Increased photocorrosion resistance of ZnO foams via transition metal doping.

ABSTRACT: ZnO is a widely studied photocatalyst, but practical use is hindered by its low resistance to photocorrosion in water, which leads to metal leaching and loss of performance over time. In this work, highly porous and mechanically stable ZnO foams, called MolFoams, were doped by adding 1% or 2% Co, Ni or Cu salts to the starting Zn salt, followed by air insufflation during a sol-gel rection and sintering. The resulting doped foams showed a major increase in stability, with a 60-85% reduction in Zn²⁺ leaching after irradiation, albeit with a reduction in photocatalytic activity. A systematic analysis using XRD, Raman, XPS and XANES allowed for the identification of dopant species in the foams revealing the presence of Co₃O₄, NiO and Cu₂O within the

SUBMITTER: Warren Z 

PROVIDER: S-EPMC9844254 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature