CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Gangqiang Tang,Mingfei Jiang,Xin Zhao,Zhuoao Du,Dong Mei,Chun Zhao,Lijie Li,Yanjie Wang
Flexible sensors have broad application prospects in fields of medical electronics, environmental monitoring and wearable devices. Among them, ionic polymer sensors (IPS), with the sensing mechanism resembling biological processes, have drawn significant attention. Traditional Nafion-based IPS using water and alkali metal cations as electrolyte suffer from issues like performance degradation and signal instability water evaporation. Ionic liquids (ILs), as solvent-free electrolytes, hold promise in solving these problems. However, the impact of ILs on Nafion-based IPS performance remains unclear. In this paper, we investigated the influence of various parameters during the IL immersion process on IPS performance. By adjusting immersion temperature and time, different samples were prepared, whose mass change, stiffness, surface resistance and the electrochemical performance are studied. Furthermore, the influence of imidazolium type on sensing performance of IPS is also explored. Then an IL-based IPS sensor with optimal performance is obtained, the sensitivity of which was increased by 150 % and the sensing stability was greatly improved compared with the traditional water-based IPS. The application potential of the IL-based IPS in human motion monitoring was explored, including swallowing, speaking, mouse operation, pulse, knee joint movement and gait. The results of this work prove the effectiveness of obtaining high-performance Nafion-based IPS with IL as electrolyte through direct heating and immersion, and are expected to contribute to the rapid preparation of high-stability IPS.
研究领域:
传感器
·
高分子科学
·
电化学
·
材料科学
·
生物医学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2011
·
IF 2.78
Yang Fan,Jin-Hang Liu,Hai-Ting Lu,Qin Zhang
The TiO 2 –graphene (TiO 2 –GR) nanocomposite for paracetamol electrochemical sensing is described. The electrochemical behavior of paracetamol at the Nafion/TiO 2 –GR composite film modified glassy carbon electrode (GCE) was investigated by cyclic voltammetry. The results showed that the incorporation of TiO 2 nanoparticles with graphene significantly enhanced the electrochemical reactivity and voltammetric response of paracetamol. In addition, Nafion acts as an effective solubilizing agent and antifouling coating in the fabrication of the modified electrode. This electrochemical sensor exhibits excellent analytical performance for paracetamol detection at physiological pH with detection limit of 2.1 × 10 −7 M, linear range of 1–100 μM and reproducibility of 3.6% relative standard deviation.
研究领域:
分析化学
·
电化学传感器
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Guangwei He,Jing Zhao,Shen Hu,Lingqiao Li,Zongyu Li,Yifan Li,Zhen Li,Hong Wu,Xinlin Yang,Zhongyi Jiang
The objective of this study is to develop a novel approach to in situ functionalizing multiwalled carbon nanotubes (MWCNTs) and exploring their application in Nafion-based composite membranes for efficient proton conduction. Covalent grafting of acrylate-modified MWCNTs with poly(methacrylic acid-co-ethylene glycol dimethacrylate), poly(vinylphosphonic acid-co-ethylene glycol dimethacrylate), and sulfonated poly(styrene-co-divinylbenzene) was achieved via surface-initiated distillation precipitation polymerization. The formation of core–shell structure was verified by TEM images, and polymer layers with thickness around 30 nm were uniformly covered on the MWCNTs. The graft yield reached up to 93.3 wt % after 80 min of polymerization. The functionalized CNTs (FCNTs) were incorporated into the Nafion matrix to prepare composite membranes. The influence of various functional groups (−COOH, −PO3H2, and −SO3H) in FCNTs on proton transport of the composite membranes was studied. The incorporation of FCNTs afforded the composite membranes significantly enhanced proton conductivities under reduced relative humidity. The composite membrane containing 5 wt % phosphorylated MWCNTs (PCNTs) showed the highest proton conductivity, which was attributed to the construction of lower-energy-barrier proton transport pathways by PCNTs, and excellent water-retention and proton-conduction properties of the cross-linked polymer in PCNTs. Moreover, the composite membranes exhibited an enhanced mechanical stability.
