Development of visible light response of CeO2-x with the high content of Ce3+ and its photocatalytic property
作者：Saisai Yuan, Qitao Zhang, Bin Xu, Sixiao Liu, Jinquan Wang, Ju Xie, Ming Zhang,Teruhisa Ohno
關鍵字：photocatalytic property
論文來源：期刊
具體來源：Catal. Sci. Technol.
發(fā)表時間：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.