Removal of Airborne Bacteria by Photocatalyst

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Removal of Airborne Bacteria by Photocatalyst

• Name Amy Van
• Level Senior
• Number of Semesters Participated 1 semester
• Date of Submission December 12, 2003
• Advisor Dr. Stefanakos
• Department Electrical Engineering

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Introduction

• Titanium dioxide as photocatalyst
• Semiconductor
• Biologically and chemically inert
• Very photoactive

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Introduction

• Band gap 3.2 eV
• Activated in UV light 380 nm
• Electrons in valence band excited and injected in
  conduction band
• Produced holes in valence band
• Holes have highly reactive oxidation and
  reduction potential
• Catalytic reactions on the surface of the
  photocatalyst.

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Experimental Procedure
 
           
20 ml solution of rare earth metal and water  
4 g TiO2    
Stir 3 hrs
TiO2 and Solution (Slurry)  
Dry 100 C, 24 hrs
Impregnated TiO2    
Calcine 500 C, 24 hrs
Pure impregnated TiO2    
Results Pending..