INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Yuewei Li,Xianglu Yin,Xiaohui Huang,Xiaolin Liu,Wei Wu
An efficient and scalable method combining ball-milling and liquid-phase exfoliation was used to prepare MoS 2 nanosheets . Ammonium bicarbonate as an exfoliation aid could accelerate the delamination and pulverization of bulk MoS 2 during preparation. The ball-milled MoS 2 was further exfoliated by sonication (S–MoS 2 NS) or high-speed shear-exfoliation (H–MoS 2 NS) to obtain MoS 2 nanosheets dispersion with high concentration. Moreover, MoS 2 quantum dots were also obtained by prolonging sonication time (S–MoS 2 QS). Most of S–MoS 2 NS and H–MoS 2 NS have lateral dimensions less than 150 nm. The S–MoS 2 QS size concentrates at around 5 nm. The H–MoS 2 NS mixed with aminated multi-walled carbon nanotubes (MWCNT) could form H–MoS 2 NS/MWCNT composites with a good conductive network, and was used as a hydrogen evolution reaction (HER) catalyst. The H–MoS 2 NS/MWCNT composites containing 56 wt% H–MoS 2 NS exhibited a favorable HER activity with a low overpotential of 284 mV at 10 mA/cm 2 , a Tafel slope of 97 mV/dec and good stability in acid medium.
研究领域:
材料科学
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化学工程
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 39
·47991
·
IF 2.188
Dekang Cheng,Huan Wang,Bin Liu,Shan Wang,Yang Li,Yushuang Xia,Chuanxi Xiong
Flexible dielectric materials with high electric energy density and high-temperature resistant characteristic are of great importance for modern electronics and electrical systems. Herein, two-dimensional molybdenum disulfide (MoS 2 ) nanosheets were efficiently produced via liquid-phase exfoliation and then incorporated into polyimide (PI) to prepare MoS 2 /PI dielectric nanocomposites. Compared to the pristine PI, MoS 2 /PI nanocomposite films exhibited much larger dielectric permittivity while their dielectric losses still maintained relatively low levels. On the other hand, the Weibull breakdown strength of these nanocomposite films initially increased and then decreased with the increase in the MoS 2 content and gave rise to a maximum value of 395 MV m −1 at 1 vol % loading. Combination of the improved dielectric permittivity and breakdown strength makes the MoS 2 /PI nanocomposite film with 1 vol % MoS 2 possess an elevated energy density of about 3.35 J cm −3 . Moreover, good tensile and thermal properties of the nanocomposite films hold great promise for their applications in high-temperature and harsh conditions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47991.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Wenwen Liu,Bo Liang,Yongjin Ma,Yi Liu,Anquan Zhu,Pengfei Tan,Xiang Xiong,Jun Pan
The construction of a plasmonic photocatalyst is an efficient way to suppress detrimental electrons-holes recombination and extend the spectral range of light absorption in semiconductors. However, the facilitation effect in the aspect of electrons-holes separation is great limited as the lack of a driving force compelled the electrons or holes migration to surface catalytic sites makes them flow randomly in semiconductors. In this work, we confirm that the integration of MoS 2 nanosheets formed two dimensional (2D) layered heterojunction with C 3 N 4 with Au-C 3 N 4 plasmonic photocatalyst can further enhance electrons-holes separation through the formation of Au-C 3 N 4 -MoS 2 nanostructure by a facile ultrasonic chemical method . The integrated MoS 2 nanosheets extract the electrons not only from C 3 N 4 due to a building up of 2D layered heterojunction but also from plasmonic Au via a “pipe” played by C 3 N 4 . The electrons “pump” role of the 2D MoS 2 nanosheets makes electrons flow randomly turn into the well-organized migration direction, promoting the electrons-holes more efficient separation and lifetime prolongation. Meanwhile, MoS 2 nanosheets also increase the light absorption of the photocatalyst owing to its inherent strength of the narrower band gap. Enabled by integration of 2D MoS 2 nanosheets, the hydrogen production rate is 2.08 times higher than that of its counterpart Au-C 3 N 4. This work highlights a new window to employ 2D layered heterojunction for enhanced photocatalytic hydrogen evolution performance.
研究领域:
材料科学
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催化化学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2018
·
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.
