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Summary: A Z-scheme LaFeO3/MoS2/graphene photocatalyst was synthesized and tested for the degradation of dye wastewater. The photocatalyst showed high efficiency and stable performance, attributed to the synergistic effect between LaFeO3 and MoS2/graphene co-catalyst and the optimized Z-scheme heterojunction interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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Summary: Lithium-sulfur (Li-S) batteries are promising energy storage devices with high energy density, specific capacity, low cost, and environmental friendliness. However, the shuttle effect of polysulfides and the growth of lithium dendrites hinder their practical application. In this study, a modified separator with alpha-MnO2 supported on carbon nanotubes was prepared to address these issues. The modified separator effectively inhibits the shuttle effect of polysulfides, enhances electrochemical activity, and promotes ion and electron transfer. The alpha-MnO2 @CNT-based Li-S battery exhibits excellent cycling performance and high discharge capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Meina Liu et al.
Summary: In this paper, a simple and reliable hydrothermal synthesis strategy was used to prepare high-performance energy storage materials. Spherical MoS2 composite wheat straw cellulose carbon material (MoS2 @WSCC-S) and 3D nanoflower-like MoS2 grown on wheat straw cellulose carbon (MoS2 @WSCC-F) were successfully obtained through the addition of polyvinylpyrrolidone (PVP) and ammonium persulfate (APS) under acidic conditions. The presence of oxygen-containing groups and the pH of the solution play key roles in the formation of flower-like structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Fuling Li et al.
Summary: In this study, core-shell Co9S8 @MoS2 nanocubes anchored on reduced graphene oxide nanosheets were fabricated using a self-assembly method followed by pyrolysis, forming hierarchical heterostructures. The designed heterostructure exhibited excellent microwave absorption performance with low loading content.
JOURNAL OF ALLOYS AND COMPOUNDS
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Shuqi Li et al.
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JOURNAL OF ENVIRONMENTAL SCIENCES
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
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Pengfei Shen et al.
Summary: The catalytic activity of 2D materials has been studied and their unique structural and electronic properties contribute to their success in conventional heterogeneous catalysis. Piezocatalysis based on heterojunctions has attracted attention because of band-structure engineering and enhanced charge carrier separation. A reduced graphene oxide (rGO)-MoS2 heterostructure is designed to tackle challenges such as finite active sites, catalyst poisoning, and poor conductivity. The heterostructure exhibits a record-high piezocatalytic degradation rate, which is significantly higher than that of MoS2 nanosheets. The mechanism of this behavior opens up new possibilities for developing efficient catalysts for wastewater treatment and other applications.
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Yansong Ma et al.
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Chemistry, Physical
Shafaque Rahman et al.
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JOURNAL OF ALLOYS AND COMPOUNDS
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Ick-Joon Park et al.
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JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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Chemistry, Physical
Guofei Zhang et al.
Summary: Organic fuels have a significant impact on the morphology, pore structure, and catalytic active sites of metal oxides in solution combustion synthesis (SCS). A comparative study was conducted on the effects of five organic fuels on the thermocatalytic active sites of graded porous MgCo2O4 nanomaterials. Citric acid-fueled CA-MCO exhibited the largest specific surface area, richest pore structure, and the highest number of active sites. The porous CA-MCO demonstrated the best catalytic properties, leading to a decrease in the thermal decomposition temperature of ammonium perchlorate (AP) by 206.06 degrees C, a decrease in activation energy (Ea) by 104.58 kJ·mol-1, and an increase in reaction rate (k) by 2.49 s-1. Furthermore, CA-MCO was successfully applied in AP/HTPB-based composite solid propellants (CSPs), significantly reducing the ignition delay time from 29 ms to 8 ms.
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Jingfan Zhang et al.
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JOURNAL OF ALLOYS AND COMPOUNDS
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Pei Feng et al.
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VIRTUAL AND PHYSICAL PROTOTYPING
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Magdeline Tze Leng Lai et al.
Summary: The construction of a p-n heterojunction photocatalyst successfully overcomes the low photo-catalytic activity caused by rapid charge recombination and limited photo-response range. In this study, an interlayer of expanded MoS2 coupled with Bi2WO6 (BW-IEM) photocatalyst was synthesized, achieving a Methylene Blue (MB) removal rate of up to 97% (5.18 x10-2 min-1) under the irradiation of low power 1W LED white light. The outstanding photocatalytic performance of the p-n heterojunctions BW-IEM photocatalyst is attributed to the enhancement of light harvesting, improvement in the separation of charge carriers, and coexistence of oxygen vacancy. The main reactive oxygen species (ROS) responsible for the photo-degradation of MB were center dot Oz radicals and center dot OH. This work provides a new strategy for the potential IEM photocatalyst as a matrix in a p-n heterojunction composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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Chemistry, Physical
Yu Zeng et al.
