JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Juguo Dai,Yan Lv,Jiatian Zhang,Dandan Zhang,Hongmei Xie,Chuanluan Guo,Aoqi Zhu,Yiting Xu,Mizi Fan,Conghui Yuan,Lizong Dai
This paper rationally designs the morphology and phase structure of carbon nanotube/polyaniline@MoS 2 (CNT/PANI@MoS 2 ) composites, with MoS 2 conductive wrapping growing vertically on the outer layer of the composites via hydrothermal method . The crystalline nature and chemical properties are characterized by X-ray diffraction (XRD), Flourier transformation infrared spectroscopy (FT-IR), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS). Morphology and microstructures are determined by Scanning electric microscopy (SEM), Transmission electron microscope (TEM) and Brunauer–Emmett–Teller (BET). The developed composites possess excellent electrochemical properties (the specific capacitance is substantially increased by ~119%, reaching 700.0 F g −1 after wrapping by MoS 2 ) and good cycling stability (after over 5000 cycles retains 80.8% capacitance) in three-electrode systems, which indicating that the unique morphology of MoS 2 shells endow the channels to composites for rapid charge transport and ionic diffusion. Furthermore, symmetric supercapacitors devices assembled with the CNT/PANI@MoS 2 composites achieve specific capacitance of 459.7 F g −1 at 1 A g −1 , capacitance retention is 97.4% after 10,000 cycles and reach superior energy density of 40.9 Wh kg −1 at the power density of 400 W kg −1 . This strategy of three-dimensional wrapping method may open up a new potential to relieve the dilemma of degraded performance of supercapacitor , while improving the capacitance and stability for supercapacitors.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·10698-10706
·
IF 9.9
Zhai Naixin,Luo Juhua,Shu Pengcheng,Mei Jie,Li Xiaopeng,Yan Wenxing
Rational design of the components and microstructure is regarded as an efficacious strategy for the high-performance electromagnetic wave absorbing (EMWA) materials. Herein, the CoTe 2 @MoS 2 nanocomposites with CoTe 2 nanorods and MoS 2 nanosheets were synthesized via a hydrothermal method. The microstructure and composition of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The CoTe 2 @MoS 2 composite was composed of stacked CoTe 2 as the core and intertwined MoS 2 nanosheets as the shell. The electromagnetic parameters of the CoTe 2 @MoS 2 composites were investigated by vector network analyzer (VNA). The EMWA property of the composite showed a trend of first increasing and then decreasing with the increasing content of MoS 2 . When the mass ratio of MoS 2 and CoTe 2 was 1:1, the CoTe 2 @MoS 2 composite exhibited the minimum reflection loss value of −68.10 dB at 4.71 GHz, and the effective absorption bandwidth value might reach 4.64 GHz (13.08–17.72 GHz) at a matching thickness of 1.60 mm with filler loading of 50 wt.%. The extraordinary EMWA property was attributed to the optimized impedance matching, multiple scattering and reflections, dipole polarization, conductive loss, and interfacial polarization. Therefore, the present approach to the design of microstructure and interface engineering offers a crucial way to construct high-performance EMW absorbers.
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DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Miao-Ling Lin,Qing-Hai Tan,Jiang-Bin Wu,Xiao-Shuang Chen,Jin-Huan Wang,Yu-Hao Pan,Xin Zhang,Xin Cong,Jun Zhang,Wei Ji,Ping-An Hu,Kai-Hui Liu,Ping-Heng Tan
The material choice, layer thickness, and twist angle widely enrich the family of van der Waals heterostructures (vdWHs), providing multiple degrees of freedom to engineer their optical and electronic properties. The moiré patterns in vdWHs create a periodic potential for electrons and excitons to yield many interesting phenomena, such as Hofstadter butterfly spectrum and moiré excitons. Here, in the as-grown/transferred twisted bilayer MoS2 (tBLMs), one of the simplest prototypes of vdWHs, we show that the periodic potentials of moiré patterns also modify the properties of phonons of its monolayer MoS2 constituent to generate Raman modes related to moiré phonons. These Raman modes correspond to zone-center phonons in tBLMs, which are folded from the off-center phonons in monolayer MoS2. However, the folded phonons related to crystallographic superlattices are not observed in the Raman spectra. By varying the twist angle, the moiré phonons of tBLM can be exploited to map the phonon dispersions of the monolayer constituent. The lattice dynamics of the moiré phonons are modulated by the patterned interlayer coupling resulting from periodic potential of moiré patterns, as confirmed by density functional theory calculations. The Raman intensity related to moiré phonons in all tBLMs are strongly enhanced when the excitation energy approaches the C exciton energy. This study can be extended to various vdWHs to deeply understand their Raman spectra, moiré phonons, lattice dynamics, excitonic effects, and interlayer coupling.
研究领域:
凝聚态物理
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材料科学
·
纳米技术
·
光电子学
·
声子学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Chao Li,Banggui Lao,Zhike Li,Huibin Yin,Zhenyu Yang,Hongyu Wang,Deliang Chen,Xiaoli Zhang,Yongjun Xu,Chenghua Sun
Dual-ion batteries (DIBs) offer unique merits for energy storage, such as high energy density and excellent safety, but are usually limited by sluggish kinetics for anions intercalation into graphite cathodes under high voltage range (≥5.4 V). Here, we reported MoS 2 as a novel cathode to store anion owing to larger layered spacing (~ 6.15 Å) than graphite (~ 3.35 Å). Such structure can effectively improve anion intercalation kinetics and achieve excellent stability in a wide voltage window (below 5 V). Complete batteries have been further fabricated, achieving stable cycling performance with promising working voltage and energy density, which exceeds most reported DIBs.
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产品关联
DOI
高影响因子
ENGINEERING FAILURE ANALYSIS
·
2022
·
IF 3.634
Anhua Ren,Min Kang,Xiuqing Fu
Ni/WC-MoS 2 composite coatings were fabricated in electrolytes with different MoS 2 doping levels using jet electrodeposition. We investigated the surface characteristics of Ni/WC-MoS 2 composite coatings, including the composition, surface morphology, microhardness and tribological behaviour. We also analysed the Ni/WC-MoS 2 composite coating wear mechanism during the wear process. The outcomes determined that Ni/WC-MoS 2 coatings had better surface quality, smaller grain size and larger coating thickness than Ni/WC coatings. The doping of MoS 2 promoted the deposition of WC in the coatings, which further enhanced the microhardness of the coatings. The Ni/WC-MoS 2 composite coatings doped at a MoS 2 concentration of 5 g/L exhibited a maximal microhardness of 730 HV 0.1 . Doping by MoS 2 effectively minimized the coefficients of friction ( CoFs ) of the composite coatings to 0.3. During the wear process, the repair effect of MoS 2 and formation of oxidised friction films transformed the adhesive wear into oxidative wear assisted by abrasive wear, which improved the abrasion resistance of the coatings and diminished the wear rate. The wear rate of the Ni/WC-5 g/L MoS 2 composite coating decreased by 47.34 % in comparison with that of coatings without MoS 2 doping, which was 7.44 × 10 4 μm 3 /N∙m. The findings indicate that doping MoS 2 can effectively enhance the surface wear resistance. This research provides a practical approach to prolong the service life of metal parts.
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 80
·76614-76620
·
IF 3.289
Shao Su,Wenfang Cao,Chi Zhang,Xiaoyan Han,Huan Yu,Dan Zhu,Jie Chao,Chunhai Fan,Lianhui Wang
Recently, the use of a molybdenum disulfide (MoS2) nanosheet as a sensing platform has attracted more and more scientists' attention due to its graphene-like structure and excellent physical/chemical properties. Herein, the performances of MoS2-based electrochemical sensors were improved by decorating noble metallic nanoparticles on the surface of the MoS2 nanosheet. Taking catechol (CC) as an analyte, it could be found that the MoS2 nanosheet and its derivatives have excellent electrocatalytic abilities toward CC. More interestingly, the gold nanoparticles-decorated MoS2 nanosheet (Au–MoS2), platinum nanoparticles-decorated MoS2 nanosheet (Pt–MoS2) and gold–platinum core–shell nanoparticles-decorated MoS2 nanosheet (Au@Pt–MoS2) modified electrodes exhibited better detection performances than the pure MoS2 nanosheet and metallic nanoparticles modified electrodes due to their synergistic effect. As expected, the Au@Pt–MoS2 nanocomposites modified electrode exhibited the linear range of 2–1000 μM and the detection limit of 0.44 μM for CC detection, which was better than all MoS2-based nanomaterials. All the MoS2-based electrochemical sensing platforms were employed to determine CC both in buffer and in real samples with satisfactory results, suggesting MoS2-based nanomaterials maybe the potential candidates for constructing electrochemical sensors for chemical and biological molecules detection.
