Low-Temperature Direct Synthesis of CeO2–ZrO2 Solid Solution Nanoparticles by a Hydrothermal Method
Authors: Ahniyaz, Anwar; Fujiwara, Takeshi; Fujino, Takahiro; Yoshimura, Masahiro
Source: Journal of Nanoscience and Nanotechnology, Volume 4, Number 3, March 2004 , pp. 233-238(6)
Publisher: American Scientific Publishers
Abstract:Well-crystallized CeO2-ZrO2 solid solution nanoparticles were successfully prepared by a hydrothermal method in a single step at 120 °C, for 6 h without any post heat treatment. The particle sizes of 6 ± 3 nm by surface area measurements are in good agreement with crystallite sizes of 6 ± 3 nm by X-ray diffraction. Transmission microscopy also confirmed the formation of crystals of 5-8 nm in the products. In the formation of the homogeneous solid solutions the complete oxidation of Ce3+ to Ce4+ in the precipitated gels seems to be one of the important steps. The solid solutions contained several wt % water, but it was expelled by calcining ≥600 °C. The heating of the samples brought about grain growths, but did not change the phases. The specific areas of 120-200 m2/g of as-prepared samples were decreased to 4-14 m2/g by heating at 900 °C for 4 h.
Document Type: Research Article
Publication date: March 2004
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- ingentaconnect is not responsible for the content or availability of external websites