Construction of an ultra-sensitive electrochemical sensor based on polyoxometalates decorated with CNTs and AuCo nanoparticles for the voltammetric simultaneous determination of dopamine and uric acid

Bai, Zhenyuan; Gao, Ning; Xu, Hengbin; Wang, Xinming; Tan, Lichao; Pang, Haijun; Ma, Huiyuan

doi:10.1007/s00604-020-04446-w

Cited by 18 publications

(6 citation statements)

References 43 publications

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“…Differential pulse voltammetry (DPV) was employed to explore the electrocatalytic oxidation behaviors of ZnO/ CNTs/CC for simultaneous and individual determination of glucose, UA, and H 2 O 2 , which can be attributed to the better resolution and higher current sensitivity compared to CV [20]. Figure 4 shows the DPV response of ZnO/CNTs/CC towards the individual determination of glucose, UA, and H 2 O 2 , respectively.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

ZnO nanorods anchored on CNTs incorporating carbon cloth flexible electrode as a highly sensitive electrochemical sensor

Shi

Chen

et al. 2023

Nanotechnology

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Monitoring glucose, uric acid (UA) and hydrogen peroxide (H2O2) concentration has emerged as a critical health care issue to prevent acute complications and to minimize the hazard of long-term complications. In this paper, a novel non-enzyme electrochemical sensor was proposed with nanorod-like zinc oxide anchored on carbon nanotubes using direct precipitation method and then decorated on carbon cloth (ZnO/CNTs/CC). The ZnO/CNTs composite was characterized by X-ray photoelectron spectroscopy (XPS), Raman spectrum, TEM microscope and electrochemistry. Sensing of UA, glucose and H2O2 individually or simultaneously was done on ZnO/CNTs/CC electrode, and the superior performance lies in its wide linear range, low detection limit and high selectivity, which is attributed to the synergistic effect of (a) the good electrocatalytic activity of ZnO nanorods, and (b) the large surface area with high conductivity offered by CNTs. Moreover, the ZnO/CNTs/CC electrode was manifested nice reproducibility, stability and selectivity. Importantly, the developed sensor platform has been successfully applied to probe glucose, UA and H2O2 in human serum with satisfactory recoveries. Therefore, our proposed approach is simple in aspect of fabrication and operation, which provides a straightforward assay for reliable and cost-effective determination of glucose, UA and H2O2 in clinical diagnosis and biomedical applications.

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Section: Electrochemical Measurementmentioning

confidence: 99%

ZnO nanorods anchored on CNTs incorporating carbon cloth flexible electrode as a highly sensitive electrochemical sensor

Shi

Chen

et al. 2023

Nanotechnology

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“…Polyoxometalates (POMs) constitute a class of unique metal oxide cluster compounds and display a variety of advantages, including remarkable redox abilities, modification and easy organic grafting [15,16]. At present, electrochemical sensors based on POMs have been widely used for the detection of Cr 6+ , nitrite, bisphenol A, dopamine, uric acid and L-tryptophan [17][18][19][20][21]. In addition, POMs not only have good development in electrochemistry but also exhibit a broad application prospect in biology, batteries and magnetism.…”

Section: Introductionmentioning

confidence: 99%

Design and Application of Thymol Electrochemical Sensor Based on the PtNPs-CPOFs-MWCNTs Composite

Zhang

Cui

et al. 2023

Molecules

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In this study, the preparation of covalent polyoxometalate organic frameworks (CPOFs) is introduced using the idea of polyoxometalate and covalent organic frameworks. Firstly, the prepared polyoxometalate was functionalized with an amine group (NH2-POM-NH2), and then the CPOFs were prepared by a solvothermal Schiff base reaction with NH2-POM-NH2 and 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde (Tp) as monomers. After the incorporation of PtNPs and MWCNTs into the CPOFs material, the PtNPs-CPOFs-MWCNTs nanocomposites, which possess excellent catalytic activity and electrical conductivity, were formed and utilized as new electrode materials for the electrochemical thymol sensors. The obtained PtNPs-CPOFs-MWCNTs composite exhibits excellent activity toward thymol, which is attributable to its large special surface area, good conductivity and the synergistic catalysis of each component. Under optimal experimental conditions, the sensor presented a good electrochemical response to thymol. The sensor shows two good linear relationships between the current and thymol concentration in the range of 2–65 μM (R2 = 0.996) and 65–810 μM (R2 = 0.997), with the corresponding sensitivity of 72.7 μA mM−1 and 30.5 μA mM−1, respectively. Additionally, the limit of detection (LOD) was calculated to be 0.2 μM (S/N = 3). At the same time, the prepared thymol electrochemical sensor revealed superior stability and selectivity. The constructed PtNPs-CPOFs-MWCNT electrochemical sensor is the first example of thymol detection.

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“…The low concentration of DA may be associated with several neuropsychiatric disorders, such as Parkinson’s diseases and neuromuscular disorders, while an overdose of DA can cause the increase of heart rates and blood pressure . Uric acid (UA) is generated by kidneys and could be exploited as an important biomarker in the human biological system . The excessive concentration of UA could be related with numerous clinical diseases, including gout, hyperuricemia, and stroke .…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Surface Modification of Graphene-Based Hybrids as Nanozyme Sensors for Simultaneous Detection of Dopamine and Uric Acid

Liu

Yan

et al. 2022

ACS Appl. Nano Mater.

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Development of hybrid nanozymes with high catalytic efficiency is of critical importance for enzyme mimics in biological catalytic fields. Herein, we reported a polydopamine (PDA) surface modification-assisted pyrolysis strategy for preparing CoO nanoparticles/N-doped carbon sheets/reduced graphene oxide composites (CoO/N-CS-rGO). In this strategy, PDA with abundant amines and imines could serve as an eco-friendly N-contained precursor and a connecting agent between GO matrix and CoO. Due to the superior conductivity of N-CS-rGO, synergistic catalysis between CoO nanoparticles (NPs) and N-CS-rGO, and intrinsic oxidase-like characteristic, the CoO/N-CS-rGO was used as an ultrasensitive signal amplification platform for simultaneously analyzing dopamine (DA) and uric acid (UA) in a neutral solution. Significantly, the fabricated electrochemical sensor showed ultrahigh sensitivities of 1378 μA mM–1 for DA and 1393 μA mM–1 for UA. The linear range of 0.5–110 μM for DA and 1–125 μM for UA could be obtained by this sensor. Furthermore, the stability and selectivity of the CoO/N-CS-rGO-based hybrid biosensor were evaluated. The results showed that the biosensor performed good stability and brilliant selectivity against interfering analytes. Also, the CoO/N-CS-rGO/GCE was adopted to monitor two analytes in human serum samples with high accuracy. This work provides an efficient PDA-assisted synthetic strategy to prepare hybrid nanomaterials and shows broad prospects for biosensing, biotechnology, and clinical diagnosis.

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Construction of an ultra-sensitive electrochemical sensor based on polyoxometalates decorated with CNTs and AuCo nanoparticles for the voltammetric simultaneous determination of dopamine and uric acid

Cited by 18 publications

References 43 publications

ZnO nanorods anchored on CNTs incorporating carbon cloth flexible electrode as a highly sensitive electrochemical sensor

ZnO nanorods anchored on CNTs incorporating carbon cloth flexible electrode as a highly sensitive electrochemical sensor

Design and Application of Thymol Electrochemical Sensor Based on the PtNPs-CPOFs-MWCNTs Composite

Bioinspired Surface Modification of Graphene-Based Hybrids as Nanozyme Sensors for Simultaneous Detection of Dopamine and Uric Acid

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