International Journal of Electrochemical Science
·
2023
·
IF 1.5
Li Zheng,Chao-Rui Zhang,Dan Zhao,Xuan Wanga,Ting-Ting Du
A β-Ni(OH) 2 flakes modified carbon paste electrode [Ni(OH) 2 /CPE] has fabricated for hydrazine sensing. The β-Ni(OH) 2 flakes derived from nickel hexacyanoferrate (NiHCF) through a facile in situ electrochemical method and characterized by Fourier transform infrared spectrometry, X-ray diffraction, and scanning electron microscopy. Meanwhile, the electrochemical performances of the modified electrode studied by electrochemical impedance spectroscopy, chronocoulometry, cyclic voltammetry, and linear sweep voltammetry. Owing to the large active surface area and enhanced electron transfer efficiency of β-Ni(OH) 2 flakes, the Ni(OH) 2 /CPE showed enhanced catalytic activity toward the oxidation of hydrazine compared with NiHCF/CPE and unmodified CPE. Under the optimized conditions, the amperometric current presented linear dependence on the concentration of hydrazine in the ranges of 0.1 ~ 600 μM with the detection limit of 0.04 μM. Furthermore, the sensor has applied for the determination of hydrazine in water samples.
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高影响因子
Methods and Applications in Fluorescence
·
2023
·Vol. 12
·期 1
·015006
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IF 3.2
Dou Yang,Shuhan Jiang,Shuai Zhang,Xiaoyu Fan,Xiaodong Shao,Shuhao Wang,Rui Li,Qiaoli Yue
In this study, a test strip for fluorometric analysis of iron ion (Fe3+) was constructed based on nitrogen, zinc and copper codoped carbon dots (NZC-CDs) as fluorescence probes. NZC-CDs were synthesized by hydrothermal method. The morphology, size, components, crystal state and optical properties of NZC-CDs were characterized by transmission electron microscope (TEM), Fourier-transform infrared (FT-IR), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), UV–vis absorption and fluorescence spectroscopy techniques, respectively. NZC-CDs exhibited bright blue fluorescence under UV lamp with a quantum yield at 17.76%. The fluorescence of NZC-CDs was quenched by Fe3+ possibly due to the static quenching. The possible fluorescence quenching mechanism was also discussed. The quenching fluorescence was linear with the concentration of Fe3+ in the range of 2.5–400 μM with a low detection limit of 0.5 μM. For the convenient detection, the test strips based on filter paper were employed for Fe3+ assay. Moreover, the present approach was successfully applied in the determination of Fe3+ in real samples including black fungus, duck blood and pork liver. The sensing method had the potential application in more food analysis.
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PubMed
高影响因子
Food Packaging and Shelf Life
·
2025
·
IF 10.6
Wenjun Wu,Jiahao Zhong,Zhichao Yang,Ziqiang Qin,Chaoyi Shen,Zihan Cai,Xiangzheng Yang,Qilei Li,Da Wang,Jiangkuo Li,Xian Li,Di Wu,Kunsong Chen
To reduce postharvest mechanical damage, an in-situ fruit packaging solution integrating both force cushioning and real-time sensing functions is proposed. This was achieved using the synergistic effects of ion cross-linking and the Hofmeister effect to create ZnSO 4 cross-linked double-network hydrogels directly on the fruit surface. The results show that the hydrogels exhibited superior compressive strength, deformability, and Young’s modulus. With increasing concentrations of the ZnSO 4 solution, the compressive property, Young’s modulus, and cross-linking density of the hydrogels increased, while their energy dissipation rate decreased. The hydrogels cross-linked with a 0.3 M ZnSO 4 solution was the optimal one, achieving an energy dissipation rate of 35.2 %, while their compressive strength was 3.5 times that of the uncross-linked hydrogels, along with 3.9 times higher ionic conductivity and 75.9 % lower resistance. The optimal hydrogels could output electrical signals in response to strain at different rates and proportions and exhibited stable sensing over 100 compression cycles. Furthermore, the performance of the optimal hydrogels was evaluated using ripe and fragile kiwifruit. The cushioning test results show that the hydrogels could reduce vibration, compression and dropping damage, therefore effectively protecting the fruit. Besides, the hydrogels could quantitatively detect the compression force acting on fruit surfaces by outputting electrical signals in real-time. Additionally, the hydrogels achieved 96.8 % biodegradation within 6 h and had good biocompatibility. Overall, the present study proposed an idea of fabricating an in-situ fruit packaging with both cushioning and real-time sensing functions to reduce mechanical damage and facilitate inspection for fruit during postharvest transportation.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jinqiu Ye,Tiancheng Ge,Xin Qu,Mohamedazeem M. Mohideen,Ce Wang,Ping Hu,Yong Liu
The widespread application of aqueous zinc-ion batteries (AZIBs) is hindered by anode dendrite formation and side reactions, reducing cycling life and performance. This study introduces Bi-Bi₂O₃-loaded carbon nanofibers (Bi-Bi₂O₃@CNF) with hierarchical hollow structures and surface grooves fabricated via electrospinning, thermal treatment, and in situ growth. Experimental characterization and density functional theory reveal that the high surface area and fibrous network of Bi-Bi₂O₃@CNF enhance electron transport and electrolyte distribution, effectively reducing ohmic resistance and concentration polarization. This “Spatial Effect” provides ample space for uniform Zn deposition. Additionally, the in situ-grown Bi-Bi₂O₃, pyridinic nitrogen, pyrrolic nitrogen, and C─O─Bi bonds induce strong zinc affinity and electronegativity, generating an “Electrostatic Confinement Effect” that amplifies the “spatial effect” into a “Dual-Confinement Effect.” This synergy ensures uniform Zn deposition, suppresses dendrites and side reactions, and mitigates polarization. Compared to pure Zn anodes, Bi-Bi₂O₃@CNF reduces polarization overpotential by 17.6%, increases hydrogen evolution overpotential by 11.52%, and maintains a Coulombic efficiency of 98.8% for over 200 h. In full cells, Zn@Bi-Bi₂O₃@CNF//MnO₂ achieves 73.0% capacity retention after 1000 cycles at 1000 mA g⁻¹. This work provides a promising strategy for high-efficiency, durable, and safe AZIBs and offers valuable insights into the design of advanced aqueous energy storage materials.
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高影响因子
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