JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2016
·Vol. 28
·期 2
·1777-1784
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IF 1.798
Chang Chengshuai,Yang Xuena,Xiang Shisen,Que Haoan,Li Mei
Using polypyrrole (PPy) nanotubes as the substrate, the layered molybdenum disulfide (MoS 2 ) nanosheets were wrapped on PPy nanotubes to form MoS 2 /PPy nanocomposites by a hydrothermal reaction. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed that MoS 2 nanosheets coated uniformly on the surface of PPy nanotubes owing to the electrostatic force. The specific capacitance of the MoS 2 /PPy nanocomposites was high up to 307.5 F g −1 , much higher than that of the pure PPy with specific capacitance of 106.3 F g −1 and MoS 2 with specific capacitance of 138.5 F g −1 at a current density of 1.0 A g −1 in 1 M KCl electrolyte. And the special structure of MoS 2 /PPy nanocomposites electrode reduces the deformation during the charge–discharge process and thus improves the rate stability and electrochemical cycling stability of the electrode significantly. The specific capacitance retains 96.47 % after 1000 charge–discharge processes which provides potential as supercapacitors.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Benlong Wei,Zhuannian Liu
Hybrid capacitive deionization (HCDI) is an innovative CDI technology that outperforms conventional CDI concerning desalination capability and charge efficiency. However, underutilized cathodes or anodes and mismatched kinetic behavior remain unsatisfactory given the imbalanced device architecture consisting of the capacitor and Faraday electrodes. Herein, we proposed a pseudo-capacitive behaviors induced dual-ion selective deionization (Di-CDI) strategy where molybdenum disulfide/polypyrrole (MoS 2 /PPy) acted as Na + intercalation cathode, and Ag-coated polyaniline-modified activated carbon (Ag@PANI/AC) served as Cl − trapping anode. In this system, the hollow PPy nanotube as the core is anchored by ultrathin MoS 2 nanoflakes, connecting loose MoS 2 nanoflowers to form a 3D flower-chain network, which holds convenient electron transfer routes and fast charge transport channels, facilitating accelerated ion diffusion process. Besides, Ag@PANI/AC was synthesized by modifying Ag particles on a 3D electron conduction substrate constructed by coupling PANI and AC, where Ag is responsible for the conversion reaction with Cl − to create AgCl. The conduction matrix compensates for the low conductivity of AgCl, enabling fast adsorption kinetics. As expected, the assembled Di-CDI system MoS 2 /PPy//Ag@PANI/AC delivers an excellent adsorption capacity of 25.1 mg g -1 , outstanding desalination rate (5.88 mg g -1 min -1 ), superior cycle stability (91.5% retention rate), and promoted charge efficiency of 56.2%, validating that this strategy supplies a viable way to achieve more energy-efficient CDI.
研究领域:
材料科学
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环境科学
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电化学工程
✓ 已验证
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2015
·Vol. 32
·期 9
·886-892
·
IF 3.081
Junyu Lei,Xiaofeng Lu,Guangdi Nie,Ziqiao Jiang,Ce Wang
A facile one-pot synthetic route is reported to prepare algae-like molybdenum disulfide/polypyrrole (MoS 2 /PPy) nanocomposite through a redox reaction between ammonium tetrathiomolybdate and pyrrole monomer under a hydrothermal condition without any other templates. The as-prepared unique algae-like MoS 2 /PPy nanocomposites are composed of few layer MoS 2 nanosheets, which are covered with PPy. Structural and morphological characterizations of this unique nanocomposite are investigated by Fourier-transform infrared spectra, Raman spectra, X-ray diffraction pattern, X-ray photoelectron spectra, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The as-prepared MoS 2 /PPy nanocomposites exhibit an excellent peroxidase-like catalytic activity toward the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) in acetate buffer solution (pH 4.0), which provides a facile strategy for the colorimetric detection of H 2 O 2 with a high sensitivity.
研究领域:
材料科学
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生物化学
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分析化学
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DOI
高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 7
·e70191
·
IF 2.6
Shiyou Yu,Jieyu Song,Xinyu Zhao,Ruiyan Xiang,Chong Tan
In this study, a MoS 2 /polypyrrole (PPy) nanocomposite sensing film was constructed in situ on a glassy carbon electrode (GCE) surface via chemical oxidative polymerization. The synergistic coupling of high-surface-area layered MoS 2 and conductive PPy not only significantly increased the effective electrochemical active area of the electrode but also generated multiple affinity interactions toward chlorpyrifos (CPF) molecules through the edge-active sites of MoS 2 and the π -conjugated structure of PPy, endowing the composite film with prominent adsorption-enrichment capability and excellent selectivity for CPF. Upon enrichment of CPF, the specific interactions between the organophosphate groups and the MoS 2 /PPy interface modulated the electron transfer kinetics of the composite film, producing quantifiable electrochemical signals proportional to the pesticide concentration. Under optimized conditions, the proposed sensor achieved a low detection limit of 1.10 μg/L for CPF and exhibited outstanding anti-interference capability and favorable operational stability in complex agricultural product matrices. Real sample analysis demonstrated that the spiked recoveries ranged from 97.69% to 100.83%, with RSD values of 2.34%–3.53%, verifying the excellent accuracy and reliable analytical performance of the as-prepared material. This work provides a novel nanocomposite sensing material for organophosphorus pesticide residue detection and manifests great application potential in agricultural product quality and safety monitoring.
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2020
·
IF 6.444
Xiao-ren Pan,Mao Wang,Xiao-dong Qi,Nan Zhang,Ting Huang,Jing-hui Yang,Yong Wang
Polymer-based dielectric nanocomposites with high dielectric constant and low loss have been widely used for energy storage applications in power electronics and power delivery systems. However, there are still changes in preparing polymer-based dielectric nanocomposites with the suppressed loss (tan δ ) and maintain breakdown strength ( E b ) through simple compound method. In this work, a simple approach to fabricate outstanding comprehensive performance dielectric composites was proposed by cooperating molybdenum disulfide-polypyrrole (MoS 2 -PPy) hybrids with polyvinylidene Fluoride (PVDF). The MoS 2 -PPy hybrids were prepared by in situ polymerization of pyrrole with exfoliated MoS 2 nanosheets , showing a “sandwich-like” structure of PPy/MoS 2 /PPy. MoS 2 -PPy hybrids significantly influenced the dielectric properties of their composites. As result, PVDF/MoS 2 -PPy composites achieved high dielectric constant (149.5@1 kHz), suppressed dielectric loss (0.19@1 kHz) and high breakdown strength (250.6 MV m −1 ). The emphasized reasons of high dielectric property are the enhanced interfacial polarization and formation of nano- and micro-capacitor networks. This work could provide an effective method to design and improve the performance of polymer-based dielectric nanocomposites for power system and energy storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）