TY - JOUR
T1 - High temperature stability of anatase in titania-alumina semiconductors with enhanced photodegradation of 2, 4-dichlorophenoxyacetic acid
AU - López-Granada, G.
AU - Barceinas-Sánchez, J. D.O.
AU - López, R.
AU - Gómez, R.
N1 - Funding Information:
Maria Guadalupe López Granada is grateful for the Doctoral scholarship granted ( 96462 ) by CONACYT , México.
PY - 2013/12/15
Y1 - 2013/12/15
N2 - The incorporation of aluminum acetylacetonate as alumina source during the gelation of titanium alkoxide reduces the nucleation sites for the formation of large rutile crystals on temperatures ranging from 400 to 800°C. As a result, the aggregation of anatase crystals is prevented at high temperature. A relationship among the specific surface area, pore size, energy band gap, crystalline structure and crystallite size as the most relevant parameters are evaluated and discussed. According to the results for the photocatalytic degradation of 2,4-dichlorophenoxyacetic acid, the specific surface area, pore size, Eg band gap are not determinant in the photocatalytic properties. It was found that the anatase crystallite size is the mores important parameter affecting the degradation efficiency.
AB - The incorporation of aluminum acetylacetonate as alumina source during the gelation of titanium alkoxide reduces the nucleation sites for the formation of large rutile crystals on temperatures ranging from 400 to 800°C. As a result, the aggregation of anatase crystals is prevented at high temperature. A relationship among the specific surface area, pore size, energy band gap, crystalline structure and crystallite size as the most relevant parameters are evaluated and discussed. According to the results for the photocatalytic degradation of 2,4-dichlorophenoxyacetic acid, the specific surface area, pore size, Eg band gap are not determinant in the photocatalytic properties. It was found that the anatase crystallite size is the mores important parameter affecting the degradation efficiency.
KW - Photocatalytic activity
KW - Sol-gel process
KW - Structural properties
KW - Textural properties
KW - Titania-alumina
UR - http://www.scopus.com/inward/record.url?scp=85058720880&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2013.07.060
DO - 10.1016/j.jhazmat.2013.07.060
M3 - Artículo
SN - 0304-3894
VL - 263
SP - 84
EP - 92
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -