Article ; Online: A portable electrochemical microsensor for in-site measurement of dissolved oxygen and hydrogen sulfide in natural water
Talanta. 2023 May, v. 256 p.124269-
2023
Abstract: Dissolved oxygen (O₂) and hydrogen sulfide (H₂S) are two important indicators of water quality, their levels are of intimate dependence and varying over time. It is of great significance to monitoring of dissolved O₂ and H₂S simultaneously in natural ... ...
| Abstract | Dissolved oxygen (O₂) and hydrogen sulfide (H₂S) are two important indicators of water quality, their levels are of intimate dependence and varying over time. It is of great significance to monitoring of dissolved O₂ and H₂S simultaneously in natural water, yet has not been reported because of lack of effective approaches. In this work, a portable electrochemical microsensor was developed for simultaneously quantifying dissolved O₂ and H₂S. Here, Pd@Ni nanoparticles (NPs) were self-assembled onto the microelectrode by MXene titanium carbide (Ti₃C₂Tₓ), which were of responsibility towards O₂ and H₂S detection within single electrochemical reduction process. On this regard, Pd NPs facilitated catalyzing the electrochemical reduction of O₂, while Ni NPs were employed as recognition element for H₂S detection. With the electrochemical reduction sweep, the initial application of a positive voltage rendered the Ni to be oxidized to be Ni ions, contributing to their following capture of surrounding S²⁻ to form nickel sulfide. Nickel sulfide with highly electrochemical activity were capable of generating detecting reduction current. In consequence, the as-designed microsensor can simultaneously determine O₂ concentrations ranging from 36 to 318 μM and H₂S levels ranging from 0.1 to 2.5 μM with high selectivity. Finally, the portable microsensor was successfully applied to simultaneous detection dissolved O₂ and H₂S in natural water in-site, the results of which were comparable to the classical methods. |
|---|---|
| Keywords | dissolved oxygen ; electric potential difference ; electrochemistry ; hydrogen sulfide ; nanoparticles ; nickel ; titanium ; water quality ; Electrochemical microsensor ; Oxygen ; In-site ; Natural water ; Portable |
| Language | English |
| Dates of publication | 2023-05 |
| Publishing place | Elsevier B.V. |
| Document type | Article ; Online |
| ZDB-ID | 1500969-5 |
| ISSN | 1873-3573 ; 0039-9140 |
| ISSN (online) | 1873-3573 |
| ISSN | 0039-9140 |
| DOI | 10.1016/j.talanta.2023.124269 |
| Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.