Paper Title:
Fourier Electron Density Maps for Nanostructured TiO2 and TiO2-CeO2 Sol-Gel Solid
  Abstract

Sol-gel TiO2 and TiO2–CeO2 materials were synthesized at pH3 using HNO3 as hydrolysis catalysts. Gels were annealed at 473, 673 and 873 K for 4h. X-ray diffraction Rietveld refinement was used to determine the mean crystallite size, TiO2 stoichiometry (titanium deficiency) and Fourier electronic density maps. It has been found that the fractal surface dimension diminishes on TiO2 a nd TiO2–CeO2 surfaces as the annealing temperature increases. The X-ray diffraction patterns showed nanocrystalline anatase phase in the range of 8.9 to 43.6 nm in depending of the annealing temperature. A dependency between the crystallite size and the titanium deficiency [V+Ti4+] per unit cell was found, as lowest is the crystallite highest is the titanium deficiency. Strong differences on the Fourier electron density map were found on TiO2 and TiO2–CeO2 materials. It was concluded that the sol-gel preparation method favors the formation of nanosized TiO2 with high Ti4+ stoichiometry deficiency.

  Info
Periodical
Edited by
Guest Editor: Umapada Pal
Pages
87-94
DOI
10.4028/www.scientific.net/JNanoR.5.87
Citation
F. Galindo-Hernández, R. Gómez, "Fourier Electron Density Maps for Nanostructured TiO2 and TiO2-CeO2 Sol-Gel Solid", Journal of Nano Research, Vol. 5, pp. 87-94, 2009
Online since
February 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Kwee Yong Tan, Tan Kim Lee, Lim Kean Pah, Shaari Abdul Halim, Tan Kar Ban, Chen Soo Kien
Abstract:SiC added MgB2 polycrystalline samples were synthesized at low (650°C) and high (850°C) temperatures in order to study the sintering effect...
78
Authors: Weerachai Sangchay, Lek Sikong, Kalayanee Kooptarnond, Xin Wei
Abstract:TiO2-AgCl/Cu2+ thin films containing 0 to 1%Cu2+ coated on glass slides were prepared by sol gel-dip coating method. The prepared films were...
149
Authors: Xiao Li Zhang, Wei Ping Tang, Hai Yan Wu, Bing Bing Zhang, Xiu Cheng Zheng
Chapter 12: Nanotechnology
Abstract:Bismuth sodium titanate (Bi0.5Na0.5TiO3 , abbreviated as BNT) nanoparticles were synthesized by hydrothermal...
2573
Authors: Sirirat T. Rattanachan, P. Krongarrom, Thipwan Fangsuwannarak
Abstract:In this study, undoped and B-doped ZnO thin films were successfully deposited on the glass substrates by a sol-gel spin coating method. The...
145
Authors: Soheila Rahavi, Ahmad Monshi, Rahmatollah Emadi, Ali Doostmohammadi, Hamed Akbarian
Abstract:The study reported here focuses on the crystallite size of synthetic hydroxyapatite (HAp) obtained using sol-gel method and natural HAp...
28