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Electrochemical Growth of Mg(OH)x Layered Films Stacked Parallel to the Substrates and Their Thermal Conversion to (111)-Oriented Nanoporous MgO Films
Author(s) -
Tsutomu Shinagawa,
Masaya Chigane,
Masanobu Izaki
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
ISSN - 2470-1343
DOI - 10.1021/acsomega.0c05619
Subject(s) - nanoporous , stacking , materials science , hydroxide , substrate (aquarium) , electrolysis , aqueous solution , magnesium , chemical engineering , electrochemistry , deposition (geology) , metal hydroxide , nanotechnology , chemistry , metallurgy , electrode , organic chemistry , electrolyte , geology , biology , engineering , paleontology , oceanography , sediment
Stacking layered metal hydroxide films parallel to a substrate is challenging. Here, we demonstrate a simple and rapid electrodeposition method for stacking magnesium hydroxide layered films. Room-temperature cathodic electrolysis (40 mA cm -2 ) in a Mg(NO 3 ) 2 aqueous solution induces the deposition of ⟨001⟩-oriented Mg(OH) x layered films stacked parallel to the substrate at the deposition rate of ∼2 μm min -1 . The obtained Mg(OH) x layered films undergo an overall oriented transformation by heat treatment to form ⟨111⟩-oriented nanoporous MgO films.

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