JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2013
·
IF 2.672
Yangyang Gao,Huan Wang,Liping Guo
In this work, a glassy carbon electrode (GCE) modified with large mesoporous carbon and Nafion composites (LMC/Nafion) was constructed and used for simultaneous determination of theophylline (TP) and caffeine (CF). The electrochemical behaviors of TP and CF on the LMC/Nafion/GCE were carefully investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results show that the DPV peaks of the two analytes can be distinguished at the modified electrode with peak-to-peak separation about 150 mV, which means that LMC/Nafion/GCE is suitable for simultaneous determination of TP and CF. Under the optimized condition, the detection limits of TP and CF were 0.37 and 0.47 μM ( S / N = 3) with linear ranges of 0.8–180.0 μM and 1.3–230.0 μM, respectively. The proposed method was successfully applied to the simultaneous determination of TP and CF in human blood serum and beverages with reliable recovery.
研究领域:
分析化学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 5
·1219-1228
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IF 2.327
Xing Ruimin,Yang Haitang,Li Shengnan,Yang Jinghe,Zhao Xiaoyu,Wang Qinglong,Liu Shanhu,Liu Xiuhua
Fabrication of multicomponent nanocomposites as electrode-modified materials is an effective strategy to design highly active electrochemical sensors. Here, we present a facile strategy to fabricate the palladium phthalocyanine-multiwalled carbon nanotube (PdPc-MWCNTs) nanocomposite for the sensitive detection of rutin. Results showed that the prepared nanocomposites exhibited excellent electrocatalytic activity toward rutin due to the synergetic effects of PdPc and MWCNTs (excellent electric conductivity and catalytic activity) and the homogeneous dispersibility of Nafion. Under the optimized conditions, the developed sensor exhibited a linear response range from 0.10 to 51 μM for rutin with a low detectable limit of 75 nM and a fast response less than 3.0 s. The proposed method might offer a possibility for electrochemical analysis of rutin in Chinese medical analysis or serum monitoring owing to its low cost, simplicity, high sensitivity, good stability, and few interferences against common coexisting ions in real samples.
研究领域:
分析化学
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材料科学
·
药物分析
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 1
·96-103
·
IF 3.665
Meng Wang,Lin Mu,Hao Zhang,Suqian Ma,Yunhong Liang,Lei Ren
The flexible stretchable sensors have great potential for implementation in various applications, such as intelligent soft robots, health monitoring, and motion detection. However, most of the flexible stretchable sensors with microstructures and high sensitivities are fabricated by expensive templates and complex processes. In consideration of large-scale fabrication, a low cost and efficient way is in great demand. Herein, electroless plating on Nafion films with decent swelling ratios are proposed to fabricate stretchable sensors with wrinkle-structured electrodes. By adding isopropanol (IPA) to the electroless plating process, the H 2 O-IPA sensor with larger swelling ratio shows deeper surface wrinkles, higher surface roughness, and better sensitivity to strain. At the same time, the H 2 O-IPA sensor exhibit good durability (500 cycles). By mounting the sensor on the joint of human finger, the motion of the finger bending and even the bending degree can be accurately detected, indicating the potential use in the field of wearable devices and soft electronic skins.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 9
·2655
·
IF 3.5
Zhengying Guo,Peng Xu,Shiqing Zhou,Ruoxi Wu
Excessive levels of heavy metal pollutants in the environment pose significant threats to human health and ecosystem stability. Consequently, the accurate and rapid detection of heavy metal ions is critically important. A AgNPs@CeO2/Nafion composite was prepared by dispersing nano-ceria (CeO2) in a Nafion solution and incorporating silver nanoparticles (AgNPs). The morphology, microstructure, and electrochemical properties of the modified electrode materials were systematically characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and cyclic voltammetry (CV). By leveraging the oxygen vacancies and high electron transfer efficiency of CeO2, the strong adsorption capacity of Nafion, and the superior conductivity of AgNPs, an AgNPs@CeO2/Nafion/GCE electrochemical sensor was developed. Under optimized conditions, trace Pb2+in water was detected using square wave anodic stripping voltammetry (SWASV). The sensor demonstrated a linear response for Pb2+within the concentration range of 1–100 μg·L−1, with a detection limit of 0.17 μg·L−1(S/N = 3). When applied to real water samples, the method achieved recovery rates between 93.7% and 110.3%, validating its reliability and practical applicability.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 9
·5638-5648
·
IF 4.186
Daixiong Zhang,Qing Xiang
