| CeO2/ZnO复合光催化剂制备及其可见光催化性能 |
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| 引用本文： | 陈奕桦,胡俊俊,丁同悦,杨本宏,黄智锋.CeO2/ZnO复合光催化剂制备及其可见光催化性能[J].复合材料学报,2021,38(9):3008-3015. |
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| 作者姓名： | 陈奕桦 胡俊俊 丁同悦 杨本宏 黄智锋 |
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| 作者单位： | 1.合肥学院 生物食品与环境学院，合肥 230601 |
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| 基金项目： | 安徽省科技攻关后续项目(0392118031)；合肥学院研究生创新研究项目(CX201906) |
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| 摘 要： | 采用微波超声法，以ZnO为基体原位生长CeO2晶体，得到CeO2/ZnO复合光催化剂。利用XRD、SEM、TEM、PL、UV-Vis DRS等方法对制备的材料进行表征，并通过可见光降解AF对样品的光催化性能进行评价。结果表明，ZnO为纳米片互相穿插形成的花形球状结构，其表面附着有纳米CeO2颗粒，分散性较好。ZnO和CeO2的摩尔比为20∶1的CeO2/ZnO复合光催化剂在可见光下表现出良好的光催化活性，光照90 min后对AF的光降解率达到96.44%，较纯相ZnO和CeO2有显著提高。CeO2/ZnO的稳定性较好，6次使用后对AF的光降解率仍达到93.53%。机制研究发现，·O2?是光催化降解AF过程中的主要活性物种。
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| 关 键 词： | ZnO CeO2 复合光催化剂 光催化性能 酸性品红 |
| 收稿时间： | 2020-09-04 |
Preparation and visible light catalytic performance of CeO2/ZnO composite photocatalyst |
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| Affiliation: | 1.School of Biology Food and Environmental Engineering, Hefei University, Hefei 230601, China2.Center of Analysis and Testing, Hefei University, Hefei 230601, China |
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| Abstract: | CeO2/ZnO composite photocatalysts were prepared via in-situ precipitation of CeO2 nanoparticles on ZnO substrate by ultrasonic microwave method and were characterized by XRD, SEM, TEM, PL, UV-Vis DRS and other techniques. The photocatalytic properties of the samples were investigated by degrading acid fuchsin (AF). The results show that ZnO has flower-shaped spherical structure assembled by ZnO nanoflskes, and its surfaces are evenly attached with CeO2 nanoparticles. CeO2/ZnO composite photocatalyst showed good photocatalytic activity with visible light irradiation. When the molar ratio of ZnO and CeO2 was 20∶1, the photodegradation rate of AF reached 96.44% after 90 min of illumination, which was significantly higher than those of pure phase ZnO and CeO2. CeO2/ZnO indicated high stability, as the degradation rate retained 93.53% after repeated use of the same photocatalyst for 6 times. The photdegradation mechanism study shows that superoxide radical (·O2?) was the main active substance in photdegrading AF. |
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