JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Zhenhe Wang,Xuemei Wang,Guangyu Qi,Shihao Chen,Cong Liu,Giovanna Marrazza,Shuang Gu,Pei Li,Wei Chen
Total volatile basic nitrogen (TVB-N) is a significant indicator for meat freshness evaluation. In this study, a simple hydrothermal method was utilized to synthesize the nanoporous graphene oxide/ molybdenum disulfide (NGO/MoS 2 ) nanocomposites. The optimum detection effect of the polymerization process was optimized by using different proportions of NGO in the solution, and the NGO/MoS 2 based quartz crystal microbalance (QCM) gas sensor was used to detect TVB-N in salmon meat for assessing its freshness. The NGO/MoS 2 composites with different mass ratios were synthesized by hydrothermal method, and were characterized by FT-IR, Raman, XPS, SEM and TEM. The results showed that NGO/MoS 2 had both functional groups on graphene oxide (GO) surface, marginal sites and active sites of MoS 2 . The NGO/MoS 2 based QCM gas sensor was highly sensitive to TVB-N gases such as trimethylamine, dimethylamine and ammonia. Compared with other gases, NGO/MoS 2 sensor had higher selectivity to TVB-N gases. The high responses of NGO/MoS 2 based sensor to TVB-N gases were attributed to the positive synergistic effect of the porous structure, surface functional groups and high specific surface area of NGO and MoS 2 . Finally, the sensor has been applied for predicting salmon meat freshness.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xuecheng Cao,Minghui Cui,Kaiqi Fang,Liting Yan,Hongyu Gong,Yu Zhang,Xiangjun Zheng,Ruizhi Yang
Rechargeable non-aqueous lithium-oxygen batteries (LOBs) have garnered increasing attention owing to their high theoretical energy density. However, their slow cathodic kinetics hinder efficient battery reactions. Nanoscale catalysts can effectively enhance electrocatalytic activity and atomic utilization efficiency. However, the agglomeration of nanoscale catalysts (such as cluster and single atoms) during continuous discharge/charge cycles leads to decreased electrochemical performance and poor cyclic stability. Herein, the ruthenium (Ru) atomic sites anchored on an O-doped molybdenum disulfide (O-MoS 2 ) catalyst (designated as Ru/O-MoS 2 ) was fabricated using a facile impregnation and calcination method. Strong Ru-O coupling between Ru atoms and the O-MoS 2 substrate optimizes the localized electronic structure, resulting in improved electrochemical performance and enhanced resistance to Ostwald ripening. When employed as a cathode catalyst for LOBs, Ru/O-MoS 2 catalyst exhibits a high reversible specific capacity (18700.5 (±59.8) mAh g −1 ), good rate capability, and enhanced long-term stability (115 cycles, 1200 h). This study encourages facile and efficient strategies for the development of effective and stable electrocatalysts for use in LOBs.
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MICROCHIMICA ACTA
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2018
·Vol. 185
·期 6
·1-8
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IF 5.705
Huang Huayu,Wang Mingxia,Wang Yang,Li Xinli,Niu Zhiying,Wang Xingyu,Song Jinxi
Molybdenum disulfide (MoS 2 ) was used as an electrically conductive skeleton and functionalized with an ionic liquid and gold/silver nanorods. The resulting composite was characterized by scanning electron microscopy, transmission electron microscopy and UV–vis spectroscopy. The composites were used to modify a glassy carbon electrode (GCE) to obtain a sensor for 2,4-dichlorophenol (2,4-DCP). The results show that the oxidation power and electrocatalytic activity of the modified GCE towards 2,4-DCP are enhanced compared to a bare GCE and other modified GCEs. Response is linear in the 0.01 to 50 μM 2,4-DCP concentration range, with a 2.6 nM detection limit. The sensor is highly sensitive and long-term stable. It was successfully applied to the determination of 2,4-DCP in spiked water samples and gave satisfactory recoveries.
