FTIR study of interactions of ethyl iodide with powdered TiO2

Wu, Wen-Chun; Liao, Li-Fen; Shiu, Jau-Shiang; Lin, Jinru

doi:10.1039/b004087h

Cited by 23 publications

(37 citation statements)

References 30 publications

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“…The only reported value of 3026 cm Ϫ1 was observed for iodoethane adsorbed on TiO 2 surface at high pressures ͑up to 6 Torr͒. 44 By comparison of the spectra recorded after adsorption of iodoethane onto the Si͑100͒-2ϫ1 surface at room temperature with the spectra of multilayers of this compound condensed at cryogenic conditions and with the vibrational characteristics of similar ethyl-containing chemisorbed species, the intactness of the ethyl entities on the Si͑100͒-2ϫ1 surface in our experiments is confirmed. The absence of any Si-H absorption bands at room temperature suggests that all the surface ethyl groups deposited by iodoethane dissociation on Si͑100͒-2ϫ1 are intact.…”

Section: A Vibrational Characterization Of Iodoethane Adsorbed On Thsupporting

confidence: 75%

Infrared spectroscopy studies of iodoethane on Si(100)-2×1: Adsorption and thermal decomposition leading to adsorbate ordering

Bulanin

Shah

Teplyakov

2001

The Journal of Chemical Physics

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Articles you may be interested inInfrared spectroscopy study of adsorption and photodecomposition of formic acid on reduced and defective rutile TiO2 (110) surfaces J. Vac. Sci. Technol. A 32, 061402 (2014); 10.1116/1.4898568Thermal decomposition of CH3CHO studied by matrix infrared spectroscopy and photoionization mass spectroscopyThe adsorption and chemical transformation of iodoethane were studied on a Si(100)-2ϫ1 surface using multiple-internal reflection Fourier-transform infrared spectroscopy ͑MIR-FTIR͒. The C-H and Si-H stretch vibrations served as fingerprints of all surface transformations. Although ethyl groups are stable on the Si(100)-2ϫ1 surface at room temperature, thermal annealing studies suggest the reaction-limited formation of ethylene, a major hydrocarbon reaction product, accompanied by the loss of hydrogen, which is left on the surface until the temperature of recombinative H 2 desorption is reached. Variable temperature studies indicate that ethyl groups are the only hydrocarbon entities on a surface up until the hydrogen elimination temperature. The positions of Si-H stretching bands suggest that a mixture of surface sites is formed at temperatures between 300 K and 600 K. However, the majority of surface hydrogen forms SiH-SiI surface species as the surface temperature reaches 700 K.

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Section: A Vibrational Characterization Of Iodoethane Adsorbed On Thsupporting

confidence: 75%

Infrared spectroscopy studies of iodoethane on Si(100)-2×1: Adsorption and thermal decomposition leading to adsorbate ordering

Bulanin

Shah

Teplyakov

2001

The Journal of Chemical Physics

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“…Among these absorptions the bands at 1663-1638 cm À1 (n (C O)), at 1596-1586 cm À1 (n (C C)), at 1260-1280 cm À1 (d (C-H)), at 1173-1160 cm À1 (n (CC), r (CH 3 )) and at 936-981 cm À1 r (CH 3 ) can be attributed to adsorbed crotonaldehyde (II) (CH 3 CH CHCHO) [8,[13][14][15], which is produced by b-aldolization occurring between two acetaldehyde molecules on the surface [8,12].…”

Section: Resultsmentioning

confidence: 99%

“…The band at 1546-1542 cm À1 (n as (COO)) appeared on oxidized TiO 2 and CeO 2 may be due to surface acetate (III) (CH 3 COO (a) ) [8,13,14,16], which is the result of acetaldehyde oxidation on surface oxygen (S-O) sites [17].…”

Section: Resultsmentioning

confidence: 99%

Adsorption and surface reactions of acetaldehyde on TiO2, CeO2 and Al2O3

Raskó

Kiss

2005

Applied Catalysis A: General

130

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“…Namely, that both brominated and nonbrominated intermediates were observed, and the preference for reductive degradation decreased in the series CBr 4 to CHBr 3 to CH 2 Br 2 . Gas phase O 2 was shown to be essential in the photodecomposition reactions of CH 2 I 2 and C 2 H 5 I over TiO 2 , with various oxygenates detected by FTIR [1017,1018].…”

Section: Fluoro- Bromo-and Iodo-hydrocarbonsmentioning

confidence: 98%

A surface science perspective on TiO2 photocatalysis

Henderson

2011

Surface Science Reports

1,872

1,634

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a b s t r a c tThe field of surface science provides a unique approach to understanding bulk, surface and interfacial phenomena occurring during TiO 2 photocatalysis. This review highlights, from a surface science perspective, recent literature that provides molecular-level insights into photon-initiated events occurring at TiO 2 surfaces. Seven key scientific issues are identified in the organization of this review. These are: (1) photon absorption, (2) charge transport and trapping, (3) electron transfer dynamics, (4) the adsorbed state, (5) mechanisms, (6) poisons and promoters, and (7) phase and form. This review ends with a brief examination of several chemical processes (such as water splitting) in which TiO 2 photocatalysis has made significant contributions in the literature.

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FTIR study of interactions of ethyl iodide with powdered TiO2

Cited by 23 publications

References 30 publications

Infrared spectroscopy studies of iodoethane on Si(100)-2×1: Adsorption and thermal decomposition leading to adsorbate ordering

Infrared spectroscopy studies of iodoethane on Si(100)-2×1: Adsorption and thermal decomposition leading to adsorbate ordering

Adsorption and surface reactions of acetaldehyde on TiO2, CeO2 and Al2O3

A surface science perspective on TiO2 photocatalysis

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