JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2013
·
IF 2.672
Yinfeng Li,Lina Zou,Ge Song,Kunjing Li,Baoxian Ye
The electro-polymerization of l -Theanine was investigated for the first time on glassy carbon electrode and the polymeric conditions and mechanism were discussed in detail. Hereafter, a simple and sensitive electrochemical sensor based on the poly( l -Theanine) film was established for sophoridine sensing. The electrode process of sophoridine was then studied by cyclic voltammetry and its determination was achieved by amperometry . The results revealed that the poly( l -Theanine) membrane effectively decreased the oxidation potential of sophoridine and greatly increased its response current. And this sensor, fabricated easily and simply as well as very easy surface update, showed good response for sophoridine with a wide linear range from 1.0 × 10 −6 to 1.4 × 10 −4 mol L −1 and a low detection limit of 5 × 10 −7 mol L −1 . The application of proposed method in analysis of real sample was also evaluated with good performance. This work promoted the potential applications of amino acid materials in electrochemical sensors.
研究领域:
分析化学
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电化学
·
药物分析
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生物传感
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分子诊断
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药物代谢
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Zhiwei Qiu,Tao Yang,Rui Gao,Guifen Jie,Wanguo Hou
In this study, a novel Cu-based metal−organic frameworks (Cu-MOFs) composite material was prepared, and used to develop a sensitive and efficient electrochemical ratiometric sensor for dopamine detection. Gold nanoparticles (NPs) and the conductive poly(xanthurenic acid) p(XA) were assembled on the Cu-tetrakis (4-carboxyphenyl) porphyrin (TCPP) surface by electrodeposition and cyclic voltammetry (CV) method, which greatly improved the electrocatalytic performance of the Cu-MOF modified electrode . Two substances (dopamine/DA, paracetamol/PA) with different electrochemical peaks were added to the electrolyte solutions , where DA was the analyte and PA was as a reference. The ratiometric value of differential pulse voltammetry (DPV) oxidation current (I DA /I PA ) linearly increased with the increasing concentration of DA with low detection limit. This electrochemical ratiometric approach based on the metal−organic framework composites is expected to be a valuable strategy for detection of other analytes.
研究领域:
分析化学
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生物传感器
·
神经化学
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电分析化学
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纳米材料
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药物分析
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 123
·101982-101988
·
IF 3.84
Chang Liu,Bing Yan
Heterostructured chemosensors have excellent chemical stability, low contamination and excellent recyclability, and are regarded as a promising new generation of sensors with critical properties related to their sensing sensitivity and selectivity. Our preparation strategy for a heterostructured sensor is to construct it using a luminescent lanthanide complex and metal organic framework (MOF). A heterogeneous sensor is systematically produced using EuTTA and ZIF-8 to cover silica, and thin particles are obtained with small size and uniform morphology. Then, the particles were used as a highly selective and sensitive sensor to detect Cu2+ in aqueous solution. Eventually, we find that the well-structured silica@EuTTA@ZIF-8 microspheres have a good fluorescence stability, low detection limit and broad linear range in aqueous environments. These excellent properties make it a potential chemosensor for sensing of Cu2+ in environmental or biological solution systems.
研究领域:
分析化学
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环境监测
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生物传感
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材料科学
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无机化学
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纳米技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 12
·11953-11960
·
IF 1.5
Benzhi Liu,Jinlong Yan,Min Wang,Xiangyang Wu
Molecularly imprinted polymers were prepared on the surface of acrylamide-functionalized multi-walled carbon nanotubes by thermal polymerization, which using nonylphenol as template molecule, methacrylic acid as functional monomer and ethyleneglycol dimethacrylate as crosslinking agent. The molecularly imprinted polymers were modified on the surface of glassy carbon electrode to prepare electrochemical sensor. The proposed sensor showed a linear range of 0.1 to 30 μM with a detection limit of 0.02 μM. The sensor exhibited good stability, selectivity and high sensitivity to nonylphenol detection. It was successfully applied to detect nonylphenol in water samples.
