JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Wei Zhao,Jincheng Liu,Zhongxiang Ding,Jinhong Zhang,Xiaoyu Wang
CdS nanophotocatalysts generally require precious metal Pt as a cocatalyst to enhance photocatalytic hydrogen production performance, but precious metal Pt reserves are scarce and expensive. Therefore, this study hopes to prepare CdS/MoS 2 (CM) composites by uniformly distributing MoS 2 nanosheets on the surface of CdS nanowires by a two-step method. After a series of tests, CM composite can expand the absorption range of visible light and improve the separation and transmittance of photogenerated electrons and holes. The results show the highest hydrogen production rate of 1.79 mmol•g −1 •h −1 was obtained with the CdS/MoS 2 ratio of 0.3, which is 35.8 times that of bare CdS nanowires. The excessive MoS 2 nanosheets will block light adsorption of CdS and inhibit the hydrogen production performance of the CM composite. This study provides a new research direction for finding cheap cocatalysts to replace precious metal Pt.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Wenwen Wang,Shihui Jiao,Boran Wang,Yumei Tan,Yue Zhao,Qi Zhang,Yutang Kang,Xinyan Lv,Canyu Cui,Guangsheng Pang
MoS 2 /CuS nanosheets coated on brass mesh with switchable superwettability have been prepared through a facile hydrothermal method. The MoS 2 /CuS coated mesh shows excellent underwater superlyophobicity and underliquid superhydrophobicity for gravity-driven immiscible organic solvent/water mixtures separation. Switchable permeation function of water-removing or organic solvent-removing can be achieved by water or organic solvent pre-wetted mesh. After 20 cycles of organic solvent/water separation, the MoS 2 /CuS coated mesh demonstrates high separation efficiency above 99.5% for both of cyclohexane/water mixture and tetrachloroethylene/water mixture. The MoS 2 /CuS coated mesh presents satisfactory chemical stability under acidic or alkaline conditions in the pH range of 1–13. The switchable superwetting property and chemical stability make it possible to be a potential candidate in separation of immiscible organic solvent/water mixture.
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Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Feng-Yi Wu,Yuan-Sheng Cheng,Dong-Mei Wang,Ming-Ling Li,Wen-Sheng Lu,Xiao-Yong Xu,Xiu-Hong Zhou,Xian-Wen Wei
Nitrogen-doped MoS 2 quantum dots (N-MoS 2 QDs) were synthesized via a facile hydrothermal approach, and exhibited high fluorescence quantum yield (QY, 14.9%), excellent photostability, biocompatibility and water solubility. A novel method with good selectivity and sensitivity was established to assay hematin using N-MoS 2 QDs as a fluorescent probe based on inner filter effect (IFE). Fluorescent quenching of N-MoS 2 QDs has a fine linear dependence with the concentration of hematin in the range of 0.5–15 μmol/L and a limit of detection of 0.32 μmol/L (S/N = 3). By the detection method, average concentration of hematin in real health human erythrocytes was measured as 22.5 ± 3.9 μmol/L. And, recoveries range varied from 94 to 108% through standard recovery experiment. The N-MoS 2 QDs probe shows excellent photostability, low cytotoxicity and anti-interference ability for hematin assay, which may become a promising method for the test of hematin in human blood.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Cunwei Wang,Man Peng,Xishun Peng,Haili Zhang,Caizhen Zu,Zhangwei Tan,Yuxue He,Zhongchen Bai
This study presents a surface-enhanced Raman scattering (SERS) sensing platform based on a MoS 2 /Au@Ag heterojunction for specifically detecting the residues of thiram pesticide. A Nano-MoS 2 film was firstly prepared by depositing MoS 2 nanosheets on the surface of a stainless steel sheet. Subsequently, Au nanoparticles and Ag nanoparticles were deposited on the surface of MoS 2 film to form a MoS 2 /Au@Ag heterojunction for SERS application. This well-performing SERS substrate was originated from the synergistic effect of electromagnetic (EM) enhancement and chemical (CM) enhancement to boost its SERS signal. Here, the CM contribution could be up to 41.8 % in the process of optimizing interfacial charge transfer (CT) pathways in MoS 2 /Au@Ag heterojunction. Thus, the SERS sensor based on MoS 2 /Au@Ag film showed an excellent signal homogeneity (RSD = 4.36 %) and an ultrahigh sensitivity to thiram molecules with a limit of detection (LOD) as low as 0.32 nM. Moreover, it could also recognize the thiram residues at 10 nM level in citrus peels, with a recovery rate of 91.0–109.0 %. The SERS sensor we developed in this study has a high sensitivity, excellent reproducibility, and long-term stability, which could be widely applied for the food safety monitoring
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zongli Liu,Tian Wang,Pu Chang,Lixiu Guan,Xiaohu Wang,Chao Xu,Yingxuan Cao,Junguang Tao
