BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Lisi Wang,Xiaoqing Li,Baoli Wang,Fan Shi,Brij Mohan,Mansoor Ahmad,Wei Sun
Glyphosate (GLY) is one of the most widely used herbicides, and the presence of its residues in food samples poses a threat to human health. Developing a monitoring system could help address food safety concerns. This study presents an innovative electrochemical sensing platform to detect GLY, which employs molybdenum disulfide (MoS 2 ) and black phosphorene (BP) nanocomposites (MoS 2 @BP) with horseradish peroxidase (HRP) for the working electrode modification. The MoS 2 @BP nanocomposite is synthesized using a hydrothermal method, and its characteristics are investigated through different methods including scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction methods. The presence of BP enhances electrical conductivity and increases specific surface area, while MoS 2 improves the electrochemical properties of the composites and provides a protective effect on BP. The modification of MoS₂@BP on the electrode surface helps to accelerate the direct electron transfer of HRP with enhanced electrochemical responses. Furthermore, the incorporation of amino acid residues from HRP significantly enhances the recognition of GLY, thereby improving the selectivity and sensitivity of this electrochemical sensor. The sensor operates effectively within a linear concentration range from 0.118 nmol/L to 20.65 μmol/L, with a low detection limit of 0.0393 nmol/L (3σ). Furthermore, the sensor is successfully applied to detect GLY in real cornmeal samples with satisfactory results, demonstrating its potential applications in food safety monitoring.
研究领域:
食品科学
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环境科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Peifan Qin,Deqi Yi,Jianwei Hao
To investigate thermal shock properties of melamine cyanurate (MCA) for molybdenum disulfide (MoS 2 ) exfoliation, the MoS 2 -MCA superlattice is prepared through self-assembly of pristine MoS 2 , cyanuric acid (CA) and melamine (MA) in water solution. The prepared MoS 2 -MCA is heated in tubular furnace with controlled temperature to obtain two-dimensional (2D)-MoS 2 precursor. Their morphologies are characterized by using Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The obtained 2D-MoS 2 precursor shows a high specific surface area at 336.90 m 2 /g due to bi-layer MoS 2 . TEM and atomic force microscope (AFM) images of 2D-MoS 2 N-methyl-2-pyrrolidone (NMP) solution further confirm the bi-layer MoS 2 exfoliation. The above results prove that MCA is a good thermal shock agent for MoS 2 exfoliation. And the prepared 2D-MoS 2 precursor could also be a good solid reservoir.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qiang Yao,Jing Guo,Fucheng Guan,Jia Li,Yi Xu,Xin Zhang,Zheng Li,Yihang Zhang,Shi Feng
In order to improve the dispersion of molybdenum disulfide (MoS 2 ) and enhance the performance of MoS 2 , two alginate-derived biomass carbon-MoS 2 (BC-MoS 2 ) composites: CMB/CMS, were prepared by introducing BC during the synthesis of MoS 2 by hydrothermal. The effects of different gels, times and temperatures of the synthesized BC-MoS 2 were investigated, and the adsorption capacity for methylene blue (MB), basic fuchsin (BF) and copper ions (Cu 2+ ) was tested. The results indicated that the vertical growth of MoS 2 on the BC surface could be realized when using xero-gel, while the BC and MoS 2 were mixed uniformly when using wet-gel. Compared with MoS 2 , the hydrophilicity and water dispersibility of BC-MoS 2 were greatly improved, and BC-MoS 2 had better adsorption capacity for MB/BF/Cu 2+ (99.61/86.83/60 mg/g). The adsorption mechanism exhibits that the adsorption force of BC-MoS 2 on MB/BF is mainly based on the electrostatic force, and the adsorption on Cu 2+ comes from the electrostatic force and the Lewis soft-soft interaction. This study dramatically enriches the application of transition metal chalcogenides and provides a meaningful reference for wastewater treatment.
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
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2013
·Vol. 31
·期 8
·987-991
·
IF 0.917
Lei Huang,Pingfei Luo,Man Xiong,Rizhi Chen,Yong Wang,Weihong Xing,Jun Huang
Commercial MoS 2 was found to be a highly selective catalyst for the reduction of nitrobenzenes to the corresponding anilines with hydrazine under mild conditions. MoS 2 is not only much cheaper, but also more selective than noble metal catalysts for the reduction of functional nitrobenzenes to the corresponding anilines. Nitrobenzenes with halides (F, Cl, Br and I) were reduced selectively, and the corresponding anilines were obtained in excellent yields, and no dehalogenation was detected. Functional groups such as NH 2 , OH, alkene groups were tolerated during the reduction of the nitro compounds. The reduction of p -chloronitrobenzene was studied over MoS 2 and Pd/C respectively with hydrazine. The yield of p -chloroaniline was much higher with MoS 2 than that with Pd/C at full conversion.
