Flow-through TiO2 nanotube arrays: a modified support with homogeneous distribution of Ag nanoparticles and their photocatalytic activities

Haidong Bian, Yan Wang, Bao Yuan, Jiewu Cui, Xia Shu, Yucheng Wu, Xinyi Zhang, Samuel B O Adeloju

    Research output: Contribution to journalArticleResearchpeer-review

    18 Citations (Scopus)

    Abstract

    Silver decorated TiO2 nanotube arrays (TNTAs) show great potential applications for photocatalysis and gas sensors. In this work, we report an improved strategy to modify the morphology of flow-through TiO2 nanotube arrays (f-TNTAs) for homogeneous Ag nanoparticle loading, and their photocatalytic activities are also investigated. Firstly, TNTAs were fabricated by potentiostatic anodization in fluoride-containing electrolytes. Subsequently, a high voltage was immediately exerted, and then a low potential was applied at the end of anodization process. The as-prepared f-TNTAs with improved bottom morphologies were finally obtained. This new kind of support was immersed in AgNO3 solution, and then the absorbed silver ions were reduced to metallic Ag0 by UV light. Compared with conventional TiO2 nanotube arrays (c-TNTAs), the modified f-TNTAs show a better ability for the dispersion of Ag nanoparticles (Ag NPs) in different regions (upper, central and bottom region) of the nanotubes. A series of testing measures (XPS, EDX, SEM and XRD) were adopted to confirm this facile process. Ag decorated f-TNTAs were used as photocatalysts for the degradation of Methyl Orange (MO) under UV light. The degradation rate could reach 54 in 10 min, and the complete degradation of MO was observed after 30 min. These results were much better than that of Ag decorated c-TNTAs. The modified f-TNTAs via our method can also be used to couple with other noble metals or compound semiconductors. These composite structures are expected to find potential applications in photoelectric devices, gas sensors, and photocatalysis.
    Original languageEnglish
    Pages (from-to)752 - 760
    Number of pages9
    JournalNew Journal of Chemistry
    Volume37
    Issue number3
    DOIs
    Publication statusPublished - 2013

    Cite this

    Bian, Haidong ; Wang, Yan ; Yuan, Bao ; Cui, Jiewu ; Shu, Xia ; Wu, Yucheng ; Zhang, Xinyi ; Adeloju, Samuel B O. / Flow-through TiO2 nanotube arrays: a modified support with homogeneous distribution of Ag nanoparticles and their photocatalytic activities. In: New Journal of Chemistry. 2013 ; Vol. 37, No. 3. pp. 752 - 760.
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    abstract = "Silver decorated TiO2 nanotube arrays (TNTAs) show great potential applications for photocatalysis and gas sensors. In this work, we report an improved strategy to modify the morphology of flow-through TiO2 nanotube arrays (f-TNTAs) for homogeneous Ag nanoparticle loading, and their photocatalytic activities are also investigated. Firstly, TNTAs were fabricated by potentiostatic anodization in fluoride-containing electrolytes. Subsequently, a high voltage was immediately exerted, and then a low potential was applied at the end of anodization process. The as-prepared f-TNTAs with improved bottom morphologies were finally obtained. This new kind of support was immersed in AgNO3 solution, and then the absorbed silver ions were reduced to metallic Ag0 by UV light. Compared with conventional TiO2 nanotube arrays (c-TNTAs), the modified f-TNTAs show a better ability for the dispersion of Ag nanoparticles (Ag NPs) in different regions (upper, central and bottom region) of the nanotubes. A series of testing measures (XPS, EDX, SEM and XRD) were adopted to confirm this facile process. Ag decorated f-TNTAs were used as photocatalysts for the degradation of Methyl Orange (MO) under UV light. The degradation rate could reach 54 in 10 min, and the complete degradation of MO was observed after 30 min. These results were much better than that of Ag decorated c-TNTAs. The modified f-TNTAs via our method can also be used to couple with other noble metals or compound semiconductors. These composite structures are expected to find potential applications in photoelectric devices, gas sensors, and photocatalysis.",
    author = "Haidong Bian and Yan Wang and Bao Yuan and Jiewu Cui and Xia Shu and Yucheng Wu and Xinyi Zhang and Adeloju, {Samuel B O}",
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    Flow-through TiO2 nanotube arrays: a modified support with homogeneous distribution of Ag nanoparticles and their photocatalytic activities. / Bian, Haidong; Wang, Yan; Yuan, Bao; Cui, Jiewu; Shu, Xia; Wu, Yucheng; Zhang, Xinyi; Adeloju, Samuel B O.

