Issue 8, 2021

Rational manufacture of yolk–shell and core–shell metal oxide double layers from silica-templated coordination polymer double layers

Abstract

Several benefits derived from the structural features of yolk–shell-type materials are well acknowledged and therefore the rational manufacture of well-designed yolk–shell materials is of great concern in material development. Herein, we report a convenient method for the selective construction of yolk–shell or core–shell-type hybrid metal oxide double layers (silica@MxOy@M′xOy; M and M′ = Er, Y, Tb, or Gd) via calcining silica-templated coordination polymer (CP) double layers (silica@MCP@M′CP), which are prepared via two-step CP growth on carboxylic acid-terminated silica microspheres. The different production of a yolk–shell or core–shell structure from similar silica@MCP@M′CP is found to be governed by the thermal decomposition properties of the two CP layers within silica@MCP@M′CP. One-step decomposition of the two CP layers results in a core–shell metal oxide double layer, whereas two-step sequential decomposition of the two CP layers with a sufficient time interval between the first and second decompositions results in a yolk–shell metal oxide double layer. Moreover, the two-step sequential decomposition process during the formation of a yolk–shell turns out to occur in two different sequences, such as out-to-in and in-to-out, depending on the decomposition properties of the inner and outer CP layers. The space between the yolk and shell metal oxides is also modulated by altering the thickness of the inner MCP layer in silica@MCP@M′CP.

Graphical abstract: Rational manufacture of yolk–shell and core–shell metal oxide double layers from silica-templated coordination polymer double layers

Supplementary files

Article information

Article type
Research Article
Submitted
07 Qun 2021
Accepted
02 Cig 2021
First published
02 Cig 2021

Mater. Chem. Front., 2021,5, 3404-3412

Rational manufacture of yolk–shell and core–shell metal oxide double layers from silica-templated coordination polymer double layers

J. Yeo, G. Lee, S. Lee and M. Oh, Mater. Chem. Front., 2021, 5, 3404 DOI: 10.1039/D1QM00034A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements