Influence of ionic strength in the adsorption and during photocatalysis of reactive black 5 azo dye on TiO2 coated on non woven paper with SiO2 as a binder
| Autor: | Stephan Brosillon, Jean Morvan, Abdelkahhar Aguedach, El Kbir Lhadi |
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| Přispěvatelé: | Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
Paper
Environmental Engineering Photochemistry Health Toxicology and Mutagenesis Inorganic chemistry Ionic bonding 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences Catalysis Water Purification chemistry.chemical_compound Adsorption Naphthalenesulfonates Environmental Chemistry Reactive dye [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Surface charge Point of zero charge Waste Management and Disposal ComputingMilieux_MISCELLANEOUS Titanium Osmolar Concentration Hydrogen-Ion Concentration Silicon Dioxide 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences chemistry Ionic strength Textile Industry Photocatalysis 0210 nano-technology |
| Zdroj: | Journal of Hazardous Materials Journal of Hazardous Materials, Elsevier, 2008, 150 (2), pp.250-256. ⟨10.1016/j.jhazmat.2007.04.086⟩ Journal of Hazardous Materials, 2008, 150 (2), pp.250-256. ⟨10.1016/j.jhazmat.2007.04.086⟩ |
| ISSN: | 0304-3894 1873-3336 |
| DOI: | 10.1016/j.jhazmat.2007.04.086 |
| Popis: | Reactive black 5 (RB5), an azo dye, was degraded by using UV-irradiated TiO 2 coated on non woven paper with SiO 2 as a binder. The adsorption capacity of the photocatalyst was studied at natural pH, superior to pH pzc of the binder, for various ionic strengths. Different salts such as NaCl, KCl, CaCl 2 , LiCl, Ca(NO 3 ) 2 were used to increase the ionic strength. The presence of salt increased the adsorption capacity. The electrostatic interactions between dye and oxide surface charges (TiO 2 /SiO 2 ) is very important in the adsorption phenomena. The effect of the ionic strength of the solution on photocatalyst degradation was studied. The rate of degradation was increased by the presence of salts in the range of the experimental conditions. The increase of the initial decolorization rate was observed in the following order: Ca 2+ > K + > Na + > Li + . Experiments with different anions (Cl − , NO 3 − ) had shown that nitrate was an indifferent electrolyte for the adsorption and photodegradation of the dye on SiO 2 /TiO 2 . |
| Databáze: | OpenAIRE |
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