TY - JOUR
T1 - Fe–Zn–Ti combined systems as photocatalysts for hydroxyl radicals production in sunlight
AU - Cruz Santiago, Lorenzo Antonio
AU - Martínez Salazar, Ana Lidia
AU - Vega Moreno, Jesús
AU - Reséndiz Hernández, Omar
AU - Portales Martínez, Benjamín
N1 - Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC
PY - 2022/8/29
Y1 - 2022/8/29
N2 - In this research, we focused on a photocatalyst for hydroxyl radicals (•OH) production in sunlight and proposed to extend TiO2 photocatalytic capacity to a visible range by combining it with oxides derived from metals such as iron and zinc. The systems were synthesized through the sol-gel method and were characterized by TGA, FTIR-ATR, XRD, Raman, XPS, UV–Vis, and •OH quantification was carried out by disodium terephthalate hydroxylation reaction. Two key annealing temperatures of 400 and 800 °C, were detected by TGA studies. The iron-systems treated at 400 °C show the best balance between •OH production and less degradation effect attributed to staggering bands potentials of α–Fe2O3, ZnO, and anatase phases detected by XRD, making them a good option for partial oxidation. On the other hand, the 800 °C treated systems have the worst •OH production due to some phases with narrow bandgap promoting a fast charge carriers recombination.
AB - In this research, we focused on a photocatalyst for hydroxyl radicals (•OH) production in sunlight and proposed to extend TiO2 photocatalytic capacity to a visible range by combining it with oxides derived from metals such as iron and zinc. The systems were synthesized through the sol-gel method and were characterized by TGA, FTIR-ATR, XRD, Raman, XPS, UV–Vis, and •OH quantification was carried out by disodium terephthalate hydroxylation reaction. Two key annealing temperatures of 400 and 800 °C, were detected by TGA studies. The iron-systems treated at 400 °C show the best balance between •OH production and less degradation effect attributed to staggering bands potentials of α–Fe2O3, ZnO, and anatase phases detected by XRD, making them a good option for partial oxidation. On the other hand, the 800 °C treated systems have the worst •OH production due to some phases with narrow bandgap promoting a fast charge carriers recombination.
KW - Anatase
KW - Hydroxyl radicals
KW - Partial oxidation
KW - Sunlight
KW - ZnO
KW - α–FeO
UR - http://www.scopus.com/inward/record.url?scp=85127548602&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2022.02.203
DO - 10.1016/j.ijhydene.2022.02.203
M3 - Artículo
AN - SCOPUS:85127548602
SN - 0360-3199
VL - 47
SP - 31888
EP - 31902
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 74
ER -