Although electrocatalytic water splitting is a very promising and sustainable method for generating hydrogen as a clean energy source, the design and synthesis of stable and efficient noble metal-free catalysts faces some serious challenges. In this work, an electrocatalyst with heterostructure of MoS 2 and orthogonal phase of CoSe 2 (MoS 2 @o-CoSe 2 ) is derived from Co-based metal organic framework (Co-MOF). The complex shows excellent hydrogen evolution reaction (HER) activity and long-term stability in alkaline medium attributed to its porous structure , ultrathin nanosheet morphology, synergistic effect of each component owing to the tightly bonded interface and optimal electronic structure after phase transition. MoS 2 @o-CoSe 2 exhibits low overpotential of 34 mV at a current density of 10 mA cm −2 and a Tafel slope of 41 mV dec −1 . These results are superior to most recently reported Mo-based and Co-based electrocatalysts. Importantly, the performance of MoS 2 @o-CoSe 2 at high current densities is even better than that of commercial Pt/C electrode. Our results emphasize the importance of phase engineering and show that the combination of MOF with transition metal disulfides is an effective way to develop highly active and sustainable efficient electrocatalysts for water hydrolysis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xin Xu,Yawen Qiu,Zichen Len,Zongquan Chen,Wenxuan Zhu,Wenqing Zhao,Yue Dai,Liang Cao,Hongbo Geng
Molybdenum disulfide (MoS 2 ) has garnered attention as a promising anode material for sodium-ion batteries due to its high theoretical capacity and unique lamellar texture. Nevertheless, unmodified MoS 2 suffers from inferior electrical conductivity, poor reaction reversibility, and suboptimal cycle life upon repeated sodiation/desodiation. In this study, a novel carbon-free V-heteroatom doping MoS 2 composite ( abbr. VMS) with hierarchical laurustinus-like structure was synthesized by a facile one-step hydrothermal process. Specifically, the rational doping of V-atoms can effectively modulate the intrinsic electronic structure of pure MoS 2 , resulting in enhanced Na-ion diffusion rate, improved reaction kinetics and reduced activation energy compared to bare MoS 2 . Additionally, the hierarchical structure of the VMS composite, with sufficient spacing, effectively mitigates mechanical stress and ensures the integrity of active materials. Consequently, the prepared VMS composite possesses exceptional reaction reversibility (average ICE value of 92 %) and remarkable capacity retention (92.1 % after 450 cycles at 10 A/g). These findings contribute valuable insights into the development of advanced MoS 2 -based anode for sodium ion batteries .
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 19
·3329
·
IF 5.719
Luogang Xie,Yang Yang,Gaoshang Gong,Shiquan Feng,Dewei Liu
Lead ions in water are harmful to human health and ecosystems because of their high toxicity and nondegradability. It is important to explore effective fluorescence probes for Pb2+detection. In this work, surface-functionalized molybdenum disulfide quantum dots (MoS2QDs) were prepared using a hydrothermal method, and ammonium tetrathiomolybdate and glutathione were used as precursors. The photoluminescence quantum yield of MoS2QDs can be improved to 20.4%, which is higher than that for MoS2QDs reported in current research. The as-prepared MoS2QDs demonstrate high selectivity and sensitivity for Pb2+ions, and the limit of detection is 0.056 μM. The photoluminescence decay dynamics for MoS2QDs in the presence of Pb2+ions in different concentrations indicate that the fluorescence quenching originated from nonradiative electron transfer from excited MoS2QDs to the Pb2+ion. The prepared MoS2QDs have great prospect and are expected to become a good method for lead ion detection.Keywords:molybdenum disulfide;quantum dots;lead ion;fluorescence probe
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jinyong Hu,Xing Liu,Jiawei Zhang,Xin Gu,Yong Zhang
Developing high-performance gas-sensing devices based on transition metal dichalcogenides (TMDs) has sparked significant research interest in efficient detection of hazardous gases at room temperature . Considering that the gas-sensing performances of TMDs-based sensors can be effectively improved by the localized surface plasmon resonance (LSPR) effect of decorated noble-metal nanoparticles, herein, we explored the LSPR effect on gas-sensitive features via the design of a visible-light-assisted gas sensor using Au@MoS 2 core-shell heterostructures as sensitive materials. The internal connection between the optical absorption and the gas-sensing properties of Au@MoS 2 heterostructures was investigated. Intriguingly, under the activation of indoor white-light, the optimized Au@MoS 2 sensor displayed an enhanced response by more than 8 times and elevated recoverability from 60% to 98% almost without baseline shift as compared with the pure MoS 2 gas sensor for the detection of NO 2 (1 ppm). The combination of experimental and theoretical analysis indicates that the improved gas-sensing performances can be primarily attributed to the effective amplification of the light absorption efficiency of MoS 2 induced by the LSPR effect from the Au nanoparticle cores. These results imply a potential application in monitoring NO 2 gas at room temperature and open up an effective thoughtway for developing high-performance visible-light-modulated gas sensors.
