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Preparation of Y2SiO5:Pr3+,Li and Na2NbxTa2-xO6/(Au/RGO) composite and investigation on visible-light driven photocatalytic hydrogen production

Abstract

A visible-light-driven photocatalytic hydrogen production system (Y2SiO5:Pr3+,Li/Na2NbxTa2-xO6 /(Au/RGO)), which is composed of up-conversion luminescence agent (Y2SiO5:Pr3+,Li), Nb(V)-substituted Na2Ta2O6 (Na2NbxTa2-xO6) and combined co-catalyst (Au/RGO), is designed and the photocatalytic hydrogen production activity is studied using methanol as sacrificial agent in aqueous solution. In employed composite nanoparticles, the Y2SiO5:Pr3+,Li/Na2Nb0.5Ta1.5O6/(Au/RGO) with 0.4:1.0 mass ratio of Y2SiO5:Pr3+,Li and Na2Nb0.5Ta1.5O6 gives the highest amount of hydrogen production under visible-light irradiation, which is 2.3 times higher than that of Na2Nb0.5Ta1.5O6/(Au/RGO). The high photocatalytic hydrogen production activity is attributed to spectrographic matching between Y2SiO5:Pr3+,Li and Na2Nb0.5Ta1.5O6/(Au/RGO). That is, the ultraviolet-light (230-320 nm) from up-conversion emission of Y2SiO5:Pr3+,Li can effectively activate Na2Nb0.5Ta1.5O6/(Au/RGO). The presence of Nb can adjust the band-gap of Na2Ta2O6 to broaden light respond range. In addition, Au/RGO can quickly separate the photo-generated electrons and holes and further enhance the photocatalytic hydrogen production activity.

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Publication details

The article was received on 12 Apr 2018, accepted on 05 Jun 2018 and first published on 06 Jun 2018


Article type: Paper
DOI: 10.1039/C8NJ01768A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Preparation of Y2SiO5:Pr3+,Li and Na2NbxTa2-xO6/(Au/RGO) composite and investigation on visible-light driven photocatalytic hydrogen production

    X. Liu, X. Zhang, C. Zhao, X. Shu, D. Fang, J. Wang and Y. T. Song, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01768A

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