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Silver and Phosphate Functionalized Reactive TiO2/Polymer Composite Films for Destructions of Resistent Bacteria Using Visible Light
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Ágnes Veres
Published/Copyright:
November 30, 2016
Abstract
Phosphate and silver co-functionalized TiO2 catalysts were prepared by varying amount of silver (0-1 wt.%) with constant phosphate content (0.25 wt.%). Two methods, the well-know photodeposition and a new simple method, i.e. heterocoagulation, are presented for preparing Ag-TiO2 and the optical, photochemical and photobiological properties of the different samples have been compared. Due to the silver modification, the photocatalysts showed a new Plasmon resonance peak at λmax= 455 nm. The photocatalytic efficiencies of the new photo catalysts were studied under UV-A/visible (λ > 360 nm) irradiation. Mechanically stable hydrophilic poly(EA-co-MMA) and hydrophobic poly(Bi.A-co-Ech.) based composite films were prepared by spray coating technique. The photocatalytic efficiencies decreased only by ~ 15% on the hydrophilic and ~ 63% on the hydrophobic polymer compared to the reference pure photocatalyst films. The antibacterial activity of the films was also studied under visible light (λ > 400 nm) irradiation. Methicillin resistant Staphylococcus aureus (MRSA) was used as test bacterium. The best antibacterial activity (90% of bacteria destruction in 15 minutes) could be observed on the Ag- TiO2/p(EA-co-MMA) film.
Received: 2011-7-16
Revised: 2011-11-8
Accepted: 2011-11-9
Published Online: 2016-11-30
Published in Print: 2012-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Keywords for this article
titanium dioxide;
functionalization;
polymer;
nanosilver;
phosphorus;
antibacterial
Articles in the same Issue
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- The Influence of Solution Composition on the Effectiveness of Degradation of Ibuprofen Sodium Salt in a Hybrid Photocatalysis – Membrane Distillation System
- Antifungal Effect of Titanium Dioxide, Indoor Light and the Photocatalytic Process in In Vitro Test on Different Media
- Influence of Contaminants on Arc Properties during Treatment of Polluted Soils in Electric Arc Plasma
- DDT-Contaminated Soil Treatment with Persulfate and Hydrogen Peroxide Utilizing Different Activation Aids and the Chemicals Combination with Biosurfactant
- Landfill Leachate Treatment by Fenton, Photo-Fenton Processes and their Modification
- The Technological Parameters of Hydrochlorination of Glycerol to Dichloropropanols
- Characterization of TiO2 Modified with Bimetallic Ag/Au Nanoparticles Obtained inMicroemulsion System
- Application of Fenton´s Reagent for Acrylic Dyeing Wastewater Decolorization, Organic Matter Reduction and Biodegradability Improvement
- Photocatalytic and Self-cleaning Properties of Titania Coatings Prepared by Inkjet Direct Patterning of a Reverse Micelles Sol-gel Composition
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- Application of Fenton and Solar Photo-Fenton Processes to the Treatment of a Sanitary Landfill Leachate in a Pilot Plant with CPCs
- Raschig Rings Based on Pillared Clays: Efficient Reusable Catalysts for Oxidation of Phenol
- Assessing the Effect of Inorganic Anions on TiO2-Photocatalysis and Ozone Oxidation Treatment Efficiencies
- Heterogeneous Catalytic Supercritical Water Oxidation of Refractory Organic Pollutants in Industrial Wastewaters
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- Treatment of Composted Soils contaminated with Petroleum Hydrocarbons using Chemical Oxidation followed by Enhanced Aerobic Bioremediation
