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首页> 外文期刊>RSC Advances >Solar and visible light photocatalytic enhancement of halloysite nanotubes/g-C3N4 heteroarchitectures
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Solar and visible light photocatalytic enhancement of halloysite nanotubes/g-C3N4 heteroarchitectures

机译：Lolloysite Nanotubes / G-C3N4异质建筑的太阳能和可见光光催化增强

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摘要

Novel heteroarchitectures made of graphitic carbon nitride (g-C3N4) and halloysite nanotubes (HNTs) were prepared by a facile and soft self-assembly strategy. The morphological, structural and electronic properties of the HNTs/g-C3N4 nanocomposites were determined by means of a plethora of techniques including N-2 physisorption, XRD, FT-IR, TEM, UV-Vis absorption, XPS, zeta potential and photoluminescence (PL). Their photocatalytic activity was evaluated under both simulated solar light and pure visible light irradiation against the photodegradation of neutral, positively and negatively charged pollutants, namely phenol, methylene blue (MB) and methyl orange (MO), respectively. The prepared HNTs/g-C3N4 nanocomposites were proven to be durable and significantly more efficient than the pure g-C3N4 reference for the degradation of positively charged and neutral organics. The nanocomposites presented increased charge carrier formation and reduced recombination rates due to the tight contact between the two components. The enhanced photoactivity was attributed to the dual function of HNTs enhancing (a) the abundance and stability of the photogenerated e(-) and h(+) pairs and (b) the adsorption of positively charged organics on the nanocomposite. Both functions originate from the charged surface of HNTs.
机译：采用容易和软的自组装策略制备由石墨氮化物（G-C3N4）和霍罗伊钛矿纳米管（HNT）制成的新型异质建筑。 HNTS / G-C3N4纳米复合材料的形态学，结构和电子性质通过血红蛋征测定，包括N-2物理吸附，XRD，FT-IR，TEM，UV-Vis吸收，XPS，Zeta电位和光致发光（ pl）。在模拟的太阳能光和纯可见光照射下评估它们的光催化活性，以防止中性，带负电荷污染物，即苯酚，亚甲基蓝（Mb）和甲基橙（Mo）的光降解。经过证明制备的HNT / G-C3N4纳米复合材料比纯G-C3N4参考为正电荷和中性有机物的降解，被证明是耐用的并且显着更有效。由于两个组分之间的紧密接触，纳米复合材料呈现增加的电荷载体形成和降低的重组速率。增强的光度归因于HNT的双重功能，增强（a）光生E（ - ）和H（+）对的丰度和稳定性和（b）在纳米复合材料上吸附带正电气的有机物。这两种功能源自HNT的带电表面。

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  • 来源
    《RSC Advances》 |2016年第89期|共10页
  • 作者

    Christoforidis K. C.; Melchionna M.; Montini T.; Papoulis D.; Stathatos E.; Zafeiratos S.; Kordouli E.; Fornasiero P.;

  • 作者单位

    Univ Trieste ICCOM CNR Trieste Res Unit Dept Chem &

    Pharmaceut Sci Via L Giorgieri 1 I-34127 Trieste Italy;

    Univ Trieste ICCOM CNR Trieste Res Unit Dept Chem &

    Pharmaceut Sci Via L Giorgieri 1 I-34127 Trieste Italy;

    Univ Trieste ICCOM CNR Trieste Res Unit Dept Chem &

    Pharmaceut Sci Via L Giorgieri 1 I-34127 Trieste Italy;

    Univ Patras Dept Geol Patras 26504 Greece;

    Technol Educ Inst TEI Western Greece Dept Elect Engn Patras 26334 Greece;

    Univ Strasbourg Inst Chim &

    Proc Energie Environm &

    Sante ICPEES 25 Rue Becquerel F-67087 Strasbourg 2 France;

    Univ Patras Dept Chem Patras 26504 Greece;

    Univ Trieste ICCOM CNR Trieste Res Unit Dept Chem &

    Pharmaceut Sci Via L Giorgieri 1 I-34127 Trieste Italy;

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