JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Junhong Lu,Yinjuan Chen,Yanlin Zhang,Jie Huang,Haoyang Jiang,Dafang He,Haiqun Chen
Due to the presence of polysulfide shuttling, serious electrode expansion, and the low electrical conductivity of sulfur materials at room temperature, the commercialization of Li-S batteries is still not feasible. In this study, we have synthesized unique hollow molybdenum disulfide nanocages/reduced graphene oxide (H-MoS 2 /rGO) composites to be employed as highly effective cathodes for Li-S batteries. In this well-designed structure, the hollow MoS 2 nanocages are tightly bound by C-O-Mo bonds and uniformly distributed across the graphene sheets. The dual-function MoS 2 nanocages can adsorb polysulfides by Mo-S bond and accelerate the conversion reaction of S 8 and Li 2 S. Moreover, the 3D rGO network with abundant pores effectively reduces the diffusion path and enhances the rapid transport of electrons and ions. The hybrid H-MoS 2 /rGO cathodes with these advantages exhibit a remarkable initial discharge capacity of 801.7 mAh g -1 at 1 C, as well as a high specific discharge capacity of 533.2 mAh g -1 is remained over 500 cycles.
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International Journal of Electrochemical Science
·
2024
·
IF 1.3
Peng Zhang,Xin Meng,Xiaomin Luo,Jian Wang,Jianyan Feng,Yun Ma,Ka Li,Ying Liu,Lufeng Ji
Herein, we innovatively crafted a novel CNT/MoS 2 /FeCo-LDH cathode membrane using a facile vacuum filtration method. Benefiting from the unique heterostructure between FeCo-LDH and MoS 2 , the prepared CNT/MoS 2 /FeCo-LDH cathode membranes catalyzed the production of high-concentration H 2 O 2 (7.59 mg/L) at a low current density of 1.50 mA/cm 2 . The peak degradation efficiency of phenol (98.80 %) was reached in only 60 min. Under optimized operating conditions, the phenol removal rate of the CNT/MoS 2 /FeCo-LDH cathode membrane remained above 80.00 % within a wide pH range (3.0–9.0), demonstrating excellent adaptability. The synergistic incorporation of Mo, Fe, and Co ions facilitated additional chemical reaction pathways for Fenton-like reactions, thereby significantly enhancing hydrogen peroxide production. Notably, our approach exhibited moderate total organic carbon degradation efficiency, even for the actual pretreatment of coking wastewater, presenting a promising strategy for addressing recalcitrant industrial wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Zhuannian Liu,Benlong Wei,Kai Liu,Liping Wang
Molybdenum disulfide (MoS 2 ), as an appealing Faradaic material for efficient capacitive deionization (CDI), is limited by unsatisfactory electrical conductivity, inferior removal rate, and restacking. Herein, we develop a CNT/PPy/MoS 2 ternary composite using a robust 3D conductive interconnected structure CNT/PPy, constructed from multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) doped with dodecyl benzene sulfonate (DBS - ), as the growing substrate to mitigate the aggregation of MoS 2 nanoflakes. In this design, CNT/PPy ameliorates the wettability of the composite, provides convenient movement pathways, a fast charge transport rate, and facilitates ions diffusion process. Moreover, reinforced dispersibility and enlarged interlayer spacing of MoS 2 nanoflakes supply sufficient embedded sites for ion uptake and rapid transfer. Meanwhile, tight chemical coupling of Mo-N-C bonds can maintain the structural integrity of the composite electrode. Particularly, the symmetrical electrode configuration was established to address the kinetical unbalance of HCDI system. Consequently, the CNT/PPy/MoS 2 displays a large specific capacitance of 160.83 F g −1 at 5 mV s −1 , which is nearly 4.33 times that of MoS 2 (37.17 F g −1 ). The optimized CNT/PPy/MoS 2 cell achieves a maximum desalination capacity of 24.8 mg g −1 , ultra-high deionization rate of 5.24 mg g −1 min −1 , and superior capacity retention rate of 92.7% over 25 cycles. In addition, Na + ions were captured by the joint action of cation-exchange of DBS - -doped PPy, electrostatic adsorption of CNTs, and intercalation reaction of MoS 2 . The proposed composite structural design and electrode configuration should be a potential avenue to realize highly efficient deionization.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 16
·12297-12305
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IF 2.019
Hou Baoting,Wang Xinlu,Yao Jing,Zhang Hongbo,Yu Wensheng,Liu Guixia,Dong Xiangting,Wang Limin,Wang Jinxian
