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Presented byRavi Sreeddhar

Loyola college

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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

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Carbon dioxide is converted to food/fuel.

Light splits water to hydrogen and oxygen.

Hydrogen reacts with Carbon dioxide and reduces it to

Hydrocarbons.

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PHOTOSE

NSIT

IZERS

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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

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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.

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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.

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Fuel produced in this way is considered as recycled fuel andis eco friendly (to a certain extent).

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More research is to be done on applications of GreenNanoscience.

Scopes include a pollution-free planet and a brightfuture for our descendants.