Schematic of an electrochemical sensor for the differential pulse voltammetric (DPV) determination of 2,4-dichlorophenol. It is based on the use of an MoS 2 -ionic liquid-Au/Ag nanorod composite.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Wendong Zhu,Maoqiang Chi,Mu Gao,Ce Wang,Xiaofeng Lu
Synergistic effects play a crucial role in improving the catalytic activity of enzyme-like reactions. The preparation of hybrid nanomaterials for enzyme mimicking that display synergistic enhanced catalytic activity remains a formidable challenge. Titanium dioxide (TiO 2 )/molybdenum disulfide (MoS 2 ) core-shell hybrid nanofibers were synthesized as efficient peroxidase mimics via a three-step approach involving electrospinning, calcination, and hydrothermal treatment. The resulting TiO 2 /MoS 2 hybrid nanofibers exhibited synergistically enhanced peroxidase-like catalytic activity relative to the TiO 2 nanofibers or MoS 2 nanosheets alone. Based on the high peroxidase-like activity of the TiO 2 /MoS 2 hybrid nanofibers, a simple colorimetric approach for the detection of l -glutathione (GSH) was developed, with a detection limit as low as 0.05 μM. This study provides a simple and sensitive sensing platform for the detection of GSH, with prospective applications in colorimetric sensing, environmental monitoring, and medical diagnosis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Shanyi Zhu,Jia Qiao,Mingliang He,Binghua Zhou,Guobing Zhou,Gan Jet Hong Melvin,Mingxi Wang,Hironori Ogata,Shuwen Wang,Yoong Ahm Kim,Morinobu Endo,Zhipeng Wang
The practical application of layered molybdenum disulfide (MoS 2 ) cathodes in aqueous zinc-ion batteries (AZIBs) is limited by narrow interlayer spacing, poor conductivity of the semiconducting two-layer hexagonal phase, and structural degradation during cycling. Developing an integrated strategy that can simultaneously improve ion transport, electron conduction, and structural stability remains a key challenge. Herein, we report a combined sodium ion (Na + ) preintercalation and three-dimensional (3D) honeycomb carbon (HC) confinement system to regulate the intrinsic properties and external architecture of MoS 2 . The preintercalated Na + acts as structural pillars, expanding the interlayer distance from 0.62 nm to 0.89 nm and stabilizing the metallic one trigonal phase with improved hydrophilicity and conductivity. Concurrently, the bicontinuous HC framework serves as a conductive and robust matrix that alleviates volume variation, suppresses nanosheet restacking, and facilitates charge transport. The resulting Na–MoS 2 @HC cathode exhibits strong rate capability and stable cycling performance, maintaining high reversible capacities at current densities of 2 and 5 A g −1 , and 99.3% capacity retention after 2000 cycles at 5 A g −1 . Kinetic analysis indicates a dominant pseudocapacitive contribution, while density functional theory calculations show a substantially reduced Zn 2+ diffusion barrier. Ex situ characterizations further confirm a reversible Zn 2+ insertion–extraction process. The assembled quasi-solid-state battery shows good flexibility and stable electrochemical performance, indicating the practical potential of this material design. Overall, our study shows that synergistic coengineering of interlayer spacing and phase structure provides a practical route for developing high-performance layered cathodes for AZIBs. This work proposes a synergistic strategy that employs Na+ preintercalation and three-dimensional honeycomb carbon confinement to expand the interlayer spacing of MoS2, stabilize its metallic 1 T phase, and enable ultrafast, highly reversible pseudocapacitive Zn2+ storage, delivering exceptional capacity and cyclability for advanced quasi-solid-state zinc-ion batteries. Download: Download high-res image (262KB) Download: Download full-size image
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ACS Applied Electronic Materials
·
2023
·
IF 4.7
Qingyue Xu,Wenjing Li,Qi Qi,Ying Guo
Respiration is an important physiological signal that can be used to monitor human health and activity. This study presents a high-performance inorganic composite-based humidity sensor for respiration monitoring. The sensor is composed of a 3D nanostructure of ZnGa-layered double hydroxide (ZnGa-LDH) growing in situ on negatively charged MoS2 wafers, obtained by co-precipitation. By adjusting the MoS2 content, the resulting ZnGa-LDH/MoS2 composite displays a 3D “house of cards” structure with a larger surface area than pure ZnGa LDH or MoS2. The sensor exhibits nearly 3 orders of magnitude impedance change from the humidity range of 11% to 95% RH, fast response/recovery time of 1.5/5 s, hysteresis difference of 2.93%, and long-term stability and high repeatability. The optimized humidity sensor can distinguish between different breathing patterns, as well as the breathing rate/depth of the subject. The conductive mechanism of the material has also been analyzed by combining with the complex impedance curve of the material. This study not only provides an easy approach to adjust the hydrophilic/hydrophobic surface of the materials to control the humidity sensing ability but also develops a humidity sensor that can reflect the breathing conditions of the human body, potentially having applications in respiratory monitoring.
