TY - JOUR
T1 - XANES studies of photocatalytic active species in nano TiO2-SiO2
AU - Li Hsiung, Tung
AU - Paul Wang, H.
AU - Wang, H. C.
N1 - Funding Information:
The financial support of the National Science Council, Taiwan is gratefully acknowledged. We also thank Prof. Y.W. Yang and Dr. Jyh-Fu Lee of the NSRRC for their XAS experimental assistances.
PY - 2006/11
Y1 - 2006/11
N2 - Combined post-edge XANES (X-ray absorption near-edge structural) and 29Si magic angle spinning solid-state nuclear magnetic resonance (MAS SSNMR) observations show that Ti was dispersed in the frameworks of nano SiO2 (synthesized with the sol-gel method). In addition, the nano TiO2-SiO2 photocatalyst have features such as A1 (4969 eV), A2 (4970.5 eV) and A3 (4972 eV) that can be attributed to 1s-to-3d transitions for four- (TiO4), five- ((Ti=O)O4), and six- (TiO6) coordinated Ti species, respectively. The A2 ((Ti=O)O4) in TiO2-SiO2 may be the main active species, for instance, in the photocatalytic decomposition of trace 2-chlorophenol in H2O. This work exemplifies the utilization of XANES to reveal the active species in nano photocatalysts in detail.
AB - Combined post-edge XANES (X-ray absorption near-edge structural) and 29Si magic angle spinning solid-state nuclear magnetic resonance (MAS SSNMR) observations show that Ti was dispersed in the frameworks of nano SiO2 (synthesized with the sol-gel method). In addition, the nano TiO2-SiO2 photocatalyst have features such as A1 (4969 eV), A2 (4970.5 eV) and A3 (4972 eV) that can be attributed to 1s-to-3d transitions for four- (TiO4), five- ((Ti=O)O4), and six- (TiO6) coordinated Ti species, respectively. The A2 ((Ti=O)O4) in TiO2-SiO2 may be the main active species, for instance, in the photocatalytic decomposition of trace 2-chlorophenol in H2O. This work exemplifies the utilization of XANES to reveal the active species in nano photocatalysts in detail.
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U2 - 10.1016/j.radphyschem.2005.11.021
DO - 10.1016/j.radphyschem.2005.11.021
M3 - Article
AN - SCOPUS:33750169179
SN - 0969-806X
VL - 75
SP - 2042
EP - 2045
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
IS - 11 SPEC. ISS.
ER -