The present invention relates to a layered SiOx, a method for manufacturing the same, and a SiOx nanosheet peeled from the same, and more specifically, unlike a conventional bulk-type SiOx, has a two-dimensional crystal structure and is excellent in peelability, so that it is peeled in the form of a nanosheet It is easy to do, and relates to a layered SiOx having a large surface area and photocatalytic properties for hydrogen storage and hydrogen generation, a method for manufacturing the same, and a SiOx nanosheet having cation selectivity peeled therefrom.
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