Synthesis, characterization, optoelectronic and photocatalytic properties of Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with varying SrCO3 content

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Synthesis, characterization, optoelectronic and photocatalytic properties of Sr₂Bi₂O₅/SrCO₃ and Sr₃Bi₂O₆/SrCO₃ heterostructures with varying SrCO₃ content. / Shtarev, Dmitry S.; Shtareva, Anna V.; Kevorkyants, Ruslan; Syuy, Alexander V.

In: Chemosphere, Vol. 267, 129229, 01.03.2021.

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

BibTeX

@article{cd0d3747ece34eceaa38ec7036d68e33,

title = "Synthesis, characterization, optoelectronic and photocatalytic properties of Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with varying SrCO3 content",

abstract = "We report on the structure and properties of novel Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with SrCO3 content varying from 10 wt% to 90 wt%. Formation of the heterostructures is succeeded via sintering technique and according to XRD, SEM, and EDX studies has resulted in highly crystalline materials with well-defined carbonate-bismuthate interfaces. In the reaction of photodegradation of phenol in aqueous solution the heterostructures demonstrated photocatalytic activity exceeding that of TiO2. It is demonstrated that their photocatalytic action is due to the presence of type II semiconductor heterojunctions. The content of SrCO3 ensuring utmost photocatalytic activity is explained based on numerical modeling of the heterostructures{\textquoteright} formation using {\textquoteleft}Unity{\textquoteright} development platform. In addition, the heterostructures show photoluminescence. Its mechanism proposed here implies permeability of the materials{\textquoteright} heterojunctions to electrons. This work describes new materials that can be used for photodegradation of organic pollutants. Besides, it extends available principles of design of photocatalytically active heterostructures.",

keywords = "DFT calculations, Heterostructures, Luminescence, Visible light photocatalysts, Phenol, Photolysis, Catalysis, OXIDE, DECOMPOSITION, DRIVEN, PSEUDOPOTENTIALS, LA, CALCIUM, NIO/SRBI2O4",

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

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = mar,

day = "1",

doi = "10.1016/j.chemosphere.2020.129229",

language = "English",

volume = "267",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Synthesis, characterization, optoelectronic and photocatalytic properties of Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with varying SrCO3 content

AU - Shtarev, Dmitry S.

AU - Shtareva, Anna V.

AU - Kevorkyants, Ruslan

AU - Syuy, Alexander V.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - We report on the structure and properties of novel Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with SrCO3 content varying from 10 wt% to 90 wt%. Formation of the heterostructures is succeeded via sintering technique and according to XRD, SEM, and EDX studies has resulted in highly crystalline materials with well-defined carbonate-bismuthate interfaces. In the reaction of photodegradation of phenol in aqueous solution the heterostructures demonstrated photocatalytic activity exceeding that of TiO2. It is demonstrated that their photocatalytic action is due to the presence of type II semiconductor heterojunctions. The content of SrCO3 ensuring utmost photocatalytic activity is explained based on numerical modeling of the heterostructures’ formation using ‘Unity’ development platform. In addition, the heterostructures show photoluminescence. Its mechanism proposed here implies permeability of the materials’ heterojunctions to electrons. This work describes new materials that can be used for photodegradation of organic pollutants. Besides, it extends available principles of design of photocatalytically active heterostructures.

AB - We report on the structure and properties of novel Sr2Bi2O5/SrCO3 and Sr3Bi2O6/SrCO3 heterostructures with SrCO3 content varying from 10 wt% to 90 wt%. Formation of the heterostructures is succeeded via sintering technique and according to XRD, SEM, and EDX studies has resulted in highly crystalline materials with well-defined carbonate-bismuthate interfaces. In the reaction of photodegradation of phenol in aqueous solution the heterostructures demonstrated photocatalytic activity exceeding that of TiO2. It is demonstrated that their photocatalytic action is due to the presence of type II semiconductor heterojunctions. The content of SrCO3 ensuring utmost photocatalytic activity is explained based on numerical modeling of the heterostructures’ formation using ‘Unity’ development platform. In addition, the heterostructures show photoluminescence. Its mechanism proposed here implies permeability of the materials’ heterojunctions to electrons. This work describes new materials that can be used for photodegradation of organic pollutants. Besides, it extends available principles of design of photocatalytically active heterostructures.

KW - DFT calculations

KW - Heterostructures

KW - Luminescence

KW - Visible light photocatalysts

KW - Phenol

KW - Photolysis

KW - Catalysis

KW - OXIDE

KW - DECOMPOSITION

KW - DRIVEN

KW - PSEUDOPOTENTIALS

KW - LA

KW - CALCIUM

KW - NIO/SRBI2O4

UR - http://www.scopus.com/inward/record.url?scp=85097672431&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/2c81538b-d039-3bbc-a443-7a0bb52dbf88/

U2 - 10.1016/j.chemosphere.2020.129229

DO - 10.1016/j.chemosphere.2020.129229

M3 - Article

C2 - 33333382

AN - SCOPUS:85097672431

VL - 267

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

M1 - 129229

ER -

ID: 87323817