New Adsorbents Based on InP–CdTe and CdS–CdTe Systems and Their Comparative Properties

• Published in: Protection of metals and physical chemistry of surfaces Vol. 58; no. 5; pp. 941 - 948
• Main Authors: Kirovskaya, I. A., Nor, P. E., Ekkert, A. O., Ekkert, R. V., Chernous, N. V., Kolesnikov, L. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2022; Springer Nature B.V
• Subjects: Adsorbents; Cadmium sulfide; Cadmium tellurides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Electronegativity; Energy gap; Gas analysis; Indium phosphides; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; Metallic Materials; Physicochemical Processes at the Interfaces; Solid solutions; Substitutional solid solutions; Surface properties; Tribology; Wurtzite; Zincblende
• ISSN: 2070-2051; 2070-206X
• DOI: 10.1134/S2070205122050112

Based on the known information about the main bulk properties of the initial binary compounds (InP, CdS, CdTe) and capabilities of the method of isothermal diffusion, preparation procedures of solid solutions of InP–CdTe and CdS–CdTe systems (of hetero- and homosubstitution) are developed. Based on the results of X-ray diffraction, microscopic and electron microscopic, and optical studies, the obtained solid solutions are classified as substitutional solid solutions with the structures of sphalerite and wurtzite, respectively; average sizes d av and average numbers n av of the most represented particles in the components of the systems and values of band-gap energy ∆ E of the solid solutions are determined for the first time. The acid–base properties of the surfaces of the components of the systems are studied, and their weakly acidic character at a relatively increased acidity of the surfaces of the solid solutions of the InP–CdTe system is shown. Both smooth and extreme dependences of the bulk and surface properties on the composition are determined. The found similarity and difference in the behavior of the solid solutions of the systems are explained by the predominant effect of either the common binary component (CdTe) or the first binary components (InP, CdS), which differ by the values of the band gap energy, difference of electronegativities, and fraction of the ionic bond. Considerations are expressed about the possibilities of the use of a facilitated way of searching for new adsorbents—materials for semiconductor gas analysis.