Matter
·
2023
·
IF 18.9
Chao Gao,Ye Feng,Suyi Liu,Dongmei Fu,Bin Chen,Dailing Du,Wenjing Zhang,Zhan Gao,Haihong Yang,Daniela A. Wilson,Yingfeng Tu,Fei Peng
Summary A Cu@MoS 2 microtube-based micromotor with a unique composite structure in which MoS 2 was “wrapped” on the surface of Cu microtubes confers excellent photoresponsive properties due to the unique hybridized structure. Micromotor swarms demonstrate spontaneous oscillatory motion in pure water with constant light input, without any external field changes or energetic toxic fuels. This macroscopic periodic oscillatory motion synchronized with the cycle of increasing and decreasing protons (H + ) produced by the micromotor. The H + gradient is the core of cellular ATP (adenosine triphosphate) synthesis and decomposition. Oscillating proton signals released by the micromotor can be coupled to cardiomyocytes to achieve synchronized oscillations of cell membrane potential/calcium ions and to initiate ATP hydrolysis in cardiomyocytes. The oscillatory behavior was considered to be caused by the different conversion levels of bistable reactions or by non-linear kinetics and mass transport. Specifically, MoS 2 photocatalytic hydrogen production, MoS 2 hydrolysis reactions, dynamic diffusive matter exchange from electroosmotic flow, and interfacial effects contribute to this phenomenon.
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高影响因子
ACS Omega
·
2023
·
IF 4.1
Rui Bai,Yuan-Jia Cao,Cui-Ying Lu,Guang-Hui Liu
In this paper, with coal tar pitch as the carbon source, porous carbon (PC) was prepared by one-step carbonization. To improve the energy density of coal tar pitch-based porous carbon, MoS2@PC was prepared by a hydrothermal method on a PC substrate. The effect of MoS2 loading on the structure and electrochemical properties of the sample was studied. The results show that the specific surface area of the MoS2@PC-0.3 synthesized is 3053 m2 g–1, and the large specific surface area provides sufficient attachment sites for the storage of electrolyte ions. In the three-electrode system, the specific capacitance of MoS2@PC-0.3 at 0.5 A g–1 is 422.5 F g–1, and the magnification performance is 57.3% at 20 A g–1. After 10,000 charge/discharge cycles, the capacitance retention rate of the sample is 76.73%, with the Coulombic efficiency being 100%. In the two-electrode test system, the specific capacitance of MoS2@PC-0.3 at 0.5 A g–1 is 321.4 F g–1, with the power density and energy density being 500 W kg–1 and 44.6 Wh kg–1, respectively. At a current density of 20 A g–1, the capacitance retention rate is 87.69% after 10,000 cycles. This study greatly improves the energy density of PC as the electrode material of supercapacitors.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 5
·2760-2770
·
IF 11.9
Binchao Shi,Yue Wang,Ertai Liu,Shilin Mei,Chang-Jiang Yao
The fast capacity decay and limited cycling life are the two main issues that hinder the practical applications of lithium–sulfur batteries. They are mainly caused by the shuttle effect of polysulfide species and the growth of big lithium dendrites occurring separately on the cathode and anode sides. To simultaneously tackle these problems, we explore a multifunctional interlayer integrating the aligned nanochannel structure of an anodic aluminum oxide (AAO) membrane with porous 1T MoS2 nanotubes (namely MoS2@AAO). Benefiting from the high electronic conductivity, sulfiphilic and lithiophilic properties of 1T MoS2, and the positive surface plus low tortuosity of the straight channels of AAO, the designed interlayer not only guarantees rapid ion/electron transfer and efficacious suppression of the polysulfide shuttle, but also achieves uniform and stable lithium deposition during cycling. Consequently, the MoS2@AAO interlayer exhibits a high capacity retention of 99.6% at 0.2C after 500 cycles and 90.6% at 1.0C after 1000 cycles. The prototype cathode with a sulfur loading of 5 mg cm−2 was also investigated, which exhibited over 96% retention of the initial discharge capacity at 0.1C after 50 cycles. This work provides a new solution for simultaneously stabilizing both the lithium anode and sulfur cathode via an integrating approach.
