ELECTROCHIMICA ACTA
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2019
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IF 5.383
Junying Huang,Mengting Chen,Xiaojun Li,Xiaowen Zhang,Liyun Lin,Weipeng Liu,Yingju Liu
Molybdenum disulfide (MoS 2 ), although considered as a promising transition metal dichalcogenides catalyst, owns low plane conductivity that limits its effective application. In this work, we grew monodispersed MoS 2 nanoflakes on reduced graphene oxide (rGO), and then assembled the resulting MoS 2 -rGO with carbon nanotubes (CNTs) in a layer-by-layer manner to form the MoS 2 -rGO-CNTs composite. The CNTs spacing layer not only reduces the whole catalytic material's resistance by bridging different broken MoS 2 -rGO nanosheets , but also constructs a three-dimensional structure to prevent 2D MoS 2 -rGO nanosheets restacking and thus increases the active sites. Such three-dimensional MoS 2 -rGO-CNTs catalyst exhibited a low Tafel slope of 39 mV dec −1 and a high current density of 1200 mA cm −2 at −400 mV. Therefore, our study showed a cheap and simple method to combine three-dimensional hybrid material, facilitating the large-scale application of non-noble catalyst.
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BIOSENSORS & BIOELECTRONICS
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2018
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IF 8.173
Wei Zhang,Zhichao Dai,Xue Liu,Jimin Yang
A high-performance sensing platform based on poly-xanthurenic acid (PXA) film functionalized MoS 2 nanosheets was developed for electrochemical detection of circulating tumor DNA in peripheral blood. The MoS 2 nanosheets were obtained using a simple ultrasonic method from bulk MoS 2 . The physical adsorption between MoS 2 and aromatic XA monomers effectively improved the electropolymerization efficiency, accompanied with an increased electrochemical response of PXA. The obtained PXA/MoS 2 nanocomposite not only served as a substrate for DNA immobilization but also reflected the electrochemical transduction originating from DNA immobilization and hybridization without any complex labelling processes or outer indicators. The immobilization of the probe ssDNA was achieved via noncovalent assembly due to the π–π interaction between PXA and DNA bases. After the hybridization of the probe ssDNA with the target DNA, the formation of helix structure induced the resulted dsDNA to be released from the surface of the PXA/MoS 2 nanocomposite. The detection limit of this constructed DNA biosensor was calculated in the linear target DNA concentrations range from 1.0 × 10 –16 mol/L to 1.0 × 10 -10 mol/L and it was found to be 1.8 × 10 –17 mol/L.
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JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 12
·9340-9349
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IF 2.993
Pan Haifeng,Shen Qi,Zhang Zinan,Yu Bihao,Lu Yushi
In the present work, a fire-blocking coating consisting of chitosan and molybdenum disulfide (MoS 2 ) was firstly deposited onto flexible polyurethane (FPU) foam by the layer-by-layer assembly technique. With the MoS 2 -filled coating, the FPU foam could burn without melt dripping during the whole combustion and keep its shape after combustion, while the pure foam was consumed completely. The analysis by thermogravimetric analysis/infrared spectrometry indicated that MoS 2 -filled coating could obviously reduce the amount of organic gaseous pyrolysis products and toxic volatiles during thermal decomposition of the foam. The cone calorimeter results indicated that the FPU foam with 8.5 wt% coating showed great reduction in peak of heat release rate (70%), peak smoke production rate (62.4%) and total smoke released (33.3%). Such a significant improvement in flame-retardant and the smoke suppression properties for FPU foam could be attributed to the protective effect of MoS 2 -filled coating.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Ling Li,Xue Zhang,Dongyang Wang,Wenming Zhang,Xiaowei Li,Xiaohui Zhao,Qinghua Zhang,Lin Gu,Ze Yu,Mingxing Wu
