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Prashant
V. Kamat
Karnatak University, India, B.S.
('72)
Bombay University, India, M.S.
('74) Ph.D.
('79)
Tel. (574) 631-5411
e-mail: Kamat.1@nd.edu
Charge Transfer Processes and Energy Conversion |
Scientific Interests
Elucidation of the mechanistic and kineticdetails of charge transfer
processes inheterogeneous assemblies with an objective to improve
energy conversion efficiencies.
Nanoparticles and Advanced Materials - Metal
and semiconductor nanostructures, Molecular Clusters & Carbon
Nanotubes - Synthesis, characterization, and surface functionalization,
Optical properties, Photoelectrochemistry; and Sensor applications.
Light Energy Conversion
- Design of inorganic-organic nanoassemblies for light energy conversion,
Organic photovoltaics.
Fuel cell and Hydrogen production
- Carbon nanostructures (Carbon nanotubes and fullerenes) and metal
nanoparticles for the development of fuel cell electrodes and semiconductor
metal composites for photocatalytic hydrogen production.
Chemical Processes in Heterogeneous Media -
Surface photochemical processes, molecular clusters, ultrafast photophysical
and photochemical events in oxides and polymers, mechanism and kinetics
of photoeffects at semiconductor/electrolyte interface.
Environmental Science -
Advanced oxidation processes for treating organic wastes from water
- use of metal oxide semiconductors such as TiO2,
SnO2 and ZnO to sense and degrade haloaromatics
and azo dyes. Simultaneous sensing and destruction of low level toxic
organics.
Recent Accomplishments | Top |
Single wall carbon nanotubes are emploed as support architectures to anchor semiconductor nanoparticles such as ZnO, TiO2 and CdS. Upon excitation with UV light, the semiconductor particles undergo charge separation and inject electrons with a rate constant of ~108 s–1. Near doubling in the photoconversion efficiency was achieved by depositing TiO2 particles on SWCNT films.
Electron injection from excited CdSe quantum dots into TiO2 nanoparticles was modulated by controlling the particle size. An increase in the interparticle electron transfer rate constant by three orders of magnitude (from ~107 to 1010 s-1) has been achieved by decreasing the CdSe particle diameter from 7.5 nm to 2.4 nm. By using tubular TiO2 support architecture, photon converson efficeiencies greater than 45% has been achieved for CdSe based quantum dot solar cells.
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Selected Publications | Top |
Radich, J.G., Dwyer, R. and Kamat, P.V.
Cu2S Reduced Graphene Oxide Composite for High Efficiency Quantum Dot Solar Cells . Overcoming the Redox Limitations of S2-/Sn2- at the Counter Electrode
J. Phys. Chem. Lett. 2011 2, 2453-2460 link
Meekins, B.H. and Kamat, P.V.
Role of Water Oxidation Catalyst, IrO2 in Shuttling Photogenerated Holes Across TiO2 Interface
J. Phys. Chem. Lett. 2011 2, 2304-2310 link
Takai, A. and Kamat, P.V.
Capture, Store and Discharge. Shuttling Photogenerated Electrons across TiO2-Silver Interface
ACS Nano 2011 5, 7369-7376 link
Murphy, S., Huang, L. and Kamat, P.V.
Charge-Transfer Complexation and Excited State Interactions in Porphyrin-Silver Nanoparticle Hybrid Nanostructures
J. Phys. Chem. C 2011 115, ASAP link
Hayashi, H., Lightcap, I.V., Tsujimoto, M., Takano, M., Umeyama, T., Kamat, P. V. and Imahori, H.
Electron Transfer Cascade by Organic/Inorganic Ternary Composites of Porphyrin, Zinc Oxide Nanoparticles, and Reduced Graphene Oxide on a Tin Oxide Electrode that Exhibits Efficient Photocurrent Generation
J. Am. Chem. Soc. 2011 133, 7684-7687 link
Chakrapani, V., Baker, D. and Kamat, P.V.
Understanding the Role of the Sulfide Redox Couple (S2-/Sn2-) in Quantum Dot Sensitized Solar Cells
J. Am. Chem. Soc. 2011 133, 9607-9615 link
See
complete list of publications
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