d-Glucopyranose-modified compound of Ruddlesden–Popper phases H2CaTa2O7: characterization and intercalation with Ag

Abstract

D-Glucopyranose rings have been successfully coordinated onto the interlayer surface of a Ruddlesden–Popper-type layered perovskite, H₂CaTa₂O₇, by a reaction with the precursor of n-decoxyl derivative of H₂CaTa₂O₇. The interlayer distance of D-glucopyranose derivative of H₂CaTa₂O₇ was decreased to 19.135(5) Å compared to 35.026(0) Å for n-decoxyl derivative of H₂CaTa₂O₇. IR and solid-state ¹³C CP/MAS NMR spectra indicated that the oxyalkyl chains of the precursor were replaced by glucopyranose rings. To extend inorganic–organic hybrids, the H₂CaTa₂O₇ modified was further treated with [Ag(NH₃)₂]⁺ solution. Ag nanoparticles are deposited on the interlayer of H₂CaTa₂O₇, and the interlayer distance of the samples is changed into 10.816(6) Å. The as-prepared nanohybrids (Ag/H₂CaTa₂O₇) exhibit an excellent catalytic property for the catalytic reduction of both rhodamine B (RhB) and 4-nitrophenol (4-NP) by NaBH₄ aqueous solution; therefore, it is a practical and efficient nanocatalyst.