TY - GEN
T1 - Role of nanocrystalline titania phases in the photocatalytic oxidation of NO at room temperature
AU - Castillo, S.
AU - Carrera, R.
AU - Camposeco, R.
AU - Del Ángel, P.
AU - Montoya, J. A.
AU - Vázquez, A. L.
AU - Morán-Pineda, M.
AU - Gómez, R.
PY - 2010
Y1 - 2010
N2 - Nanocrystalline TiO2 powders were prepared by the sol-gel method and evaluated in the NO photocatalytic oxidation. Samples annealed at 200 and 500°C (TiO2-P-200, TiO2-P-500) were characterized by nitrogen adsorption, XRD-Rietveld refinements, TEM, FTIR and UV-vis spectroscopies. The photocatalytic test of the sol-gel TiO2 samples was carried out in an insulated chamber with 10 ppm of NO, using a 365-nm UV light lamp; the test results were compared with those obtained with a commercial catalyst (P25). Improved photoactivity (89 % of NO oxidized in 60 min) was obtained with the TiO2-P-200 solid which showed high surface area, small crystallite size, higher amount of OH and highly abundant brookite phase (37.2 %) coexisting with the anatase phase (62.8 %). The photo-oxidation activity of the sol-gel catalyst annealed at 500 °C (TiO2-P- 500) showed changes in its textural and morphologic properties and therefore, less photoactivity. Sol-gel photocatalysts could be a good option for abating pollution in both indoor and outdoor environments at room temperature.
AB - Nanocrystalline TiO2 powders were prepared by the sol-gel method and evaluated in the NO photocatalytic oxidation. Samples annealed at 200 and 500°C (TiO2-P-200, TiO2-P-500) were characterized by nitrogen adsorption, XRD-Rietveld refinements, TEM, FTIR and UV-vis spectroscopies. The photocatalytic test of the sol-gel TiO2 samples was carried out in an insulated chamber with 10 ppm of NO, using a 365-nm UV light lamp; the test results were compared with those obtained with a commercial catalyst (P25). Improved photoactivity (89 % of NO oxidized in 60 min) was obtained with the TiO2-P-200 solid which showed high surface area, small crystallite size, higher amount of OH and highly abundant brookite phase (37.2 %) coexisting with the anatase phase (62.8 %). The photo-oxidation activity of the sol-gel catalyst annealed at 500 °C (TiO2-P- 500) showed changes in its textural and morphologic properties and therefore, less photoactivity. Sol-gel photocatalysts could be a good option for abating pollution in both indoor and outdoor environments at room temperature.
KW - Anatase-brookite phases
KW - Crystallite size
KW - NO photo-oxidation
KW - TiO nanocrystalline
UR - http://www.scopus.com/inward/record.url?scp=78651227337&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.132.96
DO - 10.4028/www.scientific.net/AMR.132.96
M3 - Contribución a la conferencia
AN - SCOPUS:78651227337
SN - 9780878492404
T3 - Advanced Materials Research
SP - 96
EP - 104
BT - Advances in New Catalytic Materials
T2 - 2nd International Symposium on New Catalytic Materials, NCM-2
Y2 - 16 August 2009 through 20 August 2009
ER -