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Nanomaterials
·
2022
·Vol. 12
·期 11
·1865
·
IF 5.719
Weiwei Zhang,Zhao Kuang,Ping Song,Wanzhen Li,Lin Gui,Chuchu Tang,Yugui Tao,Fei Ge,Longbao Zhu
Photothermal therapy has been widely used in the treatment of bacterial infections. However, the short photothermal effective radius of conventional nano-photothermal agents makes it difficult to achieve effective photothermal antibacterial activity. Therefore, improving composite targeting can significantly inhibit bacterial growth. We inhibited the growth ofStaphylococcus aureus(S. aureus) by using an extremely low concentration of vancomycin (Van) and applied photothermal therapy with molybdenum disulfide (MoS2). This simple method used chitosan (CS) to synthesize fluorescein 5(6)-isothiocyanate (FITC)-labeled and Van-loaded MoS2-nanosheet hydrogels (MoS2-Van-FITC@CS). After modifying the surface, an extremely low concentration of Van could inhibit bacterial growth by trapping bacteria synergistically with the photothermal effects of MoS2, while FITC labeled bacteria and chitosan hydrogels promoted wound healing. The results showed that MoS2-Van-FITC@CS nanosheets had a thickness of approximately 30 nm, indicating the successful synthesis of the nanosheets. The vitro antibacterial results showed that MoS2-Van-FITC with near-infrared irradiation significantly inhibitedS. aureusgrowth, reaching an inhibition rate of 94.5% at nanoparticle concentrations of up to 100 µg/mL. Furthermore, MoS2-Van-FITC@CS could exert a healing effect on wounds in mice. Our results demonstrate that MoS2-Van-FITC@CS is biocompatible and can be used as a wound-healing agent.Keywords:MoS2nanosheet;antibacterial activity;photothermal therapy;wound-healing
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Liao Xu,Yang Gu,Yaoyi Li,Huaizhi Liu,Yangyang Shang,Yinyan Zhu,Bo Zhou,Lihua Zhu,Xiaoqing Jiang
Hypothesis Recently, molybdenum disulfide (MoS 2 ) as a new type of catalyst, has been used for hydrogen evolution . In order to overcome the shortcomings of MoS 2 , such as poor conductivity and lack of catalytic activity sites, various materials were added to prepare composites, such as graphene with good conductivity. Experiments In this work, we combined MoS 2 with graphene through a very simple liquid-phase salt-assisted co-exfoliation method. The obtained MoS 2 /graphene nano-composites have been further applied to electrocatalyst of hydrogen evolution reaction. The influences of different ratio of MoS 2 to graphene and different solvents of exfoliation on the electrocatalytic activity for the hydrogen evolution reaction have been investigated in detail. Findings In general, the obtained MoS 2 /graphene nano-catalysts exhibits the smallest Tafel slope of 61 mV/dec with the exfoliation solvent of isopropanol, and 65 mV/dec in N-methyl pyrrolidone. All the MoS 2 /graphene composites exhibit much better catalytic activity than either MoS 2 or graphene single substance due to the synergetic effect between MoS 2 and graphene nanosheets .
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POLYMER COMPOSITES
·
2018
·Vol. 40
·期 6
·2244-2257
·
IF 1.943
Lingfeng Xu,Xinwen Tan,Ruijie Xu,Jiayi Xie,Caihong Lei
Molybdenum disulfide (MoS 2 ) with two-dimensional (2D) lamellar structure was functionalized with melamine-cyanuric acid (MCA) hybrids via a facile way. A core-shell composite particle (MoMA) was obtained. Acting as one kind of synergistic flame retardant, it was mixed with traditional intumescent flame retardant (IFR) to prepare the flame retardant poly(lactic acid) composites by melt blending. UL-94 V-0 rating and LOI value of 29.8% for PLA composites were achieved while the total amount of flame retardants was 12 wt%, with the optimal weight ratio of IFR to MoMA 3:1. The inclusion of MoMA can enhance the amount of char residue and suppress the pyrolysis rate. The thermal degradation kinetic studies indicated that more pyrolysis conversion energy was needed. Finally, the investigation of char residue further confirmed that the addition of MoMA can improve the continuity and thermal stability of intumescent char layer and promote its graphitization degree. The condensed phase mechanism was mainly responsible for the improved flame retardant performance. This work suggests a novel strategy for improving flame retardant performance of PLA by combination of MoMA with IFR. The mechanical properties were studied as well. POLYM. COMPOS., 40:2244–2257, 2019. © 2018 Society of Plastics Engineers
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Yuanqing Sun,Junbin Tan,Huihui Lin,Xiaojie Wang,Jian Liu,Yunxing Li,Chuanxi Wang
Semiconductor photocatalysts is a promising approach to combat both environmental pollution and global energy shortage despite the challenges of recycling and stability. In this paper, magnetic Fe 3 O 4 particle is introduced in the system and Fe 3 O 4 /TiO 2 /MoS 2 heterostructures can be formed in a facile strategy. The morphology and structure of Fe 3 O 4 /TiO 2 /MoS 2 can be controlled by adjusting the hydrolysis rate of the titanium source. MoS 2 is designed to fill in the mesoporous of TiO 2 core, forming heterojunction on the surface and near-surface of TiO 2 under solvothermal conditions. With respect to the decomposition of a rhodamine B (RhB) solution under visible light , the Fe 3 O 4 /TiO 2 /MoS 2 heterostructures display highly photocatalytic activities in aqueous solutions, and they can be easily recovered to realize cyclic utilization by applying an external magnetic field. Thus, the effective magnetic recycle of the catalyst is achieved, and high visible light catalytic activity is ensured simultaneously. Since the current method is simple and flexible to create recyclable catalysts with high stability in this way, it could promote the practicability of semiconductor photocatalysts in water treatment, degradation of dye pollutants, and environmental cleaning.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Guiyun Deng,Feifan Lu,Shuojun Li,Yuying Long,Jianghong Wu,Xiaofeng Guo,Chunyin Li,Zhiyong Song,Mohamed F. Foda,Fang Ding,Heyou Han
Citrus Huanglongbing (HLB) poses an enormous challenge to Citrus cultivation worldwide, necessitating groundbreaking interventions beyond conventional pharmaceutical methods. In this study, we propose molybdenum disulfide-chitosan nanoparticles (MoS 2 -CS NPs) through electrostatic adsorption, preserving the plant-beneficial properties of molybdenum disulfide (MoS 2 ), while enhancing its antibacterial effectiveness through chitosan modification. MoS 2 -CS NPs exhibited significant antibacterial efficacy against RM1021 , and the closest relatives to Candidatus Liberibacter asiaticus ( C Las), Erwinia carotovora , and Xanthomonas citri achieved survival rates of 7.40 % ± 1.74 %, 8.94 % ± 1.40 %, and 6.41 % ± 0.56 %, respectively. In vivo results showed, C Las survival rate of 10.42 % ± 3.51 %. Furthermore, treatment with MoS 2 -CS NPs resulted in an increase in chlorophyll and carotenoid content. Concomitantly, a significant reduction in malondialdehyde (MDA), soluble sugar, hydrogen peroxide (H 2 O 2 ), and starch contents was also observed. Mechanistically, MoS 2 -CS NPs enhanced the activity of antioxidant-related enzymes by upregulating the expression of antioxidant genes, thereby galvanizing the antioxidant system to alleviate oxidative stress. Collectively, this dual functionality—combining direct antibacterial action with the activation of plant defense mechanisms—marks a promising strategy for managing Citrus Huanglongbing and suggests potential agricultural applications for MoS 2 -based antibacterial treatments.
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JOURNAL OF CHROMATOGRAPHY A
·
2017
·
IF 3.981
Fanpeng Ran,Hongmei Liu,Xiaoqi Wang,Yong Guo
A novel material consisting of molybdenum disulfide (MoS 2 ) nanosheet that self-assemble into flower-like microspheres which aggregate to form a monolithic matrix with a micro or nano-scaled mesopore structure was successfully synthesized and used as an efficient sorbent for solid-phase extraction (SPE) due to its large specific adsorption area and good stability. The extraction properties of the as-prepared sorbent were evaluated by high-performance liquid chromatography with variable wavelength detection (HPLC-VWD) by analyzing four flavonoids (apigenin, quercetin, luteolin, and kaempferol). Under optimal conditions, the LODs and LOQs were found to be in the ranges of 0.1–0.25 and 0.4–0.5 μg L −1 , respectively, and wide linear ranges were obtained with correlation coefficients ( R ) ranging from 0.9991 to 0.9996. Compared with commercial C18 and Alumina-N sorbents, the as-prepared sorbent showed high extraction efficiency at different concentrations of flavonoids. After 100 uses, the extraction ability of the self-assembled MoS 2 nanosheet monolithic sorbent had no evident decline, denoting a long service life. Finally, the SPE-HPLC-VWD method using the as-prepared sorbent was applied to flavonoid analysis in beverage samples with satisfactory results.
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