A simple and novel method based on recrystallization-sulfurization method has been developed to fabricate Ce 2 S 3 /MoS 2 composite and their structure, morphology and electrochemical performance is researched systematically. The Ce 2 S 3 /MoS 2 composite exhibit enhanced electrochemical performance compared with Ce 2 S 3 and MoS 2 . Among them, Ce 2 S 3 /MoS 2 composite has an initial reversible discharge capacity of 187.5 mAh g −1 , coulombic efficiency of 78.6% and a reversible capacity as high as 636.5 mAh g −1 , coulombic efficiency of 99.7% after 500 cycles at a current density of 100 mA g −1 and the highest discharge capacity of 97.3 mAh g −1 at a high current density of 1000 mA g −1 , showing the best reversible capacity and cycling performance. The results show that the compositing between MoS 2 and Ce 2 S 3 can maintain the stability of the structure during the charge/discharge process and existence of Ce 2 S 3 can enhance the electrical conductivity of Ce 2 S 3 /MoS 2 composite and further improves the reversible capacities, cycling performance and rate performance of Ce 2 S 3 /MoS 2 composite.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Qianfeng Li,Jian Sun,Xiang Li,Changling Yan,Gongke Wang
Silver ion (Ag + ) is a significant metal pollutant known for its potential toxicity to aquatic life and human health. Long-term exposure to toxic heavy metals will do great harm to humans and animals. Therefore, it is urgent to develop an efficient method for detecting Ag + . Herein, we have developed a simple, sensitive, highly selective and cost-effective fluorescence “off-on” mode nanosensor based on environmentally friendly and biocompatible materials for sensitive detection of Ag + in aqueous environments. In this sensing strategy, Ag + can specifically interact with the cytosine-cytosine (C-C) mismatch in single-stranded DNA, where Ag + induces the folding of single-stranded DNA to form hairpin structures and stable metal-mediated cytosine-Ag + -cytosine (C-Ag + -C) base pairs via coordinate bonds. Massive changes to the molecular volume and fluorescence signal are brought about by the development of the C-Ag + -C complex. To reach our objective, CdTe quantum dots (CdTe QDs) with low toxicity and strong signal were prepared as fluorophores for detecting Ag + target. Using the inner filter effect (IFE) between hydrophilic CdTe QDs and MoS 2 nanosheets to achieve the fluorescence quenching of the CdTe QDs, and the subsequent fluorescence turn-on process is due to the formation of C-Ag + -C complex, which makes its probe fluorophore far away from the surface of MoS 2 nanosheets, thus realizing fluorescence “off-on” sensing strategy. The proposed nanosensor can distinguish Ag + from other interfering ions with high sensitivity and selectivity. The nanosensor proposed here possesses a quick response time of 8 min and an ultra-low detection limit of 1.1 nM.
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Journal of Materials Research and Technology-JMR&T
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2024
·
IF 6.2
Xiaofeng Cai,Shuangjian Li,Wei Zeng,Ke Huang,Li Zhao,Dahai Zeng,Xiaohui Tu
The poor dispersion stability and susceptibility to oxidation significantly restrict the practical application of MoS 2 as a lubricant additive. Here, MoS 2 nanocomposite powders with magnesium silicate hydroxide (MSH) reinforcement and amorphous carbon protection were prepared via a straightforward two-step procedure. Detailed studies of the structure, phase composition, tribological properties, and lubrication mechanism of the composite powder have been conducted. The results demonstrated that the morphology of the composite powders was rod-shaped MSH coated with amorphous carbon and layered MoS 2 . The introduction of amorphous carbon into the MSH/MoS 2 composite powders results in enhanced dispersion and a reduction in corrosion to copper sheets. Furthermore, the addition of 1.0 wt% MSH/MoS 2 /C nanoparticles to PAO-6 led to a decrease in the COF of the lubricating oil from 0.104 to 0.063. Meanwhile, the wear rate of the friction pair decreased from 5.91 × 10 −7 mm 3 N −1 m −1 to 2.22 × 10 −7 mm 3 N −1 m −1 . The excellent performance could be attributed to the introduction of amorphous carbon effectively prevents the oxidation of MoS 2 within the additive, leading to improved friction and wear resistance. The tribo-film, composed of MSH, Fe 2 O 3 , FeS, MoS 2 , graphite, and amorphous carbon, demonstrates remarkable capabilities in reducing friction and wear.
