期刊
DALTON TRANSACTIONS
卷 50, 期 42, 页码 15170-15175出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt03150c
关键词
-
资金
- Ministry of Science and Technology of Taiwan [MOST 107-2113-M-007-013-MY3, 109-2634-F-007-023]
- Ministry of Education of Taiwan
By controlling the size of the nanoparticles, CeO2 nanocubes exhibit enhanced electrochemical activity and photocatalytic properties.
CeO2 nanocubes with average sizes of 9, 13, and 18 nm have been synthesized by preparing a slightly basic aqueous mixture of Ce(NO3)(3), Na2SO4, and NH4OH and heating the solution to 100 to 150 degrees C in 4 or 9 h. The nanocubes possess high crystalline quality. Their band gaps decrease gradually beyond the quantum confinement regime from 3.57 eV to 3.45 eV with increasing particle sizes. The 9 nm CeO2 nanocubes have the most positive valence band energy and correspondingly they exhibit the best electrochemical oxygen evolution reaction activity. Since band gaps of semiconductor nanocrystals can be tuned substantially through particle size control to yield different band energies, this fact can be utilized to enhance the electrochemical and photocatalytic properties.
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