Importance of the tuning of band position in optimizing the electronic coupling and photocatalytic activity of nanocomposite

Xiaoyan Jin; Eun Kyung Mok; Ji Won Baek; Sang Hyun Park; Seong Ju Hwang

doi:10.1016/j.jssc.2015.07.006

Importance of the tuning of band position in optimizing the electronic coupling and photocatalytic activity of nanocomposite

Xiaoyan Jin, Eun Kyung Mok, Ji Won Baek, Sang Hyun Park, Seong Ju Hwang

Department of Materials Science and Engineering

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

3 Citations (Scopus)

Abstract

Abstract The electronic coupling and photocatalytic activity of Ag₂CO₃-TiO₂ nanocomposite can be optimized by the fine-tuning of the band position of titanium oxide with nitrogen doping. The increase of the valence band energy of TiO₂ by N-doping leads not only to the enhanced absorption of visible light but also to the promoted hole transfer from Ag₂CO₃ to TiO₂, resulting in the efficient spatial separation of photogenerated electrons and holes. While the undoped Ag₂CO₃-TiO₂ nanocomposite shows an inferior photocatalytic activity to the pure Ag₂CO₃, the photocatalyst performance of N-doped nanocomposite is better than those of Ag₂CO₃ and undoped Ag₂CO₃-TiO₂ nanocomposite. This observation underscores a significant enhancement of the photocatalytic activity of nanocomposite upon N-doping, a result of enhanced electronic coupling between the hybridized species. The present results clearly demonstrate the importance of the fine-tuning of band position in optimizing the photocatalytic activity of hybrid-type photocatalysts.

Original language	English
Article number	18978
Pages (from-to)	175-181
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	230
DOIs	https://doi.org/10.1016/j.jssc.2015.07.006
Publication status	Published - 2015 Jul 18

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MISP) No. NRF-2014R1A2A1A10052809 ) and by the Global Frontier R&D Program ( 2013-073298 ) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning .

Publisher Copyright:
© 2015 Elsevier Inc.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jssc.2015.07.006

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title = "Importance of the tuning of band position in optimizing the electronic coupling and photocatalytic activity of nanocomposite",

abstract = "Abstract The electronic coupling and photocatalytic activity of Ag2CO3-TiO2 nanocomposite can be optimized by the fine-tuning of the band position of titanium oxide with nitrogen doping. The increase of the valence band energy of TiO2 by N-doping leads not only to the enhanced absorption of visible light but also to the promoted hole transfer from Ag2CO3 to TiO2, resulting in the efficient spatial separation of photogenerated electrons and holes. While the undoped Ag2CO3-TiO2 nanocomposite shows an inferior photocatalytic activity to the pure Ag2CO3, the photocatalyst performance of N-doped nanocomposite is better than those of Ag2CO3 and undoped Ag2CO3-TiO2 nanocomposite. This observation underscores a significant enhancement of the photocatalytic activity of nanocomposite upon N-doping, a result of enhanced electronic coupling between the hybridized species. The present results clearly demonstrate the importance of the fine-tuning of band position in optimizing the photocatalytic activity of hybrid-type photocatalysts.",

author = "Xiaoyan Jin and Mok, {Eun Kyung} and Baek, {Ji Won} and Park, {Sang Hyun} and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MISP) No. NRF-2014R1A2A1A10052809 ) and by the Global Frontier R&D Program ( 2013-073298 ) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning . Publisher Copyright: {\textcopyright} 2015 Elsevier Inc.",

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doi = "10.1016/j.jssc.2015.07.006",

language = "English",

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AU - Jin, Xiaoyan

AU - Mok, Eun Kyung

AU - Baek, Ji Won

AU - Park, Sang Hyun

AU - Hwang, Seong Ju

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MISP) No. NRF-2014R1A2A1A10052809 ) and by the Global Frontier R&D Program ( 2013-073298 ) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning . Publisher Copyright: © 2015 Elsevier Inc.

PY - 2015/7/18

Y1 - 2015/7/18

N2 - Abstract The electronic coupling and photocatalytic activity of Ag2CO3-TiO2 nanocomposite can be optimized by the fine-tuning of the band position of titanium oxide with nitrogen doping. The increase of the valence band energy of TiO2 by N-doping leads not only to the enhanced absorption of visible light but also to the promoted hole transfer from Ag2CO3 to TiO2, resulting in the efficient spatial separation of photogenerated electrons and holes. While the undoped Ag2CO3-TiO2 nanocomposite shows an inferior photocatalytic activity to the pure Ag2CO3, the photocatalyst performance of N-doped nanocomposite is better than those of Ag2CO3 and undoped Ag2CO3-TiO2 nanocomposite. This observation underscores a significant enhancement of the photocatalytic activity of nanocomposite upon N-doping, a result of enhanced electronic coupling between the hybridized species. The present results clearly demonstrate the importance of the fine-tuning of band position in optimizing the photocatalytic activity of hybrid-type photocatalysts.

AB - Abstract The electronic coupling and photocatalytic activity of Ag2CO3-TiO2 nanocomposite can be optimized by the fine-tuning of the band position of titanium oxide with nitrogen doping. The increase of the valence band energy of TiO2 by N-doping leads not only to the enhanced absorption of visible light but also to the promoted hole transfer from Ag2CO3 to TiO2, resulting in the efficient spatial separation of photogenerated electrons and holes. While the undoped Ag2CO3-TiO2 nanocomposite shows an inferior photocatalytic activity to the pure Ag2CO3, the photocatalyst performance of N-doped nanocomposite is better than those of Ag2CO3 and undoped Ag2CO3-TiO2 nanocomposite. This observation underscores a significant enhancement of the photocatalytic activity of nanocomposite upon N-doping, a result of enhanced electronic coupling between the hybridized species. The present results clearly demonstrate the importance of the fine-tuning of band position in optimizing the photocatalytic activity of hybrid-type photocatalysts.

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Importance of the tuning of band position in optimizing the electronic coupling and photocatalytic activity of nanocomposite

Abstract

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