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Advanced Science
·
2024
·
IF 14.3
Tianming Wang,Lejuan Cai,Caijuan Xia,Han Song,Lianbi Li,Gongxun Bai,Nianqing Fu,Lede Xian,Rong Yang,Haoran Mu,Guangyu Zhang,Shenghuang Lin
Quantum dot sensitized solar cells (QDSCs) represent a promising third-generation photovoltaic technology, boasting a high theoretical efficiency of 44% and cost efficiency. However, their practical efficiency is constrained by reduced photovoltage ( V oc ) and fill factor (FF). One primary reason is the inefficient charge transfer and elevated recombination rates at the counter electrode (CE). In this work, a novel CE composed of a titanium mesh loaded with Co,N─C@MoS 2 is introduced for the assembly of QDSCs. The incorporation of nanosized MoS 2 enhances the density of catalytic sites, while the Co,N─C component ensures high conductivity and provides a substantial active surface area. Additionally, the titanium mesh's 3D structure serves as an effective electrical conduit, facilitating rapid electron transfer from the external circuit to the composite. These improvements in catalytic activity, charge transfer rate, and stability of the CE significantly enhance the photovoltaic performance of QDSCs. The optimized cells achieve a groundbreaking power conversion efficiency (PCE) of 16.39%, accompanied by a short-circuit current density ( J sc ) of 27.26 mA cm −2 , V oc of 0.818 V, and FF of 0.735. These results not only offer a new strategy for designing electrodes with high catalytic activity but also underscore the promising application of the Co,N─C@MoS 2 composite in enhancing QDSC technology.
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PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Siyu Cao,Li Wang,Yufei Shu,Meng Zhang,Mengxia Wang,Qi Han,Xun Liu,Zhongying Wang,How Yong Ng
Recent studies reveal the enhancement in water permeability for thin-film nanocomposite (TFN) membranes that incorporate an interlayer (TFNi), mainly when developed using substrates with larger pores. Nevertheless, the impact of substrate pore size on the membrane's morphology and separation performance requires further exploration. The study systematically investigates how the pore size of polycarbonate track-etched (PCTE) substrates influences these factors. Findings suggest that larger pores lead to rougher membrane surfaces and higher water permeance by reducing hydraulic transport resistance. However, optimal performance on larger pores requires a thicker MoS 2 interlayer, leading to a thinner polyamide layer. Specifically, on PCTE-200 substrates, the MoS 2 interlayer made up of large MoS 2 nanosheets creates a more tortuous path for water molecules, limiting permeance. Conversely, smaller pores than the MoS 2 nanosheets' dimensions obstruct the storage and diffusion of PIP monomers, negatively affecting the polyamide film and salt rejection. These findings underscore the significance of choosing the suitable substrate and adjusting interlayer thickness for creating TFN membranes with desired separation characteristics. The study provides valuable insights into the role of substrate selection and interlayer thickness in TFNi membrane design, offering guidelines for developing high-performance membranes for various separation tasks.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-9
·
IF 5.3
Xiang Jiawang,Zhang Bing,Yuan Yuan,Zhao Zhihuan,Lin Jianying,Li Jing
A novel signal amplification strategy was developed by combining near-infrared light with MoS 2 /CuO/Au nanocomposite for building a colorimetric immunoassay. First, MoS 2 /CuO/Au nanocomposite was synthesized by precipitation and photoreduction methods and characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). MoS 2 /CuO/Au nanocomposite has oxidase-like activity and can oxidize TMB to form a blue product (TMBox). Further, the catalytic oxidation of TMB was accelerated under near-infrared (NIR) laser radiation. The sandwich-type colorimetric immunoassay was constructed using MoS 2 /CuO/Au nanocomposite. Under the enhancement of near-infrared light, carcinoembryonic antigen (CEA) was sensitively detected in the range 0.1 to 40 ng/mL with the limit of detection of 0.03 ng/mL. Moreover, the immunosensor has excellent selectivity and anti-interference, good repeatability, and stability. Graphical Abstract
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yunqi Ning,Shan Wang,Hanbing Wang,Wei Quan,Daqi Lv,Shansheng Yu,Xiaoying Hu,Hongwei Tian
