A preparation method and application of iron oxyhydroxide nanosheets for treating anionic dye sewage

Abstract

The invention discloses a preparation method and application of hydroxyl-ferric oxide nanosheets for treating anionic dye wastewater. The method includes the steps of adding a sodium borohydride solution into a specific iron salt aqueous solution, generating precursors through liquid phase controllable reduction, treating the obtained precursors by absolute ethyl alcohol, and drying and oxidizingthe precursors in the air to obtain the hydroxyl-ferric oxide nanosheets; the prepared hydroxyl-ferric oxide nanosheets have amorphous structures, the thickness of each sheet is 1-4 nm, each nanosheethas a larger specific surface area, the nanosheets have a stronger adsorption and photocatalytic degradation ability for azo-dye in wastewater, and accordingly, efficient decontamination of the wastewater can be achieved. Compared with the prior art, the preparation method has the advantages that the synthetic method is simple, the cost is low, and mass production is facilitated; surfactants do not need to be added into the synthesis system, the solvent is water, and environment protection, non-toxicity and harmlessness are realized; the physical and chemical structures and the characteristics of obtained samples are outstanding, and the nanosheets have a remarkable decontamination effect on the dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of novel nanometer functional materials. The invention relates to the preparation of a two-dimensional ultrathin amorphous iron oxyhydroxide nanosheet and an application method of using the nanosheet to decontaminate anionic dye wastewater. Background technique [0002] Since the discovery of graphene, ultra-thin two-dimensional nanomaterials have been widely used in high-precision sensors, electronics industry, separation and purification of mixtures, catalysis, and film coating due to their special physical and chemical properties, such as excellent mechanical and electrical properties. attention in the field. Although the potential application value of such materials is huge, their practical application process still faces two major obstacles: first, the preparation method is relatively complicated, the cost is high, and it is difficult to control the synthesis on a large s...

AI Technical Summary

Problems solved by technology

Although the potential application value of such materials is huge, their practical application process still faces two major obstacles: first, the preparation method is relatively complicated, the cost is high, and it is difficult to control the synthesis on a large scale. The physical and chemical exfoliation methods are difficult to control the yield; other two-dimensional nanomaterials such as transition metal dichalcogenides, layered double hydroxides, metal-organic frameworks, etc., need to be prepared with expensive template materials. Controlled growth synthesis, or the need for complex or even toxic synthetic components such as various surfactants and organic solvents for regulated synthesis, makes the research and development of these materials mostly limited to laboratory scale

Second, due to the complex or high requirements for the above-mentioned synthesis conditions, the types of materials that can be synthesized are also limited, especially for some cheap and widely used materials such as metal oxides, it is currently convenient to control and synthesize them into ultra-thin two-dimensional Nanostructured methods and systems are rarely reported

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