Synthesis and characterization of highly organized crystalline rutile nanoparticles by low-temperature dissolution-repre
- PDF / 521,276 Bytes
- 7 Pages / 584.957 x 782.986 pts Page_size
- 74 Downloads / 154 Views
Mohammad Tauhidul Islam Bhuiyan Faculty of Engineering, Particle Technology Research Centre, University of Western Ontario, London, Ontario N6A5B8, Canada
Mushtaq Ahmad Dar, Asiful Hossain Seikh, and Muhammad Ali Shar Center of Excellence for Research in Engineering Materials, Advanced Manufacturing Institutes, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
Mohammed Badruz Zaman AB-Biotech Inc., National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada; and Center of Excellence for Research in Engineering Materials, Advanced Manufacturing Institutes, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
Chul Jae Lee School of Chemical Industry, Yeungnam College of Science and Technology, 170 Hyeonchung-ro, Nam-gu, Daegu 705-703, Republic of Korea
Hee Jin Kim Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 790-784, Republic of Korea
Mu Sang Lee Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea (Received 17 November 2014; accepted 1 May 2015)
Rutile nanoparticles have been synthesized by acid hydrolysis of titanium isopropoxide by low-temperature dissolution-reprecipitation process. High-resolution transmission electron micrographs of the rutile colloidal solution show needle-shaped rutile nanoparticles with the dimensions of 10–30 nm in diameter and 100–150 nm in length. X-ray diffraction (XRD) data show the existence of only the rutile polymorph in TiO2 powder with a crystallite size of 11.3 nm. The dielectric constant of rutile nanoparticles has been found to be 57 at 10 MHz AC frequency and DC conductance as 2.3 106 S/cm. Transmission electron micrographs and XRD data analysis imply that the rutile crystallites are self-organized in a regular fashion to produce multilayer three-dimensional linear clusters. The clusters have been found to be microporous (average porosity 1.4 nm) with high specific surface area (132.2 m2/g). At higher concentration, the clusters aggregate to produce interconnected network of star- or flower-like structures. This organized crystalline microporous metal-oxide semiconductor might find various practical applications.
I. INTRODUCTION
Rutile has been found to be potential material for photocatalytic antibacterial activity, 1 gas sensors, 2,3 batteries, 4,5 solar cells, 6,7 capacitors,8,9 high-k gate insulator,10 and so on due to low cost production, thermal stability, and most importantly for its semiconductive,
Contributing Editor: Edson Roberto Leite a) Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/jmr.2015.150 J. Mater. Res., Vol. 30, No. 12, Jun 28, 2015
dielectric behavior. Potential photoluminescence11,12 and chemiluminescence13,14 properties of rutile provide the additional advantage toward its diversified applications. Rutile is the most stable one among the TiO2 polymorphs and also the most abundant one. Rutile nanoparticle finds more attractive applications for controlled morphology and high specific surface
Data Loading...
