Nanoscale Hydroxyapatite for Electrochemical Sensing of Uric Acid: Roles of Mesopore Volume and Surface Acidity

2020 ◽  
Vol 3 (8) ◽  
pp. 7761-7773
Author(s):  
E. Iyyappan ◽  
S. J. Samuel Justin ◽  
P. Wilson ◽  
Arumugam Palaniappan
Keyword(s):  
Uric Acid ◽  
Surface Acidity ◽  
Electrochemical Sensing ◽  
Mesopore Volume

scholarly journals Morphology–Dependent Electrochemical Sensing Properties of Iron Oxide–Graphene Oxide Nanohybrids for Dopamine and Uric Acid

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 835 ◽  
Author(s):  
Zhaotian Cai ◽  
Yabing Ye ◽  
Xuan Wan ◽  
Jun Liu ◽  
Shihui Yang ◽  
...  
Keyword(s):  
Uric Acid ◽  
Graphene Oxide ◽  
Iron Oxide ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Simultaneous Detection ◽  
Electrochemical Sensing ◽  
Electrochemical Performances ◽  
Hydrothermal Route ◽  
Sensing Properties

Various morphologies of iron oxide nanoparticles (Fe2O3 NPs), including cubic, thorhombic and discal shapes were synthesized by a facile meta-ion mediated hydrothermal route. To further improve the electrochemical sensing properties, discal Fe2O3 NPs with the highest electrocatalytic activity were coupled with graphene oxide (GO) nanosheets. The surface morphology, microstructures and electrochemical properties of the obtained Fe2O3 NPs and Fe2O3/GO nanohybrids were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. As expected, the electrochemical performances were found to be highly related to morphology. The discal Fe2O3 NPs coupled with GO showed remarkable electrocatalytic activity toward the oxidation of dopamine (DA) and uric acid (UA), due to their excellent synergistic effect. The electrochemical responses of both DA and UA were linear to their concentrations in the ranges of 0.02–10 μM and 10–100 μM, with very low limits of detection (LOD) of 3.2 nM and 2.5 nM for DA and UA, respectively. Moreover, the d-Fe2O3/GO nanohybrids showed good selectivity and reproducibility. The proposed d-Fe2O3/GO/GCE realized the simultaneous detection of DA and UA in human serum and urine samples with satisfactory recoveries.

A Highly Sensitive Nanostructure-Based Surface Covalently Modification of Gold for Electrochemical Sensing of Epinephrine in Presence of Uric Acid and Acetaminophen

2012 ◽  
Vol 160 (2) ◽  
pp. H126-H131 ◽  
Author(s):  
Zohreh Moghadam ◽  
Sayed Mehdi Ghoreishi ◽  
Mohsen Behpour ◽  
Mohammadhassan Motaghedifard
Keyword(s):  
Uric Acid ◽  
Electrochemical Sensing ◽  
Highly Sensitive

Improved host–guest electrochemical sensing of dopamine in the presence of ascorbic and uric acids in a β-cyclodextrin/Nafion®/polymer nanocomposite

2014 ◽  
Vol 6 (15) ◽  
pp. 5962-5971 ◽  
Author(s):  
Nada F. Atta ◽  
Ahmed Galal ◽  
Shimaa M. Ali ◽  
Dalia M. El-Said
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Gold Electrode ◽  
Polymer Nanocomposite ◽  
Electrochemical Sensing ◽  
Voltammetric Method

A voltammetric method based on a combination of β-cyclodextrin, Nafion® and a gold electrode modified with poly(3,4-ethylene-dioxythiophene) has been successfully developed for the determination of dopamine in the presence of ascorbic acid or uric acid.

Electrochemical Sensing of Uric Acid Using Glassy Carbon Modified with Multiwall Carbon Nanotubes Dispersed in Polyethylenimine

2014 ◽  
Vol 26 (10) ◽  
pp. 2191-2196 ◽  
Author(s):  
Alejandro Gutiérrez ◽  
Maria L. Lozano ◽  
Laura Galicia ◽  
Nancy F. Ferreyra ◽  
Gustavo A. Rivas
Keyword(s):  
Carbon Nanotubes ◽  
Uric Acid ◽  
Glassy Carbon ◽  
Multiwall Carbon Nanotubes ◽  
Electrochemical Sensing ◽  
Multiwall Carbon

Uric acid electrochemical sensing in biofluids based on Ni/Zn hydroxide nanocatalyst

2020 ◽  
Vol 187 (7) ◽  
Author(s):  
Nathália F. B. Azeredo ◽  
Josué M. Gonçalves ◽  
Pamela O. Rossini ◽  
Koiti Araki ◽  
Joseph Wang ◽  
...  
Keyword(s):  
Uric Acid ◽  
Electrochemical Sensing

Highly Selective Electrochemical Sensing of Dopamine, Xanthine, Ascorbic Acid and Uric Acid Using a Carbon Fiber Paper

2020 ◽  
Vol 20 (19) ◽  
pp. 11707-11712
Author(s):  
Jaligam Murali Mohan ◽  
Khairunnisa Amreen ◽  
Arshad Javed ◽  
Satish Kumar Dubey ◽  
Sanket Goel
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Fiber ◽  
Electrochemical Sensing ◽  
Carbon Fiber Paper
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