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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 |
D. R. Baker and P.V. Kamat
Photosensitization of TiO2 Nanostructures with CdS Quantum Dots. Particulate versus Tubular Support Architectures
Adv. Funct. Mater. 2009 19, 805-11 link
P.V. Kamat
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters
J. Phys. Chem. C 2008 112, 18737-53. (Centennial Feature Article) link
A. Kongkanand, K. Tvrdy, K. Takechi, M.K. Kuno and P.V. Kamat
Quantum dot solar cells. Tuning photoresponse through size and shape control of CdSe-TiO2 architecture
J. Am. Chem. Soc. 2008 130, 4007-15 link
P.R. Brown, K. Takechi and P.V. Kamat
Single-walled carbon nanotube scaffolds for dye-sensitized solar cells
J. Phys. Chem. C 2008 112, 4776-82 link
G. Williams, B. Seger and P.V. Kamat
TiO2-Graphene Nanocomposites. UV-Assisted Photocatalytic Reduction of Graphene Oxide
ACS Nano 2008 2, 1487-1491 link
R. Muszynski, B. Seger and P.V. Kamat
Decorating graphene sheets with gold nanoparticles
J. Phys. Chem. C 2008 112, 5263-6 link
See
complete list of publications
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