期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 150, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2020.109891
关键词
CeO2/MgAl2O4; Functional group; Two-step synthesis method; Photoluminescence properties; Photocatalytic activity
资金
- Chongqing Natural Science Foundation [cstc2019jcyj-msxmX0310]
- NPL [2019DB02]
- CAEP [2019DB02]
- Talent Introduction Project [09924601]
- NSAF Joint Foundation of China [U2030116]
- Major Cultivation Projects [18ZDPY01]
- Research Project of Higher Education Teaching Reform of Chongqing Three Gorges University [JGZC1903]
- Science and Technology Research Program of Chongqing Education Commission of China [KJZD-K202001202, KJQN201901]
CeO2/MgAl2O4 composite materials with an n-n heterojunction were synthesized by one-step and two-step methods, and the properties were compared. The one-step synthesis showed good photoluminescence properties, while the two-step synthesis exhibited high photocatalytic activity for dye degradation. The synergistic effects of phase purity, specific surface area, light absorption capacity, and charge transfer efficiency contributed to the enhanced photocatalytic performance.
CeO2/MgAl2O4 (molar ratio 9:1) composite materials (CMAOCMs) with an n-n heterojunction were synthesized by one-step synthesis and two-step synthesis methods, and their phase purity, surface morphology, optical properties, photoluminescence properties, functional groups, and photocatalytic activity were compared. No matter which method is used to synthesize the CMAOCMs, the host lattice is CeO2 with a cubic phase. The mean particle size of the CMAOCMs prepared by the one-step synthesis and two-step synthesis methods is 90 and 50 nm, respectively. The CMAOCM prepared by the one-step synthesis method exhibits good photoluminescence properties because of the high recombination rate of electron-hole pairs. A dye concentration of 5 mg/L, a catalyst content of 1 g/L, and pH 13 were selected for photocatalytic degradation of the dye methylene blue by the CMAOCM photocatalyst. The CMAOCM prepared by the two-step synthesis method exhibits high photocatalytic activity for the degradation of methylene blue because of the synergistic effects of phase purity, specific surface area, light absorption capacity, and charge transfer and separation efficiency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据