scholarly journals Direct As(V) Determination Using Screen-Printed Electrodes Modified with Silver Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1280
Author(s):  
Karina Torres-Rivero ◽  
Clara Pérez-Ràfols ◽  
Julio Bastos-Arrieta ◽  
Antonio Florido ◽  
Vicenç Martí ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Carbon Nanofiber ◽  
Tap Water ◽  
Anodic Stripping Voltammetry ◽  
Direct Determination ◽  
Ag Nps ◽  
Screen Printed Electrodes ◽  
Screen Printed

Carbon-nanofiber-based screen-printed electrodes modified with silver nanoparticles (Ag-NP-SPCNFEs) were tested in a pioneering manner for the direct determination of As(V) at low μg L−1 levels by means of differential pulse anodic stripping voltammetry. Screen-printed electrodes were modified with two different types of Ag-NPs, nanoseeds (NS), and nanoprisms (NPr) and characterized both microscopically and electrochemically. Furthermore, after optimizing the direct voltammetric determination of As(V), the analytical performance of considered sensors was compared for the direct determination of As(V). These results suggest that Ag-NS offer a better analytical response compared to Ag-NPr, with a detection and quantification limit of 0.6 and 1.9 µg L−1, respectively. The proposed methodology was validated using a spiked tap water sample with a very high reproducibility and good agreement with inductively coupled plasma-mass spectrometry (ICP-MS) measurements.

scholarly journals Green Synthesis of Ag Nanoparticles Using Grape Stalk Waste Extract for the Modification of Screen-Printed Electrodes

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 946 ◽  
Author(s):  
Julio Bastos-Arrieta ◽  
Antonio Florido ◽  
Clara Pérez-Ràfols ◽  
Núria Serrano ◽  
Núria Fiol ◽  
...  
Keyword(s):  
Volume Ratio ◽  
Average Diameter ◽  
Effect Of Temperature ◽  
Ag Nps ◽  
Total Polyphenols ◽  
Screen Printed Electrodes ◽  
Waste Extract ◽  
Solution Volume ◽  
Screen Printed

The chemical synthesis of silver nanoparticles (Ag-NPs) by using an environmentally friendly methodology for their preparation is presented. Thus, considering that plants possess components that can act as reducing agents and stabilizers in nanoparticles’ production, the synthesis of Ag-NPs by using an extract aqueous solution of grape stalk waste as a reducing and capping agent is studied. First, the total polyphenols and reducing sugars contained in the produced extracts at different conditions are characterized. After that, Ag-NPs are synthesized regarding the interaction of Ag ions (from silver nitrate) and the grape stalk extract. The effect of temperature, contact time, extract/metal solution volume ratio and pH solution in the synthesis of metal nanoparticles are also studied. Different sets of nanoparticle samples are characterized by means of Electron Microscopy coupled with Energy Dispersive X-Ray for qualitative chemical identification. Ag-NPs with an average diameter of 27.7 ± 0.6 nm are selected to proof their suitability for sensing purposes. Finally, screen-printed electrodes modified with Ag-NPs are tested for the simultaneous stripping voltammetric determination of Pb(II) and Cd(II). Results indicate good reproducibility, sensitivity and limits of detection around 2.7 µg L−1 for both metal ions.

On‐Site Determination of Carbendazim, Cathecol and Hydroquinone in Tap Water Using a Homemade Batch Injection Analysis Cell for Screen Printed Electrodes

2014 ◽  
Vol 27 (2) ◽  
pp. 271-275 ◽  
Author(s):  
Ricardo Pini Caramit ◽  
Bruno Gabriel Lucca ◽  
Valdir Souza Ferreira ◽  
Rodrigo Alejandro Abarza Munoz ◽  
Eduardo Mathias Richter ◽  
...  
Keyword(s):  
Tap Water ◽  
Screen Printed Electrodes ◽  
Screen Printed

scholarly journals Green Synthesis of Ag Nanoparticles Using Grape Stalk Waste Extract for the Modification of Screen-Printed Electrodes

2018 ◽  
Author(s):  
Julio Bastos-Arrieta ◽  
Antonio Florido ◽  
Clara Pérez-Ràfols ◽  
Núria Serrano ◽  
Núria Fiol ◽  
...  
Keyword(s):  
Volume Ratio ◽  
Average Diameter ◽  
Effect Of Temperature ◽  
Ag Nps ◽  
Screen Printed Electrodes ◽  
Grape Waste ◽  
Waste Extract ◽  
Solution Volume ◽  
Screen Printed

The chemical synthesis of silver nanoparticles (Ag-NPs) by using an environmentally friendly methodology for their preparation is presented. Thus, considering that plants possess components that can act as reducing agents and stabilizers in the nanoparticles production, in this work, the synthesis of Ag-NPs by using a solution of grape waste extract as reducing and capping agent is studied. First, the total polyphenols content and reducing sugars in extracts produced at different conditions are characterized. After that, Ag-NPs are synthesized regarding the interaction of Ag ions (from silver nitrate) and the grape waste extract. The effect of temperature, contact time, extract/metal solution volume ratio and pH solution in the synthesis of metal nanoparticles are studied too. Different sets of nanoparticle samples are fully characterized by means of Electron Microscopy coupled with Energy Dispersive X-Ray for qualitative chemical identification. Ag-NPs with an average diameter of 27.7 ± 0.6 nm are selected to proof their suitability for sensing purposes. Thus, screen-printed electrodes modified with Ag-NPs are tested for the simultaneous voltammetric stripping determination of Pb(II) and Cd(II). Results indicate good reproducibility, sensitivity and limits of detection around 2.7 µg L−1 for both metal ions.

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