ZnS-Montmorillonite: An Application as Electrochemical Sensor
| Autor: | Atchana Wongchaisuwat, Ladda Meesuk, Siriphorn Udkhao |
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| Rok vydání: | 2013 |
| Předmět: |
Working electrode
Materials science Standard hydrogen electrode Mechanical Engineering Inorganic chemistry Absolute electrode potential Analytical chemistry Glass electrode Reference electrode law.invention Quinhydrone electrode Mechanics of Materials law Palladium-hydrogen electrode Reversible hydrogen electrode General Materials Science |
| Zdroj: | Key Engineering Materials. 538:312-315 |
| ISSN: | 1662-9795 |
| Popis: | Sensors based on clay-modified electrode have been studied extensively. They have been made from different intercalation compounds to determine both organic and inorganic species. Various analytical techniques have been applied for clay-modified electrodes. In this work, we used ZnS-montmorillonite as a sensor to construct an electrochemical electrode or potentiometric electrode by mixing ZnS-montmorillonite with graphite, polytetrafluoroethylene (PTFE) and carboxymethylcellulose (CMC) in an appropriate ratio. It was found that, the electrode gave best response to sulfide ion compared with other ions. The graph plotted between potential in mV against log[S2-] gave slope near 29.5 due to Nernst equation. The pH studied showed that the potential was almost constant at pH 4-11 and pH 4-9 in 0.01 M and 0.001 M of S2- solutions, respectively. This implied that the sensor could be used at a wide range of pH. The electrode also gave good precision. |
| Databáze: | OpenAIRE |
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