The chalcogenide chemical sensors on based thin films for determination of Tl+ and Hg2+ cations in fabricated and nature waters
https://doi.org/10.21266/2079-4304.2025.253.293-303
Abstract
Potentiometric ion-selective electrodes based on chalcogenide glass membranes and films have important properties. The minimum detection limit of metal cations in aqueous solutions is 10–7 mol/l, the reproducibility of the electrode function is within 10–6–10–1 mol/l. Glasses TlI-PbI2-As2Se3 and HgI2-PbI2-As2Se3 were synthesized using reagents thallium iodide, mercury (II) iodide, lead iodide of chemically pure grade, arsenic triselenide of special purity grade. Glass synthesis was carried out at a maximum temperature of 1100 °C in evacuated quartz ampoules with a residual pressure of 10–4 Pa. Upon reaching 1100 °C, the ampoules with the batch melt were kept under constant stirring for 4–6 hours, then the melt was quenched in water with ice. Films of the specified compositions were applied from glass solutions in n-butylamine. For the first time, chemical potentiometric sensors based on chalcogenide film membranes HgI2PbI2-As2Se3, TlI-PbI2-As2Se3 were obtained for determining the content of thallium (I) and mercury (II) iodides in cationic form. It has been established that the electrode properties of potentiometric chemical sensors based on TlI-PbI2-As2Se3, HgI2-PbI2As2Se3 films are determined mainly by the high content of thallium (I) and mercury (II) iodides in the chalcogenide membrane As2Se3, and to a lesser extent by the content of lead iodide. At a concentration of thallium (I) and mercury (II) iodides of 30–40 mol. % in membranes, the content of PbI2 has virtually no effect on the electrode properties.
About the Authors
D. L. Baidakov
St. Petersburg Military State Academy; St.Petersburg State Forest Technical University
Russian Federation
Russian Federation
BAIDAKOV Dmitry L. – PhD (Chemistry), Lecturer at the Department of Chemistry; Associate Professor of the Department of Chemistry
194044. Pirogovskaya emb. 1. St. Petersburg
194044. Institutskiy per. 5. St. Petersburg
O. P. Kovaleva
St.Petersburg State Forest Technical University
Russian Federation
Russian Federation
KOVALEVA Olga P. – PhD (Technical), Associate Professor of the Department of Technology of Wood and Cellulose Composite Materials, Associate Professor
194021. Institutskiy per. 5. St. Petersburg
A. V. Sheloumov
St.Petersburg State Forest Technical University
Russian Federation
Russian Federation
SHELOUMOV Andrey V. – DCs (Technical), Head of the Department of Technology of Wood and Cellulose Composite Materials, Professor
194021. Institutskiy per. 5. St. Petersburg
A. V. Felgendler
St. Petersburg Military State Academy
Russian Federation
Russian Federation
FELGENDLER Alina V. – PhD (Chemistry), Associate Professor of the Department of Chemistry, Associate Professor
194044. Pirogovskaya emb. 1. St. Petersburg
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Review
For citations:
Baidakov D.L., Kovaleva O.P., Sheloumov A.V., Felgendler A.V. The chalcogenide chemical sensors on based thin films for determination of Tl+ and Hg2+ cations in fabricated and nature waters. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2025;(253):293-303. (In Russ.) https://doi.org/10.21266/2079-4304.2025.253.293-303
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