Summary: A method for fabricating Ti3C2Tx MXene-MoS2 hybrid fillers/Methyl vinyl silicone rubber (MVQ) composites with high dielectric permittivity was reported. The composites exhibited uniformly distributed Ti3C2Tx MXene-MoS2 hybrid fillers, and the composite with 2.2 wt% hybrid fillers showed a high dielectric permittivity of 7.35 at 103 Hz. The composites also displayed excellent mechanical properties.
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Noor Tahir et al.
Summary: The present study investigates and compares the photocatalytic and antibacterial activity of in situ Manganese doped ternary nanocomposites. The Mn-doped Ag2WO4 coupled with MoS2-GO and Mn-doped MoS2 coupled with Ag2WO4-GO both show efficient plasmonic catalysts for wastewater treatment. The nanocomposites exhibit excellent sunlight harvesting ability for dye degradation and show good photocatalytic stability.
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Mengjiao Shi et al.
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Keding Li et al.
Summary: With the rapid development of nuclear energy, the pollution of uranium to water has become a major threat to human health. A study found that MXene/graphene oxide nanocomposite (MGN) can effectively remove uranium from water. MGN-2 showed excellent adsorption capacity and stability, making it a potential adsorbent for uranium removal.
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Beilin Zuo et al.
Summary: Si@NC/AP and Si@PVDF/CL-20 composites with different Si contents were fabricated by spray-drying technique. Their flame structure, ignition delay time, and combustion process were investigated. The results showed that the Si-based fuel with 40 wt% of Si had the shortest ignition delay time. The core-shell structured composites exhibited better combustion performance with lower burn rate and slightly lower pressure exponent, as well as more fluffy combustion products.
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Lu Liu et al.
Summary: The addition of Al-Mg alloys as fuel additives can enhance the combustion and agglomeration characteristics of composite propellants, with (Al/Mg)(0.5) offering the optimal balance of ignition, combustion, and agglomeration properties.
COMBUSTION AND FLAME
(2022)
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Chemistry, Multidisciplinary
Ruidong Song et al.
Summary: In this study, a two-dimensional metal clusters catalyst was successfully prepared to improve the thermal decomposition performance of AP. The catalyst showed good conductivity and strong gain-loss electron ability, which contributed to the enhanced thermal decomposition of AP and improved stability.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Energy & Fuels
Hadi Heydari et al.
Summary: In this study, two new nanocomposites of MoS2/MnO2 and POAP/MoS2/MnO2 were synthesized and characterized for their structure and performance. The POAP/MoS2/MnO2 composite exhibited excellent electrochemical performance and cycling stability, indicating its potential for higher energy storage devices.
JOURNAL OF ENERGY STORAGE
(2022)
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Chemistry, Physical
Yong Chen et al.
Summary: The effects of Sn-Cu, Sn-Co, and Sn-Ni intermetallic compounds on the thermal decomposition and ignition properties of RDX and TKX-50 were studied. The results show that these compounds can promote the thermal decomposition of RDX and reduce the exothermic peak temperature of TKX-50. Additionally, the compounds can reduce the ignition delay time and enhance the flame combustion intensity and propagation rate of both RDX and TKX-50.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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Chemistry, Physical
Haichao Fang et al.
Summary: This study successfully improved the aggregation issue and catalytic activities of metal salts in composite solid propellants by encapsulating cobalt and nickel compounds into oxidized carbon nanotubes channels. The nanocomposites showed significant effects on the thermal decomposition of ammonium perchlorate and hexogen, with enhanced catalytic efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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Jingjing Wang et al.
Summary: In this study, new MCo2O4/GO/Al nanothermites were prepared with high energy release and more violent combustion reaction. The introduction of GO significantly improved safety and enhanced electrostatic discharge sensitivity. MCo2O4/GO/Al nanothermites showed different catalytic performances on various energetic components, indicating the presence of selective catalyst.
CERAMICS INTERNATIONAL
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Xuechun Xiao et al.
Summary: In this study, MCo2O4 catalysts with different Co species substituted with transition metal ion were prepared. These porous catalysts exhibited better catalytic performance for the thermal decomposition of ammonium perchlorate.
