When C3N4 meets BaTiO3: Ferroelectric polarization plays a critical role in building a better photocatalyst

Bian Yang; Chao Wu; Jianwei Wang; Jihong Bian; Lei Wang; Ming Liu; Yaping Du; Yaodong Yang

doi:10.1016/j.ceramint.2019.10.145

When C₃N₄ meets BaTiO₃: Ferroelectric polarization plays a critical role in building a better photocatalyst

Bian Yang
, Chao Wu
, Jianwei Wang
, Jihong Bian
, Lei Wang
, Ming Liu
, Yaping Du
, Yaodong Yang

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

48 Scopus citations

Abstract

Photogenerated electrons (e⁻) and holes (h⁺) easily undergo fast recombination in many semiconductors, limiting the further improvement of its photocatalytic efficiency. To solve this bottleneck problem, graphitic C₃N₄ was used to group tetragonal-phase BaTiO₃ ferroelectric and successfully constructed the g-C₃N₄/BaTiO₃ heterojunction via a facial mixing-calcination method. These composites exhibited an extraordinary improvement under visible-light irradiation, achieving a “1 + 1>2” performance compared with their single pristine components. It is because the formation of double-transfer structure promotes the fast transfer of photo-induced charge carriers in g-C₃N₄/BaTiO₃ composites. Synergy between the two materials, especially the ferroelectric polarization, plays a key role in facilitating the spatial separation of photo-excited e⁻/h⁺ pairs and improving the photocatalytic efficiency.

Original language	English
Pages (from-to)	4248-4255
Number of pages	8
Journal	Ceramics International
Volume	46
Issue number	4
DOIs	https://doi.org/10.1016/j.ceramint.2019.10.145
State	Published - Mar 2020

Keywords

Ferroelectric polarization
Graphitic CN
Photocatalysis
Synergistic effects

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10.1016/j.ceramint.2019.10.145

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title = "When C3N4 meets BaTiO3: Ferroelectric polarization plays a critical role in building a better photocatalyst",

abstract = "Photogenerated electrons (e−) and holes (h+) easily undergo fast recombination in many semiconductors, limiting the further improvement of its photocatalytic efficiency. To solve this bottleneck problem, graphitic C3N4 was used to group tetragonal-phase BaTiO3 ferroelectric and successfully constructed the g-C3N4/BaTiO3 heterojunction via a facial mixing-calcination method. These composites exhibited an extraordinary improvement under visible-light irradiation, achieving a “1 + 1>2” performance compared with their single pristine components. It is because the formation of double-transfer structure promotes the fast transfer of photo-induced charge carriers in g-C3N4/BaTiO3 composites. Synergy between the two materials, especially the ferroelectric polarization, plays a key role in facilitating the spatial separation of photo-excited e−/h+ pairs and improving the photocatalytic efficiency.",

keywords = "Ferroelectric polarization, Graphitic CN, Photocatalysis, Synergistic effects",

author = "Bian Yang and Chao Wu and Jianwei Wang and Jihong Bian and Lei Wang and Ming Liu and Yaping Du and Yaodong Yang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd and Techna Group S.r.l.",

year = "2020",

month = mar,

doi = "10.1016/j.ceramint.2019.10.145",

language = "英语",

volume = "46",

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journal = "Ceramics International",

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TY - JOUR

T1 - When C3N4 meets BaTiO3

T2 - Ferroelectric polarization plays a critical role in building a better photocatalyst

AU - Yang, Bian

AU - Wu, Chao

AU - Wang, Jianwei

AU - Bian, Jihong

AU - Wang, Lei

AU - Liu, Ming

AU - Du, Yaping

AU - Yang, Yaodong

PY - 2020/3

Y1 - 2020/3

N2 - Photogenerated electrons (e−) and holes (h+) easily undergo fast recombination in many semiconductors, limiting the further improvement of its photocatalytic efficiency. To solve this bottleneck problem, graphitic C3N4 was used to group tetragonal-phase BaTiO3 ferroelectric and successfully constructed the g-C3N4/BaTiO3 heterojunction via a facial mixing-calcination method. These composites exhibited an extraordinary improvement under visible-light irradiation, achieving a “1 + 1>2” performance compared with their single pristine components. It is because the formation of double-transfer structure promotes the fast transfer of photo-induced charge carriers in g-C3N4/BaTiO3 composites. Synergy between the two materials, especially the ferroelectric polarization, plays a key role in facilitating the spatial separation of photo-excited e−/h+ pairs and improving the photocatalytic efficiency.

AB - Photogenerated electrons (e−) and holes (h+) easily undergo fast recombination in many semiconductors, limiting the further improvement of its photocatalytic efficiency. To solve this bottleneck problem, graphitic C3N4 was used to group tetragonal-phase BaTiO3 ferroelectric and successfully constructed the g-C3N4/BaTiO3 heterojunction via a facial mixing-calcination method. These composites exhibited an extraordinary improvement under visible-light irradiation, achieving a “1 + 1>2” performance compared with their single pristine components. It is because the formation of double-transfer structure promotes the fast transfer of photo-induced charge carriers in g-C3N4/BaTiO3 composites. Synergy between the two materials, especially the ferroelectric polarization, plays a key role in facilitating the spatial separation of photo-excited e−/h+ pairs and improving the photocatalytic efficiency.

KW - Ferroelectric polarization

KW - Graphitic CN

KW - Photocatalysis

KW - Synergistic effects

UR - https://www.scopus.com/pages/publications/85074443999

U2 - 10.1016/j.ceramint.2019.10.145

DO - 10.1016/j.ceramint.2019.10.145

M3 - 文章

AN - SCOPUS:85074443999

SN - 0272-8842

VL - 46

SP - 4248

EP - 4255

JO - Ceramics International

JF - Ceramics International

IS - 4

ER -

When C₃N₄ meets BaTiO₃: Ferroelectric polarization plays a critical role in building a better photocatalyst

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Keywords

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