Energy Material Advances
·
2023
·
IF 12.9
Jiao Xiang,Yuanduo Qu,Yanxin Zeng,Senyu Hu,Huiling Xu,Hong Xia,Muwei Ji,Lianfeng Duan,Fushen Lu
Lithium–sulfur batteries are considered important devices for the power of movable equipment, but there are still some challenges that limit their applications, such as how to obtain a cathode for high sulfide adsorption and rapid conversion. Here, a new strategy is proposed to enhance the performance of lithium–sulfur batteries by growing 3-dimensional hydrogen-substituted graphdiyne (HsGDY) layers on Ni foam via Glaser cross-coupling reaction to anchor MoS2/Ni3S2, enhancing the conductivity of host material of S. The results show that the 3-dimensional HsGDY framework enables the fast adsorption of lithium polysulfides and the Ni3S2/MoS2 performs as the reaction center with a low charge transfer resistance. The charge capacity of Ni@HsGDY/MoS2/Ni3S2 cell is up to 1,234.7 mAh·g−1 at the first circle, and the specific capacity keeps 486 mAh·g−1 after 500 cycles at a current density of 2 C. The incorporation of HsGDY into the cathode promotes the adsorption and the conversion of polysulfides, paving a path to obtain lithium–sulfur batteries with high energy density.
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INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2023
·Vol. 75
·期 2
·246-254
·
IF 1.6
Zhixiang Li,Shuo Han,Lei Wang,Kunhong Hu
Purpose This study aims to investigate the catalytic performance and tribological properties of MoS 2 powder. Design/methodology/approach In this work, the authors attempted to use MoS 2 nanoparticles (nano-MoS 2 ) as a catalyst to synthesize trimethylolpropane oleate (TMPTO) by esterification of trimethylolpropane and oleic acid. The small amount of highly dispersed nano-MoS 2 catalyst remaining in TMPTO needed not to be separated and could be used as a lubricant modifier directly to achieve the purpose of improving the lubricity performance of TMPTO. Findings The results demonstrated that nano-MoS 2 had good catalytic esterification ability and achieved in situ dispersion of about 0.191% nano-MoS 2 in TMPTO while catalyzing the synthesis of base oil. After high-speed centrifugal sedimentation treatment, the product TMPTO still retained about 0.008% of nano-MoS 2 . The above-synthesized TMPTO has significantly better lubricity performance than commercially available TMPTO, in which the friction coefficient and wear rate could be reduced by 75%. Originality/value The results of this study provide an idea for the design of catalysts for ester oil synthesis.
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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.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hao Wu,Zengsheng Guo,Ming Li,Guanghui Hu,Tao Tang,Jianfeng Wen,Xinyu Li,Haifu Huang
In this work, we report a strategy for enhancing the pseudocapacitive performance of MoS 2 materials by the introduction of nitrogen-doped graphene quantum dots (N-GQDs) and helical carbon tubes (HCNT). By a simple hydrothermal process, the hybrid composite (MoS 2 , N-GQDs and HCNT) were coated on the carbon cloth (CC) without any binders, which can be directly used as advanced electrode material for high-performance solid-state flexible supercapacitors . In this hybrid structure, N-GQDs are inserted between the layers of MoS 2 nanosheets , which induce and expose more active sites for pseudocapacitance contributions in MoS 2 electrode materials. Meanwhile, HCNT acts as electrically conducting bridge for enhancing the electrical conductivity of MoS 2 nanosheets and speeding up transport of electronic. As results, the hybrid composite (MoS 2 , N-GQDs and HCNT) show higher capacitive performance than pure MoS 2 . The specific capacitance of hybrid composite is high up to 3360 mF cm −2 . Further, the assembled solid-state flexible supercapacitor shows high specific capacitance of 1893 mF cm −2 , outstanding cycle life (capacitance retention of 86% after 2500 cycles), good mechanical stability and great flexibility. Our work provides a reference for the preparation of MoS 2 composites with high supercapacitive performance.
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ACS Applied Electronic Materials
·
2024
·
IF 4.3
Lei Wang,Xiaohong Ji,Qinyuan Zhang
The 1530 nm emission of the Er intra-4f transition (4I13/2 → 4I15/2) is essential for telecom communication because it corresponds to the minimum-loss window of silica optical fibers. Herein, we develop a metal–semiconductor–metal structured light source based on O–Er co-doped MoS2. The electroluminescence device exhibits the 1530 nm emission at low drive voltages (<5 V), which is beneficial from the impact excitation with the space–charge-limited conduction mechanism. The characteristic of symmetric structure allows the devices to exhibit consistent electrical and electroluminescence performance at positive and negative voltages. The O doping contributes to such high-current electrical behavior, and the Er doping leads to increased trap-filled-limited voltage due to increased trap density. This work lays the foundation for developing near-infrared light sources constructed with two-dimensional materials.
