Anodic stripping voltammetry of silver(I) using unmodified GaN film and nanostructure electrodes

Liu, Q.Y.; Liu, B.D.; Yuan, Fang; Zhuang, Hao; Wang, C.; Shi, Dan; Xu, Yongkuan; Jiang, Xin

doi:10.1016/j.apsusc.2015.08.167

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…The common procedures for the calculation of LOD and LOQ as three and ten times the standard deviation of a blank are not well‐suited for electroanalytical techniques that exhibit a low background noise, in this case it is preferable to use the standard deviation of the intercept of the calibration curve . The LOD and LOQ achieved in our case, are highly comparable with values already reported, in the literature it has been found higher and similar limits . This allows the application of the method to samples with low concentration of ionic Ag.…”

Section: Discussionsupporting

confidence: 84%

“…This step is essential in the silver determination because silver deposits are highly stables and in many cases two electrochemical signals are obtained, this fact hinders the exact quantification of the silver ions. Several methods have been described in which acid solutions of different electrolytes are used to improve the electro‐dissolution .…”

Section: Introductionmentioning

confidence: 99%

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Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

et al. 2019

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Metallic nanoparticles can release ionic species, but also both species can occur in the same samples. Therefore, there is a need of efficient and cost‐effective methods to determine these ionic species in the presence of the corresponding nanoparticles. Electroanalytical techniques open the door to this selective detection of NPs and their ions. In this work, a methodology that allows the direct determination of ionic silver (Ag+) in the presence of silver nanoparticles based on anodic stripping voltammetry was implemented. Silver nanoparticles were determined, after acidic digestion of the sample, by difference with respect to the total content of silver. The method was validated in terms of specific identification of silver ions, linearity, working range, limit of detection, limit of quantification, recovery, repeatability and ruggedness. All parameters are adequate for an analytical method following Eurachem recommendations. The validated method was used to determine the concentration of Ag+ and total silver in two commercial products of colloidal silver. The results were compared with those obtained by atomic absorption spectrometry in combination with an ultrafiltration step for isolation of ionic silver. There were no significant differences in the results. The proposed methodology benefits from the intrinsic selectivity of the electroanalysis methods, allowing to eliminate the steps of pretreatments of the samples, which are necessary in other techniques. The novelty of the article lies in the direct determination of Ag (I) ions in the presence of AgNPs, without the use of previous separation steps.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

et al. 2019

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“…ACCEPTED MANUSCRIPT 10 The interference study was performed by adding the possible interfering common cations including Mg 2+ , Zn 2+ , Ni 2+ , Na + , Ca 2+ and K + respectively in mixture solution containing 1.0×10 -5 M Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ . The DPASV response current of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ in the absence (I 0 ) and presence (I i ) of interfering metal ions and the relative signal changes (I i /I 0 -1) are summarized in Table 2.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The electrochemical technique has been considered as a promising method for the detection of heavy metal ions due to its advantages of low cost, high sensitivity and good portability [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Rod-like hydroxyapatite and Nafion nanocomposite as an electrochemical matrix for simultaneous and sensitive detection of Hg2+, Cu2+, Pb2+ and Cd2+

Gao

Nishitani

et al. 2016

Journal of Electroanalytical Chemistry

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“…GaN nanostructures are excellent material for detecting Ag ? ion in electrochemical technology [4]. Photoelectrochemical water splitting (PEC-WS) performance of the dense and high-aspect-ratio GaN NWs are attributed to the enhancement of the light trapping effects that increases the driving force of the semiconductor photoelectrode for the creation of electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Growth behavior of GaN nanowires on c-plane sapphire substrate by applying various catalysts

et al. 2016

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Systematic reaction has been used to control the vapor-liquid-solid growth of gallium nitride nanowires (NWs) using different catalysts. GaN NWs were grown using Cu, Au, Pd/Au alloy catalysts on c-plane sapphire substrate. XRD and Raman analysis revealed the crystalline wurtzite phase of GaN synthesized at 900°C. High density GaN NWs were studied using SEM and HRTEM. Elemental composition and impurities were analyzed by EDX. Diameter of individual NW, grown using Au catalyst is found to be *50 nm. The diameter of NWs grown with the help of Cu catalyst was found to be *65 nm, whereas with Pd/Au catalyst, the diameter was about 100-200 nm. NBE emission observed from PL spectra for Cu catalyst (377 nm), Au catalyst (372 nm) as well as Pd/Au catalyst (385 nm) growth of GaN NWs respectively has been presented and discussed.

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Anodic stripping voltammetry of silver(I) using unmodified GaN film and nanostructure electrodes

Cited by 12 publications

References 36 publications

Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

Rod-like hydroxyapatite and Nafion nanocomposite as an electrochemical matrix for simultaneous and sensitive detection of Hg2+, Cu2+, Pb2+ and Cd2+

Growth behavior of GaN nanowires on c-plane sapphire substrate by applying various catalysts

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