Jump to main content
Jump to site search

Issue 3, 2019
Previous Article Next Article

A facile low-temperature synthesis of hierarchical porous Co3O4 micro/nano structures derived from ZIF-67 assisted by ammonium perchlorate

Author affiliations

Abstract

The thermolysis of metal–organic frameworks (MOFs) opens a new window for the fabrication of oxide semiconductors due to its simplicity, low cost and large-area uniformity of the resulting material. However, this approach usually requires high annealing temperatures over 350 °C. In this work, sub-micro hierarchical porous Co3O4 dodecahedra were synthesized by the thermolysis of zeolitic imidazolate frameworks 67 (ZIF-67) at a low temperature of 268 °C assisted by ammonium perchlorate (AP), in which ZIF-67 was employed as a metal source and a sacrificial template. The formation mechanism was probably attributable to the generation of Co–O bonds between the Co atom of ZIF-67 and the O atom of AP at lower temperatures which can accelerate the weakening of Co–N bonds of ZIF-67 and thus lead to an abrupt decomposition of ZIF-67 at 268 °C. More importantly, the generation of the Co–O bond and the weakening of the Co–N bond were identified using the FTIR, Raman and XPS results. As confirmed by DFT results, ZIF-67 can be decomposed into Co3O4 at lower temperatures assisted by AP than that in air. In addition, the obtained sub-micro hierarchical porous Co3O4 dodecahedra showed a very large specific surface area of 106.11 m2 g−1, much larger than that in previous reports. Therefore, this work can provide a novel atomic insight into the formation mechanism of Co3O4 hierarchical porous structures derived from ZIF-67 with AP at lower temperatures and also an energy-efficient method to synthesize porous metal oxide structures.

Graphical abstract: A facile low-temperature synthesis of hierarchical porous Co3O4 micro/nano structures derived from ZIF-67 assisted by ammonium perchlorate

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Nov 2018, accepted on 22 Jan 2019 and first published on 24 Jan 2019


Article type: Research Article
DOI: 10.1039/C8QI01279B
Citation: Inorg. Chem. Front., 2019,6, 715-722

  •   Request permissions

    A facile low-temperature synthesis of hierarchical porous Co3O4 micro/nano structures derived from ZIF-67 assisted by ammonium perchlorate

    K. Zhao, H. Li, S. Tian, W. Yang, X. Wang, A. Pang, C. Xie and D. Zeng, Inorg. Chem. Front., 2019, 6, 715
    DOI: 10.1039/C8QI01279B

Search articles by author

Spotlight

Advertisements