Self cleaning surface with dual functionality
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Self cleaning surface with dual functionality Super hydrophobicity Photo catalytic activity NISHANT KUMAR SONY MTECH SOLID STATE TECHNOLOGY INDIAN INSTITUTE OF KHARAGPUR 16PH62R03
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Transcript of Self cleaning surface with dual functionality
Self cleaning surface with dual functionality
Super hydrophobicityPhoto catalytic activity
NISHANT KUMAR SONYMTECH SOLID STATE TECHNOLOGYINDIAN INSTITUTE OF KHARAGPUR
16PH62R03
Self cleaning behavior Superhydrophobicity Photo catalytic activity Preparation of self cleaning surface Application
Content
Various contaminants on the solid surface can be eliminated naturally.
Example of self cleaning behavior is lotus leaves surface-
Nano structured hydrophobic domain and micro meter-scale of roughness superimpose, resulting surface having dual functionality at the same time.
Self cleaning behavior
Super hydrophobicity generally refers to the surface with a water contact angle exceeding 150 .
Water droplet on superhydrophobic surface can sweep dust particle existing on the surface i.e. dust particle existing on the surface can efficiently be removed under rain.
Superhydrophobicity is a macroscopic phenomena.
Super hydrophobicity
Photocatalysis means acceleration of photoreaction in presence of a catalyst.
Photocatalytic activity depends on the ability of catalyst to create electron hole pair.
Photocatalytic material is generally wide band gap semiconductor inorganic material.
Organic molecule adsorb on photocatalytically active surface, get decomposed by these strong oxidizing agents and get transformed into H2O and CO2.
Photo catalytic activity
SiO2 nanoparticle is coated on the glass surface with poly dimethyl siloxane (PDMS).
Heating the coated glass then PDMS molecules are vaporized.
Hydrophobic glass surface is prepared with thin film of SiO2 nanoparticle.
Photocatalytic surface is prepared by deposition of TiO2 nanoparticle on an adhesive surface.
Preparation of self cleaning surface
Maintain the efficiency of solar cell Ultra dry surface application Reduction of corrosion
Application
Eun Ji Parka, Hye Soo Yoona,Dae Han Kima, Yong Ho Kima,Young Dok Kima, Preparation of self-cleaning surfaces with a dual functionality of superhydrophobicity and photocatalytic activity,j. Applied Surface Science 319 (2014) 367–371 .
http://www.sciencedirect.com/science/article/pii/S0926337314006158
Reference
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