Study On Performance And Preparation Of Cadmium,antimony Magnetic Photocatalytic Materials

On the current social situation, the question of energy and environment is still the urgent issue so that people need to solve. The appear of photocatalytic technology will better solve the two problems on some extent. This thesis has studied from the following aspects, specific research as follows:1、Using cadmium nitrate, dimethyl sulfoxide, antimony trioxide, yttrium pxide, nitric acid, ferric nitrate and citric acid as raw materials, a series of CdS/YFeO3 composite magnetic photocatalysts have been synthetized by co-precipitation method. They are been characterized by TG-DTA, UV-vis diffuse reflection, FL XRD and UV-vis. The TG-DTA results show that thermal stability of CdS/YFeO3 composite magnetic photocatalyst is higher than CdS. The UV-vis diffuse reflection tests prove that the absorbance of composite magnetic photocatalysts is increase than of pure CdS. The FL and KRD show that the CdS/YFeO3 catalyst has been preparated successfully. The activity of the composite magnetic photocatalysts has been examined by catalytic degrading rhodamine B solution under visible light irradiation, which shows that the photocatalysts have good catalytic activity. The material proportion of CdS and YFeO3 significantly affects the photocatalytic activity of the photocatalysts. By the cycle and recovery experiment, the magnetic photocatalysts reveal a good repeatability and recovery, the recovery rate of catalysts is 92.08%.2、Using cadmium nitrate, ammonium fluoride, Antimony(III) oxide, sodium sulfide, ethylene glycol, yttrium oxide, nitric acid as raw materials, a series of Sb2S3/YFeO3 composite magnetic photocatalysts have been synthetized by co-precipitation method. They are been characterized by TG-DTA, UV-vis diffuse reflection, FL XRD and UV-vis. The UV-vis diffuse reflection tests prove that the absorbance of composite magnetic photocatalysts is increase than of pure Sb2S3. The FL and XRD show that the synthetic catalysts are Sb2S3/YFeO3 catalyst. The activity of the composite magnetic photocatalysts has been examined by catalytic degrading methyl orange solution under visible light irradiation, which shows that the photocatalysts have good catalytic activity. The material proportion of Sb2S3 and YFeO3significantly affects the photocatalytic activity of the photocatalysts. By the cycle and recovery experiment, the magnetic photocatalysts reveal a good repeatability and recovery, the recovery rate of catalysts is 85.37%. By doping the different content of NH4F to Sb2S3/YFeO3-0.05 photocatalytic materials, when the content of NH4F is 0.1g, the composite magnetic photocatalytic materials will have the highest activity.