研究领域:
化学
·
催化材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Yingcan Zhao,Jiayi Xu,Xingyu Jiang
Chemically exfoliated MoS2 (ce-MoS2) nanosheets have been widely used in biomedical and environmental fields. Some in vitro studies demonstrated that ce-MoS2 might induce toxicity. However, the understanding of the mechanism of potential toxicity is lacking. In this study, we found that ce-MoS2 could directly induce breakage of double-stranded DNA with or without an external energy input, making it different from other two-dimensional nanomaterials. In a dark environment, the DNA cleavage exhibited a pH-dependent trend due to reactive oxygen species generation under different pH values. Under photoirradiation, DNA cleavage could be enhanced. This study provides insights into the potential environmental risk and toxicity of ce-MoS2 in the aquatic environment.
研究领域:
生物医学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Ming Qu,Jirui Hou,Tuo Liang,Pengpeng Qi
Much attention has been directed toward amphiphilic nanosheets in diverse applications owing to their remarkable properties. In this work, the rhamnolipid-molybdenum disulfide nanosheets, environmentally friendly biological-amphiphilic-nanosheets (BANs), are prepared through the one-step simple hydrothermal method. The ultralow concentration of BANs (0.005 wt %), as a solid emulsifier, can emulsify crude oil and stabilize the size of emulsions (oil in water) within 1.2 μm. The adsorption of BANs to the oil–water interface improves the stability of the BANs emulsion, and it both reduces interfacial tension and increases interfacial film strength. Tremendous desorption energy (thousands of KBT) is required to remove a single BAN from the interface to the bulk phase. Besides, BANs can turn an oil-wet surface into an intermediate-wet surface and spread to exfoliate oil film on the solid surface. The evolution of the three-phase contact line experiences two stages: a steep stage and a gentle stage. The spreading behaviors are due to an imbalance between the surface forces and structuring disjoining pressure at the confinement region (wedge film). Moreover, 25.3% of additional oil recovery was observed from the flooding of an ultralow concentration of BANs nanofluid (0.005 wt %) in a natural outcrop core, which is 2.5 mD in permeability at experimental conditions: 120 °C and around 25 × 104 mg/L in salinity. The high tolerance of rhamnolipid-molybdenum disulfide nanosheets to high temperature and harsh salinity is because of synergism between MoS2 nanosheets and rhamnolipid molecules. Additional residual oil reduction is due to a combination of multiple effects such as crude oil emulsification, wettability alteration, interfacial tension reduction, and formation of structuring disjoining pressure. This study presents the possibility to enhance oil recovery in low-permeability reservoirs with harsh conditions.
研究领域:
材料科学
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化学工程
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石油工程
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2016
·Vol. 10
·期 7
·549-553
·
IF 2.578
Song Hao,Bingchu Yang,Yongli Gao
We report a simple and effective way of fabricating molybdenum disulfide (MoS 2 ) nanoscrolls by self-rolling up fractured monolayer CVD-grown MoS 2 microflakes. Morphological results reveal that MoS 2 nanoscrolls are formed only at newly formed edges, owing to an orientation-specific fracture behavior. Using Raman spectroscopy, we show that the E 1 2g Raman peak (A 1g peak) for MoS 2 nanoscrolls significantly red-shifts (blue-shifts), indicating structural change. The proposed mechanism is that the newly formed edges induced by fracture behavior self-roll up to nanoscrolls to minimize the surface free energy, meanwhile, the serious lattice contradiction of upper sulfur plane controls the rolling directions. (© 2016 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim)
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Feika Bian,Lingyu Sun,Lijun Cai,Yu Wang,Yuanjin Zhao,Shuqi Wang,Mengtao Zhou
As a new class of two-dimensional (2D) materials, molybdenum disulfide (MoS 2 ) has huge potential in biomedical area; while its applications in multiplex bioassays are still a challenge. Here, we present novel MoS 2 -integrated silica colloidal crystal barcode (SCCB) for multiplex microRNA (miRNA) screening. MoS 2 was adsorbed on SCCBs by electrostatic interaction , and quantum dots (QDs) decorated hairpin probes were coupled on MoS 2 by covalent linkage. As the MoS 2 could quench the QDs of the hairpin probes, they together formed a molecular beacon (MB) structure before the detection. When used in assays, target miRNA could form a double strand with the probe and made QDs keep away from MoS 2 sheets to recovery their fluorescence. Because the released QDs were positively correlated with the concentration of the hybridized nucleic acid , the target miRNAs could be quantified by measuring the fluorescence signal of the QDs on the SCCBs. In addition, by utilizing different MoS 2 -integrated structural color encoded SCCBs, multiplexed miRNA quantification could also be realized. Based on this strategy, we have demonstrated that several pancreatic cancer-related miRNAs could be selectivity and sensitivity detected with a detection limit of 4.2 ± 0.3 nM. These features make the MoS 2 -integrated SCCB ideal for many potential applications.
