MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Haoliang Wen,Bo Lei,Weidong Zhang
The rational design of hollow-structured composite absorbing materials is emerging as a promising approach for enhancing microwave performance. The present study successfully synthesized a series of ZIF-67/MoS 2 composites with adjustable size range using a two-step method and achieved the formation of magnetically responsive Co/C/MoS 2 hybrids through high temperature pyrolysis. The findings demonstrated that ZIF-67/MoS 2 (1:12) exhibited a wide effective attenuation bandwidth (EAB) (5.60 GHz from 12.40 GHz to 18.0 GHz) with a thickness of 2.4 mm, and minimum reflection loss (−43.46 dB) at 2.1 mm. However, Co/C/MoS 2 hybrid possessed the better EAB (5.95 GHz from 11.61 GHz to 17.56 GHz) at 1.2 mm and minimum reflection loss (−51.83 dB) at a thickness of 1.0 mm. The ingeniously synthesized ZIF-67/MoS 2 and Co/C/MoS 2 composites, hence, unravel themselves as a promising and exceedingly efficient contender for lightweight microwave absorption.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yanming Wang,Yao Wang,Bihai Su,Feibo Li,Linlin Shi,Xiaojing Wang,Lingwei Li,Jiale Zhao,Tianlong Wang,Ping Li,Xiaoliang Zhang,Jingbo Mu,Gai Zhao,Yu Dong
Proton exchange membrane (PEM) is widely implemented as a pivotal component in fuel cell technology. However, cost-effectiveness and complex preparation protocols of commercial PEMs remain major challenges for PEM applications. In this paper, a variety of sulfonated polyimide (SPI) composite films filled with ionic liquids @ molybdenum sulfide (ILs@MoS 2 ) are prepared, which simultaneously yield superior proton conductivity and reduced pollution with feasibility. It is found that with increasing the ILs@MoS 2 ratio, composite films with an ILs@MoS 2 content of 1.5 wt% exhibit a significant improvement of 68 % in proton conductivity, increasing from 0.0778 to 0.1308 S/cm at 80 °C under 100 % relative humidity (RH). This result is believed to be partly attributed to the presence of the dense network of active sites and hydrogen bonds promoted by ILs@MoS 2 . Overall, SPI composite films modified by ILs@MoS 2 demonstrate potential as alternatives for applications in PEM technologies.
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Results in Chemistry
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2025
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IF 4.2
Qin Gao,Qi Pan,Youzhi Cao,Yingping Chen,Sixue Zhai,Haijing Qiu,Beibei Fan,Yanyan Yang,Chunhai Luo
Hospital wastewater poses significant public health risks due to the presence of antibiotic-resistant bacteria and other pathogens. Herein, a positively charged GO/ MoS 2 @PEI (GMP) nanozyme for ecofriendly, low energy consumption and low systemic toxicity were synthesized. The positive surface potential of GMP enhances the adsorption of anionic lipopolysaccharide (LPS) and lipoteichoic acid (LTA) present on bacterial membranes, thereby improving bacterial capture and interaction with the antibacterial agent. Under visible light (VL) illumination from a common fluorescent lamp, the GMP nanozyme shows a synergistic photocatalytic effect, achieving 100 % antibacterial efficiency against both Gram-negative and Gram-positive bacteria. Electron paramagnetic resonance (EPR) experiments confirmed the pivotal role of superoxide radicals (•O 2 − ) and hydroxyl radicals (•OH) in the bacterial inactivation process. This work provides innovative synergistic strategy for constructing nanomaterials for highly efficient biofouling control in hospital wastewater.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Guangyu Xu,Han Chen,Jingjing Cai,Baowei Hu,Linfa Bao
The contamination of heavy metals and antibiotics represents one of the most serious environmental issues. In this study, the synergistic removal of chromium (Cr(VI)) and tetracycline (TC) by nZVI/MoS 2 composites was investigated to evaluate the removal performance of nZVI-based composites. The characterizations showed that the addition of MoS 2 increased the dispersion of nZVI, provided multiple electron-rich active sites and facilitated the electron transfer of photocatalysis. The addition of TC significantly enhanced the Cr(VI) removal rate, increasing it from 60 % to 80 % within 10 min. The catalytic reaction rate of nZVI/MoS 2 increased from 0.0046 to 0.0163 min −1 . Furthermore, the presence of Cr(VI) also improved the photodegradation efficiency of TC. Based on XPS and EPR analyses, the synergistic removal of Cr(VI) and TC was mainly attributed to enhanced electron transfer promoted by the presence of TC, which accelerated the photocatalytic reduction of Cr(VI) to Cr(III). Surface complexation modeling further confirmed that Cr(VI) removal by nZVI/MoS 2 involved both adsorption and reduction processes. These results are anticipated to inform the design of more efficient nZVI-based composites for practical applications in environmental remediation.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Zhiwei Wang,Xiang Zhao,Fangzhen Hong,Hao Wang,Heng Lei,Zhiming Chou,Jiandong Zheng
