Water-assisted formation of amine-bridged carbon nitride: A structural insight into the photocatalytic performance for H2 evolution under visible light

Dawoon Jang; Seungjoo Choi; Nam Hee Kwon; Kyung Yeon Jang; Suyeon Lee; Tae Woo Lee; Seong Ju Hwang; Hyungjun Kim; Jeongho Kim; Sungjin Park

doi:10.1016/j.apcatb.2022.121313

Water-assisted formation of amine-bridged carbon nitride: A structural insight into the photocatalytic performance for H₂ evolution under visible light

Dawoon Jang, Seungjoo Choi, Nam Hee Kwon, Kyung Yeon Jang, Suyeon Lee, Tae Woo Lee, Seong Ju Hwang, Hyungjun Kim, Jeongho Kim, Sungjin Park

Department of Materials Science and Engineering

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

11 Citations (Scopus)

Abstract

Carbon nitride (C₃N₄) exhibits significant potential as a metal-free photocatalyst for H₂ production using visible light. While the C₃N₄ network consists of tri-s-triazine building units linked by H bonds, it is still controversial how the H bonds affect the photocatalytic performance. In this study, we present a water-assisted method for production of polymeric carbon nitride to control intraplanar structures associated with H bonds and amine bridges. The C₃N₄ samples produced with a thermal treatment using water and humidified air gas (CN-H) exhibit excellent photocatalytic activities for the hydrogen evolution reaction. From structural and photophysical characterizations, it is found that CN-H samples contain fewer H bonds and more amine bridging groups as well as possess larger domains than C₃N₄ samples produced without using water (CN-A). These structural changes induced by the water treatment lead to efficient intraplanar migration of photoexcited charge carriers and thus are responsible for the enhanced photocatalytic performances.

Original language	English
Article number	121313
Journal	Applied Catalysis B: Environmental
Volume	310
DOIs	https://doi.org/10.1016/j.apcatb.2022.121313
Publication status	Published - 2022 Aug 5

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government ( MEST ) ( 2021R1A2B5B02001587, 2021R1F1A1048431 , and 2020R1A2C3008671 ). We thank the Busan Center at the Korea Basic Science Institute (KBSI) for XPS analysis.

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government (MEST) (2021R1A2B5B02001587, 2021R1F1A1048431, and 2020R1A2C3008671). We thank the Busan Center at the Korea Basic Science Institute (KBSI) for XPS analysis.

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Catalysis
Environmental Science(all)
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2022.121313

Cite this

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title = "Water-assisted formation of amine-bridged carbon nitride: A structural insight into the photocatalytic performance for H2 evolution under visible light",

abstract = "Carbon nitride (C3N4) exhibits significant potential as a metal-free photocatalyst for H2 production using visible light. While the C3N4 network consists of tri-s-triazine building units linked by H bonds, it is still controversial how the H bonds affect the photocatalytic performance. In this study, we present a water-assisted method for production of polymeric carbon nitride to control intraplanar structures associated with H bonds and amine bridges. The C3N4 samples produced with a thermal treatment using water and humidified air gas (CN-H) exhibit excellent photocatalytic activities for the hydrogen evolution reaction. From structural and photophysical characterizations, it is found that CN-H samples contain fewer H bonds and more amine bridging groups as well as possess larger domains than C3N4 samples produced without using water (CN-A). These structural changes induced by the water treatment lead to efficient intraplanar migration of photoexcited charge carriers and thus are responsible for the enhanced photocatalytic performances.",

author = "Dawoon Jang and Seungjoo Choi and Kwon, {Nam Hee} and Jang, {Kyung Yeon} and Suyeon Lee and Lee, {Tae Woo} and Hwang, {Seong Ju} and Hyungjun Kim and Jeongho Kim and Sungjin Park",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government ( MEST ) ( 2021R1A2B5B02001587, 2021R1F1A1048431 , and 2020R1A2C3008671 ). We thank the Busan Center at the Korea Basic Science Institute (KBSI) for XPS analysis. Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government (MEST) (2021R1A2B5B02001587, 2021R1F1A1048431, and 2020R1A2C3008671). We thank the Busan Center at the Korea Basic Science Institute (KBSI) for XPS analysis. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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T2 - A structural insight into the photocatalytic performance for H2 evolution under visible light

AU - Jang, Dawoon

AU - Choi, Seungjoo

AU - Kwon, Nam Hee

AU - Jang, Kyung Yeon

AU - Lee, Suyeon

AU - Lee, Tae Woo

AU - Hwang, Seong Ju

AU - Kim, Hyungjun

AU - Kim, Jeongho

AU - Park, Sungjin

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Y1 - 2022/8/5

N2 - Carbon nitride (C3N4) exhibits significant potential as a metal-free photocatalyst for H2 production using visible light. While the C3N4 network consists of tri-s-triazine building units linked by H bonds, it is still controversial how the H bonds affect the photocatalytic performance. In this study, we present a water-assisted method for production of polymeric carbon nitride to control intraplanar structures associated with H bonds and amine bridges. The C3N4 samples produced with a thermal treatment using water and humidified air gas (CN-H) exhibit excellent photocatalytic activities for the hydrogen evolution reaction. From structural and photophysical characterizations, it is found that CN-H samples contain fewer H bonds and more amine bridging groups as well as possess larger domains than C3N4 samples produced without using water (CN-A). These structural changes induced by the water treatment lead to efficient intraplanar migration of photoexcited charge carriers and thus are responsible for the enhanced photocatalytic performances.

AB - Carbon nitride (C3N4) exhibits significant potential as a metal-free photocatalyst for H2 production using visible light. While the C3N4 network consists of tri-s-triazine building units linked by H bonds, it is still controversial how the H bonds affect the photocatalytic performance. In this study, we present a water-assisted method for production of polymeric carbon nitride to control intraplanar structures associated with H bonds and amine bridges. The C3N4 samples produced with a thermal treatment using water and humidified air gas (CN-H) exhibit excellent photocatalytic activities for the hydrogen evolution reaction. From structural and photophysical characterizations, it is found that CN-H samples contain fewer H bonds and more amine bridging groups as well as possess larger domains than C3N4 samples produced without using water (CN-A). These structural changes induced by the water treatment lead to efficient intraplanar migration of photoexcited charge carriers and thus are responsible for the enhanced photocatalytic performances.

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