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首页> 外文期刊>Advanced Functional Materials >Anion-Doped Mixed Metal Oxide Nanostructures Derived from Layered Double Hydroxide as Visible Light Photocatalysts
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Anion-Doped Mixed Metal Oxide Nanostructures Derived from Layered Double Hydroxide as Visible Light Photocatalysts

机译：层状双氢氧根作为可见光光催化剂衍生的阴离子掺杂混合金属氧化物纳米结构

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摘要

Mixed metal oxide (MMO) nanostructures co-doped uniformly by carbon and nitrogen are synthesized for the first time by annealing a terephthalate-intercalated layered double hydroxide (LDH) under ammonia gas flow. The interlayer gallery of LDH allows effective access of NH_3 and the carbon source to its crystal lattice for a uniform nitrogen and carbon doping. Such co-doped MMO exhibit significantly red-shifted absorption spectra to visible light region relative to pure MMO. Photoelectrochemical water oxidation and incident-photon-to-current-conversion efficiency of LDH-derived photocatalysts demonstrate that all the visible light absorption caused by the anion doping contributes to the photocatalytic activity over the entire absorbed wavelength range of < 610 nm. Density functional theory calculations of electronic structures are performed to elucidate the possibility of bandgap narrowing upon nitrogen and carbon co-doping on MMO structures.
机译：通过在氨气流下退火对苯二甲酸酯插层的双氢氧化物（LDH），首次合成了碳和氮均匀掺杂的混合金属氧化物（MMO）纳米结构。 LDH的夹层通道允许NH_3和碳源有效进入其晶格，以实现均匀的氮和碳掺杂。相对于纯MMO，这种共掺杂的MMO对可见光区域显示出明显红移的吸收光谱。 LDH衍生的光催化剂的光电化学水氧化和入射光子到电流的转换效率表明，由阴离子掺杂引起的所有可见光吸收在<610 nm的整个吸收波长范围内都有助于光催化活性。进行电子结构的密度泛函理论计算以阐明在MMO结构上氮和碳共掺杂时带隙变窄的可能性。

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  • 来源
    《Advanced Functional Materials》 |2013年第19期|2348-2356|共9页
  • 作者

    Seungho Cho; Ji-Wook Jang; Ki-jeong Kong; Eun Sun Kim; Kun-Hong Lee; Jae Sung Lee;

  • 作者单位

    Department of Chemical Engineering Division of Advanced Nuclear Engineering Pohang University of Science and Technology (POSTECH) San 31, Hyoja-dong, Pohang, 790-784, South Korea;

    Department of Chemical Engineering Division of Advanced Nuclear Engineering Pohang University of Science and Technology (POSTECH) San 31, Hyoja-dong, Pohang, 790-784, South Korea;

    Korea Institute of Chemical Technology 100 Jang-dong, Yuseong-gu, Daejeon, 305-343, South Korea;

    Department of Chemical Engineering Division of Advanced Nuclear Engineering Pohang University of Science and Technology (POSTECH) San 31, Hyoja-dong, Pohang, 790-784, South Korea;

    Department of Chemical Engineering Division of Advanced Nuclear Engineering Pohang University of Science and Technology (POSTECH) San 31, Hyoja-dong, Pohang, 790-784, South Korea;

    Department of Chemical Engineering Division of Advanced Nuclear Engineering Pohang University of Science and Technology (POSTECH) San 31, Hyoja-dong, Pohang, 790-784, South Korea;

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