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T. C. Anusree et al.
Summary: This study investigates the catalytic effects of different nano catalysts, including cobalt-doped CuCr2O4, on the thermal decomposition of ammonium perchlorate (AP). The results show that cobalt-doped CuCr2O4 exhibits the highest catalytic efficiency and can significantly reduce the decomposition temperature of AP.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
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Chemistry, Applied
Bingwang Gou et al.
Summary: This investigation explores the application performance of nano-combustion catalyst CuCr2O4 in solid propellants. The results show that nano-CuCr2O4 can improve the surface defects of the propellant and significantly increase its density and burning rate. This catalyst is expected to be widely used in solid propellants.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
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Dimitris Tsikritzis et al.
Summary: Hybrids of transition metal dichalcogenides (TMDs) nanoparticles on carbon-based materials have attracted attention due to their remarkable properties, and this study investigates the chemical interaction and morphology of Pd on MoS2 and MoS2-rGO substrates, as well as MoSx and MoSx-rGO hybrids. Characterization with synchrotron radiation and X-ray photoelectron spectroscopies reveals important insights into the interaction of Pd with these materials.
APPLIED SURFACE SCIENCE
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Engineering, Environmental
Xue-Xue Zhang et al.
Summary: In this paper, high-energy solid propellant crystals coated with nanosized metal oxide catalysts were successfully prepared, which exhibited lower pressure exponent and higher combustion efficiency.
CHEMICAL ENGINEERING JOURNAL
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Peng Deng et al.
Summary: In this study, flower-like MnO2 nanostructure was successfully fabricated and its application in the thermal-induced pyrolysis of energetic molecular perovskite DAP-4 was investigated. The results showed that the flower-like MnO2 nanostructure could effectively reduce the pyrolysis peak temperature of DAP-4 and increase its heat release.
Article
Chemistry, Multidisciplinary
Shengnan Li et al.
Summary: Cu/GO nanocomposites with different morphologies were synthesized and their catalytic performance for thermal decomposition of AP was investigated. The teardrop-shaped Cu/GO nanocomposites showed the highest specific surface area and the best catalytic performance. The addition of Cu/GO nanocomposites decreased the decomposition temperature and increased the exothermic heat released from AP. All four Cu/GO nanocomposites exhibited good stability.
Article
Materials Science, Ceramics
Keding Li et al.
Summary: A series of MXene/MnCo2O4.5 nanocomposites with different preparation methods were successfully synthesized. The hydrothermal method could load MnCo2O4.5 nanoparticles on MXene nanosheets to obtain MMC-W with 3D flower-like structure, showing excellent catalytic performance in AP decomposition.
CERAMICS INTERNATIONAL
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Ming Zhang et al.
Summary: The novel graphene-ferrocene nanocomposite showed improved combustion, anti-migration, safety, and mechanical properties in the AP-HTPB propellant, attributed to its positive effects on AP decomposition and gasphase products generation. The material also reduced electrostatic sensitivity and increased tensile strength of the propellant, showcasing the multifunctional capabilities of the composite.
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Chemistry, Physical
Xinlu Zhang et al.
Summary: The rational construction of hybrid materials has led to significant interest in energy storage electrode materials. The smart hybrid material in this study demonstrated exceptional cycling stability and high storage capacity, paving the way for the application of MXene-based hybrid materials in energy storage fields.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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Yongfen Zhang et al.
Summary: The study investigated the catalytic decomposition of ammonium perchlorate by magnesium oxide nanoflakes. It was found that the addition of 2% by weight of MgO nanoflakes significantly increased the decomposition temperature of AP and reduced it in the second exothermic stage.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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Teng Zhang et al.
Summary: In this study, hollow flower-like nickel particles were prepared using a facile polyol method and applied as combustion promoter in solid propellant. The diameter of the hollow particles could be accurately controlled by adjusting the concentration of the complex in the reaction solution. The addition of nickel powders promoted the exothermic decomposition of ammonium perchlorate, reducing the decomposition temperature and shifting the exothermic peak to a lower temperature range.
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Tao Chen et al.
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CHEMICAL ENGINEERING JOURNAL
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Engineering, Chemical
Xiangrui Zou et al.
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Engineering, Environmental
Xu Zhao et al.
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Summary: The GO/Fe2O3 nanocomposites synthesized via vacuum-freeze-drying method exhibit excellent catalytic performance in the thermal decomposition of ammonium perchlorate, showing potential for application in catalysis.
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Jing Lv et al.
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Keding Li et al.
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