Ag-TiO2 Hybrid Nanocrystal Photocatalyst: Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation

Shelton J.P. Varapragasam, Shahzahan Mia, Carly Wieting, Choumini Balasanthiran, Md Yeathad Hossan, Aravind Baride, Robert M. Rioux, James D. Hoefelmeyer

Research output: Contribution to journalArticle

Abstract

We report a thermolytic reduction of silver precursors in the presence of anatase TiO2 nanorods to form Ag-TiO2 hybrid nanocrystals (HNCs). Upon changing the reaction conditions, the size and number density of Ag on the HNCs could be adjusted. The size and number density of Ag on the HNCs were found to have an inverse relation. We assess the hydrogen evolution of TiO2 nanorods, P25 TiO2, and Ag-TiO2 HNCs in methanol/water under xenon lamp irradiation. The turnover frequency for hydrogen evolution on silica-supported Ag-TiO2 was 1.4 × 10-4 s-1, greater than that of the anatase TiO2 nanorods (9.8 × 10-6 s-1) or the coupled anatase/rutile TiO2 (P25 catalyst; 5.2 × 10-5 s-1).

Original languageEnglish (US)
JournalACS Applied Energy Materials
DOIs
StateAccepted/In press - Jan 1 2019

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Photocatalysts
Nanocrystals
Hydrogen
Nanorods
Irradiation
Titanium dioxide
Xenon
Electric lamps
Silver
Silicon Dioxide
Methanol
Silica
Catalysts
titanium dioxide
Water

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Varapragasam, S. J. P., Mia, S., Wieting, C., Balasanthiran, C., Hossan, M. Y., Baride, A., ... Hoefelmeyer, J. D. (Accepted/In press). Ag-TiO2 Hybrid Nanocrystal Photocatalyst: Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation. ACS Applied Energy Materials. https://doi.org/10.1021/acsaem.9b01730
Varapragasam, Shelton J.P. ; Mia, Shahzahan ; Wieting, Carly ; Balasanthiran, Choumini ; Hossan, Md Yeathad ; Baride, Aravind ; Rioux, Robert M. ; Hoefelmeyer, James D. / Ag-TiO2 Hybrid Nanocrystal Photocatalyst : Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation. In: ACS Applied Energy Materials. 2019.
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Ag-TiO2 Hybrid Nanocrystal Photocatalyst : Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation. / Varapragasam, Shelton J.P.; Mia, Shahzahan; Wieting, Carly; Balasanthiran, Choumini; Hossan, Md Yeathad; Baride, Aravind; Rioux, Robert M.; Hoefelmeyer, James D.

In: ACS Applied Energy Materials, 01.01.2019.

Research output: Contribution to journalArticle

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AU - Varapragasam, Shelton J.P.

AU - Mia, Shahzahan

AU - Wieting, Carly

AU - Balasanthiran, Choumini

AU - Hossan, Md Yeathad

AU - Baride, Aravind

AU - Rioux, Robert M.

AU - Hoefelmeyer, James D.

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