Photodegradation of CH                         3                         I on mesoporous TiO                         2                         -B nanofibers with Au nanoparticles

Jr Sheng Li; Dong Lin Shieh; Dian Yi Li; Chia Hsun Ho; Shang Ju Yang; Jong Liang Lin

doi:10.1016/j.apsusc.2008.01.068

Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles

Jr Sheng Li, Dong Lin Shieh, Dian Yi Li, Chia Hsun Ho, Shang Ju Yang, Jong Liang Lin

Department of Chemistry

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

11 Citations (Scopus)

Abstract

Au nanoparticles deposited on mesoporous TiO ₂ -B nanofibers have been prepared, characterized, and used to catalyze photoreactions of iodomethane. High-density gold-particle deposition on TiO ₂ -B is obtained by electrostatic and/or chemical force between the particles of TiO ₂ -B and Au capped with -SC(H)(CO ₂ H)(CH ₂ CO ₂ H) through pH control. The capping groups on the gold particles can be removed after 400 °C calcination. It is found that the nature of the inorganic acids used for pH adjustment has effects on particle morphology and deposition. Two other methods, i.e., preparation of TiO ₂ -B nanofibers in the presence of gold particles and preparation of gold nanoparticles in the presence of TiO ₂ -B particles (deposition-precipitation method), are also investigated. However, the former method produces a low-density deposition and the latter one induces a morphology change of the TiO ₂ -B and an increase of the Au in size. Fourier transform infrared spectroscopy has been employed to study and to compare the photoreactions of CH ₃ I on TiO ₂ -B and Au/TiO ₂ -B and the effect of O ₂ . The presence of gold particles on TiO ₂ -B increases the efficiency of CH ₃ I photodegradation, forming adsorbed methoxy and formate. The role of gold is also discussed.

Original language	English
Pages (from-to)	4655-4664
Number of pages	10
Journal	Applied Surface Science
Volume	254
Issue number	15
DOIs	https://doi.org/10.1016/j.apsusc.2008.01.068
Publication status	Published - 2008 May 30

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

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Li, J. S., Shieh, D. L., Li, D. Y., Ho, C. H., Yang, S. J., & Lin, J. L. (2008). Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles Applied Surface Science, 254(15), 4655-4664. https://doi.org/10.1016/j.apsusc.2008.01.068

Li, Jr Sheng ; Shieh, Dong Lin ; Li, Dian Yi ; Ho, Chia Hsun ; Yang, Shang Ju ; Lin, Jong Liang. / Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles In: Applied Surface Science. 2008 ; Vol. 254, No. 15. pp. 4655-4664.

@article{65b76b9ce31347bdbd9b1d6a55c4aee2,

title = " Photodegradation of CH 3 I on mesoporous TiO 2 -B nanofibers with Au nanoparticles ",

abstract = " Au nanoparticles deposited on mesoporous TiO 2 -B nanofibers have been prepared, characterized, and used to catalyze photoreactions of iodomethane. High-density gold-particle deposition on TiO 2 -B is obtained by electrostatic and/or chemical force between the particles of TiO 2 -B and Au capped with -SC(H)(CO 2 H)(CH 2 CO 2 H) through pH control. The capping groups on the gold particles can be removed after 400 °C calcination. It is found that the nature of the inorganic acids used for pH adjustment has effects on particle morphology and deposition. Two other methods, i.e., preparation of TiO 2 -B nanofibers in the presence of gold particles and preparation of gold nanoparticles in the presence of TiO 2 -B particles (deposition-precipitation method), are also investigated. However, the former method produces a low-density deposition and the latter one induces a morphology change of the TiO 2 -B and an increase of the Au in size. Fourier transform infrared spectroscopy has been employed to study and to compare the photoreactions of CH 3 I on TiO 2 -B and Au/TiO 2 -B and the effect of O 2 . The presence of gold particles on TiO 2 -B increases the efficiency of CH 3 I photodegradation, forming adsorbed methoxy and formate. The role of gold is also discussed.",

author = "Li, {Jr Sheng} and Shieh, {Dong Lin} and Li, {Dian Yi} and Ho, {Chia Hsun} and Yang, {Shang Ju} and Lin, {Jong Liang}",

year = "2008",

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doi = "10.1016/j.apsusc.2008.01.068",

