Large-size two-dimensional amorphous metal oxide material and preparation method thereof

Abstract

The invention discloses a large-size two-dimensional amorphous metal oxide material based on conventional metal inorganic salt and a general preparation method of the large-size two-dimensional amorphous metal oxide material. According to the method, conventional metal inorganic salt is taken as a raw material, one or two of deionized water and ammonia gas (NH3) are taken as a forming auxiliary agent, and the growth process of the amorphous metal oxide is adjusted through a strong foaming effect generated by violent gas release caused by the forming auxiliary agent in calcination treatment, so that the amorphous metal oxide grows anisotropically; and finally preparing the large-size two-dimensional amorphous metal oxide. The method comprises the following specific steps: firstly, preparing a conventional metal inorganic salt raw material, then using one or two of deionized water and ammonia gas (NH3) as a large-size two-dimensional amorphous metal oxide forming auxiliary agent, selecting the forming auxiliary agent, putting the raw material into an alumina crucible, and putting the alumina crucible into a muffle furnace or a tubular furnace for low-temperature calcination, and finally, collecting the obtained powdery product, namely the large-size two-dimensional amorphous metal oxide. Compared with a traditional preparation method, the conventional metal inorganic salt involved in the method is low in price, easy to obtain, mild in reaction condition, free of high-temperature and high-pressure reaction, small in environmental pollution and suitable for industrial large-scale production. The transverse size of the prepared large-size amorphous metal oxide ranges from dozens of microns to hundreds of dimension meters, and the large-size amorphous metal oxide has the characteristics of thin layer and large size, and can be applied to the fields of energy storage, catalysis, mechanics, electronic industry (such as gate dielectric) and the like.

Description

technical field [0001] The patent of the present invention belongs to the technical field of synthesis of two-dimensional amorphous metal oxides, and specifically relates to different types of large-sized two-dimensional amorphous metal oxides and preparation methods of two-dimensional amorphous metal oxides, in particular to a metal inorganic salt-based Large-scale two-dimensional amorphous metal oxide materials and general preparation methods thereof. Background technique [0002] Plate-like amorphous metal oxides represent an important class of materials due to their special atomic arrangement with short-range order, long-range disorder, and a special two-dimensional planar structure (mainly characterized by smaller thickness and larger aspect-to-thickness ratio), making it suitable for a wide range of applications in energy storage, catalysis, mechanics, and electronics industries such as gate dielectrics. For example, semiconducting amorphous metal oxides such as indiu...

AI Technical Summary

Problems solved by technology

[0003] Although several currently established wet chemical methods have successfully prepared thin films and aggregated powders of metal oxides, for some salts of strong acids and weak bases (FeCl 3 , Zr(NO 3 ) 4 , Cr(NO 3 ) 3 , Al(NO 3 ) 3 etc.) are easily precipitated to form the corresponding metal oxide nanoparticles, and it is difficult to form the corresponding sheet-like amorphous metal oxide

Therefore, the size- and shape-controllable synthesis of amorphous metal oxides remains a great challenge due to the complex growth mechanism of amorphous nanomaterials.

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