Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO2−x nanostructures

Sajjad S. Mofarah; Esmaeil Adabifiroozjaei; Yuan Wang; Hamidreza Arandiyan; Raheleh Pardehkhorram; Yin Yao; M. Hussein N. Assadi; Rashid Mehmood; Wen-Fan Chen; Constantine Tsounis; Jason Scott; Sean Lim; Richard Webster; Vicki Zhong; Yuwen Xu; Pramod Koshy; Charles C. Sorrell

doi:10.1039/C9TA11961B

Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO_2−x nanostructures†

Sajjad S. Mofarah,

*^a Esmaeil Adabifiroozjaei,

^b Yuan Wang,

^c Hamidreza Arandiyan,

^d Raheleh Pardehkhorram,

^c Yin Yao,

^e M. Hussein N. Assadi,

^af Rashid Mehmood,

^ag Wen-Fan Chen,

^ah Constantine Tsounis,ⁱ Jason Scott,

ⁱ Sean Lim,

^e Richard Webster,

^e Vicki Zhong,^a Yuwen Xu,

^a Pramod Koshy

^a and Charles C. Sorrell

^a

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
E-mail: s.seifimofarah@unsw.edu.au

^b Research Center for Functional Materials (RCFM), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan

^c School of Chemistry, UNSW Sydney, Sydney, NSW 2052, Australia

^d Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Sydney 2006, Australia

^e Electron Microscopy Unit (EMU), Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW 2052, Australia

^f Center for Green Research on Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^g Department of Physics and Astronomy, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University, Sydney, NSW 2109, Australia

^h Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan

ⁱ Particles and Catalysis Research Group, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia

Abstract

Precise control over the morphology of nanomaterials is critical yet challenging. The present work reports an efficient approach to tailor the architecture of nanostructures. The process involves rapid disassembly/reassembly of an unstable metal-based coordination polymer (MCP) by controlling the kinetics of the reassembly process. The synthesis procedure delivers unprecedented polycrystalline nanostructures, e.g., holey 2D CeO_2−x nanosheets, with precisely tailored thicknesses in the range of 10–100 nm, and hollow 3D pseudo-octahedra and spheres. The consequent high surface areas and pore volumes, short diffusion distances, and high defect densities of the holey 2D CeO_2−x indicate significant densities of active sites. This holey architecture exhibits rapid CO conversion and outstanding solar light photocatalytic performance. This approach of directed assembly offers a template-free, controllable, and cost-effective approach to achieve engineered CeO_2−x architectures, which are nearly impossible through existing approaches.

Journal of Materials Chemistry A

Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO_2−x nanostructures†

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Journal of Materials Chemistry A

Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO2−x nanostructures†

Abstract

Supplementary files

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Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO2−x nanostructures

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Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO_2−x nanostructures†

Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO_2−x nanostructures