| 花状CeO2/TiO2异质结的构筑及光催化性能 |
| Constructing and Photocatalytic Performance of Flower-like CeO2/TiO2 Heterostructures |
|
| 摘要: 采用溶剂热法制备了三维花状CeO2/TiO2异质结光催化剂，然后以甲基橙（MO）为模拟有机污染物，在氙灯照射下考察了其光催化活性。结果表明，花状结构由纳米片和纳米颗粒复合而成，纳米片上均匀地附着CeO2颗粒。Ce/Ti的物质的量之比（nCe/nTi）和溶剂热时间影响异质结的光催化性能，当nCe/nTi=0.1、溶剂热时间为6 h时，CeO2/TiO2的光催化活性达到最佳，氙灯照射50 min的降解率达95%，光催化活性优于纯TiO2，这主要是CeO2和TiO2形成了异质结，有利于光生电子和空穴的分离。 |
| 关键词: 异质结 光催化 光降解 微纳结构 半导体 |
| 基金项目: 江苏省高等学校自然科学研究项目资助（No.19KJB430036）、江苏省高端结构材料重点实验室开放基金资助项目（No.hsm1907）、宿迁市科技计划项目（No.K202006）、宿迁学院新型复合材料研究创新团队（No.2021td01）和江苏省青蓝工程项目资助。 |
| Abstract: A kind of three-dimensional flower-like CeO2/TiO2 heterojunction as photocatalysts was designed by the solvothermal method. The photocatalytic activity was evaluated by the decomposition of methyl orange (MO) under xenon lamp irradiation. The results showed that the flower-like structure was composed of thin nanosheets, on which many CeO2 particles were uniformly attached. The molar ratio of Ce to Ti (nCe/nTi) and the solvothermal time influenced on the photocatalytic performance. When nCe/nTi=0.1 and the solvothermal time was 6 h, the photocatalytic activity of CeO2/TiO2 reached the best, and the degradation rate reached 95% under xenon lamp irradiation for 50 min. The results suggested that the photocatalytic activity of CeO2/TiO2 heterojunction was greatly improved, compared to TiO2, which was mainly the function of heterojunction formed by CeO2 and TiO2, and was conducive to the separation of photogenerated electrons and holes. |
| Keywords: heterostructure photocatalysis photodegradation micro/nano-materials semiconductor |
| 投稿时间：2021-03-30 修订日期：2021-10-29 |
| 摘要点击次数: 1658 |
| 全文下载次数: 448 |
| 王红侠,李新星,周禹.花状CeO2/TiO2异质结的构筑及光催化性能[J].无机化学学报,2022,38(1):127-136. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