研究领域:
生物医学工程
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分子诊断学
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
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.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
·
IF 5.31
Xiaming Feng,Bibo Wang,Xin Wang,Panyue Wen,Wei Cai,Yuan Hu,Kim Meow Liew
A novel method of preparing the molybdenum disulfide (MoS 2 ) nanosheets coated by polypropylene (PP) latex enables the fabrication of PP/MoS 2 nanocomposites in scalable quantities. PP nanocomposites with various contents of MoS 2 nanosheets were prepared by simply melt-blending the coated MoS 2 and PP materials. The barrier effect of MoS 2 nanosheets in the thermal decomposition process of PP materials was investigated under different atmosphere by thermogravimetric analysis (TGA), microscale combustion colorimeter (MCC) and thermogravimetric analysis–infrared spectrometry (TG–IR). Importantly, the peak heat release rate (PHRR) of PP/MoS 2 nanocomposites with MoS 2 loadings of 1.6 wt% is decreased by 28.1% compared to that of neat PP. Moreover, the thermal oxidative stability of PP is dramatically reinforced with the incorporation of MoS 2 nanosheets. A 41.3 °C increase in the temperature of the onset of degradation ( T −10% ) and a 40.1 °C increase in the temperature of maximum weight loss ( T max ) were observed by inclusion of as low as 1.6 wt% MoS 2 nanosheets. The excellent barrier performance together with the favorable compatibility of MoS 2 nanosheets is regarded as the key point for the reinforcement of thermal oxidative stability and reduction of flammable pyrolysis gas, which can provide promising applications in the development of fire safety polymer materials.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2023
·Vol. 23
·期 17
·7449
·
IF 3.9
Jin Hu,Jiajia Dai,Caiping Huang,Xierong Zeng,Weiwei Wei,Zhezhe Wang,Peng Lin
An organic electrochemical transistor (OECT) with MoS2nanosheets modified on the gate electrode was proposed for glucose sensing. MoS2nanosheets, which had excellent electrocatalytic performance, a large specific surface area, and more active sites, were prepared by liquid phase ultrasonic exfoliation to modify the gate electrode of OECT, resulting in a large improvement in the sensitivity of the glucose sensor. The detection limit of the device modified with MoS2nanosheets is down to 100 nM, which is 1~2 orders of magnitude better than that of the device without nanomaterial modification. This result manifests not only a sensitive and selective method for the detection of glucose based on OECT but also an extended application of MoS2nanosheets for other biomolecule sensing with high sensitivity.Keywords:organic electrochemical transistor;MoS2nanosheets;liquid phase ultrasonic exfoliation;glucose sensor
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 16
·5932-5941
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IF 8.262
Yu Zhou,Yong Liu,Wenxia Zhao,Fangyan Xie,Ruimei Xu,Baojun Li,Xiang Zhou,Hui Shen
A promising new concept is to apply additive/binder-free electrodes for lithium-ion batteries by directly growing active materials on current collectors, however, they still suffer from the low quality electronic contact and poor mechanical stability due to the lattice mismatch between active materials and substrates. Here we present the direct growth of vertically aligned MoS2 nanosheets on a Ti substrate through a self-supported TiO2 bonding interface route, thereby preferentially exposing the edges on the film surface. In this unique structure, MoS2 nanosheets are interconnected with each other and create a strong adhesion to the Ti substrate through the TiO2 bonding interface, which would allow electrons to easily transport throughout the whole electrode. Furthermore, their edge-terminated structure can provide more sites for Li-ion intercalation. By using this additive/binder-free electrode, it can deliver a discharge capacity as high as 1189 mA h g−1 at a current density of 1000 mA g−1 after 600 cycles. Importantly, our synthetic approach, based on this metal surface dissolution–crystallization produced bonding interface, can provide a general strategy for the direct growth of other metal sulphides such as NiS and CoS nanosheets on the Ti substrate with great promise for various applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 10
·6513-6522
·
IF 5.044
Chen Siling,Li Jilong,Song Yiheng,Yang Quanling,Shi Zhuqun,Xiong Chuanxi
Flexible piezoelectric nanogenerators for energy harvesting are getting more and more attention nowadays by converting the mechanical energy to electric energy. Here, an environment-friendly piezoelectric nanogenerator based on the regenerated cellulose (RC)/MoS 2 nanosheet nanocomposite successfully exhibited a relative high output voltage of 2 V and current of 150 nA under slight press which were 5 and 7.5 times higher than those of the neat RC film, i.e. 0.4 V and 20 nA, respectively. In particular, the MoS 2 nanosheets were obtained through a simple, facile and low-cost pathway by mechanical exfoliation in triethanolamine. The nanocomposite film with MoS 2 nanosheets content of 4% exhibited a high piezoelectric constant ( d 33 ) of 19 pC/N, which was 6.3 times higher than that of the neat RC film ( i.e. 3 pC/N). Thus, the RC/MoS 2 piezoelectric nanogenerator has great potential applications in the fields of energy harvester, sensors and is of great significance to environment protection.
