ZnS-Intercalated Montmorillonite: A Low Cost Potentiometric Sensor

Abstract:

ZnS is well known for its potential uses, both in crystal form and powder, as optoelectronic devices and as a phosphor. In this work, we prepared ZnS-intercalated montmorillonite by the in situ solid-solid reaction between Zn (II)-montmorillonite and sodium sulfide. A potentiometric electrode was constructed from a mixture of ZnS-intercalated montmorillonite, artificial graphite, polytetrafluoroethylene (PTFE) and carboxymethylcellulose (CMC) in an appropriate ratio. The electrode was used to determine S^2- in aqueous solution, graphs of log [S^2-] vs. measured voltage gave linear relation up to 3^rd order of ion concentrations. It can be said that, this is the first time that ZnS-intercalated montmorillonite is used to construct a potentiometric electrode. Apart from a good precision, the electrode is good for its selectivity, durability and low cost.

• Periodical: Advanced Materials Research (Volume 787)
• Pages: 291-295
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.787.291
• Online since: September 2013
• Authors: Siriphorn Udkhao, Atchana Wongchaisuwat, Ladda Meesuk
• Keywords: Montmorillonite, Potentiometry, Sulfide Ion, ZnS

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