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

doi:10.1021/acsaem.9b01730

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 journal › Article › peer-review

29 Scopus citations

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 language	English (US)
Pages (from-to)	8274-8282
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	2
Issue number	11
DOIs	https://doi.org/10.1021/acsaem.9b01730
State	Published - Nov 25 2019

All Science Journal Classification (ASJC) codes

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

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10.1021/acsaem.9b01730

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title = "Ag−TiO2 Hybrid Nanocrystal Photocatalyst: Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation",

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).",

author = "Varapragasam, {Shelton J.P.} and Shahzahan Mia and Carly Wieting and Choumini Balasanthiran and Hossan, {Md Yeathad} and Aravind Baride and Rioux, {Robert M.} and Hoefelmeyer, {James D.}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = nov,

day = "25",

doi = "10.1021/acsaem.9b01730",

language = "English (US)",

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journal = "ACS Applied Energy Materials",

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TY - JOUR

T1 - Ag−TiO2 Hybrid Nanocrystal Photocatalyst

T2 - Hydrogen Evolution under UV Irradiation but Not under Visible-Light Irradiation

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.

PY - 2019/11/25

Y1 - 2019/11/25

N2 - 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).

AB - 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).

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U2 - 10.1021/acsaem.9b01730

DO - 10.1021/acsaem.9b01730

M3 - Article

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SN - 2574-0962

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SP - 8274

EP - 8282

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 11

ER -

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

Abstract

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