Visible-light-active g-C 3 N 4 /N-doped Sr 2 Nb 2 O 7 heterojunctions as photocatalysts for the hydrogen evolution reaction

Adhikari, Shiba P.; Hood, Zachary D.; Chen, Vincent W.; More, Karren L.; Senevirathne, Keerthi; Lachgar, Abdou

doi:10.1039/C8SE00319J

Title: Visible-light-active g-C ₃ N ₄ /N-doped Sr ₂ Nb ₂ O ₇ heterojunctions as photocatalysts for the hydrogen evolution reaction

Journal Article · Wed Aug 29 00:00:00 EDT 2018 · Sustainable Energy & Fuels

DOI:https://doi.org/10.1039/C8SE00319J· OSTI ID:1468006

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^[2]; Chen, Vincent W. ^[3]; More, Karren L. ^[4];

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Department of Chemistry; Wake Forest University; Winston-Salem; USA; Center for Energy
School of Chemistry and Biochemistry; Georgia Institute of Technology; Atlanta; USA; Center for Nanophase Materials Sciences
School of Chemistry and Biochemistry; Georgia Institute of Technology; Atlanta; USA
Center for Nanophase Materials Sciences; Oak Ridge National Laboratory; Oak Ridge; USA
Department of Chemistry; Florida Agricultural and Mechanical University; Tallahassee; USA

Here, different visible-light-active g-C₃N₄/nitrogen-doped Sr₂Nb₂O₇ heterojunction photocatalysts were fabricated by deposition of graphitic carbon nitride over N-doped strontium pyro-niobate prepared by ammonolysis at different temperatures of solvothermally synthesized Sr₂Nb₂O₇ nanorods. Their photocatalytic performance was determined by the amount of hydrogen generated from water reduction under visible light irradiation. The best performing heterojunction was found to be the one formed by g-C₃N₄ and N-doped Sr₂Nb₂O₇ obtained at 700°C. The enhanced activity of the heterojunction can be explained by better charge separation due to proper bands alignment and intimate contact between the heterojunction components as revealed by electron microscopy. A mechanism for the observed enhanced photocatalytic activity is proposed and supported by band position calculations and photoluminescence data.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725; MRI 1040264; DGE-1650044

OSTI ID:: 1468006

Alternate ID(s):: OSTI ID: 1471828

Journal Information:: Sustainable Energy & Fuels, Vol. 2, Issue 11; ISSN 2398-4902

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 40 works

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Recent developments in carbon nitride based films for photoelectrochemical water splitting Xiong, Wei; Huang, Fei; Zhang, Rui-Qin Sustainable Energy & Fuels, Vol. 4, Issue 2 https://doi.org/10.1039/c9se00785g	journal	January 2020
Enhanced photoelectrochemical water-splitting performance of SrNbO ₂ N photoanodes using flux-assisted synthesis method and surface defect management Yang, Yingchen; Lou, Zirui; Lei, Weisheng Sustainable Energy & Fuels, Vol. 4, Issue 4 https://doi.org/10.1039/c9se01056d	journal	January 2020

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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