Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La2Ti2O7 and La-doped Bi4Ti3O12 to improve the NO gas removal avoiding NO2 product

Li Lv; Lin Lei; Qi Wen Chen; Cheng Li Yin; Huiqing Fan; Jian Ping Zhou

doi:10.1016/j.apcatb.2023.123464

Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La₂Ti₂O₇ and La-doped Bi₄Ti₃O₁₂ to improve the NO gas removal avoiding NO₂ product

Li Lv, Lin Lei, Qi Wen Chen, Cheng Li Yin, Huiqing Fan, Jian Ping Zhou

School of Materials Sience and Engineering

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

49 Scopus citations

Abstract

Monoclinic phase La₂Ti₂O₇ and orthorhombic phase Bi₄Ti₃O₁₂ with layered crystal structure constructed by the perovskite slab were widely used in photocatalysis. Their electronic structures are the most crucial factor in high photocatalytic activity. Bi-doped La₂Ti₂O₇ gradually converts to La-doped Bi₄Ti₃O₁₂ with the incorporation of bismuth ions, and the two phases build an S-scheme heterojunction. More oxygen vacancies were introduced into the S-scheme heterojunction after heat treatment in a nitrogen atmosphere. The 0.1BTO/LTO-OV sample exhibits the largest NO removal efficiency of 52% and only 5.6 ppb NO₂ intermediate generation. The improved NO removal efficiency was ascribed to the synergistic effect of oxygen vacancies, doping and heterojunction, providing a new insight into the photocatalytic NO removal. The photocatalytic mechanism was eventually proposed on the basis of trapping experiments.

Original language	English
Article number	123464
Journal	Applied Catalysis B: Environmental
Volume	343
DOIs	https://doi.org/10.1016/j.apcatb.2023.123464
State	Published - Apr 2024

Keywords

Doping
Heterojunction
NO removal
Oxygen vacancy
Photocatalysis

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@article{e679ed42af324177abc0ed2fdc31223c,

title = "Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La2Ti2O7 and La-doped Bi4Ti3O12 to improve the NO gas removal avoiding NO2 product",

abstract = "Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 with layered crystal structure constructed by the perovskite slab were widely used in photocatalysis. Their electronic structures are the most crucial factor in high photocatalytic activity. Bi-doped La2Ti2O7 gradually converts to La-doped Bi4Ti3O12 with the incorporation of bismuth ions, and the two phases build an S-scheme heterojunction. More oxygen vacancies were introduced into the S-scheme heterojunction after heat treatment in a nitrogen atmosphere. The 0.1BTO/LTO-OV sample exhibits the largest NO removal efficiency of 52% and only 5.6 ppb NO2 intermediate generation. The improved NO removal efficiency was ascribed to the synergistic effect of oxygen vacancies, doping and heterojunction, providing a new insight into the photocatalytic NO removal. The photocatalytic mechanism was eventually proposed on the basis of trapping experiments.",

keywords = "Doping, Heterojunction, NO removal, Oxygen vacancy, Photocatalysis",

author = "Li Lv and Lin Lei and Chen, {Qi Wen} and Yin, {Cheng Li} and Huiqing Fan and Zhou, {Jian Ping}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2024",

month = apr,

doi = "10.1016/j.apcatb.2023.123464",

language = "英语",

volume = "343",

journal = "Applied Catalysis B: Environmental",

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T1 - Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La2Ti2O7 and La-doped Bi4Ti3O12 to improve the NO gas removal avoiding NO2 product

AU - Lv, Li

AU - Lei, Lin

AU - Chen, Qi Wen

AU - Yin, Cheng Li

AU - Fan, Huiqing

AU - Zhou, Jian Ping

PY - 2024/4

Y1 - 2024/4

N2 - Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 with layered crystal structure constructed by the perovskite slab were widely used in photocatalysis. Their electronic structures are the most crucial factor in high photocatalytic activity. Bi-doped La2Ti2O7 gradually converts to La-doped Bi4Ti3O12 with the incorporation of bismuth ions, and the two phases build an S-scheme heterojunction. More oxygen vacancies were introduced into the S-scheme heterojunction after heat treatment in a nitrogen atmosphere. The 0.1BTO/LTO-OV sample exhibits the largest NO removal efficiency of 52% and only 5.6 ppb NO2 intermediate generation. The improved NO removal efficiency was ascribed to the synergistic effect of oxygen vacancies, doping and heterojunction, providing a new insight into the photocatalytic NO removal. The photocatalytic mechanism was eventually proposed on the basis of trapping experiments.

AB - Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 with layered crystal structure constructed by the perovskite slab were widely used in photocatalysis. Their electronic structures are the most crucial factor in high photocatalytic activity. Bi-doped La2Ti2O7 gradually converts to La-doped Bi4Ti3O12 with the incorporation of bismuth ions, and the two phases build an S-scheme heterojunction. More oxygen vacancies were introduced into the S-scheme heterojunction after heat treatment in a nitrogen atmosphere. The 0.1BTO/LTO-OV sample exhibits the largest NO removal efficiency of 52% and only 5.6 ppb NO2 intermediate generation. The improved NO removal efficiency was ascribed to the synergistic effect of oxygen vacancies, doping and heterojunction, providing a new insight into the photocatalytic NO removal. The photocatalytic mechanism was eventually proposed on the basis of trapping experiments.

KW - Doping

KW - Heterojunction

KW - NO removal

KW - Oxygen vacancy

KW - Photocatalysis

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DO - 10.1016/j.apcatb.2023.123464

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AN - SCOPUS:85176590834

SN - 0926-3373

VL - 343

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 123464

ER -

Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La₂Ti₂O₇ and La-doped Bi₄Ti₃O₁₂ to improve the NO gas removal avoiding NO₂ product

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Keywords

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