The development of low-cost and efficient metal sulfide photocatalysts through morphological and structural design is vital to the advancement of the hydrogen economy. However, metal sulfide semiconductor photocatalysts still suffer from low carrier separation and poor solar-to-hydrogen conversion efficiencies. Herein, two-dimensional ZnIn 2 S 4 nanosheets were grown on Zn 0.5 Cd 0.5 S hollow nanocages to construct Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 hollow nanocages for the first time. Novel hollow core–shell Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 nanocages with Z-scheme heterojunction structures were obtained by incorporating MoS 2 nanosheet co-catalyst via the solvothermal method. The resulting Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 exhibited unique structural and compositional advantages, leading to remarkable photocatalytic hydrogen evolution rates of up to 8.5 mmol·h −1 ·g −1 without the use of any precious metal co-catalysts. This rate was 10.6-fold and 7.1-fold higher compared to pure ZnIn 2 S 4 and Zn 0.5 Cd 0.5 S, respectively. Moreover, the optimized Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 photocatalyst outperformed numerous reported ZnIn 2 S 4 -based photocatalysts and some ZnIn 2 S 4 -based photocatalysts based on precious metal co-catalysts. The exceptional photocatalytic performance of Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 can be attributed to the Z-scheme heterojunction of core–shell structure that enhanced charge carrier separation and transport, as well as the co-catalytic action of MoS 2 . Overall, the proposed Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 with heterojunction structure is a promising candidate for the preparation of efficient photocatalysts for solar-to-hydrogen energy conversion.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Shaobo Ye,Zhentao Du,Zhengxiang Cai,Deliu Ou,Haonan Guo,Qiao Liu,Weiyou Yang,Qing Shi
Molybdenum disulfide (MoS2), a typical earth-abundant material, is an excellent candidate for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), which fundamentally rely on the regulation of the morphology and electronic structure of MoS2. Herein, Mn-doped amorphous MoS2 coated on Mn-doped crystalline Ni3S2 nanorods (Mn–Ni3S2@MoS2), rationally designed core–shell nanorods, have been fabricated via a facile one-step hydrothermal method as highly efficient bifunctional activities for HER and OER in alkaline solution. The target electrodes deliver a high current density of 100 mA cm–2 at a low overpotential of 187 and 310 mV for HER and OER, respectively, outperforming most MoS2-based catalysts. Moreover, a water-splitting cell based on the Mn–Ni3S2@MoS2 electrode requires a voltage of 1.45 V to reach a current density of 10 mA cm–2, which is superior to the state-of-the-art one of those based on noble metal Pt/C–NF∥RuO2–NF and non-noble metal catalysts. The overall enhanced bifunctional catalytic performance is mainly attributed to the abundant catalytically active sites provided by the Mn-doped amorphous MoS2 and the fast pathway for electron/proton transfer facilitated by the Mn-doped crystalline Ni3S2 nanorods. The incorporated Mn dopants and assembled Ni3S2/MoS2 heterostructure effectively regulate the electronic structure with redistributed charge within the core–shell Mn–Ni3S2@MoS2 electrode.
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Advanced Fiber Materials
·
2024
·Vol. 6
·期 4
·1074-1091
·
IF 17.2
Qiu Libin,Duan Lian,Lin Hongyu,Wang Min,Liang Huaping,Peng Guilong,Yang Xiao,Si Yang,Yi Shixiong
Developing novel antibacterial dressing protecting skin injuries from infection is essential for wound healing. In this study, sericin, a bio-waste produced during the degumming of silk cocoons, is utilized to exfoliate MoS 2 layers and improve the dispersity and stability of MoS 2 nanosheets (MoS 2 -NSs). Moreover, owing to its ability to promote oxygen permeability and cell growth and its good biocompatibility, MoS 2 -NS/Sericin maintains its photothermal property under an 808 nm light source for a strong antibacterial activity as well as improves the fibroblast migration, which accelerates wound healing. Furthermore, the in vitro experiments indicates that MoS 2 -NS/Sericin can also scavenge reactive oxygen species (ROS) at an inflammatory stage of wound healing and transform classical activated macrophages (M1-type) into alternatively activated macrophages (M2-type), which is beneficial for wound recovery. Based on these results observed in vitro, full-thickness skin wound experiments are conducted on rats, and the corresponding results show that MoS 2 /Sericin under 808 nm irradiation exhibits the best performance in promoting wound healing. Overall, MoS 2 -NS/Sericin exhibits a high potential for bacteria-infected wound healing. Graphical Abstract
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危险品化学品经营许可证（带存储）