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https://www.ias.ac.in/article/fulltext/boms/041/04/0099

Polymeric citrate precursor method; nanocomposites; dielectric properties.

TiO$_{2(x)}$–CeO$_{2(1−x)}$ nanocomposites were prepared at low TiO$_2$ composition of 5, 10, 15 and 20%, by using TiO$_2$ and CeO$_2$ nanoparticles obtained by polymeric citrate precursor method. These nanocomposites were characterized by using powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive analysis of X-rays and BET surface area studies. BET studies showed the specific surface area of as-prepared nanocomposites in the range of 239–288 m$^2$ g$^{−1}$. Twenty percent of TiO$_2$-based titania–ceria nanocomposites have smallest average particle size of 30 nm and highest surface area of 288 m$_2$ g$^{−1}$ among all the as-prepared nanocomposites. The dielectric characteristics were measured as a function of frequency and temperature. The dielectric constant of TiO$_{2(x)}$–CeO$_{2(1−x)}$ at room temperature was 35.6 (maximum) at 500 kHz for $x = 0.20$.

TOKEER AHMAD¹ MOHD SHAHAZAD¹ MOHD UBAIDULLAH^{1 2} JAHANGEER AHMED²

1. Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
2. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia

Published

12 August 2018

Manuscript received

4 September 2017

Accepted

25 November 2017