ARTIFICIAL PHOTOSYNTHESIS

ARTIFICIAL PHOTOSYNTHESIS

NIKTA RAJPAL ROLL NO.-601101019 M.TECH EST

THE SUN: MAIN SOURCE OF ENERGY FOR LIFE ON EARTH

NATURAL PHOTOSYNTHESIS

Photosynthesis is a process used by plants and other organisms to capture the sun's energy to split off water,hydrogen from oxygen.

Chlorophyll is the main pigment of photosynthesis.

Also carotenes, xanthophylls etc are the pigments.

• Almost all plants are photosynthetic autotrophs (self producing), as are some bacteria and protozoas.– Autotrophs generate their own organic matter

through photosynthesis– Sunlight energy is transformed to energy stored in the form of chemical bonds

THE BASICS OF PHOTOSYNTHESIS

Light Energy Harvested by Plants & Other Photosynthetic Autotrophs

The research demonstrates a new route for artificial photosynthesis .

Bio cell uses photosynthesis to generate electricity

Artificial photosynthesis:

It is a chemical process that replicates the natural process of photosynthesis.

It refers to design a model for capturing and storing the energy from sunlight in the chemical bonds of a fuel.Design includes:1. A light harvesting molecule,Ruthenium complex.2. Tyrosine, mediating the electron transfer.3. A Manganese complex,sends electron to ruthenium

An idealized molecular artificial photosynthetic system consists of five essential components

A light-harvesting antenna, A photosensitized charge separating site, An O2 evolving catalyst, A H2 evolving catalyst, A membrane isolating the catalysts 

Process :

Process contd…

Comparison b/w Natural and Artificial Photosynthesis

In the system, there is an oxide layer(for example TiO2) which to allow for electronic conduction to take place.

The material of oxide layer is attached to a monolayer of the charge transfer dye.

Photo excitation of the dye results in the injection of an electron into the conduction band of the oxide.

Usually the iodide/triiodide couple restors the original state of the dye

The dye-sensitized solar cell approach

Process of dye sensitized solar cell..

Applications

Energy predicament.

Benefits over photovoltaic cells.

Potential to produce more than one type of fuel.

No harmful products generation.

The ability to produce a clean fuel.

It wouldn't require mining, growing or

drilling.

Carbon di oxide and water is a limitless

source.

Remove large amounts of harmful

CO2 from the air . 

Artificial Photosynthesis: A win-win situation

Challenges Not ready for mass consumption.

It is a method of trial and error.

Catalysts create problems in man- made systems

stability is an issue

Future prospects

Molecular nanoparticles are cheaper and ecofriendly.

Reverse global warming.

Recent Advancements

2) Toyota CRDL Succeeds in World's First Artificial Photosynthesis Using only Water and CO2.

Thank you….