研究领域:
生物医学工程
·
纳米技术
·
癌症研究
·
分子诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Zhengbin Xia,Guizhi Liu,Yuqiang Dong,Yanhong Zhang
Introducing inorganic layered nanomaterials into polymer arrays is one of the important methods to improve the anti-corrosion performance of epoxy coatings, but the compatibility between them is the first problem to be solved. In this study, lamellar molybdenum disulfide (MoS 2 ) is modified by polydopamine (PDA) to improve its dispersibility and anti-corrosion properties in epoxy resin coatings. PDA is firstly coated onto the surface of MoS 2 successfully, which can be proved by FT-IR, Raman and SEM. Then, the PDA modified MoS 2 (MoS 2 @ PDA) is introduced into epoxy resin system to prepare a new epoxy resin coatings (MoS 2 @ PDA/EP). The anticorrosive performance of EP (pure epoxy coatings), MoS 2 /EP and MoS 2 @ PDA /EP coatings are evaluated by electrochemical impedance spectroscopy spectra (EIS), polarization curve and pull-off adhesion tests. Compared to EP coating, the corrosion resistance of MoS 2 @ PDA/EP coating has increased nearby three orders amount and the adhesion strength of MoS 2 @ PDA/EP coating has increased nearby 3 Mpa. So, polydopamine modified MoS 2 (MoS 2 @ PDA) is an effective nanocomposite for preparing high-peroformane anticorrosion epoxy coatings.
研究领域:
材料科学
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化学工程
·
腐蚀科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 27
·5362-5372
·
IF 4.543
Hong-Lei Shuai,Xu Wu,Ke-Jing Huang
In this work, we report the development of an ultrasensitive sandwich-type electrochemical aptasensor for protein detection. The aptasensor is fabricated by using nitrogen-doped graphene oxide (N-GO) and Au nanoparticles (AuNPs) as sensing substrates, molybdenum disulfide (MoS2) spheres as the hybridization chain reaction (HCR) platform, and thrombin as the model protein. When the hybridization reaction is initiated through two biotinylated hairpin probes, vast horseradish peroxidases are immobilized on the long duplex by the biotin–avidin reaction. An electrochemical–chemical–chemical redox cycling reaction then takes place in the detection system, which contains p-dihydroxybenzene, ferrocene carboxylate and tris(2-carboxyethyl)phosphine. Benefiting from the good conductivity and high specific surface area of N-GO/AuNPs and MoS2 spheres, signal amplification of the HCR and detection system, and excellent selectivity of the aptamer and sandwich-type strategy, the proposed assay shows a wide linear range of 10 fM–0.1 nM towards thrombin with a detection limit of 27 aM (S/N = 3) along with clear distinction from different proteins. The proposed assay is successfully used to detect thrombin in human serum, which would have promising prospects for disease diagnosis and therapy.
研究领域:
分析化学
·
生物化学
·
生物传感器
·
分子诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2020
·Vol. 78
·期 3
·1213-1230
·
IF 2.014
Jiang Yang,Wang Jinyuan,Wu Jian,Zhang Yong
Molybdenum disulfide (MoS 2 ) is a potential additive for rubber enhancement. However, its poor dispersion and weak interaction with matrix limit its further application. To improve the dispersion of MoS 2 in natural rubber (NR) and enhance the interaction of MoS 2 with matrix, single-layered MoS 2 nanosheets are prepared and further modified by cysteine. The modified MoS 2 nanosheets and epoxidized natural rubber (ENR) are premixed and then added into a NR/carbon black compound to obtain a NR/carbon black/ENR-modified MoS 2 nanosheets composite. The reaction between modified MoS 2 nanosheets and ENR is proved by FT-IR spectra. The modified MoS 2 nanosheets can improve the dispersion of carbon black in NR, and ENR can significantly improve the dispersion of modified MoS 2 nanosheets in the composite. The addition of ENR-modified MoS 2 nanosheets premixture can improve the abrasion resistance, increase the crosslink density and control the dynamic mechanical properties of NR. These improved properties can be attributed to the good filler dispersion and enhanced filler–matrix interaction in NR matrix.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 43
·18103-18111
·
IF 7.79
Hanjun Jiang,Lu Zheng,Jing Wang,Manzhang Xu,Xuetao Gan,Xuewen Wang,Wei Huang
Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have received much attention in nonlinear optical applications due to their unique crystal structures and second harmonic generation (SHG) efficiency. However, SHG signals in TMDs show a layer-dependent behavior, consistent with the presence (absence) of inversion symmetry in even-layer (odd-layer) of TMDs. Herein, we synthesized monolayer and bilayer 2H and 3R phase vanadium (V)-doped MoS2 crystal. Raman spectroscopy, XPS, and STEM were used to identify the chemical composition and crystalline structure of as-grown nanoflakes. SHG measurement was used to research the symmetry of V-doped MoS2 crystals with different stacking orders. Significantly, the SHG efficiency in bilayer 2H phase V-doped MoS2 is equivalent to the 3R phase, indicating an inversion symmetry broken lattice structure caused by the in situ V substitute for Mo sites. This study will be conducive to promote the development of promising nonlinear optical devices based on 2D material.
研究领域:
材料科学
·
非线性光学
·
纳米技术
·
凝聚态物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）