Evaluation of Reaction Mechanism for Photocatalytic Degradation of Dye with Self-Sensitized TiO2 under Visible Light Irradiation
Open Access
- 1 January 2017
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in Open Journal of Inorganic Non-metallic Materials
- Vol. 07 (01), 1-7
- https://doi.org/10.4236/ojinm.2017.71001
Abstract
The dye-sensitized TiO2 method is one of the most promising methods for the visible-light-induced detoxification of pollutants. The reaction mechanism for photocatalytic degradation of orange II (OII) and rhodamine B (RhB) with self-sensitized TiO2 under visible light irradiation (λ > 400 nm) has been evaluated. Radical scavenger studies were carried out to investigate the active species involved in the photodegradation of 5 mg/L of initial concentration of OII and RhB at room temperature. The trapping effects of different scavengers results proved that the oxidation of OII and RhB mainly occurred by the direct oxidization of h+ and ·O2- radicals, while the ·OH radicals played only a relatively minor role in the direct oxidization process.Keywords
This publication has 17 references indexed in Scilit:
- Photocatalytic degradation of bisphenol A by Ag3PO4 under visible lightCatalysis Communications, 2013
- Visible–Light–Induced Photodegradation of Rhodamine B over Hierarchical TiO2: Effects of Storage Period and Water-Mediated Adsorption SwitchIndustrial & Engineering Chemistry Research, 2012
- Visible-Solar-Light-Driven Photocatalytic Degradation of Phenol with Dye-Sensitized TiO2: Parametric and Kinetic StudyIndustrial & Engineering Chemistry Research, 2012
- Review: Dye sensitized solar cells based on natural photosensitizersRenewable and Sustainable Energy Reviews, 2012
- Photocatalytic degradation of rhodamine B by dye-sensitized TiO2 under visible-light irradiationScience in China Series B Chemistry, 2011
- Dye sensitized visible light degradation of phenolic compoundsChemical Engineering Journal, 2010
- A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen productionRenewable and Sustainable Energy Reviews, 2007
- Titanium dioxide photocatalysisJournal of Photochemistry and Photobiology C: Photochemistry Reviews, 2000
- Quantum yields of active oxidative species formed on TiO2 photocatalystJournal of Photochemistry and Photobiology A: Chemistry, 2000
- Physical Chemistry of Semiconductor−Liquid InterfacesThe Journal of Physical Chemistry, 1996