Chemical sensors based on ZnI2-PbI2-As2Se3 chalcogenide films for determining of zinc content in aquas solutions
https://doi.org/10.21266/2079-4304.2024.247.315-326
Abstract
Chalcogenide glasses and films based on arsenic selenides containing metal iodides have unique properties and great practical application. They are transparent in the IR range of the spectrum, have low sensitivity to impurities and high chemical resistance in aggressive environments. Glassy semiconductors are used in the production of equipment and devices in the optical industry, as components of biochips, as well as materials for membranes of ion-selective electrodes. To synthesize ZnI2-PbI2-As2Se3 glasses, zinc iodide (reagent grade), lead iodide (reagent grade), and arsenic triselenide (high grade) were used. Glasses were synthesized at a maximum temperature of 900 ºC in evacuated quartz ampoules. When the maximum synthesis temperature was reached, the ampoules with the melt were kept for 12 hours with constant stirring, then the melt was quenched in water with ice. Chalcogenide films ZnI2-PbI2-As2Se3 were synthesized from the solutions of chalcogenide glasses in n-butylamine and also the specific electroconductivity of films has been investigated. It was founded, that electroconductivity of chalcogenide glasses and films of a similar composition practically do not differ. For the first time, chemical sensors based on ZnI2-PbI2-As2Se3 film membranes have been obtained for the direct determination of zinc content in aqueous solutions. The lower limit of detection of Zn2+ cations for most of the studied membranes is 10–7 mol/l, and the Nernst region of the electrode function is 10–6–10–1 mol/l. Film electrodes are practically not inferior to chalcogenide glass electrodes in selectivity.
About the Authors
D. L. Baidakov
St.Petersburg State Forest University
Russian Federation
Russian Federation
BAIDAKOV Dmitry L. – DSc (Chemistry), Assistant professor
194021. Institute per. 5. St. Petersburg. Russia
N. V. Michailova
Federal State Budgetary Institution Scientific Research Center named after V.A. Almazov
Russian Federation
Russian Federation
MICHAILOVA Ninel V. – DSc (Chemistry), Assistant professor, Faculty of Medicine, Institute of Medical Education
197341. Kolomyazhsky av. 5. St. Petersburg. Russia
A. V. Sheloumov
St.Petersburg State Forest University
Russian Federation
Russian Federation
SHELOUMOV Andrey V. – DSc (Technical), Professor
194021. Institute per. 5. St. Petersburg. Russia
Yu. T. Vigranenko
St.Petersburg State Forest University
Russian Federation
Russian Federation
VIGRANENKO Yury T. – DSc (Chemical), Professor
194021. Institute per. 5. St. Petersburg. Russia
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Review
For citations:
Baidakov D.L., Michailova N.V., Sheloumov A.V., Vigranenko Yu.T. Chemical sensors based on ZnI2-PbI2-As2Se3 chalcogenide films for determining of zinc content in aquas solutions. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2024;1(247):315-326. (In Russ.) https://doi.org/10.21266/2079-4304.2024.247.315-326
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