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Rhodamine B Discolouration on TiO2 in the Cement Environment: A Look at Fundamental Aspects of the Self-cleaning Effect in Concretes
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A. Folli
Published/Copyright:
November 30, 2016
Abstract
The present work addresses the photocatalytic properties of two commercial titanias for application in concrete technology. A microsized, m-TiO2 (average particle size 153.7 nm ± 48.1 nm) and a nanosized, n-TiO2 (average particle size 18.4 nm ± 5.0 nm) have been tested. Cement paste samples (CEMI 52.5 cement, w/c=0.4) containing both photocatalysts have been evaluated based on Rhodamine B (RhB) discolouration under U.V. light, a standard test for self-cleaning cementitious materials. Experimental data are discussed in relation to photocatalyst properties (e.g.: particle size), dye adsorption and degradation characteristics. The influence of the chemical environment on photocatalyst performance and its impact on applications in construction concrete are also discussed.
Received: 2008-9-22
Accepted: 2008-12-18
Published Online: 2016-11-30
Published in Print: 2009-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Synthesis of TiO2/Au Nanocomposites via Sol-Gel Process for Photooxidation of Methanol
- Design of CeyCoxTi (1-x) O3+δ Perovskite for Photocatalysis: A Statistical Study
- Electro-Fenton Treatment of TNT in Aqueous Media in Presence of Cyclodextrin. Application to Ex-situ Treatment of Contaminated Soil
- A Quantum Mechanical Approach to TiO2 Photocatalysis
- Removal of Color Compounds from Recycled Water Using Combined Activated Carbon Adsorption and AOP Decomposition
- Preparation of Co-doped TiO2 for Photocatalytic Degradation of NOx in Air under Visible Light
- Depletion of Several Antibiotics Used in Industrial Process Using Immobilized TiO2
- Oxidative Pretreatment of Fresh and Mature Landfill Leachate
- Titanium Dioxide onto Polyethylene for Water Decontamination
- Application of Photocatalysis for the Removal of Natural Organic Matter in Simulated Surface and Ground Waters
- Photocatalytic Treatment of A Dye Polluted Industrial Effluent With A Solar Pilot-Scale CPC Reactor
- Evaluation of the Algaecide Activity of Titanium Dioxide on Autoclaved Aerated Concrete
- Degradation of 4-n-nonylphenol in Water by 20 kHz Ultrasound
- Integration of Photocatalysis with Ultrafiltration or Membrane Distillation for Removal of Azo Dye Direct Green 99 from Water
- Binder Effect on Photocatalytic Performance of TiO2 Solution Coating Layers
- Rhodamine B Discolouration on TiO2 in the Cement Environment: A Look at Fundamental Aspects of the Self-cleaning Effect in Concretes
- Effects of Inorganic Anions and Humic Acid on the Photocatalytic and Ozone Oxidation of Oxytetracycline in Aqueous Solution
