Preparation method for nano stannic oxide by metallic tin oxidation

Abstract

The invention provides a preparation method for compounding nano stannic oxide by metallic tin oxidation. The method comprises the specific steps that the metallic tin is reacted with salpeter solution, and sizing agent containing stannic acid is obtained; the sizing agent containing the stannic acid experiences hydro-thermal treatment, and the obtained sizing agent is washed; finally, the obtained sizing agent experiences drying and calcining, and the nano stannic oxide is obtained. The preparation method for the nano stannic oxide by the metallic tin oxidation is simple in process, safe, andreliable, the use of material is less, the brought heteroion is less, the obtained product has high pureness, the dispersity is good, and the degree of crystallinity is high.

Description

technical field [0001] The application belongs to the field of nano powder materials, and in particular relates to a method for preparing nano tin dioxide by oxidation of metal tin. Background technique [0002] Tin dioxide (SnO 2 ) material is an important wide-bandgap N-type semiconductor material. Due to its unique physical and chemical properties, it is widely used in optoelectronic materials, electrode materials, catalysts, solar cells, gas sensors, liquid crystal displays, semiconductor components and conductive coatings. Broad uses and application prospects. Due to the small size effect, quantum size effect, surface and interface effect, nanomaterials show many specific properties in terms of performance compared with bulk materials. For example, the sensitivity of gas sensors varies with SnO 2 increases with the decrease of powder particle size, SnO 2 The catalytic performance of the catalyst also increases with the decrease of the particle size of the powder, an...

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Problems solved by technology

Due to the high gasification temperature (>2260°C), gasification heating requires high equipment and high energy consumption, making it difficult to achieve large-scale production

The liquid phase method is to prepare SnO 2 It is a relatively common method, but there are problems such as the particles are easy to agglomerate, the shape is not easy to control, there are many types of raw materials used, and the steps are complicated and require special treatment.

Using chlorine salt as raw material has the problem of difficulty in washing chlorine ions, and the residual chlorine ions in the powder will corrode the device and hinder the densification of the target; there is a serious waste of organic matter in the sol-gel method or the reverse micelle method. , high cost and serious agglomeration; the mechanical method has defects such as low powder purity and wide particle size distribution; the microemulsion method can confine the processes of nucleation, growth, coalescence, and agglomeration to a tiny spherical droplet However, the synthesis process consumes a large amount of organic solvents. Most of these organic solvents are expensive, highly toxic, easy to pollute the environment, and have carbon residues, which affect the performance and performance of the product. Purity; some other methods also use organic reagents, need a large amount of lye to neutralize and other problems

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