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Li, JS, Shieh, DL, Li, DY, Ho, CH, Yang, SJ & Lin, JL 2008, ' Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles ', Applied Surface Science, vol. 254, no. 15, pp. 4655-4664. https://doi.org/10.1016/j.apsusc.2008.01.068

Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles . / Li, Jr Sheng; Shieh, Dong Lin; Li, Dian Yi; Ho, Chia Hsun; Yang, Shang Ju; Lin, Jong Liang.

In: Applied Surface Science, Vol. 254, No. 15, 30.05.2008, p. 4655-4664.

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

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T1 - Photodegradation of CH 3 I on mesoporous TiO 2 -B nanofibers with Au nanoparticles

AU - Li, Jr Sheng

AU - Shieh, Dong Lin

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AU - Ho, Chia Hsun

AU - Yang, Shang Ju

AU - Lin, Jong Liang

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Y1 - 2008/5/30

N2 - Au nanoparticles deposited on mesoporous TiO 2 -B nanofibers have been prepared, characterized, and used to catalyze photoreactions of iodomethane. High-density gold-particle deposition on TiO 2 -B is obtained by electrostatic and/or chemical force between the particles of TiO 2 -B and Au capped with -SC(H)(CO 2 H)(CH 2 CO 2 H) through pH control. The capping groups on the gold particles can be removed after 400 °C calcination. It is found that the nature of the inorganic acids used for pH adjustment has effects on particle morphology and deposition. Two other methods, i.e., preparation of TiO 2 -B nanofibers in the presence of gold particles and preparation of gold nanoparticles in the presence of TiO 2 -B particles (deposition-precipitation method), are also investigated. However, the former method produces a low-density deposition and the latter one induces a morphology change of the TiO 2 -B and an increase of the Au in size. Fourier transform infrared spectroscopy has been employed to study and to compare the photoreactions of CH 3 I on TiO 2 -B and Au/TiO 2 -B and the effect of O 2 . The presence of gold particles on TiO 2 -B increases the efficiency of CH 3 I photodegradation, forming adsorbed methoxy and formate. The role of gold is also discussed.

AB - Au nanoparticles deposited on mesoporous TiO 2 -B nanofibers have been prepared, characterized, and used to catalyze photoreactions of iodomethane. High-density gold-particle deposition on TiO 2 -B is obtained by electrostatic and/or chemical force between the particles of TiO 2 -B and Au capped with -SC(H)(CO 2 H)(CH 2 CO 2 H) through pH control. The capping groups on the gold particles can be removed after 400 °C calcination. It is found that the nature of the inorganic acids used for pH adjustment has effects on particle morphology and deposition. Two other methods, i.e., preparation of TiO 2 -B nanofibers in the presence of gold particles and preparation of gold nanoparticles in the presence of TiO 2 -B particles (deposition-precipitation method), are also investigated. However, the former method produces a low-density deposition and the latter one induces a morphology change of the TiO 2 -B and an increase of the Au in size. Fourier transform infrared spectroscopy has been employed to study and to compare the photoreactions of CH 3 I on TiO 2 -B and Au/TiO 2 -B and the effect of O 2 . The presence of gold particles on TiO 2 -B increases the efficiency of CH 3 I photodegradation, forming adsorbed methoxy and formate. The role of gold is also discussed.

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Li JS, Shieh DL, Li DY, Ho CH, Yang SJ, Lin JL. Photodegradation of CH ₃ I on mesoporous TiO ₂ -B nanofibers with Au nanoparticles Applied Surface Science. 2008 May 30;254(15):4655-4664. https://doi.org/10.1016/j.apsusc.2008.01.068