研究领域:
分析化学
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环境监测
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材料科学
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电化学
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传感器技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xia Zhang,Qiumin Cao,Zhuohuan Guo,Meiyue Zhang,Meng Zhou,Zhenzhen Zhai,Yuandong Xu
MoS 2 nanosheet arrays grown on functional pomelo peel derived carbon (PPC) is constructed via in situ self-assembly method. The obtained MoS 2 /PPC composite is further used to fabricate electrochemical sensor for taxifolin detection. The current response of taxifolin on MoS 2 /PPC is significantly enhanced due to the synergistic effect between MoS 2 and PPC. It is found that the charge transfer impedance and the Ohmic resistance corresponding to MoS 2 /PPC are the lowest, indicating fast electron transfer rate and good conductivity. Further investigation reveals that the redox peak current is linearly related to the concentration of taxifolin in the range of 7 × 10 −8 –1 × 10 −5 mol·L −1 and the limit of detection is calculated to be 2.3 × 10 −8 mol·L −1 (S/N = 3). In addition, no obvious interfering phenomenonhas been observed in the detection process of taxifolin, demonstrating that MoS 2 /PPC presents good selectivity toward taxifolin determination.
研究领域:
材料科学
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电化学
·
分析化学
·
纳米技术
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生物传感器
·
环境监测
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 2
·1556-1567
·
IF 1.5
Zhihong Yan,Bo Fu,Jincheng Chen,Tailin Liu,Kang Li
Bisphenol A (BPA) was successfully electrodeposited on glassy carbon electrode modified with the chitosan-graphene (Chit-GR/GCE) by multiple sweep voltammetry under ultraviolet (UV) irradiation. The experimental conditions of the BPA deposits and the probable oxidation mechanism were investigated. Two oxidation peaks (peakII=0.12 V, peakIII=0.20 V) appeared in a suitable potential range of 0.0V and 0.2V at the Chit-GR/GC eletrode in the presence of UV light, and it could be seen that the oxidation peak current increased with the increase of UV irradiation time. The emerging peakIII was reported firstly in the work, which showed that the Chit-GR modified electrode had catalytic activity on the oxidation of BPA. Based on the oxidation peak (III) of BPA oxidative porducts on the Chit-GR/GC electrode under UV irradiation, the electrochemical sensor was fabiracated for determination of BPA. The calibration curve was obtained in the range of 5.0 to 200.0 μM with the limit of detection of 0.34 μM (S/N=3) and the response sensitivity of 0.33 μA μM -1 , which was higher than those of the method of determining BPA based on the direct oxidtation of BPA (0.98 μM (S/N=3), 0.12 μA μM -1 ). It was applied successfully for determination of BPA in lake, soil and plastic bottle samples. The new strategy, based on anodic electrodeposition and photocatalytic oxidation of BPA oxidation porducts, was provided for determination of BPA under UV irradiation. It was green, evironmental and effective.
研究领域:
分析化学
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环境监测
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电化学传感
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污染物检测
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材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Baoqin Mu,Bin Li,Bin Qi
Lanthanide metal–organic framework Ln-MOFs(Ln = Sm, Dy, Dy/Sm) were synthesized by hydrothermal method at 100 °C for 12 h using lanthanide metals (Ln = Sm, Dy, Dy/Sm) as metal ion centers and 1,3,5-benzotrioic acid (H 3 BTC) as ligands. The structural characteristics of Ln(BTC)(H 2 O)·(DMF) were characterized by X-ray Diffraction(XRD), Fourier Transform Infrared Spectroscopy(FT-IR) and Thermogravimetric Analysis(TGA). Scanning electron microscopy showed that the samples showed rod-like morphology, and the fluorescence spectra showed 478 nm and 573 nm corresponding to the characteristic transitions of 4 F 9/2 → 6 H 15/2 (blue light) and 4 F 9/2 → 6 H 13/2 (yellow light) of Dy 3+ , respectively, while orange light at 600 nm and red light at 646 nm corresponded to the characteristic transitions of 4 G 5/2 → 6 H 7/2 and 4 G 5/2 → 6 H 9/2 of Sm 3+ , demonstrating that the double-doped lanthanide metal ions MOF were successfully synthesized. H 7 (P(Mo 2 O 7 ) 6 )/(Dy/Sm-MOF) was used as a sensor for the determination of H 2 PO 4 − , the results of performance evaluation showed that the electrochemical sensor showed a linear relationship between 0.01 and 0.17 mM for H 2 PO 4 − , with a detection limit of 0.005 mM/L, good stability and reproducibility, which opened up a new way for the detection of orthophosphate dihydrogen.