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ACS Nano
·
2023
·
IF 17.1
Yuan-Ming Cao,Yang Su,Mi Zheng,Peng Luo,Yang-Biao Xue,Bin-Bin Han,Min Zheng,Zuoshan Wang,Liang-Sheng Liao,Ming-Peng Zhuo
Flexible moisture–electric generators (MEGs) capture chemical energy from atmospheric moisture for sustainable electricity, gaining attention in wearable electronics. However, challenges persist in the large-scale integration and miniaturization of MEGs for long-term, high-power output. Herein, a vertical heterogeneous phase-engineering MoS2 nanosheet structure based silk and cotton were rationally designed and successfully applied to construct wearable MEGs for moisture–energy conversion. The prepared METs exhibit ∼0.8 V open-circuit voltage, ∼0.27 mA/cm2 current density for >10 h, and >36.12 μW/cm2 peak output power density, 3 orders higher than current standards. And the large-scale device realizes a current output of 0.145 A. An internal phase gradient between the 2H semiconductor MoS2 in carbonized silks and 1T metallic MoS2 in cotton fibers enables a phase-engineering-based heterogeneous electric double layer functioning as an equivalent parallel circuit, leading to enhanced high-power output. Owing to their facile customization for seamless adaptation to the human body, we envision exciting possibilities for these wearable METs as integrated self-power sources, enabling real-time monitoring of physiological parameters in wearable electronics.
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SENSORS
·
2023
·Vol. 23
·期 17
·7449
·
IF 3.9
Jin Hu,Jiajia Dai,Caiping Huang,Xierong Zeng,Weiwei Wei,Zhezhe Wang,Peng Lin
An organic electrochemical transistor (OECT) with MoS2nanosheets modified on the gate electrode was proposed for glucose sensing. MoS2nanosheets, which had excellent electrocatalytic performance, a large specific surface area, and more active sites, were prepared by liquid phase ultrasonic exfoliation to modify the gate electrode of OECT, resulting in a large improvement in the sensitivity of the glucose sensor. The detection limit of the device modified with MoS2nanosheets is down to 100 nM, which is 1~2 orders of magnitude better than that of the device without nanomaterial modification. This result manifests not only a sensitive and selective method for the detection of glucose based on OECT but also an extended application of MoS2nanosheets for other biomolecule sensing with high sensitivity.Keywords:organic electrochemical transistor;MoS2nanosheets;liquid phase ultrasonic exfoliation;glucose sensor
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Fengfan Zhang,Wei Liang,Zhaoxia Dong,Qiqi Niu,Zihao Yang,Meiqin Lin,Juan Zhang
As an emerging technology for enhanced oil recovery that is highly efficient, cost-effective, and environmentally friendly, nanofluids have gained increasing attention. However, improving the dispersion stability of nanofluids to enhance oil displacement efficiency remains an open challenge. In this study, a variety of modified MoS 2 nanosheets were synthesized and their stability in brine and basic properties relevant to oil displacement were systematically investigated. The results demonstrated that both modification methods were effective to some extent. However, compared with physically adsorbed, chemically modified MoS 2 nanosheets by sulfur vacancies exhibited superior performance. It was reflected in their good stability in brine, low interfacial tension, and effective emulsifying ability. These advantageous properties enabled them to enhance oil recovery in a significant manner. This work revealed the basic properties of modified MoS 2 nanosheets , especially the dispersibility in brine. It was expected to design suitable chemical oil displacement agents for different reservoir conditions and provide guidance for practical application.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Lili Luo,Xiaohong Wang,Siyu Yang,Juguo Dai,Dongxu Li,Long Xia,Cheng Chi,Andreu Cabot,Yiting Xu,Lizong Dai
While asymmetric supercapacitors (ASCs) have huge potential as efficient, durable, and cost-effective energy storage devices, they fail to meet expectations because of the unoptimized architecture and composition of their electrode materials. Herein, PPy/PANI@MoS2 (PPMS) ternary composites with a dual-channel structure are obtained by facile hydrothermal and in situ polymerization methods. These dual conductive channels synergistically improve the electrode’s electrical conductivity, facilitate ion diffusion, enlarge the interlayer distance, and increase the accessible surface area. Taking advantage of such a favorable architecture, PPMS composites exhibit outstanding electrochemical properties, including a huge specific capacitance (1171 F g–1 at 1 A g–1) and rate capability (861 F g–1 at 20 A g–1) in three-electrode systems. Based on charge storage mechanism analyses, we demonstrate that the kinetic behavior of PPMS electrodes is dominated by the surface capacitance (95.9% at 100 mV s–1). Besides, PPMS-based ASCs (PPMS//activated carbon) operate in a broad voltage window (1.8 V), delivering an ultrahigh energy density of 93.4 Wh kg–1 at a power density of 884.8 W kg–1. They also show a superior cycling stability of 90.4% and a remarkable Coulombic efficiency of 99.2% for 10,000 cycles. This work affords an inspiration for rational structural optimization of PANI-based electrode materials with great prospects in the development of next-generation high energy density ASCs.
