TY - JOUR
T1 - Photodegradation of 2,4-dichlorophenoxyacetic acid using ZnAlFe layered double hydroxides as photocatalysts
AU - Mantilla, A.
AU - Tzompantzi, F.
AU - Fernández, J. L.
AU - Díaz Góngora, J. A.I.
AU - Mendoza, G.
AU - Gómez, R.
PY - 2010/10/30
Y1 - 2010/10/30
N2 - ZnAlFe layered double hydroxides (LDHs) with different Zn:Al:Fe ratio were obtained by the co-precipitation method and tested as photocatalysts for 2,4-dichlorophenoxyacetic acid (2,4-D) degradation. High specific surface areas (138-70 m2/g) as well as semiconductor properties (band gap values of 2.59-2.00 eV) were obtained in the samples calcined at 673 K. When calcined samples were put in contact with as solution containing 300 ppm of 2,4-D, the reconstruction of the LDHs (memory effect) and an unexpected high capacity of 2,4-D adsorption were observed. The photodegradation in aqueous phase after saturation of the LDHs with 2,4-D showed that the confined (adsorbed) 2,4-D can be successfully degraded with ZnAlFe LDH photocatalysts.
AB - ZnAlFe layered double hydroxides (LDHs) with different Zn:Al:Fe ratio were obtained by the co-precipitation method and tested as photocatalysts for 2,4-dichlorophenoxyacetic acid (2,4-D) degradation. High specific surface areas (138-70 m2/g) as well as semiconductor properties (band gap values of 2.59-2.00 eV) were obtained in the samples calcined at 673 K. When calcined samples were put in contact with as solution containing 300 ppm of 2,4-D, the reconstruction of the LDHs (memory effect) and an unexpected high capacity of 2,4-D adsorption were observed. The photodegradation in aqueous phase after saturation of the LDHs with 2,4-D showed that the confined (adsorbed) 2,4-D can be successfully degraded with ZnAlFe LDH photocatalysts.
KW - 2,4-D adsorption
KW - 2,4-Dichlorophenoxyacetic acid
KW - LDHs co-precipitation
KW - LDHs memory effect
KW - LDHs photocatalysts
KW - ZnAlFe layered double hydroxides
UR - http://www.scopus.com/inward/record.url?scp=74349118855&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2009.02.036
DO - 10.1016/j.cattod.2009.02.036
M3 - Artículo
SN - 0920-5861
VL - 148
SP - 119
EP - 123
JO - Catalysis Today
JF - Catalysis Today
IS - 1-2
ER -