研究领域:
材料科学
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能源技术
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wan-Long Li,Ping Fu,Wan-Ting Lin,Zi-Lu Zhang,Xiao-Wei Luo,Zhi-Kang Xu,Ling-Shu Wan
Thermally stable polymer nanofiltration membranes are urgently demanded in high temperature separation. However, thin-film composite (TFC) nanofiltration membranes fabricated by conventional interfacial polymerization suffer from pore size expansion and thermal instability under high temperature. Herein, we report the fabrication of MoS 2 nanosheet confined thin-film nanocomposite (TFN) membranes with enhanced thermal stability. The structural stability of the nanofiltration membranes were investigated by in-situ FTIR and in-situ AFM at different temperatures. The MoS 2 nanosheets significantly improve the thermal stability of the nanofiltration membranes by stabilizing the pores and surface strength under high temperature. Molecular dynamic (MD) simulation further confirms the confinement effect of the MoS 2 nanosheets on the thermal mobility of the polyamide chains. The TFN membrane presents a prominent permeance of over 30.0 L·m −2 ·h −1 ·bar −1 and high rejections to Na 2 SO 4 (99.8 %) and MgSO 4 (98.1 %) at 80 °C. It also shows long-term stability and desirable selectivity of SO 4 2− /Cl − at 80 °C. This work provides a feasible strategy for designing thermally stable nanofiltration membranes with excellent performance.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 11
·5762-5769
·
IF 6.739
Lihui Yuwen,Fei Xu,Bing Xue,Zhimin Luo,Qi Zhang,Biqing Bao,Shao Su,Lixing Weng,Wei Huang,Lianhui Wang
A general and facile method for water-dispersed noble metal (Au, Ag, Pd, Pt) nanocrystal modified MoS2 nanosheets (NM–MoS2 NSs) has been developed. By using sodium carboxymethyl cellulose as a stabilizer, well-dispersed NM–MoS2 NSs with homogeneously deposited noble metal nanocrystals (NM NCs) can be synthesized in aqueous solutions. Due to the transition from the semiconducting 2H phase to the metallic 1T phase, the chemically exfoliated MoS2 (ce-MoS2) NSs have improved electrochemical activity. The partially metallic nature of the ce-MoS2 NSs and the catalytic activity of the NM NCs synergistically make NM–MoS2 NSs a potential electrochemical catalyst. For the first time, Pd–MoS2 NSs were used as an electrocatalyst for methanol oxidation in alkaline media. The results showed that Pd–MoS2 NSs have enhanced catalytic activity with 2.8-fold anodic peak current mass density compared to a commercial Pd/C catalyst, suggesting potential for application in direct methanol fuel cells (DMFCs).
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ANALYST
·
2020
·Vol. 145
·期 19
·6369-6377
·
IF 3.978
Lingna Kong,Xinguang Zhou,Guoyue Shi,Yanyan Yu
A novel and simple “off-to-on” fluorescent sensing platform for β-amyloid oligomers (Aβo) was developed based on dye (FAM)-labeled single-strand DNA (FAM-ssDNA)-conjugated molybdenum disulfide nanosheets (MoS2 NSs). Due to strong adsorption of ss-DNA to the surface of MoS2 NSs, the fluorescence of FAM was quenched remarkably, leading to a fluorescent “off” state. However, in the presence of Aβo, a hybrid structure between Aβo and FAM-ssDNA resulted in the dissociation of FAM-ssDNA from MoS2 NSs and an obvious fluorescence recovery transformed the fluorescence to an “on” state. The developed fluorescence sensing assay showed a good linear relationship toward Aβo ranging from 0.01 to 20 μM (R2 = 0.994) with a satisfactory detection limit of 3.1 nM. Practical samples of hippocampus and cortex tissues from APP/PS1 double transgenic AD mice were applied to demonstrate feasibility of the assay. Moreover, we found that similar to MoS2 nanoparticles, MoS2 NSs possessed therapeutic effects on Alzheimer's disease (AD) by inhibiting Aβ aggregations and degrading the previously formed Aβ fibrils. Collectively, the high sensitivity, specificity, and good biocompatibility along with an efficient anti-aggregation ability, the presented fluorescent strategy with MoS2 NSs demonstrated their promising potential for future AD-related research.
研究领域:
生物化学
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医学诊断
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）