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Catalysts
·
2023
·Vol. 13
·期 7
·1030
·
IF 3.9
Siyi Jiang,Yujing Weng,Yangbin Ren,Shihang Meng,Xiaoman Li,Chao Huang,Yulong Zhang,Qi Sun
The chemical transformation of carbon dioxide (CO2) not only reduces the amount of carbon dioxide emitted into the Earth’s atmosphere by humans, but also produces carbon compounds that can be used as precursors for chemical and fuel production. Herein, a selective catalytic conversion of carbon dioxide to methanol is achieved by a bifunctional molybdenum disulfide catalyst (MoS2) with magnesium oxide and nickel and potassium promoters. Molybdenum disulfide prepared by the supercritical ethanol method has a large specific surface area and presents good catalytic performance with high methanol selectivity when loaded with potassium (K) and nickel (Ni) promoters. In addition, the catalysts were evaluated and it was founded that the addition of the K-promoter improved methanol selectivity. This research provides a new strategy for improved product selectivity and space–time yield (STY) of methanol in CO2hydrogenation.Keywords:CO2hydrogenation;molybdenum disulfide;methanol
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Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Jun Tao,Yanyan Liu,Yaru Li,Xiaoxiao Xie,Li Feng,Shuao Yang,Yuxue Shan
Background Sulfamethoxazole (SMX), as a widely used antibiotic, has been frequently detected in various environments. The accumulation of SMX in water has posed potential risk to the biology and human health. Advanced oxidation technology (AOPs) is an effective method to remove refractory organic pollutants, which has drawn great attention in recent years. Methods Magnetic MnFe 2 O 4 /MoS 2 nanocomposites were synthesized by a two-step hydrothermal method, and characterized with different physicochemical methods. The catalytic performance and mechanism of MnFe 2 O 4 /MoS 2 were studied by the degradation of SMX under peroxisate (PMS) condition. Significant findings The catalytic performance of MnFe 2 O 4 /MoS 2 nanocomposites was superior to that of individual MnFe 2 O 4 or MoS 2 due to the cyclic effect of Fe(II)/Fe(III) and Mn(II)/Mn(III) occurred in the interfaces of MnFe 2 O 4 /MoS 2 . The degradation efficiency of SMX reached 99.1% within 15 min at room temperature, and the catalytic system can maintain a high degradation efficiency in a wide pH range of 3.0 ∼ 9.0. EPR and radical burst experiments showed the main active species of the MnFe 2 O 4 /MoS 2 –3/PMS reaction system were SO 4 •- and • OH radicals. Furthermore, the catalyst exhibits superparamagnetic properties and good stability to enable its recycle and reuse.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 15
·6643-6655
·
IF 4.5
Zhang Hengchao,Li Yarou,Zhang Yupan,Wu Junfeng,Hu Jiandong,Li Shixin,Li Lanlan
Heavy metal pollution in the environment has posed a serious threat to human health and ecosystems. Therefore, it is urgent to develop a fast and effective sensing method for detecting heavy metal ions (HMIs). A simple and rapid ultrasonic mixing method was used to prepare nanocomposites consisting of cysteine, multi-walled carbon nanotubes, and nitrogen-doped molybdenum disulfide (L-Cys/MWCNTs/N-MoS 2 ). Fully combining the excellent features of 2D materials and carbon nanomaterials, the nanocomposites have been successfully used as sensor interface materials for the simultaneous detection of lead ions (Pb 2+ ) and cadmium ions (Cd 2+ ). The L-Cys/MWCNTs/N-MoS 2 @GCE sensor has a wide linear range for the detection of Pb 2+ and Cd 2+ , with the detection limits as low as 0.67 nM and 5.3 nM, respectively. In addition, the sensor performs well in stability, reproducibility, and anti-interference performance. The L-Cys/MWCNTs/N-MoS 2 @GCE sensor can also be used for the detection of Pb 2+ and Cd 2+ in tap water and lake water with good recovery (> 90%), which may provide a promising strategy for the simultaneous in situ and sensitive detection of heavy metal ions in the aqueous environment.