Molybdenum sulfide/carbon nanofibers (MoS 2 /CNFs) composite with high density of flower-like nanosheets are prepared via the combination of electrospinning technology and hydrothermal method . The MoS 2 /CNFs composite exhibits good performance as a counter electrode (CE) in dye-sensitized solar cells (DSSCs). The DSSCs employing MoS 2 /CNFs delivers a power conversion efficiency (PCE) of 8.46%, which is higher than that of the devices with CNFs CE (6.59%) and platinum CE (7.65%) under the same conditions. Thus, the excellent stability and facile preparation of the MoS 2 /CNFs electrode provide precondition for DSSCs application, while greatly enhancing the electrocatalytic activities of the DSSCs.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Yongkang Liu,Bin Hu,Shide Wu,Minghua Wang,Zhihong Zhang,Bingbing Cui,Linghao He,Miao Du
We have explored a nanocomposite composed of a bimetallic CoNi-zeolitic imidazole framework embedded by MoS 2 nanosheets (MoS 2 @CoNi-ZIF), as a bifunctional electrocatalyst for non-Pt methanol oxidation reaction (MOR) and overall water splitting in an alkaline solution. The series of MoS 2 @CoNi-ZIF nanocomposites exhibit different catalytic activities. Significantly, the MoS 2 @CoNi-ZIF nanosheet with a ratio of MoS 2 :CoNi-ZIF = 3:1 (MoS 2 @CoNi-ZIF(3-1)) shows the excellent electrocatalytic activity for MOR, affording an oxidation potential at 1.6 V, also with high catalytic current density and durability. Moreover, the MoS 2 @CoNi-ZIF(3-1) nanocomposite shows a superior electrocatalytic performance toward HER and OER. When the MoS 2 @CoNi-ZIF(3-1) was applied as the bifunctional catalyst for both the anode and cathode, the voltage applied to a two-electrode cell is 1.55 V to achieve a current density of 10 mA cm −2 for overall water splitting. This work provides a promising electrocatalyst for developing high-performance non-Pt-based clean energy and fuel cells in alkaline solution.
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SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Kai Chen,Wentao Zhang,Yuhuan Zhang,Lunjie Huang,Rong Wang,Xiaoyue Yue,Wenxin Zhu,Daohong Zhang,Xu Zhang,Ying Zhang,Jianlong Wang
Although the salt-adjusted properties of nanomaterials have been extensively used for colorimetric assays of all kinds of analytes, their applications in the design of fluorescence sensor are very limited. Herein, a novel fluorescence aptasensor was developed for the sensitive determination of Bisphenol S (BPS) by the salt-adjusted fluorescence resonance energy transfer (FRET) between the zero-dimensional emitter (CQDs) and the two-dimensional absorber (MoS 2 nanosheets) and the roles of specific discrimination and protective effect of anti-BPS aptamer to layered MoS 2 . It is shown that layered MoS 2 can serve as a good fluorescent quencher towards carbon dots with decent quenching efficiency. Importantly, the established fluorescent method achieved satisfactory results for the determination of BPS with a good linear correlation from 0.05 μM to 2 μM and a detection limit of 2 nM. It is expected that this method may offer a new direction for the application of the phenomenon of salt-assisted aggregation of nanomaterials in designing high-performance fluorescent biosensors.
