Prof. R.M.G. Rajapakse

Prof. R.M.G. Rajapakse |Clyto Access

University of Peradeniya, Sri Lanka

Keynote Speaker

Expertise: Nanoscience and Nanotechnology

Biography:

Prof. R.M.G. Rajapakse has completed his Ph.D. at the age of 28 years from Imperial College of Science, Technology and Medicine, University of London and Postdoctoral studies from Imperial College, University of Bath, UMIST, University of Central Lancashire and University of Liverpool, UK. He was a DAAD Fellow at Max Planck Insttute for Polymer Research, Mainze, Germany, a Visiting Research Professor to the University of Texas at Arlington, USA, and a Visiting Professor to the Research Institute of Electronics, Shizuoka University, Japan. He is a Senior Professor of University of Peradeniya, Sri Lanka, and a Consultant to three major Industries. He has published more than 200 papers and communictions and has been serving as an editorial board member of various International Journals.He is a recepient of 15 National Awards.

Presentation:

Title: Research into Greener Transportation

Abstract:

This review paper summarizes the problems associated with transportation as regard to automobile emissions caused by fossil fuel combustion and ways of circumventing such problems. Hydrogen is perhaps the cleanest fuel though hydrogen in its molecular form is hardly available naturally. As such, current methods of hydrogen production and their problems will be revealed. Hydrogen production through water photo-splitting will be thoroughly reviewed. Our work on the use of silver and niobium(v)-doped TiO2and Cu-doped TiO2 nanowires in water photo-splitting is then described. Silver nanoparticles deposited on TiO2 nanowires are capable of absorbing in the visible range due to surface plasmon resonance effect while Nb(V) introduces electronic energy levels within the band gap of titanium dioxide comparable to vibrational energy levels of titanium dioxide thus enabling absorption of infrared radiation and upconversion. This catalyst is perhaps the fasted water splitting catalyst designed and developed so far and is working even in the diffuse room light conditions and even in the dark through upconverted infrared radiation. We then review fuel cell powered motor vehicles where we first give a brief introduction to fuel cells. In a fuel cell, a fuel is oxidized by an oxidant and the latter is usually atmospheric oxygen. Both the fuel and air are supplied continuously for consistent performance. Oxygen reduction half-reaction is a difficult one involving over 500 mV overpotential on many electrode surfaces. As such, electrocatalysts based on precious metals such as Pt-Rh are used that adds an enormous cost for fuel cell power. As such, ways of minimizing platinum content and the use of cheap non-platinum catalysts will be described. The performance of large number of novel,low-cost, clay-based catalysts which we developed will be reviewed by taking some examples.

Related Conferences :

2nd world summit on Nanotechnology and Nanomedicine Research