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Materials
·
2023
·Vol. 16
·期 6
·2277
·
IF 3.4
Si Xu,Shanshan Liang,Bing Wang,Jiali Wang,Meng Wang,Lingna Zheng,Hao Fang,Tingfeng Zhang,Yi Bi,Weiyue Feng
Pre-coating with a protein corona on the surface of nanomaterials (NMs) is an important strategy for reducing non-specific serum protein absorption while maintaining targeting specificity. Here, we present lipoic acid-terminated polyethylene glycol and transferrin bi-functionalized MoS2nanosheets ([email protected]2-PEG NSs) as a feasible approach to enhance cellular uptake.[email protected]2-PEG NSs can maintain good dispersion stability in cell culture medium and effectively protect MoS2NSs from oxidation in ambient aqueous conditions. Competitive adsorption experiments indicate that transferrin was more prone to bind MoS2NSs than bovine serum albumin (BSA). It is noteworthy that single HepG2 cell uptake of[email protected]2-PEG presented a heterogeneous distribution pattern, and the cellular uptake amount spanned a broader range (from 0.4 fg to 2.4 fg). Comparatively, the intracellular Mo masses in HepG2 cells treated with[email protected]2-PEG and MoS2-PEG showed narrower distribution, indicating homogeneous uptake in the single HepG2 cells. Over 5% of HepG2 cells presented uptake of the[email protected]2-PEG over 1.2 fg of Mo, about three-fold that of[email protected]2-PEG (0.4 fg of Mo). Overall, this work suggests that Tf coating enhances the cellular uptake of MoS2NSs and is a promising strategy for improving the intracellular uptake efficiency of cancer cells.Keywords:bi-functionalization;[email protected]2-PEG nanosheets;HepG2 cellular uptake
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Tariq Ali,Xianfu Wang,Kai Tang,Qun Li,Saman Sajjad,Shahid Khan,Sidra Anis Farooqi,Chenglin Yan
Electrocatalytic active sites along the Mo-terminated edge of molybdenum disulfide (MoS 2 ) are responsible for the promising hydrogen evolution reaction (HER) activity but poor electrical convey, and scarcity of active sites may inhibit its electrocatalytic performance. Therefore, enhancing the electronic conductivity and increasing the active sites in basal plane are required to realize more efficient hydrogen evolution activity for layered MoS 2 . Herein, by the incorporation of heterophase SnS 2 quantum dots into the basal plane to form atomic-level heterostructure, we dramatically report the enhanced HER activity from MoS 2 with current density of −10 mA cm −2 at a lowered overpotential of 240 mV, a reduced Tafel slope of 65 mV/dec and a long-term durability over 18 h operation. Structural characterization and electrochemical studies reveal the incorporation of heterophase SnS 2 quantum dots can efficaciously realize the disorder engineering in the atomic level to regulate the electronic structure, optimize the energy barrier of hydrogen adsorption/desorption, and proliferate the catalytic active sites density, thus activating the basal plane of MoS 2 for hydrogen evolution. Density functional theory (DFT) calculation reveals the inception of the improved electrocatalytic activity stemmed from an astronomically immense reduction of the kinetic energy barrier of hydrogen adsorption on and desorption from sulfur sites and sulfur vacancies in the basal plane upon SnS 2 incorporation and Sn doping. Our work engenders an efficient method to active the basal plane of 2H-MoS 2 by the incorporation of SnS 2 heterophase into the atomic layer inducing atomic dislocation and electronic structure optimization.
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危险品化学品经营许可证（带存储）