Effect of Silver Addition on the Structure and Methylene Blue Photodagradation Capacity of Titania Synthesised via a Surfactant Template Route

Authors
Zubieta, Carolina Edith; Messina, Paula Verónica; Frechero, Marisa Alejandra; Schulz, Pablo Carlos
Publication Year
2010
Language
English
Format
article
Status
Published version
Description
Mesoporous titania was synthesized by a surfactant template route and was doped with Ag2O by treatment with AgNO3. Commercial anatase was also used as reference material. The obtained materials were characterized by nitrogen adsorption, scanning and transmission electron microscopy, solid state conductivity and X-ray diffraction. The inclusion of Ag reduced the specific area of the mesoporous material, modified its composition and aggregation state and produced heterogeneous surface depending on the Ag content. The conductivity of the solids is increased by Ag inclusion, but the increased activation energy reflects the difficulty of moving the larger Ag+ ions in comparison with Ti+ ones. Methylene blue was used as a reactive testing dye. The adsorption followed a first order kinetics. The thermodynamics of adsorption was studied. The photodegradation was studied by UV irradiation. The Ag-treated materials had better photodegradative behavior than the original non-doped one.
Fil: Zubieta, Carolina Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Messina, Paula Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Frechero, Marisa Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Schulz, Pablo Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Subject
Ssilver doped titania
Methylene blue
Photodegradation
Adsorption
Pollution
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/64069