ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2019
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IF 7.149
Jinlong Han,Tingting Yan,Junjie Shen,Liyi Shi,Jianping Zhang,Dengsong Zhang
Capacitive deionization (CDI) has received wide attention as an emerging water treatment technology because of its low energy consumption, low cost, and high efficiency. However, the conventional carbon electrode materials for CDI have low densities, which occupy large volumes and are disadvantageous for use in limited space (e.g., in household or on offshore platforms). In order to miniaturize the CDI device, it is quite urgent to develop high volumetric adsorption capacity (VAC) electrode materials. To overcome this issue, we rationally designed and originally developed high VAC MoS2–graphene hybrid electrodes for CDI. It is interesting that MoS2–graphene hybrid electrode has a much higher NaCl VAC of 14.3 mg/cm3 with a gravimetric adsorption capacity of 19.4 mg/g. It has been demonstrated that the adsorption capacity is significantly enhanced because of the rapid ion transport of MoS2 and high electrical conductivity of graphene. In situ Raman spectra and high-angle annular dark-field scanning transmission electron microscopy tests demonstrated a favorable Faradaic reaction, which was crucial to enhancing the NaCl VAC of the MoS2–graphene hybrid electrode. This work opens a new avenue for miniaturizing future CDI devices.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ChemElectroChem
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2019
·Vol. 6
·期 13
·3393-3400
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IF 3.975
Shan Gong,Guangyu Zhao,Naiqing Zhang,Kening Sun
Graphical An upscaling opportunity : Polyethyleneimine (PEI) modified GO sheets (PEI−GO) absorb the ammonium thiomolybdate on the surface via electrostatic attraction, accompanying with the layer-by-layer assembling in the solution. The subsequent annealing process creates a sheet-on-sheet structure with unilaminar MoS 2 nanosheets lie on the GR sheets. Two-dimensional (2D) heterostructured materials, combining the desired advantages of individual 2D materials and eliminating the associated shortcomings, have inspired great interest in electrochemical energy storage applications. But searching a highly efficient and practical method for preparing 2D heterostructures as electrode materials is still challenging. Herein, a 2D MoS 2 /graphene (GR) heterostructure is synthesized through a facile and accessible self-assembly method, which includes adsorbing ammonium thiomolybdate onto graphene oxide (GO) surface via electrostatic attraction and subsequently annealing the precursor to heterostructure. A high loading amount (86.2 %) of unilaminar MoS 2 nanosheets lie on the GR sheets forming a face-to-face structure, and the MoS 2 nanosheets exhibit a largely expanded interlayer spacing (1.0–1.2 nm) resulting from the alternately stacked structure during self-assembly process. As a Li-ion intercalation host, this unique MoS 2 /GR heterostructure exhibits pseudocapacitance-dominated characteristics with superior kinetic performances and extremely high structural stability. These characteristics afford MoS 2 /GR heterostructure remarkable rate capability (155.6 mAh g −1 at 4 A g −1 ; 119.3 mAh g −1 at 16 A g −1 ) and a durable reversible capacity (over 5000 cycles). This method is suitable for mass production of MoS 2 /GR heterostructure and paves a way for utilizing 2D heterostructured materials in Li-ion or other metal ion batteries.
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
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IF 9
Hongliang Li,Zaijun Gong,Dongya Ma,Lei Guo,Jianwei Xie
Hybrid capacitive deionization (HCDI), an emerging desalination technique, is employed for the first time to remove the salt ions in the polypeptide solution, with the novel graphene aerogel (GA)/MoS 2 material as the cathode and the GA material as the anode. Structural characterization and performance tests demonstrate that the dispersed nanosheet structure of MoS 2 and the conductive 3D cross-network structure of GA synergistically stimulate more accessible redox active sites in GA/MoS 2 composite for ion storage. Specifically, the specific capacitance of the GA/MoS 2 composite electrode (143F·g −1 ) is twice that of the single MoS 2 electrode (72F·g −1 ). Also, the GA/MoS 2 electrode possesses exceptional ion removal capacity (32.71 mg·g −1 ) and high mean salt adsorption rate (0.85 mg·g −1 ·min −1 ). The ion removal mechanism and ion selectivity of the Cell GA(+)‖GA/MoS 2 (−) are investigated based on the electrode pairing mode, valence state and radius of ions, and Lewis acid-base theory. More importantly, the application of the Cell GA(+)‖GA/MoS 2 (−) in the polypeptide purification was confirmed by removing salt ions from the Ricinus communis biomarkers (RCB-2) polypeptide solution. The results display that the salt ions (92.1 %) were rapidly removed and the absolute recovery of the RCB-2 sample (62.4 %) was effectively obtained by mass spectrometry analysis. Therefore, this work provides a forward-looking strategy for the fast removal of salt ions from the polypeptide solution.
研究领域:
材料科学
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生物化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jiaming Ma,Ridong Wang,Dachao Li,Kexin Xu
Fiber-optic surface plasmon resonance (FO-SPR) sensors, known for the advantages in miniaturization, label-free, and high flexibility, are promising for continuous glucose monitoring. However, due to limited sensing area, FO-SPR sensors exhibit relatively lower sensitivity compared to prism-based SPR sensors. To address this issue, a novel FO-SPR sensor modified with a molybdenum disulfide (MoS 2 )-graphene heterostructure was proposed in this paper. The sensitivity was evaluated both theoretically and experimentally, which showed that the highest sensitivity was achieved with two layers of MoS 2 and two layers of graphene. Moreover, pyrene-1-boronic acid (PBA) was bound to the heterostructure to improve specificity for glucose molecules. It was found that the sensitivity was also further improved by using PBA, and total enhancement of heterostructure and PBA reached 1229.29 % compared to the sensor modified with only a gold film. The newly proposed FO-SPR sensor achieves a sensitivity of up to 12593.06 nm/RIU for glucose concentrations in the range of 0–500 mg/dL, indicating its potential for widespread application in glucose concentration measurement.
研究领域:
生物医学工程
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
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2019
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IF 3.839
Tong Guo,Lina Wang,Sen Sun,Yan Wang,Xiaoling Chen,Kangning Zhang,Dongxia Zhang,Zhonghua Xue,Xibin Zhou
A novel three-dimensional (3D) layered MoS 2 @graphene functionalized with nitrogen-doped graphene quantum dots (MoS 2 @N-GQDs-GR) composites as an enhanced electrochemical hydrogen evolution catalyst. The few layered MoS 2 nanoflowers supported on N-GQDs-GR surface were elaborately fabricated by one-pot hydrothermal method, which MoS 2 and N-GQDs-GR exist in a bonding manner of Mo-N. In addition, due to the layered MoS 2 sheet edge exposes more hydrogen evolution active sites and N-GQDs-GR have high conductivity, the composites exhibit prominent electrocatalytic activity with a low overpotential 99 mV, a small Tafel slope 49.3 mV/dec. Therefore, that the current work will develop HER catalysts may replace Pt.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）