Synthesis strategies toward improved ordering of [MnO6] octahedra in tunnel structured 2 × 3 and 2 × 4 MnO2

Ryan Andris; Phillip Ridley; Bryan W. Byles; David A. Cullen; Karren L. More; Ekaterina Pomerantseva

doi:10.1016/j.scriptamat.2020.113713

Synthesis strategies toward improved ordering of [MnO₆] octahedra in tunnel structured 2 × 3 and 2 × 4 MnO₂

Ryan Andris, Phillip Ridley, Bryan W. Byles, David A. Cullen, Karren L. More, Ekaterina Pomerantseva

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Improved homogeneity of tunnel size in Na-stabilized 2 × 3 and 2 × 4 MnO₂ structures was achieved by identifying and controlling critical synthesis parameters. 2 × 3 and 2 × 4 MnO₂ tunnel manganese oxide nanowires were obtained by hydrothermal treatment of Na-birnessite, a layered manganese oxide that undergoes a layer-to-tunnel transition under high pressure and temperature. Herein, the improved ordering of [MnO₆] octahedra is revealed via a combined analysis of X-ray diffraction patterns and scanning transmission electron microscopy images. We show that crystallinity of the Na-birnessite precursor and the chemical composition of the system during hydrothermal treatment are crucial for achieving the targeted size of the structural tunnels with adequate uniformity.

Original language	English
Article number	113713
Journal	Scripta Materialia
Volume	195
DOIs	https://doi.org/10.1016/j.scriptamat.2020.113713
State	Published - Apr 1 2021

Funding

E. Pomerantseva acknowledges funding from the National Science Foundation (Grants CMMI-1635233 and CBET-1604483 ). We thank Drexel's Materials Characterization Core (MCC) facilities for help with materials characterization. STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. E. Pomerantseva acknowledges funding from the National Science Foundation (Grants CMMI-1635233 and CBET-1604483). We thank Drexel's Materials Characterization Core (MCC) facilities for help with materials characterization. STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility.

Funders	Funder number
National Science Foundation	CMMI-1635233, CBET-1604483
Office of Science

Keywords

Control of the tunnel size
Manganese oxides
Nanowires
Synthesis parameters
Tunnel crystal structures

Access to Document

10.1016/j.scriptamat.2020.113713

Cite this

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title = "Synthesis strategies toward improved ordering of [MnO6] octahedra in tunnel structured 2 × 3 and 2 × 4 MnO2",

abstract = "Improved homogeneity of tunnel size in Na-stabilized 2 × 3 and 2 × 4 MnO2 structures was achieved by identifying and controlling critical synthesis parameters. 2 × 3 and 2 × 4 MnO2 tunnel manganese oxide nanowires were obtained by hydrothermal treatment of Na-birnessite, a layered manganese oxide that undergoes a layer-to-tunnel transition under high pressure and temperature. Herein, the improved ordering of [MnO6] octahedra is revealed via a combined analysis of X-ray diffraction patterns and scanning transmission electron microscopy images. We show that crystallinity of the Na-birnessite precursor and the chemical composition of the system during hydrothermal treatment are crucial for achieving the targeted size of the structural tunnels with adequate uniformity.",

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AU - Andris, Ryan

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AU - Cullen, David A.

AU - More, Karren L.

AU - Pomerantseva, Ekaterina

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AB - Improved homogeneity of tunnel size in Na-stabilized 2 × 3 and 2 × 4 MnO2 structures was achieved by identifying and controlling critical synthesis parameters. 2 × 3 and 2 × 4 MnO2 tunnel manganese oxide nanowires were obtained by hydrothermal treatment of Na-birnessite, a layered manganese oxide that undergoes a layer-to-tunnel transition under high pressure and temperature. Herein, the improved ordering of [MnO6] octahedra is revealed via a combined analysis of X-ray diffraction patterns and scanning transmission electron microscopy images. We show that crystallinity of the Na-birnessite precursor and the chemical composition of the system during hydrothermal treatment are crucial for achieving the targeted size of the structural tunnels with adequate uniformity.

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