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Desalination and Water Treatment
·
2024
·
IF 1
Zijun Zhong,Ruopeng Xu,Huijuan He,Qiuna Zhuang,Langhuan Huang
ABSTRACT A novel g-C 3 N 4 /MoS 2 heterojunction photocatalyst with high efficient visible-light-region was fabricated by a facile calcination method. The composite with various weight ratios of g-C 3 N 4 and MoS 2 was synthesized and characterized. The results showed that MoS 2 was uniformly distributed on the surface of g-C 3 N 4 , resulting in the formation of heterostructure. The photocatalyst showed excellent photocatalytic activity in the photodegradation of organic pollutants. The optimized g-C 3 N 4 /MoS 2 sample (10-CNM) exhibited 94% (Methylene Blue) degradation efficiency after being irradiated for 2 h under visible light. At last, the possible mechanism of the enhanced photocatalytic activity was discussed.
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Journal of Central South University
·
2023
·Vol. 30
·期 10
·3187-3196
·
IF 4.4
Li Cheng,Xin Rui-feng,Jiao Chen-yin,Zhang Ze-juan,Qin Jia-ze,Chu Wen-long,Zhou Xi-long,Li Zi-an,Wang Zeng-hui,Xia Juan,Zhou Yu
Twisted bilayer transition metal dichalcogenides including MoS 2 have attracted great interest due to their unique Moiré superlattice induced electronic flat bands. High-quality twisted bilayer TMDs with uniform Moiré potentials are essential for the discovery of strong correlation effects, unconventional superconductivity, and quantum anomalous Hall effect. However, the synthesis of large-area high-quality twisted bilayer MoS 2 (tBMoS 2 ) using chemical vapor deposition (CVD) is still absent, which needs to overcome the formation energy barrier for nonstable twist bilayers. Here, we demonstrate a novel CVD approach with local airflow perturbation for growing tBMoS 2 by a heterosite nucleation strategy, which enables the nucleation of the second layer at the different site from the first layer nucleation site with arbitrary twist angles. Furthermore, the accurate determination of interlayer twist angles in tBMoS 2 is crucial for studying structure-physical properties relationship. We quantitatively compare the measurement accuracy between a geometrical method and TEM selected area electron diffractions (SAED), in which the measured angles from TEM-SAED shows much smaller angle errors. Finally, Raman spectra show the interlayer coupling can be tuned by the twist angles. Our study opens an avenue for the controllable growth of tBMoS 2 for both fundamental research and practical applications.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Ming Li,Qingyan Zhang,Haoran Ruan,Xiandong Wang,Yongping Liu,Zhenhuan Lu,Jiefeng Hai
The advantage of 2D-2D heterojunction over 2D-0D and 2D-1D heterojunction is that it has larger interface area, which results in the shorter migration distance of photo-induced charge carriers, and can therefore separate the electron-hole pairs more effectively. In this work, to form 2D-2D heterojunction , PbS nanosheets were grown in situ on 2D MoS 2 layers via. solvothermal process. The formation of 2D MoS 2 -2D PbS composites has been confirmed by XRD , Raman, TEM , and EDS analysis . The area of PbS nanosheets attached on MoS 2 can be controlled by changing the concentration of PbS precursor in reaction solution. Compared with pristine MoS 2 , MoS 2 -PbS composites showed improved light absorption property and enhanced photocatalytic ability using methylene blue as the target of degradation. The optimized composite displayed a photocurrent 5 times higher than that of pristine MoS 2 .
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Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 9
·2092-2099
·
IF 5.106
Jinxue Guo,Ke Zhang,Yanfang Sun,Yingxia Zong,Ziyang Guo,Qingyun Liu,Xiao Zhang,Yongyao Xia
Layered MoS2 has been recognized as a promising low-cost alternative to Pt-based electrocatalysts towards the hydrogen evolution reaction (HER). Intensive interest has been mainly focused on designing MoS2 nanostructures with large amounts of active edge sites and fast charge transfer. Here we report the synthesis of vanadium and nitrogen co-doped MoS2 on reduced graphene oxide with new defect sites on the basal/edge planes and expanded interlayer spacing, which shows remarkable catalytic merits with an extremely low overpotential of 68 mV at 10 mA cm−2 and a Tafel slope of 41 mV dec−1. Its performance is superior to most current MoS2 electrocatalysts. In addition to the charge transfer benefits of the RGO substrate, the vanadium and nitrogen dopants trigger defect sites on the basal/edge planes, and an optimized electronic structure and expanded interlayer distance are also responsible for the enhancement in catalysis. This contribution may offer a potential way to design advanced MoS2 catalysts by modulating the defect sites and interlayer distance for efficient electrochemical water splitting.
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CHINESE CHEMICAL LETTERS
·
2018
·
IF 2.631
Feng Chen,Long Wu,Zeping Zhou,Jiajun Ju,Zhengping Zhao,Mingqiang Zhong,Tairong Kuang
Lignin is the most abundant and important macromolecule in organic matter and its yield is second only to cellulose. Lignin is abundant in source, low in price, and has a large number of active groups such as methoxy group and carboxyl group, so it has great utilization value. We used lignin as a carbon source to prepare porous carbon nanosphere (PCN) materials, and in-situ synthesized the MoS 2 on its surface. The high specific surface area (∼462.8 m 2 /g), large pore volume and good electron conductivity of the porous carbon scaffold facilitated the reversible electro-chemical reaction of S towards metallic Li, and thus the nano-hybrid showed a high specific energy and excellent cycle stability which still remained 520 mAh/g after 50 cycles.
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Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Yuhui Sun,Junnan Han,Min Wang,Zhihuan Li,Zijie Lin,Shimin Chen,Zehui Zhang,Shijie Yang,Linwei Yu,Zhongwei Yu,Guangbin Zhang,Wei Li,Songke Mao,Hucheng Song,Jun Xu,Kunji Chen
The global energy crisis and unsustainable reliance on fossil fuels make it particularly urgent to develop efficient renewable energy storage solutions. Aqueous zinc–air batteries (ZABs) have become extremely promising candidates due to their low cost, abundant surface resources, inherent safety, and high theoretical energy density. This study explores the feasibility of using seawater as an electrolyte for ZABs, with the aim to reduce costs and alleviate competition for limited freshwater resources. Research results indicate that ZABs using seawater electrolytes with varying salinities (1.4–10%) show good bifunctional catalytic performance in the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) with defect-driven Co3O4–MoS2 bifunctional catalysts, while maintaining strong catalytic activity and stability in nonextreme salinity environments. The assembled ZABs with defect-driven Co3O4–MoS2 bifunctional catalysts display a charge–discharge voltage difference of less than 1.1 V, can stably operate for more than 360 cycles at a current density of 5 mA/cm2, and exhibit strong tolerance to halogen ions, with performance comparable to that of batteries using conventional deionized water-based electrolytes. These findings underscore the feasibility of seawater-based ZABs, breaking through the limitations of traditional deionized water-based electrolytes and expanding the application prospects of aqueous ZABs in the realm of sustainable energy storage.
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PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yongshan Ma,Qingxiang Guan,Huayun Zang,Fengxia Zhang,Tianyi Jiang,Xuemei Li,Yanyan Zhu
Solar-driven photocatalysis is a promising green technology for wastewater treatment. Molybdenum disulfide (MoS 2 ) is a highly efficient visible-light photocatalyst. However, due to the rapid recombination of photoinduced electron-hole (e - -h + ) pairs, its photocatalytic activity is severely limited, thereby hindering its practical application. To solve this problem, a novel MoS 2 -3,4,9,10-perylene tetracarboxylic acid (MoS 2 -PTCDG) heterojunction was synthesized via a hydrothermal method. In this composite, PTCDG nanosheets are embedded in the interlayer spaces of three-dimensional flower-like MoS 2 nanospheres, forming an organic–inorganic heterostructure. This design not only improves the separation efficiency of photogenerated e - -h + pairs, but also the hydrophilic terminal carboxyl groups on PTCDG can serve as adsorption sites for Cr(VI) pollutants. The MoS 2 -PTCDG composite demonstrates exceptional photocatalytic activity and stability in degrading Cr(VI) under simulated sunlight, achieving a reaction rate constant 2.5 times higher than that of pure MoS 2 . This study highlights the potential of rationally designed organic–inorganic heterostructures to overcome the limitations of traditional MoS 2 -based photocatalysts, thus offering new insights into the development of high-performance photocatalytic materials for environmental remediation.
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