ACS Sustainable Chemistry & Engineering
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2019
·
IF 6.97
Lin Long,Erqi Yang,Xiaosi Qi,Ren Xie,Zhong-chen Bai,Shuijie Qin,Chaoyong Deng,Wei Zhong
Lots of research have focused on the core/shell structure nanocomposites owing to their synergistic effect that were considered as the most promising high-performance microwave absorbers (MAs). However, the excellent comprehensive properties of MAs are still in urgent need. Herein, positive and reverse core/shell structure CoxFe3–xO4/MoS2 (x = 1.5, 0.75 and 0.5) and MoS2/CoxFe3–xO4 (x = 0.5) nanocomposites were elaborately produced through an inexpensive two-step hydrothermal process. It was found that the CoxFe3–xO4/MoS2 samples exhibited a much smaller optimal reflection loss (RLopt) value and a broader frequency bandwidth (fb) with the lower value of matching thickness (dm) when the CoxFe3–xO4/MoS2 loadings were raised to 60 from 30 wt %. With the x value decreasing from 1.5 to 0.5, the obtained CoxFe3–xO4/MoS2 samples displayed a much smaller RLopt value with a thinner dm and a much larger fb value with the thin dm (∼2 mm). The sample consisting of 60 wt % CoxFe3–xO4/MoS2 (x = 0.5) exhibited an RLopt value of −66.83 dB with the dm of merely 1.57 mm, and its corresponding fb value could reach 6.64 GHz with the dm of 2.02 mm. Moreover, compared with the MoS2/CoxFe3–xO4 (x = 0.5) sample, the CoxFe3–xO4/MoS2 (x = 0.5) sample displayed evidently better microwave absorbing comprehensive performances in terms of low RLopt value, large fb value, and high chemical stability. Generally, the obtained results demonstrated that the designed CoxFe3–xO4/MoS2 nanocomposites could act as MAs with outstanding comprehensive properties.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2022
·Vol. 32
·期 39
·2203528
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IF 19.924
Qiuni Zhao,Wenzhe Zhou,Mingxiang Zhang,Yang Wang,Zaihua Duan,Chaoliang Tan,Bohao Liu,Fangping Ouyang,Zhen Yuan,Huiling Tai,Yadong Jiang
Endowed with rich terminal groups, good electrical conductivity, and controllable structure, transition metal carbides/nitrides (MXenes) have attracted extensive attention for potential application in gas sensor, but long-standing challenges of the MXenes (titanium carbide as the representative) are their limited selectivity and sensitivity. Herein, a high-active double transition-metal titanium molybdenum carbide (Mo 2 TiC 2 T x ) with superstrong surface adsorption (−3.12 eV) for NO 2 gas molecule is proposed, and it is further coupled with molybdenum disulfide (MoS 2 ) by interface modulation to construct an edge-enriched heterostructure. Due to the synergistic effect of strong adsorption, rich adsorption sites, and coupling interface of Mo 2 TiC 2 T x /MoS 2 composite, the as-fabricated Mo 2 TiC 2 T x /MoS 2 gas sensor exhibits an outstanding response toward NO 2 with high selectivity against various interference gases, which is well supported by density functional theory calculations. Meanwhile, the sensor exhibits a sensitivity of 7.36% ppm −1 , detection limit of 2.5 ppb, and reversibility at room temperature. A portable, wireless NO 2 monitoring system is demonstrated for gas leakage searching and dangerous warning based on Mo 2 TiC 2 T x /MoS 2 gas sensor. This work facilitates the gas sensing application of MXenes, and provides an avenue for the development of wireless sensing system in environmental monitoring and safety assurance.
