Ionic liquid-assisted preparation of Ag-CeO2 nanocomposites and their improved photocatalytic activity

Dung Van Dao; Thuy T.D. Nguyen; Hyeon Yong Song; Jin Kyu Yang; Tae Won Kim; Yeon Tae Yu; In Hwan Lee

doi:10.1016/j.matdes.2018.08.042

Ionic liquid-assisted preparation of Ag-CeO₂ nanocomposites and their improved photocatalytic activity

Dung Van Dao, Thuy T.D. Nguyen, Hyeon Yong Song, Jin Kyu Yang, Tae Won Kim, Yeon Tae Yu, In Hwan Lee

Department of Materials Science and Engineering

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

43 Citations (Scopus)

Abstract

As a good stabilizer, [BMIM]BF₄ ionic liquid (IL) has been successfully utilized to assist preparation of Ag nanoparticles (NPs) decorated on CeO₂ supports. The obtained IL-stabilized Ag-CeO₂ nanocomposite showed better photocatalytic degradation activity (92%) of Auramine O (AO) dye as compared with pure CeO₂ (35%) NPs and IL-free Ag-CeO₂ (65%) nanocomposite after 90 min of visible light irradiation. The improvement could be attributable to small size (5 nm) of IL-stabilized Ag NPs loaded on the surface of CeO₂ supports and the large surface area of its nanocomposite (11.11 m²/g). These increase in the interfacial contact areas between IL-stabilized Ag NPs and CeO₂ supports that enhance the charge transfer and reduce the recombination of the photogenerated electron-hole pairs. Further, the IL-stabilized Ag-CeO₂ nanocomposite showed good photocatalytic stability for dye degradation. The persuasible mechanism of enhanced photocatalytic degradation of AO was clearly discussed on the basis of localized surface plasmon resonance (LSPR) effect of Ag NPs as well. Accordingly, this work can pave new pathway to prepare nanoparticles coated on metal oxide nanostructures for the practical applications.

Original language	English
Pages (from-to)	186-194
Number of pages	9
Journal	Materials and Design
Volume	159
DOIs	https://doi.org/10.1016/j.matdes.2018.08.042
Publication status	Published - 2018 Dec 5

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 , 2017R1A2B3006141 ).

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

Ag nanoparticles
CeO
Dye
Ionic liquid
Photocatalysis

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matdes.2018.08.042

Cite this

@article{8c3df8a3ee344a1782b0bec05db95946,

title = "Ionic liquid-assisted preparation of Ag-CeO2 nanocomposites and their improved photocatalytic activity",

abstract = "As a good stabilizer, [BMIM]BF4 ionic liquid (IL) has been successfully utilized to assist preparation of Ag nanoparticles (NPs) decorated on CeO2 supports. The obtained IL-stabilized Ag-CeO2 nanocomposite showed better photocatalytic degradation activity (92%) of Auramine O (AO) dye as compared with pure CeO2 (35%) NPs and IL-free Ag-CeO2 (65%) nanocomposite after 90 min of visible light irradiation. The improvement could be attributable to small size (5 nm) of IL-stabilized Ag NPs loaded on the surface of CeO2 supports and the large surface area of its nanocomposite (11.11 m2/g). These increase in the interfacial contact areas between IL-stabilized Ag NPs and CeO2 supports that enhance the charge transfer and reduce the recombination of the photogenerated electron-hole pairs. Further, the IL-stabilized Ag-CeO2 nanocomposite showed good photocatalytic stability for dye degradation. The persuasible mechanism of enhanced photocatalytic degradation of AO was clearly discussed on the basis of localized surface plasmon resonance (LSPR) effect of Ag NPs as well. Accordingly, this work can pave new pathway to prepare nanoparticles coated on metal oxide nanostructures for the practical applications.",

keywords = "Ag nanoparticles, CeO, Dye, Ionic liquid, Photocatalysis",

author = "{Van Dao}, Dung and Nguyen, {Thuy T.D.} and Song, {Hyeon Yong} and Yang, {Jin Kyu} and Kim, {Tae Won} and Yu, {Yeon Tae} and Lee, {In Hwan}",

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 , 2017R1A2B3006141 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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T1 - Ionic liquid-assisted preparation of Ag-CeO2 nanocomposites and their improved photocatalytic activity

AU - Van Dao, Dung

AU - Nguyen, Thuy T.D.

AU - Song, Hyeon Yong

AU - Yang, Jin Kyu

AU - Kim, Tae Won

AU - Yu, Yeon Tae

AU - Lee, In Hwan

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 , 2017R1A2B3006141 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/12/5

Y1 - 2018/12/5

N2 - As a good stabilizer, [BMIM]BF4 ionic liquid (IL) has been successfully utilized to assist preparation of Ag nanoparticles (NPs) decorated on CeO2 supports. The obtained IL-stabilized Ag-CeO2 nanocomposite showed better photocatalytic degradation activity (92%) of Auramine O (AO) dye as compared with pure CeO2 (35%) NPs and IL-free Ag-CeO2 (65%) nanocomposite after 90 min of visible light irradiation. The improvement could be attributable to small size (5 nm) of IL-stabilized Ag NPs loaded on the surface of CeO2 supports and the large surface area of its nanocomposite (11.11 m2/g). These increase in the interfacial contact areas between IL-stabilized Ag NPs and CeO2 supports that enhance the charge transfer and reduce the recombination of the photogenerated electron-hole pairs. Further, the IL-stabilized Ag-CeO2 nanocomposite showed good photocatalytic stability for dye degradation. The persuasible mechanism of enhanced photocatalytic degradation of AO was clearly discussed on the basis of localized surface plasmon resonance (LSPR) effect of Ag NPs as well. Accordingly, this work can pave new pathway to prepare nanoparticles coated on metal oxide nanostructures for the practical applications.

AB - As a good stabilizer, [BMIM]BF4 ionic liquid (IL) has been successfully utilized to assist preparation of Ag nanoparticles (NPs) decorated on CeO2 supports. The obtained IL-stabilized Ag-CeO2 nanocomposite showed better photocatalytic degradation activity (92%) of Auramine O (AO) dye as compared with pure CeO2 (35%) NPs and IL-free Ag-CeO2 (65%) nanocomposite after 90 min of visible light irradiation. The improvement could be attributable to small size (5 nm) of IL-stabilized Ag NPs loaded on the surface of CeO2 supports and the large surface area of its nanocomposite (11.11 m2/g). These increase in the interfacial contact areas between IL-stabilized Ag NPs and CeO2 supports that enhance the charge transfer and reduce the recombination of the photogenerated electron-hole pairs. Further, the IL-stabilized Ag-CeO2 nanocomposite showed good photocatalytic stability for dye degradation. The persuasible mechanism of enhanced photocatalytic degradation of AO was clearly discussed on the basis of localized surface plasmon resonance (LSPR) effect of Ag NPs as well. Accordingly, this work can pave new pathway to prepare nanoparticles coated on metal oxide nanostructures for the practical applications.

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