XANES studies of photocatalytic active species in nano TiO2-SiO2

Tung Li Hsiung; H. Paul Wang; H. C. Wang

doi:10.1016/j.radphyschem.2005.11.021

XANES studies of photocatalytic active species in nano TiO₂-SiO₂

Tung Li Hsiung, H. Paul Wang, H. C. Wang

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2042-2045
Number of pages	4
Journal	Radiation Physics and Chemistry
Volume	75
Issue number	11 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.radphyschem.2005.11.021
Publication status	Published - 2006 Nov

All Science Journal Classification (ASJC) codes

Radiation

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10.1016/j.radphyschem.2005.11.021

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title = "XANES studies of photocatalytic active species in nano TiO2-SiO2 ",

abstract = "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.",

author = "{Li Hsiung}, Tung and {Paul Wang}, H. and Wang, {H. C.}",

note = "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.",

year = "2006",

month = nov,

doi = "10.1016/j.radphyschem.2005.11.021",

language = "English",

volume = "75",

pages = "2042--2045",

journal = "Radiation Physics and Chemistry",

issn = "0969-806X",

publisher = "Elsevier Limited",

number = "11 SPEC. ISS.",

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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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DO - 10.1016/j.radphyschem.2005.11.021

M3 - Article

AN - SCOPUS:33750169179

SN - 0969-806X

VL - 75

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EP - 2045

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

IS - 11 SPEC. ISS.

ER -

XANES studies of photocatalytic active species in nano TiO₂-SiO₂

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