研究领域:
材料科学
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环境科学
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传感器技术
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DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2023
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IF 2.7
Liu Junli,Liu Jin,Cheng Wenxia,Yi Yunxiao,Shen Jiahao,Zhang Hua,Li Junqi,Liu Hui,Bao Yan,Hui Aiping
Bacterial contamination has bloomed into a vitality-threatening problem that plagues people. In this work, a fast and remarkable bactericidal material is developed from cerium-doped molybdenum disulfide (Ce-MoS 2 ) and silver phosphate (Ag 3 PO 4 ). The minimum inhibitory concentration (MIC) of Ce-MoS 2 /Ag 3 PO 4 nanocomposites against S. aureus was 1.12 mg mL −1 , and the antibacterial rate reached to 95.3%, in comparison with 35% of pure MoS 2 . The excellent antibacterial activities of Ce-MoS 2 /Ag 3 PO 4 could be attributed to the doping of Ce and the generation of heterojunction assisted by Ce 3+ /Ce 4+ redox mediators between MoS 2 and Ag 3 PO 4 which boost the separation efficiency of electron–hole pairs and the formation of hydroxyl radical (·OH), superoxide anion (·O 2 − ). Furthermore, TMB colorimetric assay showed that the Ce-MoS 2 /Ag 3 PO 4 possesses enhanced POD-like catalytic activity, which could constantly catalyze the production of ·OH from H 2 O 2 to kill bacteria. The outcomes of the current study emphasize the importance of the Ce-MoS 2 /Ag 3 PO 4 as a novel antimicrobial material. Graphical abstract
研究领域:
材料科学
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微生物学
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生物医学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Haochun Chen,Yin Wang,Shuxing Zhou,Nianpeng Li,Xijun Liu,Abdukader Abdukayum,Lei Zhang,Guangzhi Hu
The development of water-separation-performing, noble-metal-free, and cost-effective electrocatalysts is of the utmost importance. This work outlines the preparation of ordered, macroporous MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 electrocatalysts with heterogeneous structures using pyrolysis and sulfidation methods. The resulting macroporous and heterogeneous structures feature more active sites and facilitate ion diffusion, thereby effectively improving the overall performance. The catalyst demonstrated excellent performance in both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in a 1 M potassium hydroxide solution, requiring overpotentials of 213 and 60 mV, respectively, to achieve a current density of 10 mA cm −2 . Moreover, the MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 -based electrolyzer only requires an output voltage of 1.49 V, exhibiting superior performance and long-term stability compared to commercial catalysts. This study introduces a novel approach for achieving a heterogeneous macroporous structure that can enhance electrocatalysis .
研究领域:
材料科学
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电化学
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DOI
高影响因子
NANOTECHNOLOGY
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2020
·Vol. 31
·期 20
·205604
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IF 3.551
Lun Zhang,Juanjuan Yin,Kuo Wei,Bingfan Li,Tifeng Jiao,Yan Chen,Jingxin Zhou,Qiuming Peng
The construction of low-cost, high-performance electrocatalysts instead of platinum catalysts is critical to solving the energy crisis. Here, using simple electrospinning and hydrothermal methods, new MoS2 nanosheets on SrTiO3 nanofibers (NFs) and 2D SrTiO3@MoS2 heterostructure NFs are synthesized. In addition, SrTiO3@MoS2 heterostructure NFs are compared with bare SrTiO3 NFs and MoS2 nanosheets. Importantly, the prepared SrTiO3@MoS2 heterostructure shows better hydrogen-evolution reaction performance than other MoS2-based electrocatalysts with an overpotential of 165 mV at 10 mA cm−2, a Tafel slope of 81.41 mV dec−1, and long-term electrochemical durability of 3000 cycles. Therefore, the present work strongly demonstrates the positive synergy between SrTiO3 NFs and layered MoS2, and also provides a strategy for preparing low-cost and high-activity water-decomposition electrocatalysts.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
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2019
·Vol. 6
·期 2
·590-597
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IF 5.934
Xiaoqing Cui,Wei Liu,Weihua Gu,Xiaohui Liang,Guangbin Ji
In recent years, two-dimensional inorganic materials (MoS2) have been promising candidates for EM wave absorber because of their high specific surface area, excellent electronic properties and dielectric loss caused by polymorphism. Nevertheless, the poor impedance matching of individual MoS2 limited its microwave absorption performance. Optimizing the impedance matching of microwave absorber can be an effective way to achieve electromagnetic wave attenuation. In this study, we deposited CoFe2O4 magnetic nanoparticles on the surface of MoS2 nanosheets using reasonable hydrothermal reactions to optimize its poor impedance and enhance interfacial polarization. The MC-6 composite (mMoS2 : mCoFe2O4 = 6 : 1) exhibited excellent microwave absorption capability. The minimum reflection loss (RL) reached −55.3 dB at 16.24 GHz (Ku band) and the effective absorption bandwidth (<−10 dB) was measured to be 6.26 GHz (X band) with a thickness of 1.6 mm. This study confirms that optimizing impedance matching and interfacial polarization of MoS2-based composites play a key role in the microwave response. Moreover, the reasonable optimization of impedance matching enables regulation of the effective bandwidth and strong absorption intensity.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