Nafion is suggested as an efficient assistant in preparing supercapacitor by employing nanoparticles. In this work, using a bi-additive of 0.10-mM NaOH + 0.10 g L −1 Nafion, Nafion-assisted electrophoretic co-deposition of Bi 2 O 3 –multiwalled carbon nanotubes (MWCNTs) coating is successfully realized in ethanol solvent. The capacitance performances of the electrophoretic coatings in 6.0-M KOH electrolyte are investigated by cyclic voltammetry and galvanostatic charge–discharge techniques. Comparing with Bi 2 O 3 coating prepared with electrophoretic deposition (EPD) by employing other additive (such as polyethyleneimine), the Bi 2 O 3 coating prepared by Nafion-assisted EPD shows a better capacitance performance. Benefiting from the improvement in coating conductivity caused by MWCNTs, with a small additional amount of 4.0 wt.%, the Bi 2 O 3 –MWCNTs coating exhibits an amazing 164% increase of mass-specific capacitance (473 F g −1 at the current density of 1.0 A g −1 ) in comparison with pure Bi 2 O 3 coating (179 F g −1 at the current density of 1.0 A g −1 ). The cyclic stability test exhibits excellent capacitance retention of 88.7% over 3000 cycles at a constant current density of 10.0 A g −1 . This work combines the advantages of MWCNTs, Nafion, and EPD to provide a facile route for preparing Bi 2 O 3 -based coating as a high-performance supercapacitor electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Miao Lu,Siyuan Zhang,Liang Ma,Zhongmei Song,Xiushen Ye,Huifang Zhang,Haining Liu,Zhijian Wu
The efficient removal of recalcitrant organics in high-salinity systems, specifically brine, poses a significant challenge for electrochemically advanced oxidation processes in terms of both activity and stability. Herein, a composite electrode comprising of CNT/Nafion functionalized Ti/SnO 2 -Sb/β-PbO 2 -CNT/Nafion was developed for efficient and stable removal of octadecylamine (ODA) and 4-dodecylmorpholine (DMP) in a real high-salinity environment. The degradation efficiencies of ODA and DMP on the composite electrode can reach 100 % within 60 min, respectively. The total organic carbon (TOC) removal efficiency of ODA and DMP was significantly improved to 78 % and 66 % with remarkably low energy consumption (0.414 and 1.402 kWh/g TOC), respectively. The electrochemical characterizations demonstrate that the composite electrode exhibits improved electrochemical activity (oxygen evolution potentials = 1.791 V) and electrode surface area (ECSA = 20 cm 2 ), while maintaining reduced charge transfer resistance ( R ct = 18.21 Ω/cm 2 ) and enhanced corrosion-resistant capacity (corrosion potential = 1.115 V). Based on recycling and accelerated lifespan testing, the composite electrode demonstrates exceptional stability and recyclability. Additionally revealed was the linked stability mechanism. The electrocatalytic degradation of ODA and DMP begins with the removal of amino and morpholine rings, and then the decomposition of the carbon chains. Gas chromatography-mass spectrometry (GC–MS) and theoretical calculations were used to identify intermediate products generated during the degradation of ODA and DMP, and possible degradation pathways were provided in high-salinity systems, respectively. This work offered a fresh perspective on electrocatalytic oxidation for a real high-salinity system that is more efficient and stable.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
高影响因子
MATERIALS RESEARCH INNOVATIONS
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2025
·
IF 0
Mengyuan Zhao,Tingting Wu,Jiale Han,Nan Hu,Hongyuan Zhao
We developed a facile and easy-to-use preparation technique to fabricate peanut shell-derived porous carbon (PSPC) with highly electroactive area and interconnected porous carbon structure. The introduction of zirconium dioxide (ZrO2) nanoparticles into the microporous structure of PSPC results in the formation of PSPC@ZrO2 composite, which was used as electrode sensitiser in the presence of Nafion membrane to modify the surface of glass carbon electrode (GCE) to successfully prepare the PSPC/ZrO2/Nafion/GCE sensor. PSPC has excellent conductivity and abundant electroactive region, which effectively facilitates electron transfer between the sensing interface and electrolyte. The biocompatible ZrO2 recognise the phosphate group of methyl parathion (MP), which enables the effective enrichment of MP. Meanwhile, the presence of Nafion enhanced the stability of the sensing electrode surface. The PSPC/ZrO2/Nafion/GCE sensor achieves highly sensitive detection of MP in the linear range of 0.05–10 μM (Limit of detection: 15.7 nM). The prepared sensor has favourable practicality for MP detection in real samples.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
ANALYTICAL LETTERS
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2012
·
IF 1.016
Peili Luo,Jie Liu,Yamin Li,Yurui Miao,Baoxian Ye
A novel voltammetric sensor using multi-wall carbon nanotubes (MWNTs) coupled with Nafion modified glassy carbon electrode (GCE) was developed for the detection of methylparaben (MP). The sensor exhibited good electrocatalytic activity toward the oxidation of MP in the phosphate buffer solution (PBS, pH 6.5). It displayed good sensitivity, repeatability, reproducibility, and long-term stability. Under the optimized conditions, the anodic peak current was linear with the concentration of MP in the range of 3 × 10−6 mol L−1 to 1 × 10−4 mol L−1. The detection limit was 1 × 10−6 mol L−1. The proposed method was successfully applied to determine MP in cosmetics with satisfactory results.
