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Facile hydrothermal preparation of titanium dioxide decorated reduced graphene oxide nanocomposite

Authors Chang BYS, Huang NM, Nor An’amt M, Marlinda AR, Norazriena Y, Muhamad MR, Harrison I, Lim HN, Hua Chia C

Received 12 November 2011

Accepted for publication 15 January 2012

Published 5 July 2012 Volume 2012:7 Pages 3379—3387


Review by Single anonymous peer review

Peer reviewer comments 4

Betty Yea Sze Chang,1 Nay Ming Huang,1 Mohd Nor An' amt,2 Abdul Rahman Marlinda,1 Yusoff Norazriena,1 Muhamad Rasat Muhamad,3 Ian Harrison,4 Hong Ngee Lim,5 Chin Hua Chia6

1Low Dimensional Materials Research Center, Physics Department, University of Malaya, Kuala Lumpur; 2Faculty of Agro Industry and Natural Resources (FASA), Universiti Malaysia Kelantan, Kota Bharu, Kelantan; 3The Chancellery Building, Multimedia University, Persiaran Multimedia, Cyberjaya, Selangor; 4School of Chemical and Environmental Engineering, The University of Nottingham Malaysia Campus, Semenyih, Selangor; 5Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia; 6School of Applied Physics, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia

Abstract: A simple single-stage approach, based on the hydrothermal technique, has been introduced to synthesize reduced graphene oxide/titanium dioxide nanocomposites. The titanium dioxide nanoparticles are formed at the same time as the graphene oxide is reduced to graphene. The triethanolamine used in the process has two roles. It acts as a reducing agent for the graphene oxide as well as a capping agent, allowing the formation of titanium dioxide nanoparticles with a narrow size distribution (~20 nm). Transmission electron micrographs show that the nanoparticles are uniformly distributed on the reduced graphene oxide nanosheet. Thermogravimetric analysis shows the nanocomposites have an enhanced thermal stability over the original components. The potential applications for this technology were demonstrated by the use of a reduced graphene oxide/titanium dioxide nanocomposite-modified glassy carbon electrode, which enhanced the electrochemical performance compared to a conventional glassy carbon electrode when interacting with mercury(II) ions in potassium chloride electrolyte.

Keywords: graphene oxide, titanium oxide, hydrothermal, nanocomposite

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