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Chronoamperometric study of elemental sulphur (S) nanoparticles (NPs) in NaCl water solution: new methodology for S NPs sizing and detection

Bura-Nakić, Elvira; Marguš, Marija; Jurašin, Darija; Milanović, Ivana; Ciglenečki-Jušić, Irena (2015) Chronoamperometric study of elemental sulphur (S) nanoparticles (NPs) in NaCl water solution: new methodology for S NPs sizing and detection. Geochemical Transactions, 16 . pp. 1-9. ISSN 1467-4866

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Background: Elemental sulfur (S) persists in natural aquatic environment in a variety of forms with different size distributions from dissolved to particulate. Determination of S speciation mainly consists of the application of chromatographic and electrochemical techniques while its size determination is limited only to the application of microscopic and light scattering techniques. S biological and geochemical importance together with recent increases of S industrial applications requires the development of different analytical tools for S sizing and quantification. In recent years the use of electrochemical measurements as a direct, fast, and inexpensive technique for the different nanoparticles (NPs) characterization (Ag, Au, Pt) is increasing. In this work, electrochemical i.e. chronoamperometric measurements at the Hg electrode are performed for determination of the size distribution of the S NPs. Results: S NPs were synthesized in aqueous medium by sodium polysulphide acidic hydrolysis. Chronoamperometric measurements reveal the polydisperse nature of the formed suspension of S NPs. The electrochemical results were compared with dynamic light scattering measurements parallel run in the same S NPs suspensions. The two methods show fairly good agreement, both suggesting a log-normal size distribution of the S NPs sizes characterized by similar parameters. Conclusions: The preliminary results highlight the amperometric measurements as a promising tool for the size determination of the S NPs in the water environment.

Item Type: Article
Uncontrolled Keywords: elemental sulphur (S) nanoparticles; chronoamperometry; nanoparticles sizing and detection
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division for Marine and Enviromental Research
Project titleProject leaderProject codeProject type
Surfactants, processes in solutions and at interfaces (Površinski aktivne tvari, procesi u otopinama i na međupovršinama)-Maja Dutour Sikirić098-0982915-2949MZOS
Nature of organic matter, interaction with traces and surfaces in environment (Priroda organske tvari, interakcije s mikrokonstituentima i površinama u okolišu)-Irena Ciglenečki-Jušić098-0982934-2717MZOS
Kruženje sumpora i ugljika u morskom i slatkovodnom okolišuIrena Ciglenečki-JušićIP-11-2013-1205HRZZ
Depositing User: Elvira Bura Nakić
Date Deposited: 13 Jun 2016 13:39
DOI: 10.1186/s12932-015-0016-2

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