writer：Saisai Yuan, Qitao Zhang, Bin Xu, Sixiao Liu, Jinquan Wang, Ju Xie, Ming Zhang,Teruhisa Ohno
keywords：photocatalytic property
source：期刊
specific source：Catal. Sci. Technol.
Issue time：2017年

Photocatalysts that are responsive to visible light are necessary to

utilize solar. We prepared a reduced CeO2-x with absorption in the

visible region by a simple solvothermal method.  A new absorption peak

appeared around 500 nm (SPR), which is the origin of Ce3+. To elucidate

the relationship between the Ce3+ and activity, decomposition of

isopropyl alcohol (IPA) to generate acetone has been carried out under

visible light irradiation. CeO2-x showed superior activity than that of

pure CeO2. Ce3+ can induce oxygen vacancies in the lattice of CeO2-x,

resulting in improvement of activity. In addition, the introduction of

Ce3+ resulted in  improvement of absorption of CeO2-x in the visible

light region. Also, the appearance of small tentacles (Confeito-like) on

the surface of CeO2-x not only provided more active sites but also

prevented  aggregation. Owing to its visible light responsiveness and

its unique morphology, the performance of the material has been

significantly improved.