研究领域:
分析化学
·
电化学
·
化妆品科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
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2016
·
IF 4.035
Xiaolong Ma,Xin Zhang,Xinli Guo,Qi Kang,Dazhong Shen,Guizheng Zou
Sensitive and selective determining bio-related molecule and enzyme play an important role in designing novel procedure for biological sensing and clinical diagnosis. Herein, we found that dual-stabilizers-capped CdSe quantum dots (QDs) in composite film of multi-walled carbon nanotubes (CNTs) and Nafion, displaying eye-visible monochromatic electrochemiluminescence (ECL) with fwhm of 37 nm, which offers promising ECL signal for detecting ascorbic acid (AA) as well as the activity of alkaline phosphatase (ALP) in biological samples. It was also shown that the dual-stabilizers-capped CdSe QDs can preserve their highly passivated surface states with prolonged lifetime of excited states in Nafion mixtures, and facilitate electron-transfer ability of Nafion film along with CNTs . Compared with the QDs/GCE, the ECL intensity is enhanced 1.8 times and triggering potential shifted to lower energy by 0.12 V on the CdSe-CNTs-Nafion/GCE. The ECL quenching degree increases with increasing concentration of AA in the range of 0.01–30 nM with a limit of detection (LOD) of 5 pM. The activity of ALP was determined indirectly according to the concentration of AA, generated in the hydrolysis reaction of l -ascorbic acid 2-phosphate sesquimagnesium (AA-P) in the presence of ALP as a catalyst, with an LOD of 1 μU/L. The proposed strategy is favorable for developing simple ECL sensor or device with high sensitivity, spectral resolution and less electrochemical interference.
研究领域:
分析化学
·
生物医学工程
·
临床诊断
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Mingchao Cao,Shiteng Liu,Shusheng Liu,Zhaogang Tong,Xijun Wang,Xinhua Xu
In this study, monolayer titanium carbide (Ti 3 C 2 T x ) material was prepared, then the modified ZnO and Ti 3 C 2 T x were self-assembled to obtain the MXene based composite material. Finally, ZnO/Ti 3 C 2 T x /Nafion/Au electrodes were prepared to construct a dopamine electrochemical sensor for detection of dopamine. SEM, XRD measurements and so on verified the synthesis of monolayer Ti 3 C 2 T x and preparation of the MXene based composite material. Utilizing Chronoamperometry (I-t), we found the electrodes displayed a linear dynamic range from 0.1 to 1200 μM with a limit of detection of 0.076 μM (S/N = 3). Meanwhile, the sensitivity of the sensor is 96nA/μM and in the prepared biological samples, the recoveries of the sensor were 97.8%∼102.2%. Finally, the electrochemical sensor showed a good reproducibility and stability.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2022
·
IF 4.291
Xiaojun Zhang,Sujun Yu,Manhong Li,Minglu Zhang,Chengwei Zhang,Man Wang
The structure and additives of ionic polymer-metal composite (IPMC) are important factors affecting its performance. Macropores and multi-walled carbon nanotubes (MCNTs) were introduced into multilayered IPMC actuators by an orderly mesh of silica spheres to enhance the IPMC actuator’s performance. The mechanical of membranes is improved a lot by the uniform combination of MCNTs and macroporous multilayered MCNTs/Nafion membrane. In particular, Young’s modulus for the macroporous multilayered MCNTs/Nafion membrane increases by 3.3 folds (from 262.6 MPa to 858.1 MPa), and the hardness increases by 4.4 folds (from 28.2 MPa to 123.9 MPa). Electromechanical results of the IPMC actuator increase respectively by 1.41 (33.5 mm) and 2.2 (19.2 mN) folds in the air under a DC voltage of 5 V, compared with typical IPMC actuators.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Lili Xiao,Biwei Wang,Li Ji,Fu Wang,Qunhui Yuan,Guangzhi Hu,Angang Dong,Wei Gan
Recently, ordered mesoporous carbon has displayed attractive performance in electrochemical catalysis and sensing, benefiting from its rich and tunable pore texture. In this work, a novel electrochemical sensor based on a three-dimensionally interconnected mesoporous graphene framework (MGF) was developed for simultaneous determination of Cd(II) and Pb(II) in aqueous solution. Attributable to the abundant three-dimensional mesopores and good electrical conductivity of MGF, as well as the synergistic effect of Nafion and in-situ plated bismuth films, a highly sensitive determination of mixed metals at a Bi/MGF-Nafion/GCE is achieved. The proposed sensor exhibits wide linear responses for Cd(II) and Pb(II), ranging from 2–70 μg L −1 and 0.5–110 μg L −1 , respectively. The detection limits are about 0.5 and 0.1 μg L −1 for Cd(II) and Pb(II), respectively, which are about 6 and 100 times lower than the drinking water standards set by the World Health Organization (WHO). Moreover, Bi/MGF-Nafion/GCE has been applied for the detection of mixed metals in real water samples. The satisfying recoveries (87.5-109.2%) and relative standard deviations (RSD, 3.7-8.6%) make the proposed electrode a promising candidate for rapid and on-site monitoring of environmental metallic pollutants.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 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）