The electrochemical reaction mechanism of arsenic on gold analyzed by anodic stripping Square-wave voltammetry

Robles, Alicia; Vettorelo, Sabrina N.; Gerpe, Marcela Silvia; Garay, Fernando

doi:10.1016/j.electacta.2016.12.181

Cited by 16 publications

(2 citation statements)

References 34 publications

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“…DP60/20V electrode was selected to analyze As(III) ion in water via the AS‐SWV technique. [ 12 ] Figure 11 showed the SWV curves of base solution and As(III) solution, demonstrating that the adding of As(III) solution led to the appearance of characteristic anode peak at position of ‐0.3 V (vs. Ag/AgCl) and the intensity of this peak tended to increase. In comparison with base solution, the peak at ‐0.3 V revealed the existing of As(III) ion in the solution.…”

Section: Resultsmentioning

confidence: 99%

Electrophoresis deposition of Au‐nanoparticles on FTO electrode for As(III) detection

Thang,

Linh,

Anh

et al. 2023

Vietnam Journal of Chemistry

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Gold nanoparticles (AuNPs) were synthesized via redox reaction, using EDTA as a protecting and reducing agent, with HAuCl4 as precursor and seed solution. The appropriate reaction condition was found out, with the ratio of EDTA:HAuCl4 = 10:1, 40 μL of seed solution and stirring time of 5 minutes. The UV‐Vis spectroscopy observed that the appearance of two absorption peaks were at 574 and 755.5 nm with the average size of AuNPs was 64.5 nm, the zeta potential was positive. The synthesized AuNPs were deposited on FTO electrode by electrophoresis deposition. The results of solid UV‐Vis and SEM images showed that the spherical AuNPs ranging from 40 to 60 nm were deposited onto FTO to fabricate the AuNPs/FTO electrodes. The electrochemical activity of AuNPs/FTO were investigated based on the redox reaction of hydroquinone; the CV results showed the electrode with applied potential at 20 V for 60 minutes has the superior performance. The analysis of As(III) were conducted by AS‐SWV technique. The results showed that AuNPs/FTO electrode enable to detect As(III) at the concentrations higher than 5 ppb that is suitable for the WHO standard of domestic water.

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Section: Resultsmentioning

confidence: 99%

Electrophoresis deposition of Au‐nanoparticles on FTO electrode for As(III) detection

Thang,

Linh,

Anh

et al. 2023

Vietnam Journal of Chemistry

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“…Second, it is possible that As(0) atoms occupy hole positions between gold atoms on the electrode surface [53]. This would only permit As(0) coverage across 25% of the total electrode area, thus altering the calculation for monolayer coverage such that a lower is likely unnecessary in our remote sensor.…”

Section: Dps-asc Of As(iii) Standardsmentioning

confidence: 99%

An electrochemical instrument for the analysis of heavy metals in water via anodic stripping coulometry for applications in remote sensing.

Kaht¹

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their support and helpful discussions over the years. I acknowledge the faculty, staff, and colleagues who have assisted me throughout my research. Dr. Mohamed Marei for introducing me to the lab and providing me with training. Dr. Mark Crain for laser cutting and assembly of custom parts. Ms. Julia Aebersold, Mr. Curtis McKenna, and Dr. Kevin Walsh for discussions and training in microfabrication. I acknowledge the staff of the Graduate School for providing me with countless opportunities for professional development and growth. Special thanks to Dr. Paul DeMarco and Dr. Michelle Rodems for providing me with advice and guidance. I acknowledge my undergraduate research mentor, Dr. William Wetzel, for providing me with a fundamental background in chemistry, fueling my desire to pursue scientific research, and for his support and friendship. I acknowledge all my family and friends that have supported me through this journey. This would not be possible without your encouragement, love, and inspiration.

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Arsenic in Latin America: Part I

Litter

Armienta

Villanueva-Estrada

et al. 2019

Arsenic in Drinking Water and Food

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The electrochemical reaction mechanism of arsenic on gold analyzed by anodic stripping Square-wave voltammetry

Cited by 16 publications

References 34 publications

Electrophoresis deposition of Au‐nanoparticles on FTO electrode for As(III) detection

Electrophoresis deposition of Au‐nanoparticles on FTO electrode for As(III) detection

An electrochemical instrument for the analysis of heavy metals in water via anodic stripping coulometry for applications in remote sensing.

Arsenic in Latin America: Part I

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