Nitrogen doping on the core-shell structured Au@TiO2 nanoparticles and its enhanced photocatalytic hydrogen evolution under visible light irradiation

Gautam Kumar Naik; Sanjit Manohar Majhi; Kwang Un Jeong; In Hwan Lee; Yeon Tae Yu

doi:10.1016/j.jallcom.2018.08.277

Nitrogen doping on the core-shell structured Au@TiO₂ nanoparticles and its enhanced photocatalytic hydrogen evolution under visible light irradiation

Gautam Kumar Naik, Sanjit Manohar Majhi, Kwang Un Jeong, In Hwan Lee, Yeon Tae Yu

Department of Materials Science and Engineering

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

33 Citations (Scopus)

Abstract

The current study concerns about the large band gap of TiO₂ for its use as photocatalysts. The photocatalytic activity of core-shell structured Au@TiO₂ nanoparticles were enhanced by the doping of nitrogen. The nitrogen doping has been done by simple hydrothermal method taking ethylenediamine as the precursor for nitrogen. The crystals structure of TiO₂ shell remained unaltered even with the introduction of nitrogen. The photocatalytic activity of the prepared samples were evaluated towards the hydrogen evolution from photocatalytic water splitting under solar light irradiation. It was found that nitrogen doped core-shell structured Au@TiO₂ nanoparticles (Au@N-TiO₂) showed higher photocatalytic activity with an average H₂ evolution rate of 4880 μmol h⁻¹g⁻¹, which is 3.79 times more than that of bare TiO₂ in 4 h under xenon light irradiation. The relationship among the other samples was in order of Au@N-TiO₂ > Au@TiO₂ > N-TiO₂ > TiO₂. This enhanced photocatalytic activity of Au@N-TiO₂ can be responsible for the formation of an plasmonic photocatalyst and the formation of an impurity band between the conduction band (CB) and the valence band (VB) of TiO₂.

Original language	English
Pages (from-to)	505-512
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	771
DOIs	https://doi.org/10.1016/j.jallcom.2018.08.277
Publication status	Published - 2019 Jan 15

Bibliographical note

Funding Information:
This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development , 2) National Research Foundation of Korea (NRF) grant funded by the Korean government ( MSIP ) (BRL No. 2015042417 , 2016R1A2B4014090 ) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017.

Funding Information:
This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development, 2) National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (BRL No. 2015042417, 2016R1A2B4014090) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017.

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Core-shell
Hydrogen evolution
Nitrogen doped
TiO
Water splitting

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jallcom.2018.08.277

Cite this

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title = "Nitrogen doping on the core-shell structured Au@TiO2 nanoparticles and its enhanced photocatalytic hydrogen evolution under visible light irradiation",

abstract = "The current study concerns about the large band gap of TiO2 for its use as photocatalysts. The photocatalytic activity of core-shell structured Au@TiO2 nanoparticles were enhanced by the doping of nitrogen. The nitrogen doping has been done by simple hydrothermal method taking ethylenediamine as the precursor for nitrogen. The crystals structure of TiO2 shell remained unaltered even with the introduction of nitrogen. The photocatalytic activity of the prepared samples were evaluated towards the hydrogen evolution from photocatalytic water splitting under solar light irradiation. It was found that nitrogen doped core-shell structured Au@TiO2 nanoparticles (Au@N-TiO2) showed higher photocatalytic activity with an average H2 evolution rate of 4880 μmol h−1g−1, which is 3.79 times more than that of bare TiO2 in 4 h under xenon light irradiation. The relationship among the other samples was in order of Au@N-TiO2 > Au@TiO2 > N-TiO2 > TiO2. This enhanced photocatalytic activity of Au@N-TiO2 can be responsible for the formation of an plasmonic photocatalyst and the formation of an impurity band between the conduction band (CB) and the valence band (VB) of TiO2.",

keywords = "Core-shell, Hydrogen evolution, Nitrogen doped, TiO, Water splitting",

author = "Naik, {Gautam Kumar} and Majhi, {Sanjit Manohar} and Jeong, {Kwang Un} and Lee, {In Hwan} and Yu, {Yeon Tae}",

note = "Funding Information: This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development , 2) National Research Foundation of Korea (NRF) grant funded by the Korean government ( MSIP ) (BRL No. 2015042417 , 2016R1A2B4014090 ) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017. Funding Information: This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development, 2) National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (BRL No. 2015042417, 2016R1A2B4014090) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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T1 - Nitrogen doping on the core-shell structured Au@TiO2 nanoparticles and its enhanced photocatalytic hydrogen evolution under visible light irradiation

AU - Naik, Gautam Kumar

AU - Majhi, Sanjit Manohar

AU - Jeong, Kwang Un

AU - Lee, In Hwan

AU - Yu, Yeon Tae

N1 - Funding Information: This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development , 2) National Research Foundation of Korea (NRF) grant funded by the Korean government ( MSIP ) (BRL No. 2015042417 , 2016R1A2B4014090 ) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017. Funding Information: This work was supported by 1) BK21 plus program from the Ministry of Education and Human-Resource Development, 2) National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (BRL No. 2015042417, 2016R1A2B4014090) and 3) “Research Base Construction Fund Support Program” funded by Chonbuk National University in 2017. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2019/1/15

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N2 - The current study concerns about the large band gap of TiO2 for its use as photocatalysts. The photocatalytic activity of core-shell structured Au@TiO2 nanoparticles were enhanced by the doping of nitrogen. The nitrogen doping has been done by simple hydrothermal method taking ethylenediamine as the precursor for nitrogen. The crystals structure of TiO2 shell remained unaltered even with the introduction of nitrogen. The photocatalytic activity of the prepared samples were evaluated towards the hydrogen evolution from photocatalytic water splitting under solar light irradiation. It was found that nitrogen doped core-shell structured Au@TiO2 nanoparticles (Au@N-TiO2) showed higher photocatalytic activity with an average H2 evolution rate of 4880 μmol h−1g−1, which is 3.79 times more than that of bare TiO2 in 4 h under xenon light irradiation. The relationship among the other samples was in order of Au@N-TiO2 > Au@TiO2 > N-TiO2 > TiO2. This enhanced photocatalytic activity of Au@N-TiO2 can be responsible for the formation of an plasmonic photocatalyst and the formation of an impurity band between the conduction band (CB) and the valence band (VB) of TiO2.

AB - The current study concerns about the large band gap of TiO2 for its use as photocatalysts. The photocatalytic activity of core-shell structured Au@TiO2 nanoparticles were enhanced by the doping of nitrogen. The nitrogen doping has been done by simple hydrothermal method taking ethylenediamine as the precursor for nitrogen. The crystals structure of TiO2 shell remained unaltered even with the introduction of nitrogen. The photocatalytic activity of the prepared samples were evaluated towards the hydrogen evolution from photocatalytic water splitting under solar light irradiation. It was found that nitrogen doped core-shell structured Au@TiO2 nanoparticles (Au@N-TiO2) showed higher photocatalytic activity with an average H2 evolution rate of 4880 μmol h−1g−1, which is 3.79 times more than that of bare TiO2 in 4 h under xenon light irradiation. The relationship among the other samples was in order of Au@N-TiO2 > Au@TiO2 > N-TiO2 > TiO2. This enhanced photocatalytic activity of Au@N-TiO2 can be responsible for the formation of an plasmonic photocatalyst and the formation of an impurity band between the conduction band (CB) and the valence band (VB) of TiO2.

KW - Core-shell

KW - Hydrogen evolution

KW - Nitrogen doped

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KW - Water splitting

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