A voltammetric sensor on the basis of bismuth nanoparticles prepared by the method of gas condensation

Малахова, Н. А.; Мысик, А. А.; Saraeva, S. Yu.; Stozhko, N. Yu.; Уймин, М. А.; Ермаков, А. Е.; Брайнина, Х. З.

doi:10.1134/s1061934810060158

Cited by 23 publications

(12 citation statements)

References 32 publications

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“…The response has its highest value at the accumulation potentials within the range from −0.5 to −0.6 V. This can be explained by electrochemical transformations of bismuth nanoparticles localized on the CSPE surface, which were described in 5. At more positive values of the accumulation potential than −0.5 V, intensive electrodissolution of bismuth from the CSPE surface occurs.…”

Section: Analytical Results Obtained For Model Solution Of 01 M Ammomentioning

confidence: 92%

“…In the last few years, electrodes modified with bismuth 1, 2 have been successfully used in ‘mercury‐free’ SV. The authors 3–5, 7 showed that sensor sensitivity and the detection limit of zinc, lead and cadmium can be improved significantly if bismuth particles as modifier become smaller. Higher sensitivity and lower detection limit of these metals are linked with an increase of the electrochemically active surface area of the bismuth modified electrode 6.…”

Section: Analytical Results Obtained For Model Solution Of 01 M Ammomentioning

confidence: 99%

“…Bismuth nanoparticles on CSPE surface are in the oxidized state 5, 7. Bismuth oxide on CSPE/Bi nano surface was reduced at the potential of −1.2 V for 300 s in a stirred solution (0.1 M NH 4 OH+0.1 M NH 4 NO 3 , pH 9.5±0.2).…”

Section: Methodsmentioning

confidence: 99%

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Bismuth Nanoparticles in Stripping Voltammetry of Sulfide Ions

2014

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For the first time, carbon screen‐printed electrodes (CSPE) modified with bismuth nanoparticles have been used to determine sulfide ions with stripping voltammetry (SV) by formation of sparingly soluble compounds with the electrode material. The impact of weight, degree of bismuth dispersion on CSPE surface, and Bi2S3 accumulation parameters on the sensitivity of the sensor have been studied. It has been established that bismuth nanoparticles (Binano) as agglomerates of about 180 nm exhibit the optimum sensory properties. The linear concentration range has been observed over the interval of 0.93–5 µM sulfide ions during the accumulation time of 75 s. A detection limit of 0.15 µM sulfide ions was achieved.

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Section: Analytical Results Obtained For Model Solution Of 01 M Ammomentioning

confidence: 92%

Section: Analytical Results Obtained For Model Solution Of 01 M Ammomentioning

confidence: 99%

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Bismuth Nanoparticles in Stripping Voltammetry of Sulfide Ions

2014

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“…Bi-NPs were synthetized modifying the procedure described by Van der Horst [25] where Bi 3+ 0.01 M was reduced by sodium borohydride 0.015 M in aerobic conditions. Aggregated Bi-NPs were vacuum-filtered using a nitrocellulose filter (pore size 0.45µm, HAWPO2500, Millipore Omnipore) and thoroughly washed with deionized water to remove impurities.…”

Section: Synthesis and Characterization Of Bismuth Nanoparticlesmentioning

confidence: 99%

“…Other possibilities explored to prepare Bi modified electrodes implies the modification of carbon electrodes with bismuth oxide [6,[16][17] or Bi-NPs [23][24][25][26][27][28]. Different solutions have been proposed to circumvent these drawbacks of direct electrodeposition of bismuth, such as screen printing a Bi nanopowder onto a conductive carbon layer [10] or drop-casting of Bi-NPs on the electrode surface [29,30].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanostructured films modified by metal nanoparticles supported on filtering membranes for electroanalysis

Paramo

Palmero

Heras

et al. 2018

Talanta

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A novel methodology to prepare sensors based on carbon nanostructures electrodes modified by metal nanoparticles is proposed. As a proof of concept, a novel bismuth nanoparticle/carbon nanofiber (Bi-NPs/CNF) electrode and a carbon nanotube (CNT)/gold nanoparticle (Au-NPs) have been developed. Bi-NPs/CNF films were prepared by 1) filtering a dispersion of CNFs on a polytetrafluorethylene (PTFE) filter, and 2) filtering a dispersion of Bi-NPs chemically synthesized through this CNF/PTFE film. Next the electrode is prepared by sticking the Bi-NPs/CNF/PTFE film on a PET substrate. In this work, Bi-NPs/CNF ratio was optimized using a Cd solution as a probe sample. The Cd anodic stripping peak intensity, registered by differential pulse anodic stripping voltammetry (DPASV), is selected as target signal. The voltammograms registered for Cd stripping with this Bi-NPs/CNF/PTFE electrode showed well-defined and highly reproducible electrochemical. The optimized Bi-NPs/CNF electrode exhibits a Cd detection limit of 53.57 ppb. To demonstrate the utility and versatility of this methodology, single walled carbon nanotubes (SWCNTs) and gold nanoparticles (Au-NPs) were selected to prepare a completely different electrode. Thus, the new Au-NPs/SWCNT/PTFE electrode was tested with a multiresponse technique. In this case, UV/Vis absorption spectroelectrochemistry experiments were carried out for studying dopamine, demonstrating the good performance of the Au-NPs/SWCNT electrode developed.

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