JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·
IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Peisong Dong,Qin Wang,Mingliang Ma
Polyurea (PUA) is widely used as a coating in construction, tunnels, bridges, and other fields because of its excellent performance. However, its combustion emits toxic gases and smoke, hindering escape and posing potential fatality risks. Enhancing the flame retardancy of PUA is crucial for safety and expanding its applications. The synthesis of two-dimensional FePP nanosheets was reported in this paper, employing the solvothermal method, followed by the sequential growth of MoS 2 and Ni-MOF to establish a multilayer composite structure. The elemental composition and morphology of the synthesized FePP@MoS 2 @Ni-MOF flame retardants were characterized and analyzed. The flame retardant properties of polyurea composites with varying amounts of FePP@MoS 2 @Ni-MOF were investigated using Cone calorimeter tests. The results showed that the prepared flame retardant had good thermal stability and significantly improved fire safety properties. The PUA/FePP@MoS 2 @Ni-MOF 3.0 composite exhibited notable improvements compared to pure PUA. Specifically, the peak heat release rate, total heat release rate and peak smoke production rate were reduced by 39.76%, 29.33% and 17.86%, respectively, while total smoke production and total CO production (COP) were reduced by 21.30% and 54.47%. This study provides new insights and experimental basis for the technological development of novel flame retardant coating materials.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Qi Chen,Xingxing Huang,Cheng Liu,Yueling Chen,Jionghua Wu,Jimmy C. Yu,Ling Wu
The attainment of rapid charge mobility and effective N 2 activation is of critical importance for photocatalytic nitrogen fixation but it has always been a challenge. Such challenge may be met by the construction of a Type II MoS 2 nanoparticles/ MIL-100(Fe) heterojunction photocatalyst. The new material possesses charge migration channels that facilitate the separation of photogenerated carriers. This charge redistribution during photocatalysis is confirmed by experimental results showing a decrease of charge density on the Fe species and an increase of that on Mo. Moreover, DFT calculations show that the adsorption of N 2 and H 2 O is more likely to occur on Fe sites and Mo sites, respectively. These findings clearly suggest a drastically improved spatial isolation of reduction and oxidation sites on the photocatalyst as compared to pristine MIL-100(Fe). The optimized MoS 2 /MIL-100(Fe) exhibits a NH 4 + yield rate of 1.29 μmol·h −1 as excellent utilization of photoinduced electron-hole pairs and effective adsorption and activation of N 2 become possible. This work offers an insight on the synergy of heterojunction engineering with coordinated activation for photocatalytic ammonia synthesis.
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Molecular Catalysis
·
2025
·
IF 4.9
Jiani Qin,Jiahao Zhang,Ge Jin,Rong Xu,Chuanyi Wang,Bao Pan
Antibiotic wastewater poses significant environmental risks due to the persistent micropollutants such as tetracycline (TC), which contribute to the development of antibiotic resistance. In this study, cobalt-doped molybdenum disulfide (Co-MoS₂) catalysts were synthesized via the hydrothermal method to enhance peroxymonosulfate (PMS) activation for efficient TC degradation. Comprehensive material characterizations (XRD, FT-IR, SEM, XPS) confirmed the successful incorporation of Co into the MoS 2 lattice, resulting in a mesoporous structure with an increased specific surface area, improved charge transfer efficiency, and greater exposure of active sites. Under optimal conditions, the 3.0%Co-MoS₂ catalyst achieved 81.5% TC degradation within 40 min, with a reaction rate constant 41 times higher than that observed with PMS alone. Key operational parameters-including catalyst dosage, PMS concentration, pH, temperature, and the presence of common anions-were systematically optimized, demonstrating the system’s broad applicability for degrading various micropollutants. Radical trapping and EPR analyses identified •O₂⁻ as the dominant reactive species, while the Co²⁺/Co³⁺ and Mo⁴⁺/Mo⁶⁺ redox cycles were found to facilitate continuous PMS activation. Furthermore, four-cycle stability tests confirmed the catalyst’s excellent reusability and potential for practical antibiotic wastewater treatment. This work validates transition metal-doped sulfides as efficient, stable catalysts for antibiotic micropollutant removal via PMS-based advanced oxidation processes.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Fang Yan,Rong Deng,Shaohui Guo,Xiaochun Li
Excessive pesticide residues have posed a severe risk to human health and ecological environment, making stringent testing of them a crucial step in food safety supervision. Herein, a flexible paper-based SERS platform composited of AgNPs and MoS 2 nanoflowers was developed for the rapid and ultra-sensitive detection of thiram in juice. Among it, the hydrophobic MoS 2 -modified paper was first fabricated, followed by co-depositing small-sized AgNPs and thiram molecules onto its surface for SERS analysis. Owing to the unique petal-like structure and high hydrophobicity of MoS 2 -coated paper, the AgNPs loaded on it was significantly aggregated, thereby generating numerous “hot spots” in the nanogaps between adjacent silver nanoparticles. Simultaneously, thiram molecules were enriched and concentrated within these gaps, resulting in exceptional Raman signal amplification. Compared to single-material substrates, an integrated advantage was acquired with hybridizing of AgNPs and MoS 2 . The performance of this platform was verified by detecting thiram in pear juice using a portable Raman spectrometer, in which the limit of detection (LOD) can be as low as 1.01 ng/mL and its recovery percentages had a good consistency with ones of HPLC-MS/MS. Overall, this Ag/MoS 2 hybrid SERS platform exhibits outstanding stability, sensitivity and feasibility in the label-free detection of pesticides in food. It also provided a universal tool for the on-site monitoring of diverse biochemical molecules across various fields.
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PubMed
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Dawei Gao,Qiaoli Lu,Jiajun Tang,Lili Wang
Norfloxacin (NOR), a common antibiotic, generates substantial wastewater during the production process. This wastewater infiltrates lakes, rivers, and groundwater systems, giving rise to water pollution. It also poses risks of human accidental ingestion. Once entering the human body, NOR may cause damage to organisms and enhance drug resistance, thereby posing a severe threat to human health. NOR has been recognized as an emerging micro-pollutant, and traditional wastewater treatment technologies struggle to efficiently remove it. Therefore, there is an urgent need to develop an effective and environmentally friendly technology for the removal of norfloxacin from water. In this study, a reusable fabric-based highly efficient catalyst, DHCA@MoS 2 @CMCF-Fe, was developed. The research results indicate that under mild stirring conditions, the surface of DHCA@MoS 2 @CMCF-Fe can generate abundant free charges, enabling the efficient activation of peroxomonosulfate (PMS). Moreover, the exposed Mo(IV) active sites in DHCA@MoS 2 @CMCF-Fe effectively accelerate the electron transfer and redox cycle of Fe(II)/Fe(III), ensuring the continuous and efficient activation of PMS. Furthermore, the synergistic effect between MoS 2 and Fe further optimizes the electron conduction pathway, enhancing the efficiency of charge separation and transfer within the system, and enabling the continuous generation of a large number of highly reactive radicals. The degradation rate of NOR by the DHCA@MoS 2 @CMCF-Fe system can reach 95.7 %, which is 102 % higher than that of the DHCA@MoS 2 @CMCF system. In experiments exploring the effects of various inorganic anions on the degradation of NOR, it was found that Cl − and SO 4 2− had relatively minor impacts on NOR degradation. In contrast, HCO 3 − exerted a certain inhibitory effect, causing the degradation rate to decline from 95.7 % to 80 %. To elucidate the degradation mechanism of NOR, quenching experiments and electron paramagnetic resonance (EPR) spectroscopy were conducted. The results confirmed that 1 O 2 and SO 4 − · were the key reactive species dominating the degradation of NOR. Subsequently, a detailed analysis was performed to uncover the catalytic mechanism by which the DHCA@MoS 2 @CMCF-Fe system degrades NOR. Furthermore, after five cycles of reuse, the catalyst maintained high catalytic activity, with the degradation rate of NOR remaining above 85 %. Aiming at the drawbacks of traditional powder catalysts, such as difficult recovery and potential for secondary pollution, this study supported the catalyst on fabric, effectively addressing these issues to the greatest extent. This research not only opens up a new pathway for the application of PMS in the treatment of antibiotic-contaminated water but also fully demonstrates the immense application potential of DHCA@MoS 2 @CMCF-Fe in the removal of organic pollutants, providing novel ideas and directions for the development of environmental remediation technologies.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kayi Shao,Linlong Zhang,Yaping Zhong,Dong Wang
Bacterial infection seriously affects human health, and peroxidase-like (POD-like) nanozymes open up promising avenues for innovative antibacterial strategies beyond traditional antibiotics. In this study, we developed a molybdenum disulfide quantum dot-decorated mesoporous polydopamine nanoparticle (MPM) with highly efficient POD-like catalytic activity, H 2 O 2 production and GSH responsive properties. Molybdenum disulfide quantum dots act as POD-like nanozymes, while mesoporous polydopamine act as a H 2 O 2 generator, GSH consumption agent and nanocarrier. Specifically, MPM could promote the decomposition of overexpressed hydrogen peroxide (H 2 O 2 ) within the bacterial infection microenvironment into hydroxyl radicals (·OH) without the need for external activation, thereby disrupting bacterial structure and function, leading to bacterial death. Additionally, MPM generates H 2 O 2 and consumes GSH, ensuring the persistence and efficacy of ROS-based antibacterial activity. In vitro antibacterial experiments showed that E. coli and S. aureus was inhibited by MPM at rate of 96.3% and 100%, respectively. The antibiofilm experiment further demonstrated that MPM maintained high POD activity and can effectively destroy and inhibit the formation of bacterial biofilm, offering a new strategy for developing antibiotic-free antibacterial methods. In vivo experiments showed that MPM could effectively eliminate bacteria in wound tissues of mice and had a good therapeutic effect on infected wounds. Moreover, MPM exhibits good biosafety, indicating that it has ideal application potential as a highly effective and safe antibacterial agent.
