JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Yalei Zhang,Zengfu Yin,Chaomeng Dai,Xuefei Zhou,Wen Chen
Flower-like MoS 2 with numerous wrinkled nanosheets was prepared via a facile hydrothermal method . The surface morphology and microstructure of the obtained materials were characterized using X-ray diffraction data (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Additionally, the compositions of the flower-like MoS 2 were further revealed by an energy dispersion spectrometer (EDX) and X-ray photoelectron spectrometry (XPS). The obtained MoS 2 was used as an adsorbent to remove diclofenac (DCF, C 14 H 10 Cl 2 NO 2 Na) from aqueous solutions and presented excellent performance for removing DCF. The sorption kinetics, isotherms and effect of solution pH on the sorption were evaluated in batch sorption experiments. The sorption characteristics of the interactions between DCF and MoS 2 in water were analyzed using a pseudo-second-order model, an intraparticle diffusion model and Boyd model to determine the sorption rate-determining steps. It was concluded that the sorption of DCF on MoS 2 was fitted better by the pseudo-second-order model and that external diffusion governed the sorption process of DCF onto the MoS 2 . The interfacial interaction free energies between DCF and MoS 2 in the sorption process can be calculated based on the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO). The flower-like MoS 2 presenting excellent performance for removing DCF, could be a better choice of treating DCF-containing wastewaters.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 10
·107505
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IF 3.721
Peijin Wang,Qian Wu,Caixia Wang,Yuxin Pu,Mao Zhou,Mingxiao Zhang
In this work, a sensitive polyethylenimine functionalized Perylene derivative PTC-PEI, S2O82− and 3D flower-like MoS2 (3D MoS2 NFs) ternary system was fabricated for quantitation of Methotrexate (MTX) based on the quenched electrochemiluminescence (ECL) signals. Specifically, the PTC-PEI was prepared via cross-linking Perylenetetracarboxylic acid (PTCA) and polyethylenimine (PEI). Then, the hybrid nanocomposite PTC-PEI-MoS2 was synthysized through electrostatic absorption effect between PTC-PEI and 3D MoS2 NFs. With the excellent catalytic effect of 3D MoS2 NFs towards the electrochemical reduction process of S2O82− thus resulting in generation of more sulfate radical anions (SO4·−), the ECL signal probe PTC-PEI-MoS2 exhibits higher luminous efficiency compared with PTC-PEI (3-fold enhancement). In addition, electrochemical regenerable property of Mo6+/Mo4+ active sites endows 3D MoS2 NFs excellent signal enhancement efficiency. Under the optimum conditions, a linear range from 10 μM to 1pM with the limit of detection down to 0.15 pM could be obtained in MTX determination. Notably, the proposed strategy provides a new idea for sensitive determination of MTX.
研究领域:
分析化学
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纳米材料
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电化学
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生物传感器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 4
·1-15
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IF 2.533
Wang Zhentao,Hasan Jaafar,Wang Jingjing,Zhang Caiwei,Iqbal Waheed,Chang Ninghui,Qin Chuanguang
The treatment of dye-bearing wastes by adsorption using low-cost synthetic adsorbents is urgently needed and challenging because it offers the dual benefit of water treatment and waste management. Herein, the flower-like MoS 2 /g-C 3 N 4 nanocomposites with a size range of 200–400 nm and a specific surface area of 70.656 m2/g were synthesized as new methylene blue (MB) adsorbent materials. Their adsorption mechanisms and influences of pH, adsorbent dosage, concentration, and temperature on the adsorption properties were investigated by batch sorption experiments. Adsorption isotherm data were fitted with the Langmuir model, and the adsorption kinetic characteristics conform to the quasi second-order kinetic equation. According to thermodynamic data, methylene blue (MB) adsorption was endothermic and spontaneous, exhibiting a maximum adsorption capacity of 278.4 mg/g at 45 °C. Additionally, the impact of MB effluent on the germination of chickpea and wheat was studied contrastively with treatment of the tested materials. The results indicated that adequate adsorption of flower-like MoS 2 /g-C 3 N 4 nanocomposite could potentially treat wastewater from the textile industry to be used for irrigation and solve the problem of textile effluent disposal. Graphical abstract
