Formation of CeO₂−ZrO₂ Solid Solution Nanocages with Controllable Structures via Kirkendall Effect

Abstract

Nanocages with controllable shapes, tunable compositions, and narrow size distributions have been synthesized by using the monodispersed ceria clusters as templates.

Nanocrystals: Solution-based synthesis and applications as nanocatalysts

“…Particular combinations of conditions are needed to prepare pure particles or wires. Cage-structured nanomaterials with hollow interiors and functional surfaces have attracted broad attention from researchers in recent years due to their great potential for the encapsulation of guest molecules and the resulting applications in various fields such as biotechnology, drug delivery, and nanometer-scale reactors [60,61]. We have [56] successfully prepared a novel hollow CeO 2 ZrO 2 nanocomposite with controllable structure by a simple solution phase process [60].…”

“…Cage-structured nanomaterials with hollow interiors and functional surfaces have attracted broad attention from researchers in recent years due to their great potential for the encapsulation of guest molecules and the resulting applications in various fields such as biotechnology, drug delivery, and nanometer-scale reactors [60,61]. We have [56] successfully prepared a novel hollow CeO 2 ZrO 2 nanocomposite with controllable structure by a simple solution phase process [60]. Monodisperse ceria nanospheres with different shapes fabricated through a hydrolysis route in glycol were used as precursors, and zirconium (IV) was added to react with the monodisperse ceria nanospheres in the glycol medium to form CeO 2 ZrO 2 nanocages utilizing the Kirkendall effect.…”

One‐Pot Synthesis of Mn‐Doped CeO2 Nanospheres for CO Oxidation

“…Preparing ceria-based materials, such as solid solutions, compound oxides, noble metal loading on ceria, and doped ceria, is an effective strategy to achieve high catalytic activity. [6][7][8] Impurity doping in ceria materials with selective elements, which can distort the lattice structure and generate oxygen vacancies by replacing Ce 4+ ions, is now emerging as a novel field of significance. [9,10] For instance, Ni 2+ doped CeO 2 is reported to reveal superior catalytic reactivity of CO oxidization compared with pure ceria, with full conversion shifting down to 150°C.…”

Size- and Shape-Controlled Synthesis of Monodisperse Metal Oxide and Mixed Oxide Nanocrystals

“…The photocatalytic property of as-synthesized hierarchical FeWO 4 microcrystals was also studied, which shows excellent photocatalytic activity for the degradation of rhodamine B. Cascales et al (Esteban-Betegoń et al 2010) has produced the tetragonal scheelite-phase Yb 3+ -doped NaGd(WO 4 ) 2 micro/nanostructures with preserved photoluminescence properties from hydrothermal preparations using metal nitrate and chloride reagents. The Li's group has successfully prepared a novel hollow CeO 2 -ZrO 2 nanocages with controlled shapes, sizes, and compositions by adding zirconium(IV) into the glycol solution containing CeO 2 nanospheres under solvothermal treatment (Liang et al 2008). The formation of cage-structured CeO 2 -ZrO 2 nanomaterials was explained by the Kirkendall effect.…”