Hydrangea‐Like Meso‐/Macroporous ZnO‐CeO₂ Binary Oxide Materials: Synthesis, Photocatalysis and CO Oxidation

Abstract

A series of ZnO-CeO 2 binary oxides with a novel hydrangealike morphology and meso-/macroporous hierarchical structure of high surface area (around 100 m 2 /g) were synthesized by a simple one-pot hydrothermal process in the presence of triblock copolymer F127. Homogeneous mixing of wurtzite ZnO and cubic phase CeO 2 and the coexistence of Ce 3+ and Ce 4+ on the surface of the synthesized ZnO-CeO 2 materials were confirmed. UV/Vis diffuse reflectance spectra show that the absorption edges of the binary oxides shift remarkably to the visible range relative to those of pure ZnO and CeO 2 .

Oxidation of CO over gold supported on Zn-modified ceria catalysts

“…On the other hand, the higher the Zn contents of the support, the lower the ceria crystallite size, estimated using the Scherrer equation (figure 2). This behavior has been previously reported for modified CeO 2 and evidences that ZnO hinders mass transportation during calcination and restricts grain growth substantially [15,17,27,28].…”

The influence of mechanochemical activation on the Zn–Ce–O composition properties

“…Practically, the same data were reported by Barrios et al (2014) and Ma et al (2010). At the same time the appearance of exothermal effects without mass loss is a characteristic of the samples after mechanochemical modification ( Figure S3).…”

High-throughput continuous hydrothermal flow synthesis of Zn–Ce oxides: unprecedented solubility of Zn in the nanoparticle fluorite lattice

“…they have a very steep rise towards a plateau, even at relatively low Zn contents; Ma et al 2010). The gradual change seen herein could be as a result of good atomic or particulate mixing due to the rapid nature of the crystallization process reported herein.…”