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TALANTA
·
2025
·
IF 6.1
Mingjiang Huang,Binbin Luo,Shengxi Wu,Miwan Shi,Yan Liu,Shenghui Shi
A D-Shaped, excessively tilted fiber grating (ExTFG) immunosensor modified with molybdenum disulfide (MoS 2 ) was developed for label-free and specific detection of growth-stimulated expressed gene 2 protein (ST2), a critical biomarker for heart failure. The D-Shaped ExTFG sensor was fabricated by side-polishing an ExTFG along its slow axis to enhance refractive index (RI) sensitivity. It was subsequently biofunctionalized with MoS 2 and anti-ST2 monoclonal antibodies (anti-ST2 MAbs) for ST2 immunoassays. The RI sensitivities of the sensor after side-polishing and MoS 2 coating were thoroughly investigated. Additionally, the immunodetection properties of the sensor were evaluated across varying concentrations of ST2 antigen solutions, as well as its specificity and clinical performance in serum samples from healthy individuals and patients. Experimental results revealed that the sensitivity of the MoS 2 -modified D-Shaped ExTFG immunosensor for ST2 reached 0.335 nm/[log(mg/mL)] over a wide linear testing range of 1 ng/mL to 1000 ng/mL, with a detection limit of 0.472 ng/mL. This represents an improvement of approximately 86 % compared to the ExTFG without D-Shaped modification and demonstrates excellent specificity for ST2 biomarkers even in complex clinical sera. The MoS 2 -modified D-Shaped ExTFG immunosensor exhibits notable advantages, including stability, practical usability, and high clinical specificity, making it a promising candidate for biomedical and other analytical applications.
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Nanoscale
·
2024
·
IF 5.8
Maoyuan Li,Zhongrui Yu,Zulin Sun,Yuchen Liu,Simiao Sha,Jiancheng Li,Riyue Ge,Liming Dai,Bin Liu,Qingqiao Fu,Wenxian Li
Electrocatalyst materials play a crucial role in determining the efficiency of the hydrogen evolution reaction (HER), directly influencing the overall effectiveness of energy conversion technologies. Ni3S2/MoS2 heterostructures hold substantial promise as bifunctional catalysts, owing to their synergistic electronic characteristics and plentiful active sites. However, their catalytic efficacy is impeded by the relatively elevated chemisorption energy of hydrogen-containing intermediates, which constrains their functionality in different pH environments. In order to mitigate this limitation, trace amounts of Pt are introduced into the heterostructure, intending to enhance electronic transport and refining chemisorption energies, thereby facilitating significant enhancements in both HER and oxygen evolution reaction (OER) activities over a wide pH range. It is revealed that the Pt-modified catalyst achieves exceptional HER performance, requiring merely 64 mV and 83 mV overpotentials to attain a current density of 100 mA cm−2 in acidic and alkaline media, respectively. Furthermore, theoretical simulations corroborate that Pt modification optimizes local electronic configurations and augments electronic transfer, contributing to its superior catalytic performance. This investigation underscores the pivotal role of Pt modification in propelling the practical application of Ni3S2/MoS2 heterostructures as highly efficient and pH-universal bifunctional catalysts.
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FOOD CHEMISTRY
·
2025
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IF 9.8
Yudie Sun,Kehong Quan,Ruilai Zhang,Aobo Feng,Mingfu Ye,Kui Zhang
Methicillin-resistant Staphylococcus aureus (MRSA) is a ubiquitous foodborne pathogen capable of causing food poisoning and producing enterotoxins in foodstuffs, which ultimately results in various illnesses, such as vomiting, diarrhea, and pneumonia. In this study, we present a MoS 2 NF@AuNPs enhanced electrochemiluminescence (ECL) biosensor for MRSA detection based on a DNA branching tree structure formed via enzyme-free hybridization chain reaction (HCR) amplification. This approach integrates bacterial aptamers with multistage HCR amplification to achieve highly sensitive and specific target recognition. Furthermore, MoS 2 NF@AuNPs act as a synergistic catalyst for Ru(bpy) 3 2+ molecules, which in turn substantially enhances the signal readout of the biosensor. The biosensor exhibits a robust linear correlation for MRSA detection over a concentration range of 10 0 to 10 7 cfu/mL, with a detection limit of 1 cfu/mL. In addition, the biosensor demonstrates excellent selectivity and high sensitivity when applied to real samples such as water, juice, and milk.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Li Gong,Yijiao Zhang,Renlong Liu,Zuohua Liu,Siwei Jin,Li Zhang,Tengda Zhao,Huanbao Fa,Wei Yin
