Synthesis and characterization of highly organized crystalline rutile nanoparticles by low temperature dissolution-reprecipitation process

Journal Article

Lee, M. R. Karim, M. T. I. Bhuiyan, M. A. Dar, A. H. Seikh, M. Ali, M. B. Zaman, C. J. Lee, H. J. Kim and M. S. . 2015

• Publication Online URL: Synthesis and characterization of highly organized crystalline rutile nanoparticles by low temperature dissolution-reprecipitati
• Tags: nanostructures, chemical synthesis, dielectric properties, highly organized rutile TiO2
• Magazine \ Newspaper: Journal of Materials Research
• Volume Number: 30
• Pages: 1887-1893

Publication Abstract

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 × 10−6 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.