✓ 已验证
产品关联
DOI
高影响因子
SmartMat
·
2025
·Vol. 6
·期 2
·e1318
·
IF 12.8
Jinbo He,Jinjian Yan,Tao Xue,Liqian Yuan,Yongxu Hu,Zhongwu Wang,Xiaosong Chen,Yinan Huang,Cheng Han,Liqiang Li,Wenping Hu
Two-dimensional (2D) materials, such as MoS 2 , show exceptional potential for next-generation electronics. However, the poor stability of these materials, particularly under long-term operations and high temperature, impedes their practical applications. Here, we develop a terminal passivation interface decoupling (TPID) strategy to significantly improve the stability of MoS 2 , by mitigating the interaction between the substrate and the 2D material within the in-situ growth process. Specifically, the strong electron-withdrawing terminal group hydroxyl, prevalent on the oxide substrate, is passivated by carbon groups. Due to this, the structure of MoS 2 materials remains stable during long-term storage, and its electronic devices, field-effect transistors (FETs), show remarkable operational and high-temperature (400°C) stability over 60 days, with much-improved performance. For example, mobility increases from 9.69 to 85 cm 2 /(V·s), the highest value for bottom-up transfer-free single crystal MoS 2 FETs. This work provides a new avenue to solve reliability issues of 2D materials and devices, laying a foundation for their applications in the electronic industry.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xianchong Miao,Ningning Xuan,Qi Liu,Weishu Wu,Hanqi Liu,Zhengzong Sun,Minbiao Ji
Two-dimensional (2D) materials have attracted broad research interests across various nonlinear optical (NLO) studies, including nonlinear photoluminescence (NPL), second harmonic generation (SHG), transient absorption (TA), and so forth. These studies have unveiled important features and information of 2D materials, such as in grain boundaries, defects, and crystal orientations. However, as most research studies focused on the intrinsic NLO processes, little attention has been paid to the substrates underneath. Here, we discovered that the NLO signal depends significantly on the thickness of SiO2 in SiO2/Si substrates. A 40-fold enhancement of the NPL signal of graphene was observed when the SiO2 thickness was varied from 270 to 125 nm under 800 nm excitation. We systematically studied the NPL intensity of graphene on three different SiO2 thicknesses within a pump wavelength range of 800–1100 nm. The results agreed with a numerical model based on back reflection and interference. Furthermore, we have extended our measurements to include TA and SHG of graphene and MoS2, confirming that SiO2 thickness has similar effects on all of the three major types of NLO signals. Our results will serve as an important guidance for choosing the optimum substrates to conduct NLO research studies on 2D materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-9
·
IF 5.479
Chen Jia,Li Yunchun,Huang Yanni,Zhang Haijuan,Chen Xingguo,Qiu Hongdeng
The authors describe a fluorometric strategy for the determination of dopamine (DA). It is based on the use of aptamer-functionalized MoS 2 quantum dots (QDs) and MoS 2 nanosheets (NSs). The QDs and NSs were extensively characterized with regard to their physical and chemical properties using methods such as TEM, XRD, FT-IR, EDX and molecular spectroscopies. The aptamer against dopamine was labeled with QDs acting as the energy donor in an energy transfer system, while the NSs serve as the energy acceptor. Under the optimal conditions, the fluorescence (FL) intensity (best measured at excitation/emission peaks of 315/412 nm) increases with increasing DA concentration in the range from 0.1 nM to 1000 nM, with a lower detection limit of 45 pM. The method was successfully applied to the determination of DA in complex matrices. In our perception, the method has a wide scope in that it may be extended to other biomolecules for which respective aptamer are available. The QDs show excellent optical properties, good stability, low cytotoxicity, and may also be applied to fluorometric imaging of live cells.
