Table of Contents Author Guidelines Submit a Manuscript
International Journal of Photoenergy
Volume 2014 (2014), Article ID 650583, 9 pages
http://dx.doi.org/10.1155/2014/650583
Research Article

Improved Synthesis of Reduced Graphene Oxide-Titanium Dioxide Composite with Highly Exposed 001 Facets and Its Photoelectrochemical Response

1Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
2Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 UPM, Serdang, Selangor (Darul Ehsan), Malaysia
3Department of Physics, Masjed-Soleiman Branch, Islamic Azad University (I.A.U.), Masjed-Soleiman 64914, Iran
4Department of Physics, Ahwaz Branch, Islamic Azad University, Ahwaz 63461, Iran

Received 12 December 2013; Revised 19 March 2014; Accepted 26 March 2014; Published 14 April 2014

Academic Editor: Wonyong Choi

Copyright © 2014 Gregory S. H. Thien et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Crystal facet engineering has attracted worldwide attention, particularly in facet manipulation of titanium dioxide (TiO2) surface properties. An improved synthesis by solvothermal route has been employed for the formation of TiO2 with highly exposed facets decorated on reduced graphene oxide (RGO) sheets. The RGO-TiO2 composite could be produced with high yield by following a stringently methodical yet simple approach. Field emission scanning electron microscope and high resolution transmission electron microscope imaging reveal that the structure consists of TiO2 nanoparticles covered with TiO2 nanosheets of exposed facets on a RGO sheet. The photocurrent response of the RGO-TiO2 composite was discovered to outperform that of pure TiO2, as a ~10-fold increase in photocurrent density was observed for the RGO-TiO2 electrodes. This may be attributed to rapid electron transport and the delayed recombination of electron-hole pairs due to improved ionic interaction between titanium and carbon.