The development of room-temperature (RT) formaldehyde sensors is significant for indoor air quality monitoring. In this contribution, titanium (Ti)-incorporated 1T/2H molybdenum disulfide (MoS2) phase heterostructures were prepared via a facile hydrothermal method. Compared with 1T/2H MoS2, the as-prepared 1T/2H Mo1–xTixS2 nanosheets showed a boosted RT formaldehyde sensing performance, which was attributed to the enhanced gas adsorption and charge transfer processes induced by Ti incorporation and could be regulated by tuning the Mo/Ti ratio in Mo1–xTixS2. In addition, the Ti-incorporated phase heterostructures with an optimized 1T concentration showed further improved gas-sensing properties compared to the highly metallic or semiconducting nanosheets with the same chemical composition, which exhibited an obvious response of 0.035% to 1 ppm formaldehyde with an excellent limit of detection as low as 39 ppb, good repeatability, and short response and recovery times. Moreover, flexible gas sensors based on the optimized nanosheets showed well-maintained responses under moderately bent conditions. Our findings demonstrate that the creation of phase heterostructures with tunable compositions and phases may provide more opportunities to tailor their sensing properties.
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INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2024
·Vol. 76
·期 4
·486-499
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IF 1.5
Ziyan Lu,Feng Qiu,Hui Song,Xianguo Hu
PurposeThis paper aims to solve the problems molybdenum disulfide (MoS2) nanosheets suffer from inadequate dispersion stability and form a weak lubricating film on the friction surface, which severely limits their application as lubricant additives.Design/methodology/approachMoS2/C60nanocomposites were prepared by synthesizing molybdenum disulfide (MoS2) nanosheets on the surface of hydrochloric acid-activated fullerenes (C60) by in situ hydrothermal method. The composition, structure and morphology of MoS2/C60nanocomposites were characterized. Through the high-frequency reciprocating tribology test, its potential as a lubricant additive was evaluated.FindingsMoS2/C60nanocomposites that were prepared showed good dispersion in dioctyl sebacate (DOS). When 0.5 Wt.% MoS2/C60was added, the friction reduction performance and wear resistance improved by 54.5% and 62.7%, respectively.Originality/valueMoS2/C60composite nanoparticles were prepared byin-situformation of MoS2nanosheets on the surface of C60activated by HCl through hydrothermal method and were used as potential lubricating oil additives.Peer reviewThe peer review history for this article is available at:https://publons.com/publon/10.1108/ILT-10-2023-0321/
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Yang Li,Shouwei Zuo,Qiaohong Li,Huawei Huang,Xin Wu,Jing Zhang,Huabin Zhang,Jian Zhang
Hierarchical structures with a complex interior and a functional exterior are highly advantageous for energy-related electrocatalysis. Herein, a carbon-supported molybdenum carbide/sulfide heterostructure interior is covered with a defect-rich MoS 2 nanosheet exterior. The resulting hierarchical structure (C–MoCS x @MoS 2 ) is a promising nanoreactor for seawater splitting. X-ray absorption spectroscopy demonstrates that MoC and MoS 2 are chemically integrated into the C–MoCS x core, providing abundant C–Mo–S sites for hydrogen evolution. Experimental studies and theoretical calculations show that the defect-rich MoS 2 exterior exhibits a high capability for repelling salt deposition, allowing the penetration of low-saline water into the inner C–MoCS x to accelerate the water-splitting reaction. As expected, the obtained C–MoCS x @MoS 2 is remarkably active and exceptionally stable in natural seawater. This work opens new avenues for developing effective electrocatalysts for seawater splitting and other energy-related applications.
