Adsorption and photocatalytic degradation of 3-fluoroaniline on anatase tio2(101): A photoemission and near-edge x-ray absorption fine structure study

Mark J. Jackman; Andrew G. Thomas

doi:10.1021/jp4103405

Adsorption and photocatalytic degradation of 3-fluoroaniline on anatase tio2(101): A photoemission and near-edge x-ray absorption fine structure study

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Abstract

Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of 3-fluoroaniline on an anatase TiO2(101) single crystal. Photoemission results suggest that 3-fluoroaniline bonds through the amine group to a 5-fold coordinated surface Ti atom. Independently, 3-fluoroaniline also bonds to the surface via the fluorine atom; however, the carbon–fluorine bond undergoes fission to leave fluorine bound to the surface. Using the searchlight effect, the carbon K-edge NEXAFS spectra recorded for 3-fluoroaniline on anatase TiO2(101) shows the phenyl ring to be oriented at 90 ± 5° from the surface and twisted 10 ± 5° relative to the ⟨010⟩ direction. When 3-fluoroaniline bonded on anatase TiO2(101) is irradiated with UV light (4.8 eV), the molecule is almost completely desorbed from the surface.

Original language	English
Pages (from-to)	2028-2036
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	4
DOIs	https://doi.org/10.1021/jp4103405
Publication status	Published - 8 Jan 2014

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title = "Adsorption and photocatalytic degradation of 3-fluoroaniline on anatase tio2(101): A photoemission and near-edge x-ray absorption fine structure study",

abstract = "Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of 3-fluoroaniline on an anatase TiO2(101) single crystal. Photoemission results suggest that 3-fluoroaniline bonds through the amine group to a 5-fold coordinated surface Ti atom. Independently, 3-fluoroaniline also bonds to the surface via the fluorine atom; however, the carbon–fluorine bond undergoes fission to leave fluorine bound to the surface. Using the searchlight effect, the carbon K-edge NEXAFS spectra recorded for 3-fluoroaniline on anatase TiO2(101) shows the phenyl ring to be oriented at 90 ± 5° from the surface and twisted 10 ± 5° relative to the ⟨010⟩ direction. When 3-fluoroaniline bonded on anatase TiO2(101) is irradiated with UV light (4.8 eV), the molecule is almost completely desorbed from the surface.",

author = "Jackman, {Mark J.} and Thomas, {Andrew G.}",

year = "2014",

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doi = "10.1021/jp4103405",

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journal = "Journal of Physical Chemistry C",

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TY - JOUR

T1 - Adsorption and photocatalytic degradation of 3-fluoroaniline on anatase tio2(101): A photoemission and near-edge x-ray absorption fine structure study

AU - Jackman, Mark J.

AU - Thomas, Andrew G.

PY - 2014/1/8

Y1 - 2014/1/8

N2 - Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of 3-fluoroaniline on an anatase TiO2(101) single crystal. Photoemission results suggest that 3-fluoroaniline bonds through the amine group to a 5-fold coordinated surface Ti atom. Independently, 3-fluoroaniline also bonds to the surface via the fluorine atom; however, the carbon–fluorine bond undergoes fission to leave fluorine bound to the surface. Using the searchlight effect, the carbon K-edge NEXAFS spectra recorded for 3-fluoroaniline on anatase TiO2(101) shows the phenyl ring to be oriented at 90 ± 5° from the surface and twisted 10 ± 5° relative to the ⟨010⟩ direction. When 3-fluoroaniline bonded on anatase TiO2(101) is irradiated with UV light (4.8 eV), the molecule is almost completely desorbed from the surface.

AB - Synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) techniques have been used to study the adsorption of 3-fluoroaniline on an anatase TiO2(101) single crystal. Photoemission results suggest that 3-fluoroaniline bonds through the amine group to a 5-fold coordinated surface Ti atom. Independently, 3-fluoroaniline also bonds to the surface via the fluorine atom; however, the carbon–fluorine bond undergoes fission to leave fluorine bound to the surface. Using the searchlight effect, the carbon K-edge NEXAFS spectra recorded for 3-fluoroaniline on anatase TiO2(101) shows the phenyl ring to be oriented at 90 ± 5° from the surface and twisted 10 ± 5° relative to the ⟨010⟩ direction. When 3-fluoroaniline bonded on anatase TiO2(101) is irradiated with UV light (4.8 eV), the molecule is almost completely desorbed from the surface.

U2 - 10.1021/jp4103405

DO - 10.1021/jp4103405

M3 - Article

SN - 1932-7447

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SP - 2028

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 4

ER -

Adsorption and photocatalytic degradation of 3-fluoroaniline on anatase tio2(101): A photoemission and near-edge x-ray absorption fine structure study

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