TY - JOUR
T1 - In situ IR study of surface hydroxyl species of dehydrated TiO 2
T2 - Towards understanding pivotal surface processes of TiO 2 photocatalytic oxidation of toluene
AU - Lin, Huaxiang
AU - Long, Jinlin
AU - Gu, Quan
AU - Zhang, Wenxin
AU - Ruan, Rusheng
AU - Li, Zhaohui
AU - Wang, Xuxu
PY - 2012/7/14
Y1 - 2012/7/14
N2 - The surface species on P25-TiO 2 were characterized by FTIR after evacuation at 50-550 °C. The functions of OH groups on P25-TiO 2 catalysts have been tested by the adsorption and photooxidation of toluene in an in situ IR cell. FTIR studies show that the hydroxyl species on P25-TiO 2 are clearly temperature-dependent and P25-TiO 2 has six isolated hydroxyls with bands at 3734, 3715, 3688, 3671, 3658 and 3640 cm -1. The OH groups on P25 play different roles in the photo-oxidation process: surface hydroxyls with bands at 3688, 3671, 3658 and 3640 cm -1 act as adsorption sites while surface hydroxyls with bands at 3734 and 3715 cm -1 act as sources of the OH radical.
AB - The surface species on P25-TiO 2 were characterized by FTIR after evacuation at 50-550 °C. The functions of OH groups on P25-TiO 2 catalysts have been tested by the adsorption and photooxidation of toluene in an in situ IR cell. FTIR studies show that the hydroxyl species on P25-TiO 2 are clearly temperature-dependent and P25-TiO 2 has six isolated hydroxyls with bands at 3734, 3715, 3688, 3671, 3658 and 3640 cm -1. The OH groups on P25 play different roles in the photo-oxidation process: surface hydroxyls with bands at 3688, 3671, 3658 and 3640 cm -1 act as adsorption sites while surface hydroxyls with bands at 3734 and 3715 cm -1 act as sources of the OH radical.
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U2 - 10.1039/c2cp40893g
DO - 10.1039/c2cp40893g
M3 - Article
C2 - 22652962
AN - SCOPUS:84862559783
SN - 1463-9076
VL - 14
SP - 9468
EP - 9474
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 26
ER -