DALTON TRANSACTIONS
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2019
·Vol. 48
·期 35
·13176-13183
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IF 4.052
Lang Pei,Yongjun Yuan,Jiasong Zhong,Taozhu Li,Tao Yang,Shicheng Yan,Zhenguo Ji,Zhigang Zou
Tantalum nitride (Ta3N5) with an appealing band gap (∼2.1 eV) has emerged as a promising catalyst in the photocatalysis field. However, Ta3N5 application in the photocatalytic hydrogen evolution reaction (HER) is limited due to disadvantages such as unsatisfactory separation and transfer of photogenerated carriers. Here we utilize MoS2 as co-catalysts to promote the kinetics of photocatalytic H2 evolution over Ta3N5. The Ta3N5 nanorods were encapsulated into 3D hydrangea-like MoS2 for maximizing the contact areas between Ta3N5 and MoS2 and offering rich active sites. More importantly, spectroscopic analysis and theoretical calculations consistently reveal that the unique interfacial interaction, as well as the matching band alignment between Ta3N5 and MoS2, accelerates the photogenerated charge extraction from Ta3N5 to MoS2, reducing charge recombination losses in Ta3N5. Thus, the optimized Ta3N5/MoS2 hybrid exhibits a substantially enhanced hydrogen evolution rate (56.5 μmol h−1), over 22 times higher than that of pristine Ta3N5. This work may provide a general strategy to overcome the low photocatalytic activity of nitrides for hydrogen evolution.
研究领域:
材料科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2023
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IF 5.7
Linjuan Wang,Mingpu Kou,Julie Tournet,Siva Karuturi,Ling Zan
Background Recognized for its high calorific value, clean and non-polluting properties, hydrogen is considered to be one of the most attractive solutions to the impending energy crisis. Photocatalytic water splitting has been widely investigated for its promise to produce hydrogen in a sustainable, environmentally friendly and low-cost approach. In pursuit of high photocatalytic efficiency, multiple strategies haven been explored such as doping, co-catalyst modification and heterojunction construction realizing promising improvements. Methods We synthesized CdS doped with Zn ions and modified with MoS 2 as co-catalyst to form Zn x Cd 1− x S solid solution and MoS 2 -Zn 0.25 Cd 0.75 S heterojunction using a simple one-step hydrothermal method. The synthesized catalyst was used water splitting under visible light irradiation. The structural and morphological characteristics of these materials, along with their photocatalytic mechanisms, were investigated using multiple techniques such as SEM, TEM, XPS, PL, etc. Findings The photocatalyst consisting of 0.9 wt.% MoS 2 -Zn 0.25 Cd 0.75 S achieved a production rate of 6276 μmol h −1 g −1 , which is 17.4 times higher than that of pure CdS and 1.6 times higher than that of Zn 0.25 Cd 0.75 S. The composite also demonstrated a high apparent quantum yield of 11.1 % at 420 nm. The mechanism of the water splitting process, revealed through various techniques, introduces novel pathways for crafting high-efficiency photocatalysts with an internal electron-hole separation heterostructure.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
WEAR
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2025
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IF 6.1
Sudesh Singh,Tianyi Han,Xinchun Chen,Chenhui Zhang
Although MXene and MoS 2 individually possess outstanding anti-friction and wear-resistant properties in numerous applications, the combination of both in the recent past has created a new frontier in cutting-edge applications. The current work insights into the impregnation of porous alumina ceramics in the MXene (1 wt %), MoS 2 (1 wt %), and hybrid (0.5 wt % MXene +0.5 wt % MoS 2 ) solution to fabricate self-lubricating alumina composites via vacuum impregnation method and afterward exploring the mechanical as well as tribological properties of the synthesized composites. A significant strengthening of the matrix for impregnated composites was observed compared to unimpregnated porous ceramics. The impregnated composites were slid against the zirconia ball to assess the friction behavior. The results revealed that the ceramics impregnated with MXene only can reduce COF by ∼43 % of that unimpregnated ceramics; however, in conjunction with MoS 2, the reduction can be lowered to ∼70 % attributed to synergistic effect of MXene and MoS 2 to form the tribo-layer over interacting surfaces. The study concludes that hybrid (MXene/MoS 2 ) impregnation of porous ceramics exhibits excellent self-lubricating properties over other impregnations, making them suitable candidates for advanced tribological applications. This novel combination leverages the unique properties of MXene and MoS 2 to enhance the longevity and performance of porous ceramics in demanding operational environments.
