What Are Titania Photocatalysts?―An Exploratory Correlation of Photocatalytic Activity with Structural and Physical Properties
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Bunsho Ohtani
,
Orlando Omar Prieto Mahaney
Abstract
This article reports on an exploratory statistical analysis of the photocatalytic activity of titanium(IV) oxide (TiO2; titania) using forty commercially available titania samples. Five photocatalytic reactions were examined as test reactions for the evaluation of photocatalytic activity of the samples: oxygen liberation along with silver deposition, methanol dehydrogenation, acetic acid decomposition, acetaldehyde decomposition and synthesis of pipecolinic acid from L-lysine. Six structural and physical properties of the samples were measured: specific surface area (BET), density of defective sites (DEF), primary particle size (PPS), secondary particle size (SPS) and existence of anatase (ANA) and rutile (RUT) phases. Correlations of photocatalytic activities for the five kinds of reactions with structural and physical properties of 35 (out of 40) titania samples were obtained, and photocatalytic activities were empirically reproduced by a linear combination of six properties with good to fair reliability. While a portion of the results could be interpreted using a conventional mechanism, significant activity dependence on properties, not yet disclosed, was suggested.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Preface
- A Brief Survey of the Potential Health Risks of TiO2 Particles and TiO2- Containing Photocatalytic or Non-Photocatalytic Materials
- What Are Titania Photocatalysts?―An Exploratory Correlation of Photocatalytic Activity with Structural and Physical Properties
- Considerations of Particle Size in Aqueous Phase Photocatalysis kinetics with TiO2
- Binary Cationic BDDAC/Anionic DoS Surfactant Systems of Variable Compositions.Mineralization by an Advanced Oxidation Process in Aqueous Dispersions
- The Role of Non-Metal Doping in TiO2 Photocatalysis
- Photocatalysis and Catalytic Properties of Nano-sized N-TiO2 Catalyst Synthesized by Sol-gel Methods
- Effects of Surface Modification on the Photocatalytic Activity of TiO2
- Carbon-modified TiO2 as Photocatalysts
- Photocatalytic Reduction of Organic Compounds
- Photocatalytic Activity for NO Degradation by Construction Materials: Parametric Study andMultivariable Correlations
Articles in the same Issue
- Preface
- A Brief Survey of the Potential Health Risks of TiO2 Particles and TiO2- Containing Photocatalytic or Non-Photocatalytic Materials
- What Are Titania Photocatalysts?―An Exploratory Correlation of Photocatalytic Activity with Structural and Physical Properties
- Considerations of Particle Size in Aqueous Phase Photocatalysis kinetics with TiO2
- Binary Cationic BDDAC/Anionic DoS Surfactant Systems of Variable Compositions.Mineralization by an Advanced Oxidation Process in Aqueous Dispersions
- The Role of Non-Metal Doping in TiO2 Photocatalysis
- Photocatalysis and Catalytic Properties of Nano-sized N-TiO2 Catalyst Synthesized by Sol-gel Methods
- Effects of Surface Modification on the Photocatalytic Activity of TiO2
- Carbon-modified TiO2 as Photocatalysts
- Photocatalytic Reduction of Organic Compounds
- Photocatalytic Activity for NO Degradation by Construction Materials: Parametric Study andMultivariable Correlations
