Open Access Nano Express

Microwave-Assisted Synthesis of Titania Nanocubes, Nanospheres and Nanorods for Photocatalytic Dye Degradation

T Suprabha, Haizel G Roy, Jesty Thomas, K Praveen Kumar and Suresh Mathew*

Author Affiliations

School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686 560, Kerala, India

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Nanoscale Research Letters 2008, 4:144-152  doi:10.1007/s11671-008-9214-5

Published: 26 November 2008

Abstract

TiO2nanostructures with fascinating morphologies like cubes, spheres, and rods were synthesized by a simple microwave irradiation technique. Tuning of different morphologies was achieved by changing the pH and the nature of the medium or the precipitating agent. As-synthesized titania nanostructures were characterized by X-ray diffraction (XRD), UV–visible spectroscopy, infrared spectroscopy (IR), BET surface area, photoluminescence (PL), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and atomic force microscopy (AFM) techniques. Photocatalytic dye degradation studies were conducted using methylene blue under ultraviolet light irradiation. Dye degradation ability for nanocubes was found to be superior to the spheres and the rods and can be attributed to the observed high surface area of nanocubes. As-synthesized titania nanostructures have shown higher photocatalytic activity than the commercial photocatalyst Degussa P25 TiO2.

Keywords:
Nanocubes; Nanorods; Nanospheres; Photocatalytic activity; Microwave irradiation; Dye degradation