    In: New Journal of Chemistry, Vol. 37, No. 3, 2013, p. 752 - 760.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Flow-through TiO2 nanotube arrays: a modified support with homogeneous distribution of Ag nanoparticles and their photocatalytic activities

    AU - Bian, Haidong

    AU - Wang, Yan

    AU - Yuan, Bao

    AU - Cui, Jiewu

    AU - Shu, Xia

    AU - Wu, Yucheng

    AU - Zhang, Xinyi

    AU - Adeloju, Samuel B O

    PY - 2013

    Y1 - 2013

    N2 - Silver decorated TiO2 nanotube arrays (TNTAs) show great potential applications for photocatalysis and gas sensors. In this work, we report an improved strategy to modify the morphology of flow-through TiO2 nanotube arrays (f-TNTAs) for homogeneous Ag nanoparticle loading, and their photocatalytic activities are also investigated. Firstly, TNTAs were fabricated by potentiostatic anodization in fluoride-containing electrolytes. Subsequently, a high voltage was immediately exerted, and then a low potential was applied at the end of anodization process. The as-prepared f-TNTAs with improved bottom morphologies were finally obtained. This new kind of support was immersed in AgNO3 solution, and then the absorbed silver ions were reduced to metallic Ag0 by UV light. Compared with conventional TiO2 nanotube arrays (c-TNTAs), the modified f-TNTAs show a better ability for the dispersion of Ag nanoparticles (Ag NPs) in different regions (upper, central and bottom region) of the nanotubes. A series of testing measures (XPS, EDX, SEM and XRD) were adopted to confirm this facile process. Ag decorated f-TNTAs were used as photocatalysts for the degradation of Methyl Orange (MO) under UV light. The degradation rate could reach 54 in 10 min, and the complete degradation of MO was observed after 30 min. These results were much better than that of Ag decorated c-TNTAs. The modified f-TNTAs via our method can also be used to couple with other noble metals or compound semiconductors. These composite structures are expected to find potential applications in photoelectric devices, gas sensors, and photocatalysis.

    AB - Silver decorated TiO2 nanotube arrays (TNTAs) show great potential applications for photocatalysis and gas sensors. In this work, we report an improved strategy to modify the morphology of flow-through TiO2 nanotube arrays (f-TNTAs) for homogeneous Ag nanoparticle loading, and their photocatalytic activities are also investigated. Firstly, TNTAs were fabricated by potentiostatic anodization in fluoride-containing electrolytes. Subsequently, a high voltage was immediately exerted, and then a low potential was applied at the end of anodization process. The as-prepared f-TNTAs with improved bottom morphologies were finally obtained. This new kind of support was immersed in AgNO3 solution, and then the absorbed silver ions were reduced to metallic Ag0 by UV light. Compared with conventional TiO2 nanotube arrays (c-TNTAs), the modified f-TNTAs show a better ability for the dispersion of Ag nanoparticles (Ag NPs) in different regions (upper, central and bottom region) of the nanotubes. A series of testing measures (XPS, EDX, SEM and XRD) were adopted to confirm this facile process. Ag decorated f-TNTAs were used as photocatalysts for the degradation of Methyl Orange (MO) under UV light. The degradation rate could reach 54 in 10 min, and the complete degradation of MO was observed after 30 min. These results were much better than that of Ag decorated c-TNTAs. The modified f-TNTAs via our method can also be used to couple with other noble metals or compound semiconductors. These composite structures are expected to find potential applications in photoelectric devices, gas sensors, and photocatalysis.

    U2 - 10.1039/c2nj41011g

    DO - 10.1039/c2nj41011g

    M3 - Article

    VL - 37

    SP - 752

    EP - 760

    JO - New Journal of Chemistry

    JF - New Journal of Chemistry

    SN - 1144-0546

    IS - 3

    ER -