Photocatalytic Inactivation of Escherichia coli with LbL Fabricated Immobilized TiO2 Thin Films
-
Sharad Sontakke
and
Giridhar Madras
Abstract
Photocatalysis using semiconductor catalyst such as TiO2, in presence of UV light, is a promising technique for the inactivation of various microorganisms present in water. In the current study, the photocatalytic inactivation of Escherichia coli bacteria was studied with commercial Degussa Aeroxide TiO2 P25 (Aeroxide) and combustion synthesized TiO2 (CS TiO2) catalysts immobilized on glass slides in presence of UV irradiation. Thin films of the catalyst and polyelectrolytes, poly(allyl amine hydrochloride) and poly(styrene sulfonate sodium salt), were deposited on glass slides by layer by layer (LbL) deposition method and characterized by SEMand AFMimaging. The effect of various parameters, namely, catalyst concentration, surface area and number of bilayers, on inactivation was studied. Maximum inactivation of 8-log reduction in the viable count was observed with 1.227 mg/cm2 of catalyst loaded slides. With this loading, complete inactivation was observed within 90 min and 75 min of irradiation, for Aeroxide and CS TiO2, respectively. Further increase in the catalyst concentration or increasing number of bilayers had no significant effect on inactivation. The effect of surface area on the inactivation was studied by increasing the number of slides and the inactivation was observed to increase with increasing surface area. It was also observed that the immobilized catalyst slides can be used for several cycles leading to an economic process. The study shows potential application of TiO2, for the inactivation of bacteria, in its fixed form by a simple immobilization technique.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Application of Fenton’s Reaction for Food-processing Wastewater Treatment
- Degradation of Acid Orange 7 Solution by Air-liquid Gliding Arc Discharge in Combination with TiO2 Catalyst
- Comparing the Formation of Bromate and Bromoform Due to Ozonation and UV-TiO2 Oxidation in Seawater
- Degradation of Ibuprofen Sodium Salt in a Hybrid Photolysis – Membrane Distillation System Utilizing Germicidal UVC Lamp
- Significance of TiO2 Photocatalysis for Green Chemistry
- Electrochemical Treatment of Segregated Effluents from the D-Stage in ECF Kraft Cellulose Bleaching
- A Study on the Removal of Natural Organic Matter and Disinfection Byproducts Formation Potential from Groundwater Using Fenton’s Process
- Investigation of Electric Discharge Sound in Atmospheric Pressure Plasma Using Optical Wave Microphone
- Formal Bimolecular Kinetic Model for the Ozonation of Ciprofloxacin in the Liquid Phase
- Removing Estrogenic Steroids from Waters: The Role of Reducing Hydrated Electron Reactions
- Photocatalytic Inactivation of Escherichia coli with LbL Fabricated Immobilized TiO2 Thin Films
- Solution Combustion Synthesis of BiVO4 Nanoparticles: Effect of Combustion Precursors on the Photocatalytic Activity
- Antibacterial Activity Inhibition after the Degradation of Flumequine by UV/H2O2
- Photocatalytic Degradation of Acid Red G by Bismuth Titanate in Three-phase Fluidized Bed Photoreactor
- Catalytic Epoxidation of Allyl Alcohol with Hydrogen Peroxide under Autogenic Pressure over Ti-MWW Catalyst
- Recent Progress of Nano-Seconds Pulsed Discharge and its Applications
- Ozonation of Municipal Secondary Effluent; Removal of Hazardous Micropollutants and Related Changes of Organic Matter Composition
- Effect of Post-annealing on the Photocatalytic Activity of Hydrothermally Synthesised Titania Nanotubes
- Low Temperature Preparation of Porous Crystalline TiO2 Films Using a Combination of Electrochemical and Electrophoretical Deposition
- Decomposition of Trichloroethylene with Plasma-catalysis: A review
Articles in the same Issue
- Application of Fenton’s Reaction for Food-processing Wastewater Treatment
- Degradation of Acid Orange 7 Solution by Air-liquid Gliding Arc Discharge in Combination with TiO2 Catalyst
- Comparing the Formation of Bromate and Bromoform Due to Ozonation and UV-TiO2 Oxidation in Seawater
- Degradation of Ibuprofen Sodium Salt in a Hybrid Photolysis – Membrane Distillation System Utilizing Germicidal UVC Lamp
- Significance of TiO2 Photocatalysis for Green Chemistry
- Electrochemical Treatment of Segregated Effluents from the D-Stage in ECF Kraft Cellulose Bleaching
- A Study on the Removal of Natural Organic Matter and Disinfection Byproducts Formation Potential from Groundwater Using Fenton’s Process
- Investigation of Electric Discharge Sound in Atmospheric Pressure Plasma Using Optical Wave Microphone
- Formal Bimolecular Kinetic Model for the Ozonation of Ciprofloxacin in the Liquid Phase
- Removing Estrogenic Steroids from Waters: The Role of Reducing Hydrated Electron Reactions
- Photocatalytic Inactivation of Escherichia coli with LbL Fabricated Immobilized TiO2 Thin Films
- Solution Combustion Synthesis of BiVO4 Nanoparticles: Effect of Combustion Precursors on the Photocatalytic Activity
- Antibacterial Activity Inhibition after the Degradation of Flumequine by UV/H2O2
- Photocatalytic Degradation of Acid Red G by Bismuth Titanate in Three-phase Fluidized Bed Photoreactor
- Catalytic Epoxidation of Allyl Alcohol with Hydrogen Peroxide under Autogenic Pressure over Ti-MWW Catalyst
- Recent Progress of Nano-Seconds Pulsed Discharge and its Applications
- Ozonation of Municipal Secondary Effluent; Removal of Hazardous Micropollutants and Related Changes of Organic Matter Composition
- Effect of Post-annealing on the Photocatalytic Activity of Hydrothermally Synthesised Titania Nanotubes
- Low Temperature Preparation of Porous Crystalline TiO2 Films Using a Combination of Electrochemical and Electrophoretical Deposition
- Decomposition of Trichloroethylene with Plasma-catalysis: A review
