Modulating the Assembly of Sputtered Silver Nanoparticles on Screen-Printed Carbon Electrodes for Hydrogen Peroxide Electroreduction: Effect of the Surface Coverage

2016 ◽  
Vol 199 ◽  
pp. 187-193 ◽  
Author(s):  
Xiangheng Niu ◽  
Libo Shi ◽  
Jianming Pan ◽  
Fengxian Qiu ◽  
Yongsheng Yan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Surface Coverage ◽  
Carbon Electrodes ◽  
Hydrogen Peroxide Electroreduction ◽  
Screen Printed

Fabrication of Metal Nanoparticle-Modified Screen Printed Carbon Electrodes for the Evaluation of Hydrogen Peroxide Content in Teeth Whitening Strips

2015 ◽  
Vol 92 (11) ◽  
pp. 1913-1917 ◽  
Author(s):  
Adriana Popa ◽  
Eric C. Abenojar ◽  
Adam Vianna ◽  
Czarina Y. A. Buenviaje ◽  
Jiahua Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Nanoparticle ◽  
Carbon Electrodes ◽  
Peroxide Content ◽  
Screen Printed

scholarly journals Silver Nanoparticles Coupled with Graphene Nanoplatelets Modified Screen-Printed Carbon Electrodes for Rhodamine B Detection in Food Products

ACS Omega ◽  
2021 ◽  
Author(s):  
Andi Eka Kartika ◽  
Henry Setiyanto ◽  
Robeth Viktoria Manurung ◽  
Siti Nurul Aisyiyah Jenie ◽  
Vienna Saraswaty
Keyword(s):  
Silver Nanoparticles ◽  
Rhodamine B ◽  
Food Products ◽  
Graphene Nanoplatelets ◽  
Carbon Electrodes ◽  
Screen Printed

scholarly journals Development of Hydrogen Peroxide Biosensor Based on Immobilization of Hemoglobin on Screen-Printed Carbon Electrode Modified With Silver Nanoparticles

2019 ◽  
pp. 2332-2340
Author(s):  
Ali Saad Elewi ◽  
Shatha Abdul Wadood ◽  
Abdul Kareem Mohammed Ali
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Phosphate Buffer Solution ◽  
Carbon Electrode ◽  
Buffer Solution ◽  
Hydrogen Peroxide Biosensor ◽  
Screen Printed Carbon Electrode ◽  
Screen Printed

     The direct electron transfer behavior of hemoglobin that is immobilized onto screen-printed carbon electrode (SPCE) modified with silver nanoparticles (AgNPs) and chitosan (CS) was studied in this work. Cyclic voltametry and spectrophotometry were used to characterize the hemoglobin (Hb) bioconjunction with AgNPs and CS. Results of the modified electrode showed quasi-reversible redox peaks with a formal potential of (-0.245V) versus Ag/AgCl in 0.1M phosphate buffer solution (PBS), pH7, at a scan rate of 0.1Vs-1. The charge transfer coefficient (α) was 0.48 and the apparent electron transfer rate constant (Ks) was 0.47s-1. The electrode was used as a hydrogen peroxide biosensor with a linear response over 3 to 240 µM and a detection limit of 0.6 µM. As a result, the modified biosensor here has exhibited a high sensitivity, good reproducibility and stability.

scholarly journals Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3741
Author(s):  
Chidiebere I. Ogbu ◽  
Xu Feng ◽  
Samson N. Dada ◽  
Gregory W. Bishop
Keyword(s):  
Hydrogen Peroxide ◽  
Electrocatalytic Activity ◽  
Carbon Materials ◽  
Limit Of Detection ◽  
Amperometric Detection ◽  
Graphite Powder ◽  
Carbon Electrodes ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Screen Printed

Nitrogen-doped carbon materials have garnered much interest due to their electrocatalytic activity towards important reactions such as the reduction of hydrogen peroxide. N-doped carbon materials are typically prepared and deposited on solid conductive supports, which can sometimes involve time-consuming, complex, and/or costly procedures. Here, nitrogen-doped screen-printed carbon electrodes (N-SPCEs) were fabricated directly from a lab-formulated ink composed of graphite that was modified with surface nitrogen groups by a simple soft nitriding technique. N-SPCEs prepared from inexpensive starting materials (graphite powder and urea) demonstrated good electrocatalytic activity towards hydrogen peroxide reduction. Amperometric detection of H2O2 using N-SPCEs with an applied potential of −0.4 V (vs. Ag/AgCl) exhibited good reproducibility and stability as well as a reasonable limit of detection (2.5 µM) and wide linear range (0.020 to 5.3 mM).

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