Due to the toxicity and corrosiveness of the ammonia gas, low-cost, portable, and accurate methods of ammonia detection are of great importance in environmental testing and disease diagnosis. In this study, flower-like UIO-66-NH 2 @MoS 2 composite modified screen-printed electrodes (SPEs) were prepared by hydrothermal treatment using ionic liquids [BMIM][BF 4 ] as electrolytes. The UIO-66-NH 2 @MoS 2 /SPEs were then combined with a miniature electrochemical workstation to construct a novel electrochemical ammonia sensor. The experimental results showed that UIO-66-NH 2 @MoS 2 had excellent adsorption capacity for ammonia, exhibiting good linearity in the range of 5–500 ppm with a low limit of detection (2.1 ppm) and a fast response time for 100 ppm ammonia (13 s). This sensor also possessed excellent stability, reproducibility, and anti-interference ability. The synthesized UIO-66-NH 2 @MoS 2 nanocomposite was demonstrated to be an excellent candidate for the construction of high-performance ammonia sensors for various applications.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 11
·6329-6340
·
IF 10.7
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Yexin Tian,Zhixiao Liu,Zhongchao Wang,Lezhi Yang,Fei Han
A single two-dimensional material often struggles to satisfy all the performance requirements of electrode materials for sodium-ion batteries. However, constructing a hierarchical heterogeneous two-dimensional stacking structure can effectively combine the advantages of multiple materials and make up for the insufficiency of a single element. This work applied a pre-intercalation–sulphuration concept and liquid-phase coating modification by constructing a hierarchical nano-flake/micro-lamellar complex structure. In this composite material, MoS2 nanosheets and V2C MXene layers overlap and interact to prevent nanoparticle agglomeration and micron flakes collapse simultaneously. The MoS2/MXene hierarchical structure is sandwiched between ultrathin and dense carbon layers to form a multifaceted conductive skeleton and a twofold protection mechanism. The coating reduces the electrolyte contact area and prevents the escape of polysulfide byproducts. Accordingly, the designed MSVC@C demonstrates superior Na+ storage capacities (612.4 mA h g−1 at 0.5 A g−1 after 600 cycles) and outstanding rate performance (304.42 mA h g−1 at 10 A g−1). Experimental results and theoretical calculations verify that the MoS2 and V2C heterostructure promotes the electrochemical performance owing to the better electronic conductivity and lower ion diffusion energy barrier. Moreover, this structure optimization strategy applies to various MXene guests (e.g., V2C and Nb2C) to prepare a variety of hierarchical nano–micro structures that are expected to be promising two-dimensional electrode materials for SIBs with application prospects in the future.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shunchao Wang,Xin Pang,Dequan Huang,Man Zhang,Sijiang Hu,Youguo Huang,Fenghua Zheng,Hongqiang Wang,Qingyu Li,Qichang Pan
Cobalt sulfide (Co 9 S 8 ) is a promising anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, cost-effectiveness, and environmental friendliness. Unfortunately, the inevitable structural deterioration induced by the huge volume changes during the discharge/charge cycles leads to poor cycle performance and rate capability when evaluated as the anode material for SIB. Herein, we designed a Co 9 S 8 @C-MoS 2 heterostructure with abundant heterointerface and hollow structure. In the designed hybrid architecture, the self-supporting hollow carbon scaffold can provide sufficient space for volume expansion caused by Na + insertion, and the abundant heterointerface can accelerate ion-diffusion and electron transfer kinetics and dissipate the internal stress induced by volume expansion during the sodiation/desodiation process. As expected, the Co 9 S 8 @C-MoS 2 composite shows excellent sodium storage performance. Specifically, the Co 9 S 8 @C-MoS 2 composite displays excellent long-term cycling life (a high capacity of 429.4 mAh g −1 is maintained after 1500 cycles at 5.0 A/g), and superior rate performance (412.6 mAh g −1 is achieved even at 10.0 A/g).
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