green energy through nanoscience
TRANSCRIPT
-
8/10/2019 Green Energy through Nanoscience
1/11
Presented byRavi Sreeddhar
Loyola college
-
8/10/2019 Green Energy through Nanoscience
2/11
-
8/10/2019 Green Energy through Nanoscience
3/11
-
8/10/2019 Green Energy through Nanoscience
4/11
Materials synthesis and energy harvesting based onthe efficient and selective mechanisms of biology
Super-strong lightweight materials to improveefficiency of cars, airplanes, etc.
Reversible hydrogen storage materials operating atambient temperatures
-
8/10/2019 Green Energy through Nanoscience
5/11
Carbon dioxide is converted to food/fuel.
Light splits water to hydrogen and oxygen.
Hydrogen reacts with Carbon dioxide and reduces it to
Hydrocarbons.
-
8/10/2019 Green Energy through Nanoscience
6/11
PHOTOSE
NSIT
IZERS
-
8/10/2019 Green Energy through Nanoscience
7/11
STEP I SPLIT WATER
A promising route is to use the energy of sunlight to split water into
its constituent elements, oxygen and hydrogen is to illuminatesemiconductor catalysts such as titanium dioxide with ultraviolet lightsuccessfully split water to produce hydrogen.
The wavelength of lightnecessary for thisprocess must be shiftedto the more plentiful
visible range ofsunlight. Promisingresults have been found
on tuning the size ofthe catalyst particlesinto the nanometerscale, also on theaddition of nanoscaleadditives
-
8/10/2019 Green Energy through Nanoscience
8/11
Step II Reducing Carbon dioxide
The hydrogen in
previous step reacts withcarbon dioxide collectedunder specifictemperature pressure
A device designed to splitcarbon dioxide utilizes asemiconductor and twothin layers of powderednano-catalysts. It splitscarbon dioxide to generatecarbon monoxide andoxygen in a three-step
process.
-
8/10/2019 Green Energy through Nanoscience
9/11
First step is the capture of solar energy photons bythe semiconductor (GaP).
Second step is the conversion of optical energyinto electrical energy by the semiconductor.
Third step is the deployment of electrical energyto the catalysts. The nano-catalysts (Ni) convert
carbon dioxide to carbon monoxide on one side ofthe device and to oxygen on the other side.
Although carbon monoxide is poisonous, it ishighly sought after. Tonnes of it are used each
year to manufacture chemicals includingdetergents and plastics. It can also be convertedinto liquid fuel.
-
8/10/2019 Green Energy through Nanoscience
10/11
Fuel produced in this way is considered as recycled fuel andis eco friendly (to a certain extent).
-
8/10/2019 Green Energy through Nanoscience
11/11
More research is to be done on applications of GreenNanoscience.
Scopes include a pollution-free planet and a brightfuture for our descendants.