Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

Jixian Wang; Xin Xin Tian; Lei Yu; David J. Young; Wen Bao Wang; Hai Yan Li; Hong Xi Li

doi:10.1039/d1ta07634e

Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

Jixian Wang, Xin Xin Tian, Lei Yu, David J. Young, Wen Bao Wang, Hai Yan Li, Hong Xi Li

CDU College of Engineering, IT and Environment

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

Abstract

Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator 3,5-dimethylbenzaldehyde relative to three equivalents of linker) for water-splitting have been prepared bearing a controlled proportion of structural defects. These defects significantly enhanced photocatalytic H2 production. Hydrogen evolution rates of 33 910 μmol g-1 h-1 were achieved, with the maximum H2 evolution rate for TAPT-COF-7 2.3 times that of parent TAPT-COF. Time-resolved fluorescence measurements and electrochemical impedance spectroscopy indicated that TAPT-COF-7 also possessed the highest charge separation efficiency.

Original language	English
Pages (from-to)	25474-25479
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	45
DOIs	https://doi.org/10.1039/d1ta07634e
Publication status	Published - 7 Dec 2021

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title = "Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity",

abstract = "Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator 3,5-dimethylbenzaldehyde relative to three equivalents of linker) for water-splitting have been prepared bearing a controlled proportion of structural defects. These defects significantly enhanced photocatalytic H2 production. Hydrogen evolution rates of 33 910 μmol g-1 h-1 were achieved, with the maximum H2 evolution rate for TAPT-COF-7 2.3 times that of parent TAPT-COF. Time-resolved fluorescence measurements and electrochemical impedance spectroscopy indicated that TAPT-COF-7 also possessed the highest charge separation efficiency.",

author = "Jixian Wang and Tian, {Xin Xin} and Lei Yu and Young, {David J.} and Wang, {Wen Bao} and Li, {Hai Yan} and Li, {Hong Xi}",

note = "Funding Information: The authors thank the National Natural Science Foundation of China (21971182 and 21771131), the “Priority Academic Program Development” of Jiangsu Higher Education Institutions. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = dec,

day = "7",

doi = "10.1039/d1ta07634e",

language = "English",

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TY - JOUR

T1 - Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

AU - Wang, Jixian

AU - Tian, Xin Xin

AU - Yu, Lei

AU - Young, David J.

AU - Wang, Wen Bao

AU - Li, Hai Yan

AU - Li, Hong Xi

N1 - Funding Information: The authors thank the National Natural Science Foundation of China (21971182 and 21771131), the “Priority Academic Program Development” of Jiangsu Higher Education Institutions. Publisher Copyright: © The Royal Society of Chemistry. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/12/7

Y1 - 2021/12/7

N2 - Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator 3,5-dimethylbenzaldehyde relative to three equivalents of linker) for water-splitting have been prepared bearing a controlled proportion of structural defects. These defects significantly enhanced photocatalytic H2 production. Hydrogen evolution rates of 33 910 μmol g-1 h-1 were achieved, with the maximum H2 evolution rate for TAPT-COF-7 2.3 times that of parent TAPT-COF. Time-resolved fluorescence measurements and electrochemical impedance spectroscopy indicated that TAPT-COF-7 also possessed the highest charge separation efficiency.

AB - Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator 3,5-dimethylbenzaldehyde relative to three equivalents of linker) for water-splitting have been prepared bearing a controlled proportion of structural defects. These defects significantly enhanced photocatalytic H2 production. Hydrogen evolution rates of 33 910 μmol g-1 h-1 were achieved, with the maximum H2 evolution rate for TAPT-COF-7 2.3 times that of parent TAPT-COF. Time-resolved fluorescence measurements and electrochemical impedance spectroscopy indicated that TAPT-COF-7 also possessed the highest charge separation efficiency.

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U2 - 10.1039/d1ta07634e

DO - 10.1039/d1ta07634e

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SP - 25474

EP - 25479

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7496

IS - 45

ER -

Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

Abstract

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