Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/182286
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Palygorskite-TiO2 nanocomposites: Part 2. photocatalytic activities in decomposing air and organic pollutants |
Autor: | Papoulis, Dimitrios; Komarneni, Sridhar; Panagiotaras, Dionisios; Nikolopoulou, A.; Christoforidis, Konstantinos CSIC ORCID; Li, Huihui; Shu, Yin; Sato, Tsugio; Fernández, M. | Palabras clave: | Toluene Photocatalytic activity DeNOx process Nanocomposite Titania Palygorskite |
Fecha de publicación: | oct-2013 | Editor: | Elsevier | Citación: | Applied Clay Science 83-84: 198-202 (2013) | Resumen: | In this paper we measure the photocatalytic activities of small-sized TiO2 particles supported on palygorskite in five different proportions (TiO2:Pal ratios of 90:10, 80:20, 70:30, 60:40 and 50:50) in decomposing NO gas and a volatile organic compound (VOC, toluene). The prepared Pal-TiO2 nanocomposites showed significantly higher photocatalytic activity in decomposing NO gas under visible-light irradiation up to 2.6 times, and under UV light irradiation (λ > 290 nm) up to 1.17 times, than that of the commercial titania, P25. The best photocatalytic activities were measured for 30% palygorskite with 70% TiO2, which could be attributed to a combination of good dispersion, relatively low agglomeration and relatively high amount of TiO2. The photocatalytic efficiency of the prepared Pal-TiO2 samples in decomposing toluene was also tested. Under UV irradiation, all palygorskite-supported TiO2 samples showed larger catalytic activity compared to the commercial titania, P25. The reaction rates of toluene photo-oxidation were found to be 1.37–1.74 times greater than that of P25. The higher reaction rates corresponded to the samples containing 20–30% palygorskite. Under artificial solar-light irradiation all palygorskite-supported TiO2 catalysts showed higher toluene photo-oxidation rates compared to P25. The catalytic activity increased by 2.7–3.34 times under artificial solar-light irradiation. An increase in catalytic activity was observed with increasing TiO2 content up to 70%. The sample with 30% palygorskite and 70% TiO2 gave the highest reaction rates. Further decrease of palygorskite (increase of TiO2) content resulted in a decrease of the reaction rate. | Versión del editor: | https://doi.org/10.1016/j.clay.2012.03.003 | URI: | http://hdl.handle.net/10261/182286 | DOI: | 10.1016/j.clay.2012.03.003 | ISSN: | 0169-1317 | E-ISSN: | 1872-9053 |
Aparece en las colecciones: | (ICP) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
23
checked on 24-mar-2024
WEB OF SCIENCETM
Citations
22
checked on 28-feb-2024
Page view(s)
200
checked on 28-mar-2024
Download(s)
44
checked on 28-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.