研究领域:
材料科学
·
高分子化学
·
能源材料
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燃料电池技术
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纳米复合材料
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·14129-14135
·
IF 3.288
Shuping Wu,Kanghui Li,Zihang Zhang,Lingyun Chen
A promising electrochemical sensing platform based on imprinting chitosan (CS) nanocomposites integrating multi-walled carbon nanotubes (MWCNTs)/graphene (GR)/gold nanoparticles (AuNPs)/Nafion was developed for the sensitive and selective detection of Pb2+. The platform was constructed via drop coating and electrodeposition methods and characterized by using cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. Under the optimized conditions, the proposed sensor showed good sensitive determination of Pb2+ in the range of 1.0 × 10−9–5.0 × 10−5 mol L−1 with a detection limit of 2.83 × 10−10 mol L−1. In the presence of interfering metal ions, the fabricated sensor could selectively detect Pb2+. Meanwhile, the imprinted sensor exhibited high repeatability, good reproducibility and stability. The successful detection of Pb2+ in water and milk samples suggested its potential application for monitoring Pb2+ in complex water systems for environmental protection and food safety applications.
研究领域:
环境科学
·
材料科学
·
分析化学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Xiaoyan Liu,Zhongqiang Shan,Kunlei Zhu,Jiangyong Du,Qiwei Tang,Jianhua Tian
Lithium sulfur batteries have brought significant advancement to the current state-of-art battery technologies due to their high theoretical specific energy of 1675 mAh g −1 . However, the rapid capacity degradation, mainly caused by polysulfide dissolution, remains a significant challenge prior to practical applications. In this work, a sulfur cathode modified by bifunctional nafion/γ-Al 2 O 3 membrane has been successfully prepared, which can remarkably immobilize the polysulfides within the unique cathode structure due to its ions selectivity and absorbent capacity. A high initial discharge capacity of 1448.0 mAh g −1 can be achieved at 1C and 788.6 mAh g −1 preserved after 200 cycles, indicating a slow degradation. Furthermore, the coulombic efficiency maintains as high as 97% during cycling. The excellent electrochemical properties can be attributed to the bifunctional and stable membrane which can dramatically reduce the shuttle effect and keep integrated even after charging–discharging for 200 cycles.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 114
·113570-113575
·
IF 3.289
Wenyu Gao,Xiaofang Wang,Pei Li,Qiongtao Wu,Fang Qi,Songmei Wu,Yu Yu,Kejian Ding
A highly sensitive and selective electrochemical sensor is developed for the detection of cadmium with a nanosheet graphitic carbon nitride (g-C3N4) modified electrode. The g-C3N4 nanosheet modified glassy carbon electrode detects heavy metal not only by electrostatic interactions, but also by intercalating the holes during differential pulse anodic stripping voltammetry (DPASV) measurements for Cd2+ in aqueous solution. The calibration curves for Cd2+ covered two ranges varying from 1 nM to 1 μM and 1 μM to 100 μM. The limitation of detection (LOD) is estimated to be 0.5 nM for Cd2+, which is 53 times lower than the guideline values of drinking water given by the World Health Organization (WHO). In addition, the good repeatability and stability of the modified electrode is feasible for heavy metal detection in this study.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Jiao Zou,Jin-Gang Yu
In this work, we have fabricated nafion (NF) stabilized black phosphorus nanosheets (BPNSs) and 6-O-α-maltosyl-β-cyclodextrin (G2-β-CD) composite (BPNSs-G2-β-CD) as novel electrochemical sensoring platform for chiral recognition of tryptophan (Trp) enantiomers. BPNSs-G2-β-CD composite modified glassy carbon electrode (BPNSs-G2-β-CD/GCE) was further coated with NF which served as a protective film to immobilize BPNSs-G2-β-CD on the electrode surface to achieve high stability. Under the optimum conditions, the oxidation peak current ratio of L-Trp to D-Trp (I L /I D ) and the difference between the peak potential (ΔEp = E D - E L ) were observed to be 1.49 and 20 mV at NF/BPNSs-G2-β-CD/GCE by square wave voltammetry (SWV). In addition, a linear calibration curve could be obtained for peak current versus Trp enantiomers in the concentration range 0.01–1.00 mM with detection limits of 1.07 μM and 1.71 μM for L-Trp and D-Trp (signal-to-noise ratio of 3, S/N = 3), respectively. The chiral recognition mechanism was also proposed, and the intermolecular hydrogen bonding interactions as well as the hydrophobic-cavity-triggered embedding effect dominated the effective chiral recognition. Moreover, the proposed NF/BPNSs-G2-β-CD/GCE showed excellent stability, good reproducibility and anti-interference capability. Therefore, the designed chiral sensor is expected to be practically applied for the sensitive recognition of Trp enantiomers in real samples.