研究领域:
分析化学
·
材料科学
·
电化学
·
无机化学
·
传感器技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 86
·46208-46213
·
IF 3.708
Yuqing Lin,Lianglu Hu,Linbo Li,Keqing Wang
This study describes a facile and effective one-pot route to synthesize structurally uniform and electrochemically active nickel hydroxide–graphene nanocomposites (Ni(OH)2–GN) and investigates the electrocatalytic activity toward the oxidation of insulin. Graphene here was used to tether Ni2+ precursor onto surfaces and eventually grow Ni(OH)2 nanoparticles to form hybrid materials. The synthetic Ni(OH)2–GN nanocomposite has a uniform surface distribution, which was characterized with scanning electron microscopy (SEM). Moreover, the composition of synthetic Ni(OH)2–GN nanocomposite was characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR spectra). The Ni(OH)2–GN were electrochemically treated in 0.1 M NaOH solution through cyclic voltammograms, and then gradually transited into nickel oxyhydroxide–graphene nanocomposites (NiOOH–GN), which demonstrated high catalytic activity and improved stability to insulin oxidation. The steady-state current response increases linearly with insulin concentration from 800 nM to 6400 nM with a fast response time of less than 2 s and a detection limit of 200 nM. The excellent performance of insulin sensor, including long term stability, can be ascribed to the synergistic effects of the large surface area (resulting in high loading ability), dispersing ability and conductivity of graphene and the large surface-to-volume ratio and electrocatalytic activity of Ni(OH)2 nanoparticles.
研究领域:
生物医学工程
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电化学传感
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纳米医学
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糖尿病诊断
·
分子诊断
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2015
·
IF 2.729
Tingxuan Wu,Zhiguang Liu,Yujing Guo,Chuan Dong
In this work, a simple and highly sensitive electrochemical method was developed to detect luteolin based on thio-β-cyclodextrin functionalized graphene/gold nanoparticles modified glassy carbon electrode (SH-β-CD-GNs/AuNPs/GCE). The peak currents of luteolin on the SH-β-CD-GNs/AuNPs/GCE can be greatly enhanced compared to the SH-β-CD-GNs/GCE and the bare GCE. It suggests that the nanocomposite not only shows the excellent electrical properties of GNs and AuNPs but also exhibits higher enrichment ability of cyclodextrins via the host-guest interaction between cyclodextrin and luteolin . At the SH-β-CD-GNs/AuNPs/GCE, the peak currents increased linearly with the concentration of luteolin in the range of 10.0 pM to 10.0 μM. The detection limit was estimated to be 3.3 pM (S/N = 3), which was more sensitive or comparable with the previous electrochemical sensors for luteolin detection. The analytical performance of this sensor has been evaluated for the detection of luteolin in human serum with satisfactory results. Furthermore, the method might open up a new possibility by using the nanohybrids to monitor other flavonoids which can form host–guest complexes with cyclodextrins.
研究领域:
分析化学
·
纳米生物技术
·
电分析化学
·
药物代谢
·
生物传感器
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Hongyuan Zhao,Huina Ma,Xiaoguang Li,Binbin Liu,Runqiang Liu,Sridhar Komarneni
We report a simple and highly efficient preparation of nanocomposite of halloysite (Hal) nanotubes/multi-walled carbon nanotubes (Hal-MWCNTs) and its electrochemical sensor application for the determination of methyl parathion (MP). The phase structure and surface morphology of the Hal-MWCNTs nanocomposite were confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectra. According to the electrochemical tests, the fabricated glassy carbon electrode (GCE) sensor with Hal and multi-walled carbon nanotubes showed excellent MP determination performance because of the synergistic effect of Hal and multi-walled carbon nanotubes . The Hal-MWCNTs/GCE sensor exhibited a relatively low detection limit of 0.034 μM in the linear range of 0.5–11 μM. When used for the determination of MP in real samples, the Hal-MWCNTs/GCE sensor showed good detection effect with satisfactory relative standard deviation (RSD) of 2.46 to 3.08% and recoveries of 98.8 of 101.8%. This work indicated that the nanocomposite of Hal-MWCNTs when coated on GCE is useful for the fabrication of high-performance MP electrochemical sensor.