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LANGMUIR
·
2025
·
IF 3.9
Li Xu,Pingyue Hu,Liwen Tan,Junchun Guo,Sheng Li,Xiaoli Xiong
Dopamine (DA) is a key neurotransmitter in the central nervous system, and abnormal concentrations are associated with a variety of diseases. In this study, a novel electrochemical sensor is constructed based on ultrathin P-doped MoS2/MoO2 nanosheets supported on bowl-shaped N-doped carbon hemispheres (N-BCH@P-MoS2/MoO2). The unique hierarchical structure combines the high specific surface area of N-BCH with the enhanced electrocatalytic activity of P-doped MoS2/MoO2, resulting in significant improvements in the performance for DA detection. The electronic structure of the catalyst is further modulated by the codoping of N and P, which increases the electrical conductivity and the number of active centers. The results show that the N-BCH@P-MoS2/MoO2 exhibits excellent sensitivity and selectivity for DA detection, capable of achieving a detection limit as low as 0.12 μM within a broad concentration range (3–100 μM) (S/N = 3). Furthermore, electrocatalysts have been employed in the detection of DA in human serum, indicating significant promise for clinical diagnosis.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lei Dong,Jiacheng Qiu,Jingyi Zhang,Yufei wang,Yan Han,Yang Liu,Dejun Li,Jianmin Feng,Huifen Peng
Potassium-ion batteries (PIBs) display significant potential for large-scale energy storage systems , attributed to their high energy density . Molybdenum disulfide (MoS 2 ), with its high theoretical capacity and 2D layered structure, is an ideal anode material for K + intercalation/deintercalation in PIBs. However, the low electronic conductivity and substantial volume changes during K + insertion/extraction inherently limit the performance of MoS 2 . A plasma-enhanced ball milling process has been employed to synthesize MoS 2 /few-layer graphene (FLG) composites, achieving mechanical exfoliation and MoS 2 -FLG bonding in a single step. The synthesized MoS 2 /FLG composite material significantly benefits from the exceptional electrical conductivity and excellent mechanical properties of FLG. This results in outstanding K + storage performance. Notably, it demonstrates an impressive rate capacity of 184 mAh g -1 at a high current density of 1.6 A g -1 . Additionally, the material exhibits outstanding cyclic stability, maintaining a capacity of 323 mAh g -1 over 200 cycles at a current density of 0.1 A g -1 . The mechanism of the conversion reaction of MoS₂ during the electrochemical cycling process has been elucidated through ex situ X-ray photoelectron spectroscopy (XPS). More importantly, this research introduces an effective strategy for synthesizing multi-component composites, where plasma facilitates material exfoliation and binding between different components.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
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IF 4.7
Haozhe Pang,Shimao Shangguan,Ya Chen,Yue Zhang,Siyuan Fan,Lida Shen,Zongjun Tian,Zhidong Liu
Bronze, as a solid self-lubricating material, is widely used in various frictional applications. However, under increasingly common high-frequency and high-load conditions, particularly in the absence of lubricants, bronze layers are prone to rapid wear. Incorporating MoS 2 particles to fabricate solid self-lubricating composite coatings is considered a promising approach to improve overall performance in harsh environments. In this study, a friction-assisted jet electrodeposition process is employed to fabricate Cu-Sn-MoS 2 composite coatings. This technique enhances particle embedding and surface leveling, producing uniform and dense coatings with significantly improved tribological performance. The methodological framework of this study involves the fabrication of Cu-Sn-MoS 2 composite coatings via friction-assisted jet electrodeposition, followed by systematic characterization of their surface morphology, microhardness, adhesion, and tribological behavior. The results show that a MoS 2 content of 5 g/L provides a uniform and compact surface with fine grains, sufficient microhardness and adhesion strength, and a continuous lubricating film formed during wear. The wear mechanism was revealed to explain why the Cu-Sn-MoS 2 coating exhibited a strong performance in mechanical properties and wear resistance. This content achieves the lowest friction coefficient and the best wear resistance among all tested compositions.