A “turn-on” fluorometric aptasensor for the determination of dopamine (DA) was established based on aptamer-functionalized molybdenum disulfide quantum dots (MoS 2 QDs) and MoS 2 nanosheets. This assay exhibits high selectivity and sensitivity with a detection limit as low as 45 pM.
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产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Lei Wang,Haiyan Liu,Yu Fan,Pei Yuan,Deqi Huang,S. Ted Oyama,Tinghai Wang,Xiaojun Bao
In alumina-based catalysts the properties of the alumina support directly influence the structure (size, morphology, orientation, etc.) of the resulting active phase and ultimately determine the performance of the final catalysts. This paper presents a facile and efficient method for γ-Al 2 O 3 to simultaneously expose {111} facets with strong acidity and {110} facets with moderate basicity. It is shown that the metal oxides NiO x and MoO x can be selectively deposited and subsequently sulfided on the respective facets to form a NiS 2 -MoS 2 /Al 2 O 3 catalyst with substantially enhanced activity for thio-etherification reaction. By cooperative action of the active sites on the newly exposed facets, the catalyst is shown to have superior activity over a conventional NiMoS/Al 2 O 3 catalyst in the thio-etherification reaction between ethanethiol and isoamylene (2-methyl-2-butene) to yield ethylamyl thioethers. Our findings show that tuning the physicochemical properties via crystal facet engineering and inducing cooperative catalysis via preferential deposition of active metals open a novel avenue for the rational design and synthesis of high performance catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Zhiyong Yin,Zhibing Zhang,Xili Jing,Linchuan Hu,Shuguang Li,Jianshe Li
Background Surface plasmon resonance (SPR) sensing technology has been widely used in biometrics, but the weak detection capability and low sensitivity limit the development of SPR biosensors. In this work, we propose to employ the transition metal disulfide (TMD) material MoS 2 to induce the SPR effect into the near-infrared band. The aim of this work is to develop a near-infrared sensor capable of quantitatively detecting the concentration of cDNA, which is able to solve the problems of low sensitivity, parameter crosstalk and so on. Results The results show that the sensitivity of the SPR sensor at infrared wavelengths is 1.69 times higher than that of visible, and the infrared wave is more suitable as an excitation source for the SPR effect because it has a stronger evanescent field. In addition, we have prepared a DNA hybridization sensor that can work in the near-infrared band to detect complementary DNA (cDNA) concentration. Moreover, a combined cascade and parallel strategy realized the temperature and PH detection. The sensor uses the photonic crystal fiber as the platform, silver film as an excitation layer, and MoS 2 as a modulation layer. The optimal parameters of the sensor were determined during the experiment, and the three-parameter detection was successfully realized. The experimental results show that the three sensing channels can work independently, and the DNA hybridization probe can achieve selective detection of cDNA with a sensitivity as high as 0.22 nm/(nmol/L). Significance The proposed three-channel DNA hybridization sensor has high sensitivity and accuracy. The innovation of this work is to demonstrate that infrared waves are more suitable to be used as the excitation source of SPR sensors and that the proposed three-channel sensor has a promising future in early diagnosis and biosensing.
研究领域:
生物传感
·
分子生物学
·
光学工程
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Hang Yin,Dafeng Hu,Xuemin Geng,Hu Liu,Yanfen Wan,Zhanhu Guo,Peng Yang
We demonstrate heterogeneous integration of 2D self-assembled films of Au nanoparticles (NPs) and 2D MoS 2 monolayer. The Au NPs film has a compact, long-range-ordered structure, with its particles exhibiting a narrow size distribution. In addition, large-area coverage was achieved between the two components. Photoluminescence (PL) quenching was observed after the attachment of Au NPs film onto MoS 2 monolayer, which was attributed to electron transfer and shielding of light by Au NPs film. This work broadens our understanding of PL properties in such 2D hybrids.
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DOI
高影响因子
危险品化学品经营许可证（带存储）