This paper, completed by a researcher at Weifang University, discusses papers on the preparation process of SnO2 ultrafine particles by microwave hydrothermal method, which was published in the important journal .

The microwave hydrothermal method was applied to the hydrothermal preparation experiment of SnO2 nanocrystals, and the greening improvement of the synthesis method in the experimental teaching was realized. TEM showed that the product was a spherical-like particle with uniform size, about 25 nm. XRD showed the product to be pure tetragonal phase SnO2. The photodegradation dye RhB was used as the catalytic probe reaction under ultraviolet light. The effects of microwave reaction temperature, holding time and initial pH on the catalytic properties of the product were investigated. The results showed that the optimum conditions for the preparation of SnO2 under microwave hydrothermal reaction were : 110 ° C, 15 min, pH 4, UV degradation of RhB 45 minutes degradation rate of up to 99%.

Dissolve SnCl4·5H2O in 25ml of deionized water to form a 0.05mM clear solution, adjust the pH of the solution to 2-6, transfer to a 30ml microwave reactor, transfer to a microwave synthesizer, and set the reaction. The temperature is 90-130 ° C, the reaction holding time is 5-25 min, and the mixture is naturally cooled after the reaction is completed. The product is washed, filtered under reduced pressure, and dried to obtain a powder for subsequent testing.