| 摘要: |
| 采用共沉淀法，以Cd(NO3)2、二甲亚砜、Y2O3，HNO3，Fe(NO3)3和柠檬酸为原料合成一系列不同掺杂比例的CdS/YFeO3复合磁性光催化剂.用差热-热重、紫外可见漫反射、X射线衍射等技术对光催化剂进行了表征.X射线衍射结果表明CdS/YFeO3复合磁性光催化剂制备成功.由差热-热重结果可知，CdS/YFeO3复合磁性光催化剂的热稳定性高于纯CdS.紫外可见漫反射结果表明，CdS/YFeO3复合磁性光催化剂在紫外和可见光区的吸光度都比纯CdS大.通过罗丹明Ｂ的降解反应评价了该类光催化剂的活性.结果表明，CdS/YFeO3的比例对光催化活性有明显影响.光催化循环实验结果显示，CdS/YFeO3复合磁性光催化剂具有良好的回收性,首次回收率为92.08%. |
| 关键词: 硫化镉 铁酸钇 共沉淀法 复合磁性光催化剂 催化剂再生 |
| DOI： |
| 分类号:O643.36 |
| 基金项目:中国科学院大连化学物理研究所催化基础国家重点实验室开放课题基金（N-11-13） |
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| Preparation of novel magnetic CdS/YFeO3 composite photocatalysts and their photocatalytic performance |
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Xie Jun, Deng Qian, Cheng Yang, Tang Jianting
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School of Chemistry and Chemical Engineering, Key Laboratory of Theoretical Organic Chemistry and Functional Molecule for Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China
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| Abstract: |
| A series of CdS/YFeO3 composite magnetic photocatalysts were synthetized by co-precipitation method using cadmium nitrate, dimethyl sulfoxide, antimony trioxide, nitric acid, ferric nitrate and citric acid as raw materials. They were characterized by techniques of TG-DTA, UV-vis diffuse reflection, FL, XRD and UV-vis. The XRD results indicate that the CdS/YFeO3 composite magnetic photocatalysts are successfully prepared. The TG-DTA results indicate that the thermal stability of CdS/YFeO3 composite magnetic photocatalysts is higher than that of pure CdS. The UV-vis diffuse reflection results indicate that the absorbance of the composite magnetic photocatalysts is higher than that of pure CdS in ultraviolet-visible region. The photocatalytic activity of the photocatalysts is tested in degradation of rhodamine B visible light irradiation. The results show that the ratio of CdS/YFeO3 significantly affects the photocatalytic activity. The reusability results of photocatalytic experiments show that the CdS/YFeO3 composite photocatalysts can be easily recovered, and the recovery rate for the first cycle is 92.08%.
Keywords: CdS; YFeO3; Co-precipitation; Composite magnetic photocatalyst; catalyst regeneration |
| Key words: CdS YFeO3 Co-precipitation Composite magnetic photocatalyst catalyst regeneration |