研究领域:
材料科学
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机械工程
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表面工程
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DOI
高影响因子
POLYMER COMPOSITES
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2025
·
IF 4.7
Rong Du,Jin Zhang,Dinghao Sun,Tong Lin,Yanzhou Wang,Lv Yin,Yuanpeng Wu
The MoS 2 /lignin hybrid material was successfully synthesized and incorporated into an epoxy resin to fabricate composite coatings. The results demonstrate that MoS 2 is uniformly attached to the surface of lignin sheets. Compared to adding lignin alone, the MoS 2 /lignin hybrid-epoxy resin (EP) composite coatings exhibited enhanced friction-reducing and wear-resistant properties. Specifically, the 1 wt% MoS 2 /lignin hybrid displayed excellent dispersion and high interfacial compatibility within the resin matrix, leading to a 66.7% increase in Vickers hardness, a 27.5% increase in tensile strength, and a 73.9% improvement in char yield. Furthermore, the friction coefficient and wear rate were reduced by 63.2% and 75.8%, respectively. As a uniformly dispersed hybrid structure, the MoS 2 /lignin material can endure higher loads, autonomously repair defects, and form a stable and complete transfer film on the worn surface, demonstrating synergistic friction-reducing and wear-resistant effects within the epoxy resin matrix. Integrating MoS 2 into a two-dimensional material can provide a practical reference for designing polymer-based hybrid materials with outstanding comprehensive properties. Highlights The MoS 2 /lignin hybrid material was successfully synthesized. MoS 2 is uniformly attached to the surface of lignin sheets. The hybrid significantly enhances friction-reducing and wear-resistant properties. Vickers hardness increased by 66.7%, and tensile strength increased by 27.5%. The friction coefficient was reduced by 63.2%, and the wear rate was reduced by 75.8%.
研究领域:
材料科学
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复合材料
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表面工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Jirong Bai,Wenhua Lv,Zhijiang Ni,Zhilei Wang,Gang Chen,Haiyang Xu,Hengfei Qin,Zheng Zheng,Xi Li
MoS 2 /S-doped porous g-C 3 N 4 (MoS 2 /SPGCN) hybrids were fabricated via a facile calcination and ultrasound assembly method. Structural characterization indicated MoS 2 nanosheets were successfully loaded on SPGCN isotype heterojunction hybrids. The MoS 2 /SPGCN photocatalysts showed more visible light absorption, larger specific surface area, and faster electron-hole separation. MoS 2 /SPGCN significantly accelerated Rhodamine B photodegradation under visible light irradiation, which was mainly because the enriched active sites, broadened visible light absorption, and newly-formed heterojunction between MoS 2 nanosheets and SPGCN together suppressed the recombination of photoinduced electron-hole pairs. MoS 2 /SPGCN also showed excellent recyclability and chemical stability. Thus, this work presents a good strategy of designing efficient photocatalysts by substituting the single catalyst base with metal-free isotype heterojunction hybrids.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Bingjie Huo,Jingxue Wang,Zichen Wang,Chao Liu,Wenjing Hao,Yinglong Wang,Peizhe Cui,Jianguang Qi,Jun Gao,Jingwei Yang,Fanqing Meng
Wood is a natural material with low cost and easy recovery, which porous, layered, excellent structure and mechanical properties make it possible to apply in wastewater treatment. We have successfully grown MoS 2 on natural wood containing porous cellulose and introduced the high conductivity circuit path provided by Ni nanoparticles to construct a new piezoelectric three-dimensional wood block for the efficient degradation of tetracycline. Ni/MoS 2 /Wood exhibited excellent piezo-catalytic degradation performance, and the degradation rate of tetracycline reached 95.96 % (k = 0.0411 min −1 ) under ultrasonic vibration. After 5 cycles, the degradation rate still reached 90.20 %. In addition, Ni/MoS 2 /Wood was used as the reactor filler to degrade tetracycline through piezoelectric response triggered by hydrodynamic force, and the degradation rate reached 90.27 % after 60 min. Further, the mechanism and the possible degradation pathways of tetracycline degradation were proposed. This low-cost, recyclable and stable three-dimensional wood block piezoelectric material provides a new idea for the practical application of wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）