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ACS Applied Electronic Materials
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2025
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IF 4.7
Rongxiang Ding,Ziyang Zhang,Hao Wu,Liwei Deng,Yuanjian Yuan,Yue Huang,Mengjian Zhu,Ziao Tian
Wafer-scale single-crystalline MoS2 epitaxially grown on sapphire by chemical vapor deposition (CVD) is expected to exhibit exceptional electrical and optoelectronic properties for the large-scale integration of two-dimensional (2D) semiconductor circuits. Prior studies proposed thermodynamic pathways for achieving unidirectional MoS2 domains. However, thermodynamic conditions are insufficient to achieve wafer-scale growth of unidirectional MoS2, while kinetic control during epitaxy remains unexplored. Here, we demonstrate the kinetics-driven adatoms diffusion and nuclei rotation by controlling the epitaxy temperature during the CVD process. We achieve the epitaxy of triangular MoS2 single-crystalline domains with a single orientation on sapphire. By carefully designing the Mo oxidation, dual-source delivery, and two-stage annealing, the nucleation density of MoS2 is reduced, and the domain size and uniformity are greatly enhanced. The fine control of the growth kinetics boosts the 2 in. wafer-scale continuous MoS2 single-crystalline film. The uniformity and single crystallinity were confirmed by Raman spectroscopy, photoluminescence, atomic force microscopy, low-energy electron diffraction, and second-harmonic generation. Furthermore, field-effect MoS2 transistors exhibited high room-temperature mobility up to 118 cm2·V–1·s–1, high on/off ratio over 1010, and steep subthreshold swing of ∼85 mV·dec–1. This work not only provides a feasible strategy for the manufacture of high-quality wafer-scale MoS2 films but also sheds light on the growth of other 2D semiconductor wafers.
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MATERIALS CHEMISTRY AND PHYSICS
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2024
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IF 4.3
Shaoqing Wang,Xiangqing Wu,Faqin Xie,Jiayu He,Hao Yu
The innovative work presented in the paper focused on microstructures and wear performance of MoS 2 doped Al 2 O 3 coatings on TC6 alloy. Nano- and micron-sized MoS 2 particles doped Al 2 O 3 coatings (n and m-MoS 2 /Al 2 O 3 coating) were fabricated on TC6 alloy via cathodic plasma electrolytic deposition (CPED) technique. The microstructures and compositions of the coatings were characterized, the tribological behaviors were tested, and doping mechanism of MoS 2 particles was discussed. The results showed that, doped coatings were composed of α -Al 2 O 3 , γ -Al 2 O 3 and MoS 2 . The doping of MoS 2 particles promoted the transformation from γ -Al 2 O 3 to α -Al 2 O 3 during CPED process , and increased the compactness and crystallinity of doped coatings. The friction coefficients of TC6 alloy, Al 2 O 3 coating, n-MoS 2 /Al 2 O 3 coating and m-MoS 2 /Al 2 O 3 coating were about 0.7, 0.6, 0.55 and 0.45 in sequence, and the wear rates of n-MoS 2 /Al 2 O 3 coating and m-MoS 2 /Al 2 O 3 coating were about 75 % and 58 % of Al 2 O 3 coating. MoS 2 particles played the role of lubrication and contributed to improving wear performance of doped coatings, both friction coefficients and wear rates were declined, and micron-sized MoS 2 particles presented better wear performance than nano-sized particles.
