The adsorption, thermal desorption and photochemistry of methyl iodide on an Ag-covered TiO2(110) surface

Chaochin Su; Chih Chieng Chen; Chih Song Tsai; Jong Liang Lin; Jiing Chyuan Lin

doi:10.1002/jccs.200600106

The adsorption, thermal desorption and photochemistry of methyl iodide on an Ag-covered TiO₂(110) surface

Chaochin Su, Chih Chieng Chen, Chih Song Tsai, Jong Liang Lin, Jiing Chyuan Lin

Department of Chemistry

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2 Citations (Scopus)

Abstract

The thermal reactions and photochemistry of monolayer methyl iodide (CH₃I) on a silver covered TiO₂(110) surface have been studied using combinative techniques of temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). About ∼60% of CH₃I at monolayer coverage on Ag/TiO₂(110) dissociates between 130 and 200 K yield adsorbed CH₃ and I, with the rest desorbing molecularly at a peak temperature of 200 K in a TPD study. Photochemistry of CH₃I on Ag/TiO₂(110) is wavelength dependent. Irradiation of monolayer CH₃I by 404 nm photon causes C-I bond dissociation and CH₃ desorption. Upon 290 nm, UV irradiation, the depletion of CH₃I _(a) is dominated by photodesorption of molecular CH₃I.

Original language	English
Pages (from-to)	803-813
Number of pages	11
Journal	Journal of the Chinese Chemical Society
Volume	53
Issue number	4
DOIs	https://doi.org/10.1002/jccs.200600106
Publication status	Published - 2006 Aug

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1002/jccs.200600106

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title = "The adsorption, thermal desorption and photochemistry of methyl iodide on an Ag-covered TiO2(110) surface",

abstract = "The thermal reactions and photochemistry of monolayer methyl iodide (CH3I) on a silver covered TiO2(110) surface have been studied using combinative techniques of temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). About ∼60% of CH3I at monolayer coverage on Ag/TiO2(110) dissociates between 130 and 200 K yield adsorbed CH3 and I, with the rest desorbing molecularly at a peak temperature of 200 K in a TPD study. Photochemistry of CH3I on Ag/TiO2(110) is wavelength dependent. Irradiation of monolayer CH3I by 404 nm photon causes C-I bond dissociation and CH3 desorption. Upon 290 nm, UV irradiation, the depletion of CH3I (a) is dominated by photodesorption of molecular CH3I.",

author = "Chaochin Su and Chen, {Chih Chieng} and Tsai, {Chih Song} and Lin, {Jong Liang} and Lin, {Jiing Chyuan}",

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T1 - The adsorption, thermal desorption and photochemistry of methyl iodide on an Ag-covered TiO2(110) surface

AU - Su, Chaochin

AU - Chen, Chih Chieng

AU - Tsai, Chih Song

AU - Lin, Jong Liang

AU - Lin, Jiing Chyuan

PY - 2006/8

Y1 - 2006/8

N2 - The thermal reactions and photochemistry of monolayer methyl iodide (CH3I) on a silver covered TiO2(110) surface have been studied using combinative techniques of temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). About ∼60% of CH3I at monolayer coverage on Ag/TiO2(110) dissociates between 130 and 200 K yield adsorbed CH3 and I, with the rest desorbing molecularly at a peak temperature of 200 K in a TPD study. Photochemistry of CH3I on Ag/TiO2(110) is wavelength dependent. Irradiation of monolayer CH3I by 404 nm photon causes C-I bond dissociation and CH3 desorption. Upon 290 nm, UV irradiation, the depletion of CH3I (a) is dominated by photodesorption of molecular CH3I.

AB - The thermal reactions and photochemistry of monolayer methyl iodide (CH3I) on a silver covered TiO2(110) surface have been studied using combinative techniques of temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). About ∼60% of CH3I at monolayer coverage on Ag/TiO2(110) dissociates between 130 and 200 K yield adsorbed CH3 and I, with the rest desorbing molecularly at a peak temperature of 200 K in a TPD study. Photochemistry of CH3I on Ag/TiO2(110) is wavelength dependent. Irradiation of monolayer CH3I by 404 nm photon causes C-I bond dissociation and CH3 desorption. Upon 290 nm, UV irradiation, the depletion of CH3I (a) is dominated by photodesorption of molecular CH3I.

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The adsorption, thermal desorption and photochemistry of methyl iodide on an Ag-covered TiO₂(110) surface

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