Butterfly-shaped SnO2 two-dimensional nanometer material, and preparation method and application thereof

Abstract

The invention discloses a butterfly-shaped SnO2 two-dimensional nanometer material, and a preparation method and an application thereof. The butterfly-shaped SnO2 two-dimensional nanometer material isprepared by using SnSO4 and SDBS as raw materials through a two-step combined method of a hydrothermal reaction and high-temperature oxidizing annealing. The butterfly-shaped SnO2 two-dimensional nanometer material has a two-dimensional butterfly shape and a structure rich in surface defects, and has the characteristics of gas adsorption, surface activity, oxidation reduction and gas sensitivity.The preparation method comprises the following steps: preparation of a precursor solution, a main reaction, separation of a precursor, and preparation of a nanometer material through high-temperatureoxidizing heat treatment. The application comprises the application of the butterfly-shaped SnO2 two-dimensional nanometer material in preparation of gas sensors. Directed at the problems of complicated preparation procedures, high cost, incapability of realizing large-scale preparation and addition of environmentally-unfriendly, toxic and harmful organic solvents like strong acid and strong alkali in conventional preparation of the two-dimensional SnO2 nanometer material, the invention provides a simple, economical, green and easily-scaled synthetic method.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a butterfly-shaped SnO 2 Two-dimensional nano material and its preparation method and application. Background technique [0002] Since 2004, Novoselov K S and Geim A K successfully used adhesive tape to peel graphene flakes from highly oriented pyrolytic graphite, the preparation and application of various two-dimensional inorganic nanomaterials have entered a period of rapid development. Due to the reduction of material dimensions and structural feature size, two-dimensional nanomaterials such as nanosheets and nanofilms have significant surface effects and interface effects, small size effects, macroscopic quantum tunneling effects, and dielectric confinement effects, etc. It presents novel and unique physical, electronic, chemical and optical properties different from traditional materials, so it has broad application prospects in optoelectronic devices, sensors, micro...

AI Technical Summary

Problems solved by technology

In hydrothermal synthesis, strong acids or strong bases, such as sodium hydroxide, potassium hydroxide and hydrochloric acid, are mostly the basic conditions of the method, and most of them need toxic and harmful organic solvents that are not very good for the environment; more important Interestingly, the two-dimensional SnO prepared by hydrothermal 2 The limited surface activity, surface adsorption, gas sensitivity, and redox characteristics of nanosheets and nanofilms hinder the development of SnO 2 Applications of 2D Nanomaterials

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