Study On Preparation And Photocalytic Degradation Of Metal Oxide/Cation Exchange Resin

Because of the strong absorption performance of composite materials, the preparation of metal oxides and cation exchange resin compounds were studied using ion exchange reaction in the reation kettle. And the same method was used to prepare three composite materials (ZnO/cationic exchange resin, SnO/cationic exchange resin, and TiO2/cation exchange resin). They all had good photocatalytic degradation performance for dyes(methylene blue, methyl violet, methyl orange).(1) The preparation of ZnO/cation exchange resin and its photocatalytic degradation of dye were investigated, whose results showed that: when oxidation time was 3h, pH value was 10 and the reaction temperature was 80℃, the new composites of ZnO/cation exchange resin were successfully prepared and the metal content of zinc ions were the highest. The content of compounds was measured by EDTA volumetric method. The ZnO was 0.278g/g cation exchange resin, which was the highest content of compounds.The composites were investigated by XRD、SEM、FT-IR and DRS, whose data showed that the reaction time can affect the morphology of product. When reaction time was 3h, the preparation of ZnO was neat, mostly needle shape, and the photocatalytic degradation effect was the best. The composites obtain photocatalytic activity in the oxidation of methylene blue, methyl violet, methyl orange by the degradation rate was 65.34%,93.36%,33.32% respectively.It could seen that the degradation of methylene blue by ZnO/cation exchange resin catalyst was the best.(2) The SnO/cationic exchange resin was prepared, the complexes were characterized and their photocatalytic degradation activity of dyes was studied. The results showed that when the reaction time was 3h, pH value was 9, and the reaction temperature was 100℃, the metal content of tin ion of the SnO/cationic exchange resin was the highest and the maximum content of SnO reached 0.201 g/g cation exchange resin.The XRD, SEM, FT-IR of the composites had been characterized, which could find that the product had been successfully prepared, but the shape of the particles were different. Especially when the reaction temperature was set at 100℃ or 120℃,the photocatalytic degradation activity of the composites also had great differences. It could see that the product obtained had photocatalytic degradation activity for methylene blue, methyl violet, methyl orange, whose degradation rate was 78.82%、 88.67%、15.3%.(3) Preparation, characterization and photocatalytic degradation of TiO2/cationic exchange resin was investigated, which can be found that the composites would be affected by the reaction time and the temperature. The TiO2/cationic exchange resin were successfully prepared when the reaction time was 3h, at the temperature was 80℃ and pH value was 9. The composites had the TiO2 of 0.171g/g cation exchange resin and obtained higher metal content.The TiO2/cationic exchange resin were characterized by XRD、SEM and FT-IR, from which more obvious and regular structure could be found. The results showed that the structure of the compound and its surface area were closely related to the complex of the specific surface area. The product had photocatalytic degradation activity of methylene blue, methyl violet, methyl orange by the degradation rate of 100%、 100%、45%, which can conclude that TiO2/cation exchange resin had the best photocatalytic degradation performance in three kinds of composites.