionization time-of-flight mass spectrometric method (MALDI-TOF MS) for determination of highly sensitive small molecular compounds was developed based on molybdenum disulfide nanosheets hybridized with ultrathin graphitic carbon nitride (MoS 2 /g-C 3 N 4 ) as the matrix. With this approach, the synergistic effects of MoS 2 and g-C 3 N 4 enhance the UV absorption of MoS 2 /g-C 3 N 4 , increase both desorption and ionization efficiency in LDI MS, and induce higher signal-to-noise ratio of analytes when compared with the bare MoS 2 and g-C 3 N 4 matrix in the determination of amino acids, antibiotics, neutral oligosaccharides, uric acid, and polyethylene glycols (PEGs). The detection limits of these small molecular compounds are in the ranges 0.1 to 10 μg mL −1 , 1*10 −3 to 1.0 μg mL −1 , 1.0 to 10 μg mL −1 , and 2*10 −4 μg mL −1 , respectively, and the polydispersity index of these PEGs is less than 1.02. Moreover, high salt tolera`nce and homogeneous deposition on the spot results in good reproducibility. The relative standard deviations (RSDs) of shot-to-shot and spot-to-spot ( n = 15) of these compounds are less than 10.1% and 12.5%, respectively. With MoS 2 /g-C 3 N 4 , the uric acid in complicated biological samples can be directly determined in combination with LDI-TOF MS. Graphical abstract
We synthesized MoS 2 /g-C 3 N 4 nanohybrid as an efficient matrix for MALDI-TOF MS analysis of small molecules as well as quantitative detection of uric acid in human urine.
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-10
·
IF 5.479
Zhao Yanan,Zhou Juan,Jia Zimu,Huo Danqun,Liu Qingyan,Zhong Dengqin,Hu Yu,Yang Mei,Bian Minghong,Hou Changjun
A glassy carbon electrode was modified with a 3D-networked nanostructure composed of MoS 2 , reduced graphene oxide and gold nanoparticles (3D-MoS 2 /rGO/Au). The composites were prepared through in-situ growth of gold nanoparticles on 3D-MoS 2 /rGO nanosheets via a hydrothermal method. The morphology and electrochemical features of the composite were investigated. The 3D-MoS 2 /rGO/Au sensor exhibits excellent electrocatalytic activity for simultaneous detection of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The oxidation potentials are well separated at around −0.05 V for AA, 0.06 V for DA and 0.2 V for UA, respectively. The detection limits for individual detection and simultaneous detection (S/ N = 3) are 0.93 μM and 1.46 μM for AA, 0.11 μM and 0.15 μM for DA, and 0.74 μM and 0.29 μM for UA. The method was applied to the quantitative analysis of AA, DA, and UA in spiked serum samples with satisfying results.
In-situ growth of gold nanoparticles on 3D-networked MoS 2 /rGO nanocomposite for individual and simultaneous determination of ascorbic acid, dopamine and uric acid.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Qiang Huang,Jiao Zhao,Meiying Liu,Yan Li,Jiayuan Ruan,Qing Li,Jianwen Tian,Xiaoli Zhu,Xiaoyong Zhang,Yen Wei
In present work, novel polyacrylamide immobilized molybdenum disulfide (MoS 2 @ [email protected] ) composites were synthesized via the mussel-inspired chemistry and surface initiated atom transfer radical polymerization (SI-ATRP). The as-prepared MoS 2 @ [email protected] composites were characterized by energy dispersive X-ray spectroscopy (EDX), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). Characterization results provide sufficient evidences for the successful functionalization of MoS 2 with PAM. The products were used as adsorbents for removing of copper (II) ions. Results show the introduction of PAM onto MoS 2 could enhance the adsorption capacity of MoS 2 @ [email protected] towards copper (II) ions. The amount of adsorbed copper (II) ions by MoS 2 @ [email protected] composites is 2.5 times that of pristine MoS 2 . The effects of various experimental factors on the adsorption process, including contact time, initial copper (II) ion concentrations, solution pH and temperature, were also studied in this work. The batch experiments show that the adsorption of copper (II) ions onto MoS 2 @ [email protected] is dependent on time, pH and temperature. The optimum solution pH is observed at pH 7 and the increase of temperature is favorable for the adsorption of MoS 2 @ [email protected] towards copper (II). Based on the experiment data, the adsorption kinetics, isotherms and thermodynamics were also investigated. The kinetics and isotherm studies show that pseudo-second-order kinetic and Freundlich isotherm models could well fit with the adsorption data. The thermodynamic results show that the adsorption of copper (II) ions on MoS 2 @ [email protected] is a spontaneous and endothermic process. The adsorption process is mainly governed by the chemisorption involving the electrostatic interaction and/or chemical chelation between copper (II) ions and amino groups on the surface of MoS 2 @ [email protected] Taken together, it is proven that the PAM can be immobilized onto the MoS 2 nanosheets via the mussel-inspired chemistry and SI-ATRP, and it can enhance the adsorption performance of MoS 2 @ [email protected] composites, which might be used as adsorbents to remove heavy metal ions in real environment treatment.
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高影响因子
危险品化学品经营许可证（带存储）