研究领域:
分析化学
·
环境监测
·
纳米材料科学
·
电化学
·
食品安全
·
毒理学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2021
·
IF 7.328
Hongyuan Zhao,Bo Li,Runqiang Liu,Yuqi Chang,Hongliang Wang,Lin Zhou,Sridhar Komarneni
Herein, a cost-effective and scalable ultrasound assisted approach was proposed to prepare the nanocomposite of halloysite nanotubes/zirconia/carbon black (Hal/ZrO 2 /CB), which was used to fabricate a novel electrochemical sensor for the highly sensitive determination of methyl parathion (MP). In the Hal/ZrO 2 /CB nanocomposite, Hal with large specific surface area and numerous active sites could enhance the adsorption capacity and accelerate the redox reaction of MP; ZrO 2 nanoparticles with high affinity toward the phosphate group could contribute to good recognition performance for MP; CB nanoparticles with good dispersibility formed an interconnected pearl-chain-like conductive network. Benefitting from the synergistic effect of the three components, the Hal/ZrO 2 /CB/GCE (glassy carbon electrode) sensor showed a remarkably low detection limit of 5.23 nM in a good linear MP detection range of 0.01–10 μM. The Hal/ZrO 2 /CB/GCE sensor possessed a pretty decent practicality with satisfactory RSD and recovery results for the determination of MP in peach, pear, and apple juices. Therefore, the Hal/ZrO 2 /CB/GCE sensor has important implication on the quite sensitive detection of MP.
研究领域:
分析化学
·
纳米科学与技术
·
环境监测
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食品安全
·
电化学传感
·
农药残留检测
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Lei Sun,Meng Yang,Hao Guo,Tingting Zhang,Ning Wu,Mingyue Wang,Fan Yang,Junye Zhang,Wu Yang
Herein, covalent organic framework (COF) and covalent triazine framework (CTF) have been successfully combined for electrochemical sensing via carboxylated multi-walled carbon nanotubes (COOH-MWCNTs). The COF was synthesized from 1,3,5-tris-(4-formylphenyl) benzene (TFPB) and benzidine (BD), named TFPB-BD-COF. Meanwhile, CTF was synthesized by 1, 4-dicyanobenzene (DCB), then chemically activated with KOH at 700 °C to obtained chemically activated porous product, caCTF-1–700. A novel electrochemical sensor based on TFPB-BD-COF/caCTF-1–700/COOH-MWCNT composite was constructed for simultaneous detection of acetaminophen (ACOP) and 4-aminophenol (4-AP). The electrochemical behaviors of the ACOP and 4-AP on the TFPB-BD-COF/caCTF-1–700/COOH-MWCNT electrode were explored via differential pulse voltammetry (DPV) and cyclic voltammetry (CV). The fabricated TFPB-BD-COF/caCTF-1–700/COOH-MWCNT composite modified glassy carbon electrode (GCE) possessed outstanding electrocatalytic performance for the electro-oxidation of acetaminophen (ACOP) and 4- aminophenol (4-AP). Under optimal conditions, the linear ranges were 0.6–150 μM for ACOP and 4-AP, respectively, with the low detection limits of 0.053 μM and 0.075 μM, respectively. In addition, it also showed excellent selectivity, repeatability, reproducibility and stability. The proposed modified electrode was applied for the determination of ACOP and 4-AP in acetaminophen tablet and Yellow river water and obtained satisfactory recovery between 96.31~103.96% and 97.2~101.6%, respectively.
研究领域:
分析化学
·
电化学
·
生物传感器
·
药物分析
·
环境监测
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）