title: Synthesis of CeO2 nanorods via ultrasonication assisted by polyethylene glycol.
abstract: Polycrystalline CeO2 nanorods 5-10 nm in diameter and 50-150 nm in length were synthesized via ultrasonication using polyethylene glycol (PEG) as a structure-directing agent at room temperature. The properties of the CeO2 nanorods were characterized by TEM, EDS, XRD, XPS, FT-IR, TG, BET, and UV-vis spectroscopy. Various reaction parameters, such as the content of PEG, the molecular weight of PEG, the concentration of KOH, the pH value, and the sonication time, were investigated by a series of control experiments. The content of PEG, the molecular weight of PEG, and the sonication time were confirmed to be the crucial factors determining the formation of one-dimensional CeO2 nanorods. A possible ultrasonic formation mechanism has been suggested to explain the formation of CeO2 nanorods.
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, China. dengsongzh@ 163.com
authors.forename: Dengsong
authors.initials: D
authors.lastname: Zhang
authors.forename: Hongxia
authors.initials: H
authors.lastname: Fu
authors.forename: Liyi
authors.initials: L
authors.lastname: Shi
authors.forename: Chengsi
authors.initials: C
authors.lastname: Pan
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Chu
authors.forename: Weijun
authors.initials: W
authors.lastname: Yu