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Carbon Neutrality
·
2024
·Vol. 3
·期 1
·1-20
·
IF 0
Guo Yafei,Gao Yuxuan,Guo Benshuai,Luo Yangna,Zhao Guoyang,Sun Jian,Li Weiling,Wang Ruilin,Zhao Chuanwen
Electrochemical CO 2 reduction (ECR) to value-added products is regarded as a sustainable strategy to mitigate global warming and energy crisis, and designing highly efficient and robust catalysts is essential. In this work, transition metal sulfides (TMS)-decorated CuS microflower-like structures were prepared via the one-pot hydrothermal synthesis method for ECR to CO, and the influence of TMS doping on ECR performance was demonstrated. Characterization of the catalysts was performed using XRD, FESEM-EDS, N 2 physisorption, and XPS, revealing the successful loading of TMS, the formation of microflower-like architectures and the generation of sulfur vacancies. Electrochemical tests demonstrated that doping ZnS, Bi 2 S 3 , CdS and MoS 2 improved the intrinsic CO 2 reduction activity of the CuS catalyst. Particularly, the MoS 2 -CuS composite catalyst with imperfect petal-like structure showed uniform distribution of edge Mo sites, which worked synergistically with the formed grain boundaries (GBs) and undercoordinated S vacancy sites in promoting CO 2 activation, stabilizing * COOH adsorption, facilitating * CO desorption, and lowering the energy barrier of the potential-limiting step for improved CO selectivity. The MoS 2 -CuS catalyst achieved a maximum CO selectivity of 83.2% at –0.6 V versus the reversible hydrogen electrode (RHE) and a high CO cathodic energetic efficiency of 100%. At this potential, the catalyst maintained stable catalytic activity and CO selectivity during a 333-min electrolysis process. The findings will offer a promising avenue for the development of efficient and stable catalysts for CO production from ECR.
研究领域:
材料科学
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环境科学
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能源化学
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PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2016
·Vol. 254
·期 4
·1600245
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IF 1.522
Song Hao,Bingchu Yang,Yongli Gao
Monolayer MoS 2 is an emerging two-dimensional semiconductor with wide-ranging potential applications in novel optoelectronic devices and catalysis. Here, we report the growth of drop-like monolayer MoS 2 /MoO 2 granular films on SiO 2 /Si substrate by chemical vapor deposition method. The as-synthesized films were systematically characterized by various means of optical microscopy, X-ray/ultraviolet photoemission spectroscopy, scanning electron microscopy, atomic/kelvin force microscopy, X-ray diffraction, Raman and photoluminescence techniques. The combined results of atomic force microscopy and scanning electron microscopy clearly present novel drop-like granulars and domain boundaries, ascribed to lower growth temperature. X-ray photoemission spectroscopy results complemented by Raman and X-ray diffraction results confirm the formation of MoS 2 /MoO 2 granular films. The ultraviolet photoemission spectroscopy, along with kelvin force microscopy, reveals a different nature of surface potential of drop-like MoS 2 granular films compared with crystalline MoS 2 , owing to electron transfer from MoS 2 to MoO 2 and drop-like structure. Our study broadens the scope of two-dimensional transition metal dichalcogenides research and reveals the distinct physical properties of drop-like monolayer MoS 2 granular films.
研究领域:
材料科学
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物理化学
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2018
·Vol. 18
·期 7
·5049-5053
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IF 1.354
Meng Xiuqing,Yang Dawei,Fang Yunzhang,Ye Huiqun,Su Wenming
In place of the widely studied graphene, monolayer or few-layer MoS2 flakes are promising materials for next-generation optoelectronic devices. MoS2 has attracted increasing attention in physics and its applications because of its capacity to undergo indirect-to-direct
band gap transition. Raman spectroscopy is a useful and versatile tool to probe the physical properties of pristine and intercalated MoS2. This study investigates for the first time the multiphoton modes of FeCl3- and Zn-intercalated few-layer MoS2 at high
frequencies of 1513 and 1732 cm−1 for FeCl3–MoS2 and 1341 and 1604 cm−1 for Zn–MoS2. The substrates interact with MoS2 during intercalation. The Raman peak intensities of the intercalated samples vary
with intercalation time while keeping the peak position nearly constant. This finding is interesting and suitable for studying other 2D layered materials.
研究领域:
物理学
·
材料科学
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