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高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 2
·292
·
IF 4.034
Zhi Zhang,Xuliang Lv,Yiwang Chen,Pin Zhang,Mingxu Sui,Hui Liu,Xiaodong Sun
For the purposes of strength, military equipment camouflage, and protecting the health of organisms, electromagnetic wave absorbing materials have received a lot of attention and are widely studied. In addition to having a strong absorption intensity and a wide effective absorption bandwidth, materials that are lightweight, thermally stable, and antioxidative are also highly desirable. In this study, we fabricated core–shell structured NiS2@MoS2nanospheres anchored on reduced graphene oxide (rGO) nanosheets (NiS2@MoS2/rGO) by a simple two-step hydrothermal method. The combination ratio was adjusted to achieve proper impedance matching. The electromagnetic parameters and the absorption performance were investigated in detail. A composite loaded with 30 wt.% of the sample achieved a minimum reflection loss (RL) value of −29.75 dB and the effective bandwidth (RL value of less than −10 dB) ranged from 4.95 GHz to 18.00 GHz (13.05 GHz), with a thickness ranging from 1.5 mm to 4.0 mm. This study proved that the generated significant interfacial polarization and synergetic interaction between components can result in NiS2@MoS2/rGO composites with enhanced electromagnetic absorption performance.Keywords:graphene;core–shell;heterostructure;electromagnetic absorption
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Di Yang,Liqiang Zhang,Tongtong Yu,Changhe Du,Liucheng Wang,Wenpeng Wang,Yange Feng,Weimin Liu,Daoai Wang
Self-lubricating porous polyimides (PPI) are widely used in aerospace, microelectronics and other fields because of their excellent properties. The porous structure of PPI can present drawbacks, such as reduced surface strength, elastic collapse and diminished wear resistance, making the exploration of strategies to minimize surface wear of PPI essential for extending its service life and enhancing material stability. In this work, a novel self-lubricating porous polyimide (PPI-gel-TAM) with outstanding tribological properties is synthesized, exhibiting high oil-bearing capacity and superior retention stability. PPI-gel-TAM attains macro-superlubricity, exhibiting a coefficient of friction (COF) of ≈0.007. The wear rate of the PPI decreased significantly from 3.52 × 10 −5 to 2.81 × 10 −8 mm 3 ·N −1 ·m −1 after the incorporation of tannic acid-functionalized MoS 2 nanosheets (TA-MoS 2 ). The attainment of superlubricity is enabled by a self-adaptive confined lubrication strategy, which integrates the synergistic effects of four mechanisms: oil supply from the porous structure, the shear-thinning properties of lubricants, the interaction between functionalized MoS 2 and oil molecules, and the formation of a protective tribofilm. This study presents a novel and effective strategy for self-lubricating porous polymers to maintain both superior oil content and retention capabilities, while also exhibiting exceptional tribological properties.
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高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 28
·5682-5690
·
IF 6.331
Kangqiang Liang,Shaohua Qu,Yixiao Li,Li-li Tan,Li Shang
Molybdenum disulfide quantum dots (MoS2 QDs) have drawn increasing attention owing to their distinct optical properties and potential applications in many fields such as biosensing, photocatalysis and cell imaging. Elucidating the relationship between the surface chemistry of MoS2 QDs and their optical properties as well as biological behaviors is critical for their practical applications, which remain largely unclear. Herein, by adopting a sulfur vacancy modification strategy, a toolbox of MoS2 QDs functionalized with different thiolate ligands was prepared. The effect of surface chemistry on the optical properties of MoS2 QDs was systematically explored by various spectroscopic techniques, revealing the important role of surface ligands in defining their absorption band gap and luminescence quantum yield. Furthermore, cellular experiments showed that the cytotoxicity and intracellular fate (i.e., lysosomal accumulation) of MoS2 QDs are closely related to the properties of surface ligands. Our results underscore the important roles of surface ligands in regulating the properties and biological interactions of these QDs, which will facilitate the future development of MoS2-based materials with precisely controlled functions for biomedical applications.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yu Rao,Kongjun Zhu,Hongcheng Li,Penghua Liang,Hongjuan Zheng,Jiatao Chen,Jie Zhang,Jinsong Liu,Kang Yan,Jing Wang
Hybrid-structured coupling metal dichalcogenides with carbon materials serve as prospective anode materials for lithium-ion batteries (LIBs) due to their high electrical conductivity, rich active sites, and Li + diffusion path for Li + storage. In the present work, graphene-wrapped ZnS−MoS 2 @carbon composites (ZnS−MoS 2 /rGO@C) are synthesized via high-temperature mixing during the hydrothermal and carbonation processes. The as-prepared ZnS−MoS 2 /rGO@C composites display alleviated volume change in the electrochemical process, increased Li + diffusion speed, and improved conductivity, which are caused by the synergic effect of phase boundaries and hierarchical construction. Therefore, the ZnS−MoS 2 /rGO@C composites show superior lithium storage capacity and structure stability, and possess ultrastable cycle (581.0 mAh g −1 after 500 cycles at 1 A g −1 ) and good rate performance (310.7 mAh g −1 at 5 A g −1 ). This work confirms that anode materials with a hybrid structure can be rationally engineered for high-performance LIBs with superior cycle durability and good rate capability.
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