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Jiguo Tu,Xiang Xiao,Mingyong Wang,Shuqiang Jiao
In this work, hierarchical flower-like MoS2 microspheres synthesized through a facile hydrothermal approach are used as a cathode for aluminum-ion batteries. They exhibit an initial specific discharge capacity of 153.6 mAh g–1 at a current density of 50 mA g–1 and deliver a stable capacity of 112.2 mAh g–1 with a Coulombic efficiency of 92.4% over 100 cycles on account of the unique hierarchical structure, which provides abundant space for aluminum storage. Moreover, the characterization results confirm that Al3+ ions can be intercalated into the MoS2 phase to form AlxMoS2 during the discharge process. The density functional theory calculation results indicate that the structure of MoS2 can be stabilized during the intercalation/deintercalation process.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
·
IF 3.218
Sai Zhang,Yuping Tang,Yanyan Chen,Jianbin Zheng
In this work, 3D flower-like MoS 2 microspheres with nanosheets were synthesized by a simple thiourea-assisted hydrothermal route and employed to support gold nanoparticles in order to fabricate a novel nitrite sensor. By this method, stable and well-distributed gold nanoparticles were formed due to the electrostatic attraction between APTES-functionalized MoS 2 and citric-stabilized gold nanoparticles. Electrochemical investigations indicated that Au NPs/MoS 2 nanocomposites exhibited an excellent performance towards nitrite oxidation . Under the optimal experimental condition (pH 6.0), the sensor displayed a wide linear range from 5.0 μM to 27.8 mM with a high sensitivity of 117.0 μAmM −1 cm −2 and a low detection limit of 1.67 μM. In a word, the present study demonstrates that the Au NPs/MoS 2 composites are promising electroactive materials for developing nitrite sensors with great potential.
研究领域:
材料科学
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电化学
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Daming Feng,Lixue Zhou,Chang Liu,Hui Li,Yusheng Zhang,Yali Yao,Tianyi Ma
Electrocatalytic nitrogen reduction reaction (NRR) for the synthesis of ammonia (NH 3 ) is one of the green and mild methods of artificial nitrogen fixation, promising as an alternative to replace the existing industrial process. Under the requirements of green chemistry and sustainable development, the design and development of highly active and stable electrocatalysts is very important for improved synthesis performance. Mimicking from the natural nitrogenase, Fe and Mo based catalysts have attracted much attention due to their superior catalytic performance for N 2 adsorption and activation. In this work, an interfacial engineering strategy has been used to prepare a Fe, Mo-bimetallic electrocatalyst for the electrosynthesis of NH 3 . In detail, the pre-pyrolyzed biochar-based Fe 2 O 3 composites were decorated with nano-flowered MoS 2 /MoO 2 hybrids by a solvothermal process (MoS 2 /MoO 2 @Fe 2 O 3 /BC). As confirmed by the extensive characterization, the further modification not only introduced functional counterparts into the electrocatalysts but also regulated the morphology of the nanostructure. The electrochemical tests showed that the highest NH 3 yield rate of MoS 2 /MoO 2 @Fe 2 O 3 /BC was 4.87 μg h − 1 cm −2 and highest FE was 16.5% in 0.1 M Na 2 SO 4 . The catalytic stability and durability were also presented in the longtime electrolysis and cycling experiments. The improved catalytic performance of decorated catalyst, as evidenced by the comparison with Fe 2 O 3 /BC, is attributed to the increased electrocatalytic active area, the moderated hydrophilicity, and the synergistic effect of Fe, Mo-bimetallic active sites. This study provides a new perspective for the design and development of low-cost transition metal complexes as electrocatalysts for nitrogen reduction reactions.
研究领域:
电化学
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催化
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材料科学
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环境化学
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可持续能源
✓ 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）