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Selective degradation of organic dyes by a resin modified Fe-based metal-organic framework under visible light irradiation

机译：可见光照射下树脂改性的铁基金属有机骨架对有机染料的选择性降解

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摘要

Metal organic frameworks (MOFs), a new class of porous crystalline materials have attracted attention because of potential applications in environmental remediation. In this work, an Fe-based MOF, FeBTC (BTC = 1,3,5-tricarboxylic acid), was successfully modified with Amberlite IRA-200 resin to yield a novel heterogeneous photocatalyst, A@FeBTC. The modification resulted in higher photocatalytic activity than FeBTC under the sane conditions. After 60 min of visible light illumination (lambda >= 420 nm) 99% of rhodamine B was degraded. The modification lowers the zeta potential, enhancing charge-based selective adsorption and subsequent photocatalytic degradation of cationic dye pollutants. The composite also improved catalyst stability and recyclability by significantly reducing loss of iron leaching. Photoluminescence studies show that introduction of the resin reduces the recombination rate of photo generated charge carriers thereby improving the photocatalytic activity of the composite. Finally, a plausible photocatalytic reaction mechanism is proposed. (C) 2016 Elsevier B.V. All rights reserved.
机译：金属有机骨架（MOF）是一类新型的多孔晶体材料，由于其在环境修复中的潜在应用而备受关注。在这项工作中，使用Amberlite IRA-200树脂成功修饰了基于Fe的MOF FeBTC（BTC = 1,3,5-三羧酸），得到了新型多相光催化剂A @ FeBTC。在健全的条件下，这种改性导致比FeBTC更高的光催化活性。可见光照射60分钟（λ> = 420 nm）后，降解了99％的若丹明B。改性降低了ζ电位，增强了基于电荷的选择性吸附以及随后对阳离子染料污染物的光催化降解。该复合物还通过显着减少铁浸出的损失而改善了催化剂的稳定性和可回收性。光致发光研究表明，树脂的引入降低了光生电荷载体的复合率，从而提高了复合材料的光催化活性。最后，提出了合理的光催化反应机理。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Optical Materials》 |2017年第2期|512-523|共12页
  • 作者

    Araya Tirusew; Chen Chun-cheng; Jia Man-ke; Johnson David; Li Ruiping; Huang Ying-ping;

  • 作者单位

    China Three Gorges Univ Coll Hydraul & Environm Engn Yichang 443002 Peoples R China|Innovat Ctr Geohazards & Ecoenvironm Three Gorges Yichang 443002 Hubei Province Peoples R China|China Three Gorges Univ Minist Educ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Yichang 443002 Peoples R China;

    Innovat Ctr Geohazards & Ecoenvironm Three Gorges Yichang 443002 Hubei Province Peoples R China|China Three Gorges Univ Minist Educ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Yichang 443002 Peoples R China;

    China Three Gorges Univ Minist Educ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Yichang 443002 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    FeBTC; Immobilization; Amberlite; Selectivity; Photocatalysis; Metal organic framework;

    机译：FeBTC;固定;琥珀色;选择性;光催化;金属有机骨架;

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