As promising materials for photocatalysis and gas sensing, gold nanoparticles (Au NPs), silver nanoparticles (Ag NPs), and gold−silver nanoshells (GS-NSs) coated with zinc oxide (ZnO) shells (Au@ZnO, Ag@ZnO, and GS-NS@ZnO) were designed and successfully synthesized. The optical properties, morphologies, and chemical compositions of the core-shell nanoparticles were thoroughly characterized by ultraviolet-visible spectroscopy (UV-vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The UV-vis spectra revealed systematic shifts in the absorbance maxima and systematic decreases in the peak intensities when coating the Au NPs, Ag NPs, and GS-NSs with ZnO shells. Furthermore, the SEM and TEM images showed distinct changes in the particle morphologies upon ZnO shell formation. Moreover, elemental mapping by EDX confirmed the expected elemental compositions of the core-shell nanoparticles. The utility of these nanoparticles in photocatalysis and gas sensing applications will be briefly discussed.

Au@ZnO, Ag@ZnO, and GS-NS@ZnO core-shell nanoparticles for photocatalysis and gas-sensing applications

ACS Fall 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.