Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi26- xMgxO40

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Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi_{26- x}Mg_xO₄₀. / Shtarev, Dmitry S.; Kevorkyants, Ruslan; Molokeev, Maxim S.; Molokeev, Maxim S.; Molokeev, Maxim S.; Shtareva, Anna V.

In: Inorganic Chemistry, Vol. 59, No. 12, 15.06.2020, p. 8173-8183.

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

Author

Shtarev, Dmitry S. ; Kevorkyants, Ruslan ; Molokeev, Maxim S. ; Molokeev, Maxim S. ; Molokeev, Maxim S. ; Shtareva, Anna V. / Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi_{26- x}Mg_xO₄₀. In: Inorganic Chemistry. 2020 ; Vol. 59, No. 12. pp. 8173-8183.

BibTeX

@article{3eceb93f338e4a319caa8c515825d91b,

title = "Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi26- xMgxO40",

abstract = "We report the synthesis and the crystal and electronic structure as well as the optical and photocatalytic properties of novel photoactive materials of the general formula Bi26-xMgxO40. Two compounds with compositions of Bi24.28(3)Mg1.72(3)O40 and Bi24.05(3)Mg1.95(3)O40 are synthesized using the pyrolytic method. According to X-ray diffraction analysis, the materials are monocrystalline species. Their electronic bandgaps determined from Tauc plots are 2.41 eV [Bi24.28(3)Mg1.72(3)O40] and 2.69 eV [Bi24.05(3)Mg1.95(3)O40]. Keeping in mind that optical bandgaps are typically larger than their electronic counterparts, we find that the bismuthate bandgaps match well that of Bi24Mg2O40 (2.26 eV) predicted by density functional theory. Apparently, the synthesized bismuthates are indirect bandgap semiconductors just like Bi24Mg2O40. Both materials demonstrate nearly identical luminescence spectra. Their luminescence emission at 620 nm is most efficiently excited by 365 nm light. The materials' photocatalytic properties are evaluated in a visible light-induced photocatalytic phenol degradation reaction. Rather low activity of both compounds is detected. However, Bi24.05(3)Mg1.95(3)O40 is ∼2 times more photocatalytically active than Bi24.28(3)Mg1.72(3)O40, which is associated with a higher Bi5+ content in the former.",

keywords = "DECOMPOSITION, NIO/SRBI2O4, CABI6O10, DRIVEN",

author = "Shtarev, {Dmitry S.} and Ruslan Kevorkyants and Molokeev, {Maxim S.} and Molokeev, {Maxim S.} and Molokeev, {Maxim S.} and Shtareva, {Anna V.}",

note = "Funding Information: This study was supported by a grant from the Russian Science Foundation (Project N o 19-73-10013). The authors acknowledge the help of the Yu. A. Kosygin Institute of Tectonics and Geophysics FEB RAS in conducting the study and offering their research equipment. The authors also thank the Research Center on Nanophotonics, the Center for Physical Methods of Surface Investigation (Dr. Alexandra Koroleva), and the Computing Centre of the Saint-Petersburg State University. R.K. acknowledges financial support from a grant from the Saint-Petersburg State University (Pure ID 39054581). Publisher Copyright: {\textcopyright} 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = jun,

day = "15",

doi = "10.1021/acs.inorgchem.0c00486",

language = "English",

volume = "59",

pages = "8173--8183",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "12",

}

RIS

TY - JOUR

T1 - Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi26- xMgxO40

AU - Shtarev, Dmitry S.

AU - Kevorkyants, Ruslan

AU - Molokeev, Maxim S.

AU - Shtareva, Anna V.

N1 - Funding Information: This study was supported by a grant from the Russian Science Foundation (Project N o 19-73-10013). The authors acknowledge the help of the Yu. A. Kosygin Institute of Tectonics and Geophysics FEB RAS in conducting the study and offering their research equipment. The authors also thank the Research Center on Nanophotonics, the Center for Physical Methods of Surface Investigation (Dr. Alexandra Koroleva), and the Computing Centre of the Saint-Petersburg State University. R.K. acknowledges financial support from a grant from the Saint-Petersburg State University (Pure ID 39054581). Publisher Copyright: © 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/6/15

Y1 - 2020/6/15

N2 - We report the synthesis and the crystal and electronic structure as well as the optical and photocatalytic properties of novel photoactive materials of the general formula Bi26-xMgxO40. Two compounds with compositions of Bi24.28(3)Mg1.72(3)O40 and Bi24.05(3)Mg1.95(3)O40 are synthesized using the pyrolytic method. According to X-ray diffraction analysis, the materials are monocrystalline species. Their electronic bandgaps determined from Tauc plots are 2.41 eV [Bi24.28(3)Mg1.72(3)O40] and 2.69 eV [Bi24.05(3)Mg1.95(3)O40]. Keeping in mind that optical bandgaps are typically larger than their electronic counterparts, we find that the bismuthate bandgaps match well that of Bi24Mg2O40 (2.26 eV) predicted by density functional theory. Apparently, the synthesized bismuthates are indirect bandgap semiconductors just like Bi24Mg2O40. Both materials demonstrate nearly identical luminescence spectra. Their luminescence emission at 620 nm is most efficiently excited by 365 nm light. The materials' photocatalytic properties are evaluated in a visible light-induced photocatalytic phenol degradation reaction. Rather low activity of both compounds is detected. However, Bi24.05(3)Mg1.95(3)O40 is ∼2 times more photocatalytically active than Bi24.28(3)Mg1.72(3)O40, which is associated with a higher Bi5+ content in the former.

AB - We report the synthesis and the crystal and electronic structure as well as the optical and photocatalytic properties of novel photoactive materials of the general formula Bi26-xMgxO40. Two compounds with compositions of Bi24.28(3)Mg1.72(3)O40 and Bi24.05(3)Mg1.95(3)O40 are synthesized using the pyrolytic method. According to X-ray diffraction analysis, the materials are monocrystalline species. Their electronic bandgaps determined from Tauc plots are 2.41 eV [Bi24.28(3)Mg1.72(3)O40] and 2.69 eV [Bi24.05(3)Mg1.95(3)O40]. Keeping in mind that optical bandgaps are typically larger than their electronic counterparts, we find that the bismuthate bandgaps match well that of Bi24Mg2O40 (2.26 eV) predicted by density functional theory. Apparently, the synthesized bismuthates are indirect bandgap semiconductors just like Bi24Mg2O40. Both materials demonstrate nearly identical luminescence spectra. Their luminescence emission at 620 nm is most efficiently excited by 365 nm light. The materials' photocatalytic properties are evaluated in a visible light-induced photocatalytic phenol degradation reaction. Rather low activity of both compounds is detected. However, Bi24.05(3)Mg1.95(3)O40 is ∼2 times more photocatalytically active than Bi24.28(3)Mg1.72(3)O40, which is associated with a higher Bi5+ content in the former.

KW - DECOMPOSITION

KW - NIO/SRBI2O4

KW - CABI6O10

KW - DRIVEN

UR - http://www.scopus.com/inward/record.url?scp=85085769819&partnerID=8YFLogxK

U2 - 10.1021/acs.inorgchem.0c00486

DO - 10.1021/acs.inorgchem.0c00486

M3 - Article

C2 - 32437605

AN - SCOPUS:85085769819

VL - 59

SP - 8173

EP - 8183

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 12

ER -

ID: 69993345