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Materials Express
·
2021
·Vol. 11
·期 4
·461-468
·
IF 0
Shen Xiaosheng,Liu Mingli,Kong Cong,Zhai Wenlei,Fodjo Essy Kouadio,Cai Youqiong
Tetrodotoxin (TTX) is one of the most toxic nonprotein marine neurotoxins without antidotes. Two enzyme-free electrochemical immunosensor for the detection of TTX are fabricated in this work. On this immunosensor, a competitive immunoassay is established. Chitosan and Nafion are used
to facilitate the TTX antigen modification, where TTX antigen is attached to gold nanoparticles (AuNPs) to perform good electrochemical measurement. The detection strategy involves an enzyme-free process when performing electrochemical immunoassay. The LOQ of 4 µg/kg for real samples
and the linear range from 2 to 1250 ng/mL for solution test are obtained. Recovery of >78% and relative standard deviation of <6.1% for the two immunosensors are further validated by spiking experiment. Test on pufferfish samples shows consistency with the results from the HPLC-MS method.
These electrochemical immunosensors have the merits of being portable, low cost, battery-powered and fast for practical application, which can be a promising alternative to ELISA for on-site detection.
研究领域:
分析化学
·
毒理学
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环境科学
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食品安全
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产品关联
DOI
ADVANCED COMPOSITE MATERIALS
·
2025
·
IF 2.3
Mingfei Jiang,Gangqiang Tang,Yu Shu,Shilong Liu,Chun Zhao,Yanjie Wang
Ionic polymer-metal composites (IPMC) have emerged as an ideal material for artificial skin applications due to their exceptional flexibility and skin-mimetic ion transport properties. However, conventional IPMC fabricated from commercial Nafion membranes are typically limited to a minimum thickness of 50 μm, which significantly restricts their compatibility with human skin. In this study, we developed a novel fabrication process for thin IPMC with thickness of less than 50 μm. We successfully cast Nafion films with thicknesses of 30 μm, 40 μm, 50 μm, and 60 μm by using the glass-slide drip-casting technique. Then Pd-Au composite electrodes were deposited on their surfaces by electroless plating (immersion reduction, IR) and electroplating. We analyzed and evaluated the electrochemical performance and bending sensing performance of IPMC with different thicknesses. The specific capacitance of the IPMC with a thickness of 60 μm was 3 times higher than that of the sample with a thickness of 30 μm, and the sensing performance was 4.25 times higher. Compared with the IPMC prepared from a commercial Nafion film (50 μm) of the same thickness (bending output voltage of 0.4 mV), the IPMC prepared by this process showed superior sensing performance (bending output voltage of 0.8 mV). After 1000 bending cycles, the signal attenuation rate remained below 5%. This work provides important technical support for the research and development of ultra-thin flexible sensors.
