A kind of preparation method of environmentally friendly hydrotalcite-like nanosheets

Abstract

An environmentally friendly method for preparing hydrotalcite-like nanosheets belongs to the technical field of two-dimensional nanomaterial preparation, which can solve the existing problems in the preparation of nanosheets using hydrotalcite-like precursors as complex processes and difficult recovery of organic solvents. Disperse the hydrotalcite-like and stabilizer in absolute ethanol; adjust the temperature and pressure to keep the ethanol in a supercritical state for a period of time; return to the normal temperature and pressure state to obtain the hydrotalcite-like nanosheets. The invention effectively peels off the hydrotalcites through the conversion of ethanol between supercritical and conventional states, and realizes the recycling of ethanol. The invention avoids the disadvantages of multiple ion exchanges and the use of organic solvents such as formamide in the conventional method, and has the characteristics of environmental friendliness, simple process and low cost.

Description

A kind of preparation method of environment-friendly hydrotalcite-like nanosheets technical field The invention belongs to the technical field of two-dimensional nanomaterial preparation, be specifically related to a class of hydrotalcite as precursor, prepare class Preparation method of hydrotalcite nanosheets. Background technique Due to their special planar structure, two-dimensional nanomaterials have been widely used in catalysis, batteries, sensors, etc. Follow and apply. Therefore, the development of facile, rapid, and environmentally friendly preparation methods for 2D nanomaterials has become a current concern. Research hotspots. Hydrotalcite-like has a layered structure, and the laminate exhibits cationic charge properties, and there are COs such as interlayers. 3 2- counter ion. laminate The strong electrostatic interaction between them makes it very difficult to fabricate nanosheets by exfoliation. During the usual preparation, First, multipl...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the existing problems in the process of preparing nanosheets using hydrotalcite-like precursors, such as complicated process and difficult recovery of organic solvents, and provides an environmentally friendly preparation method of hydrotalcite-like nanosheets

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