Nanophotocatalyst basics and its application in different organic transformations

1. NANOPHOTOCATALYSTS
FOR ORGANIC
TRANSFORMATIONS
ASHWANI KUMAR1

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Chlorophyll of plants is a
typical natural photocatalyst.
Chlorophyll captures sunlight
to turn water and carbon
dioxide into oxygen and
glucose.
In the presence of light and water,
photocatalyst creates strong
oxidising agent and electronic
holes to breakdown the organic
matter to carbon dioxide and water
Photocatalyst
A photocatalyst is a substance that uses light energy to facilitate a
chemical reaction .

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Nanoparticles necessary for photocatalyst with high activity
 Small size
 The big surface area
 Shape and size of
interactive surface
 Adsorption potential
A good
photocatalyst
with high activity
Types of Nanophotocatalyst
 Semi-conductor
 Plasmon-mediated
 Metal-organic framework based materials
Graphene-semiconductor
Non-metal doped semiconductor
Metal-modified semiconductor
. . . . . . .

4. LITERATURE SURVEY
SEMICONDUCTORS BASED NANOPHOTOCATALYST
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5. PROBLEM Alternative
 Doped TiO2
 CdS(band gap
2.4 eV )
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6. NANOCOMPOSITE OF TWO SEMICONDUCTORS
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No e- hole pair recombination in TiO2,therefore
participate in reduction reactions efficiently.

7. SURFACE PLASMON RESONANCE- MEDIATED
NANOPHOTOCATALYST
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Direct photocatalysis Indirect photocatalysis

8. MOF BASED NANOPHOTOCATALYST
Limitations
 Low solubility
 hydrolysis results
in collapsing pore
structure, reduces
photoactivity
Challenge
 Develop MOFs
that are stable
enough to give
appreciable
conversions
photochemically
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Metal
Organic Ligands

9. RECENT ADVANCEMENT IN THIS FIELD
HETEROLEPTIC CU-BASED SENSITIZERS IN
PHOTOREDOX CATALYSIS
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10. PHOTOCATALYTIC ANION OXIDATION AND
APPLICATIONS IN ORGANIC SYNTHESIS
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12. PHOTOCATALYTIC SYSTEMS WITH FLAVINIUM SALTS: FROM
PHOTOLYASE MODELS TO SYNTHETIC TOOL FOR
CYCLOBUTANE RING OPENING
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Thank You