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Chinese Physics B
·
2025
·Vol. 34
·期 11
·117304
·
IF 1.5
Wen Zhang,Mingyang Gao,Jun Guo,Licun Fu,Ling Liu,Jing Wang,Teng Ma
Ultrasound is a powerful tool in materials processing, yet its application in constructing van der Waals (vdW) heterostructures remains under-explored. In this study, MoS2 and graphene — two widely studied 2D materials — were successfully assembled into vdW heterostructures via a convenient ultrasound-driven self-assembly approach. The morphology of the heterostructures was characterized by scanning electron microscopy (SEM), while their structural and compositional features were confirmed through x-ray diffraction (XRD), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS). Red-shifted Raman peaks and decreased binding energies in XPS spectra provided strong evidence of successful heterostructure formation. A three-stage assembly mechanism — comprising dispersion, assembly, and adjustment — is proposed, with acoustic cavitation playing a key role in driving the process. This study not only demonstrates the feasibility of synthesizing 2D heterostructures via an ultrasonic route but also lays a foundation for future scalable, energy-efficient fabrication strategies.
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ENERGY & FUELS
·
2025
·
IF 5.3
Jingjing Zhu,Yuying Feng,Jia hui Jiang,Tingting Huang,Juan Xiao,Qihao Wu,Guancheng Xu,Li Zhang
In recent years, the technology of electrocatalytic water splitting for hydrogen production has garnered significant interest. Nonetheless, the kinetics associated with the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are comparatively sluggish, thereby constraining the enhancement of water decomposition efficiency to a certain degree. In this paper, the Ni3S2-MoS2/ NF semicoherent heterostructure interface electrocatalyst with multistage nanosheet was synthesized by the hydrothermal method. At the material level, the structure adeptly incorporates a semicoherent interface with a multilayer nanosheet configuration. This design not only preserves the nanosheet morphology of the precursor but also facilitates the formation of folded nanoflowers, thereby increasing the active surface area and promoting the rapid transfer of electrons. Furthermore, it optimizes the electronic environment of the electrode through interface charge redistribution, thereby diminishing the adsorption of H by the strong S–H bonds and accelerating the reaction kinetics. Additionally, the structure achieves optimal lattice matching, which enhances ion diffusion and reduces the associated diffusion barrier. In a 1.0 M KOH solution, the catalyst showed excellent performance in both the OER and HER. In situ Raman spectroscopy demonstrated that Ni–OOH serves as the true active site for the OER. This study provides a new idea for the precise design of bifunctional HER and OER electrocatalysts.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ting Zhang,Yumeng Liu,Qingqing Wu,Lu Zhou,Hongxia Liang,Yi Lu,Mengmeng Dong,Ningning Liu
The detection and discrimination of biothiols are of great significance for tumor cell identification and clinical diagnosis. Recently, nanozymes have been employed to construct biosensor arrays for the determination and differentiation of biothiols. However, most nanozymes currently used are peroxidase-like enzymes, which require highly toxic and unstable hydrogen peroxide (H 2 O 2 ) as a co-substrate to generate reactive oxygen species. Herein, MoS 2 @Pd nanozymes with good Pd dispersion were prepared by in situ growing Pd nanoparticles on MoS 2 nanosheets obtained via liquid-phase exfoliation. This strategy is green, mild, aqueous, and does not require additional reducing agents. Benefiting from the dispersion of Pd active sites and the electronic metal–support interaction, MoS 2 @Pd exhibits superior oxidase catalytic activity, which can effectively trigger the oxidation of the chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) and induce changes in optical absorption. Based on the inhibitory effect of thiols on the chromogenic system, the constructed biosensor can be successfully applied for the sensitive analysis of common thiols. More importantly, the three absorption peaks generated by oxidazed TMB at 370 nm, 450 nm, and 652 nm can serve as three colorimetric channels. Through pattern recognition methods, good differentiation effects can be achieved for biothiols and their mixtures, and successful identification and differentiation of liver cancer cells have been realized. Therefore, MoS 2 @Pd nanozyme provide an easy and cost-effective method, offering new ideas for the construction of sensor arrays and the effective recognition of biothiols and cancer cells.
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