ABSTRACT The silicate compound, PbZn 4 SiTeO 10 , was investigated for its structural flexibility and the ensuing properties. The compounds were prepared by conventional solid‐state synthesis and the phase purity was confirmed by the powder x‐ray diffraction (PXRD). Raman spectroscopy studies indicated the expected bands. XPS analysis was useful in arriving at the oxidation states in the substituted compounds. The substitution of transition metal ions (Co 2+ , Cu 2+ , and Ni 2+ ) in place of Zn 2+ ions in tetrahedral coordination results in new colored compounds, which were characterized by optical absorption spectroscopy with the help of ligand‐centered/charge‐transfer bands together with the spin‐allowed d–d transitions. The white compounds were found to exhibit a good near‐infrared (NIR) reflectivity (∼80%), which is comparable to the standard TiO 2 compound. The white compounds also exhibit reasonable dielectric constant values with low loss. Substitution of Eu 3+ ions at the Pb 2+ sites (pentagonal bi‐pyramidal coordination) results in a deep red emission, with the maximum emission intensity at 7% Eu 3+ ions substitution. The Co compound, PbZn 3 CoSiTeO 10 , exhibits good performance toward oxygen evolution reaction (OER) with values comparable to RuO 2 . The present study explored the structurally characterized PbZn 4 SiTeO 10 compound toward new colored variants, NIR‐reflectivity studies, dielectric behavior, red emission, and electrocatalytic water oxidation (OER).
Malik et al. (Thu,) studied this question.