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

    Research output: Contribution to journalArticlepeer-review

    48 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 languageEnglish
    Pages (from-to)186-194
    Number of pages9
    JournalMaterials and Design
    Volume159
    DOIs
    Publication statusPublished - 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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