研究领域:
材料科学
·
高分子科学
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电化学
·
柔性电子学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 5
·1251-1257
·
IF 2.726
Li Yang,Wang Xian,Liu Jie,Jin Zhao,Liu Changpeng,Ge Junjie,Xing Wei
In this work, the effect of Nafion ionomer content on the structure and catalytic performance of direct CO polymer electrolyte membrane fuel cell(CO-PEMFC) by using Rh-N-C single-atom catalyst as the anode catalyst layers was studied. The ionic plaque and roughness of the anode catalyst layers increase with the increase of Nafion ionomer content. Furthermore, the contact angle measurement results show that the hydrophilicity of the anode catalyst layers also increases with the increase of Nafion ionomer content. However, when the Nafion ionomer content is too low, the binding between microporous layers, catalyst layers and membrane cannot meet the requirement for either electric conductivity or mass transfer. While Nafion ionomer content increased above 30%, the content of water in anode is difficult to control. Therefore, it was found that AN 30(30% Nafion ionomer content of anode) is the best level to effectively extend the three-phase boundary and improve CO-PEMFCs performance.
研究领域:
能源材料科学
·
催化化学
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产品关联
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 24
·4912-4918
·
IF 1.915
Pengfei Pang,Fuqing Yan,Haizhen Li,Haiyan Li,Yanli Zhang,Hongbin Wang,Zhan Wu,Wenrong Yang
A novel electrochemical sensor for highly sensitive and selective detection of dopamine (DA) was developed based on a graphene quantum dots (GQDs) and Nafion composite modified glassy carbon electrode (GCE). GQDs were synthesized by a hydrothermal approach for cutting graphene sheets into GQDs and characterized by TEM, UV-vis, photoluminescence, and FT-IR spectra. The GQDs had carboxyl groups with a negative charge, which not only provided good stability, but also enabled interaction with amine functional groups in DA through electrostatic interaction to enhance the specificity of DA. The interaction and electron communication between GQDs and DA can be further strengthened via π–π stacking force. Nafion was used as an anchoring agent to increase the robustness of GQDs on the electrode surface and sensor stability and reproducibility. The GQDs–Nafion composite exhibits a good linear range of 5 nM to 100 μM and a limit of detection as low as 0.45 nM in the detection of DA. The proposed electrochemical sensor also displays good selectivity and high stability and could be used for the determination of DA in real samples with satisfactory results. The present study provides a powerful avenue for the design of an ultrasensitive detection method for clinical application.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2026
·
IF 6.6
Hyejeong Jin,Hyunseo Park,Shurouq Abdulqadir Mohammed,Mengmeng Chu,Maha Nur Aida,Changgeon Lim,Hasnain Yousuf,Muhammad Quddamah Khokhar,Junsin Yi
Silicon heterojunction (HJT) solar cells are sensitive to recombination losses and moisture-induced degradation at mechanically exposed edges. In this study, an untreated 0 wt% control and Nafion solutions with concentrations of 3, 5, 7, and 10 wt% were evaluated on mechanically cut 4 cm × 4 cm HJT solar cells, corresponding to an active area of 16 cm 2 , four exposed edges, and a total exposed edge length of 16 cm. The devices were evaluated using illuminated J–V measurements, dark I–V characterization, damp heat testing at 85°C/85% RH, photoluminescence, X-ray photoelectron spectroscopy, and a calibrated analytical edge-recombination consistency assessment. The host-cell group before cutting exhibited average values of J sc = 39.20 ± 0.05 mA/cm 2 , V oc = 749.36 ± 1.00 mV, FF = 81.70 ± 0.30%, and PCE = 24.00 ± 0.15%. After mechanical cutting, the untreated cut-cell group exhibited J sc = 38.20 ± 0.03 mA/cm 2 , V oc = 722.00 ± 1.00 mV, FF = 78.39 ± 0.45%, and PCE = 21.62 ± 0.13%. The optimized 3 wt% Nafion-treated group achieved J sc = 39.18 ± 0.05 mA/cm 2 , V oc = 748.12 ± 1.32 mV, FF = 81.55 ± 0.32%, and PCE = 23.91 ± 0.15%. Based on the group-average values, the treatment recovered approximately 95.47% of the cutting-induced V oc loss and 96.22% of the PCE loss. The treated cells also retained higher illuminated J–V parameters during damp heat exposure, demonstrating that concentration-optimized Nafion edge passivation can improve both the efficiency and environmental stability of mechanically cut HJT solar cells.
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DOI
高影响因子
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