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首页> 外文期刊>Environmental Science & Technology >Comment on 'Intimate Coupling of Photocatalysis and Biodegradation for Degrading Phenol Using Different Light Types: Visible Light vs UV Light'
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Comment on 'Intimate Coupling of Photocatalysis and Biodegradation for Degrading Phenol Using Different Light Types: Visible Light vs UV Light'

机译：评论“光催化与生物降解的紧密耦合，以使用不同的光类型：可见光与紫外光降解苯酚”

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摘要

Recently published experiments by Zhou et al. describe a hybrid photocatalysis-biodegradation reactor ("ICPB") for treating water contaminated with recalcitrant organic compounds. One particular aspect of their work is scrutinized herein, within the context of what I believe to be a flawed body of work, with contributions from several groups. The paper perpetuates poorly supported claims of upconversion-sensitized photocatalysis involving erbium-doped phosphors, the implications of which likely misguided the interpretation of their results. The novel aspect of the Zhou et al. paper was the use of visible light irradiation and a visible light-active photocatalytic system in the ICPB. A TiO_2/YAlO_3:Er~(3+) composite material was used, which allegedly converted visible wavelengths to UV radiation via upconversion; these UV photons were then implicated in photocatalytic degradation of phenol by the TiO_2 component. Based on existing literature, however, I believe that YAlO_3:Er~(3+) is not capable of emitting significant amounts of UV via upconversion under their experimental conditions. The appearance of this claim in ES&T gives undue validation to similar misguided claims regarding the efficiency of visible-to-UV upconversion materials, which have appeared in lower impact journals over the past 9 years. Herein, the past literature on YAlO_3:Er~(3+) upconversion is summarized and an alternative explanation for the behavior of the ICPB is offered.
机译：Zhou等人最近发表的实验。美国专利No.5,775,877描述了一种混合光催化生物降解反应器（“ ICPB”），用于处理被难降解的有机化合物污染的水。在我认为这是一个有缺陷的工作体系的背景下，由几个小组做出了贡献，在此审查了他们工作的一个特定方面。该论文长期以来都缺乏支持，涉及掺-磷光体的上转换敏化光催化作用，其含义可能会误导其结果的解释。周等人的小说方面。纸是在ICPB中使用可见光照射和可见光活性光催化系统。使用了TiO_2 / YAlO_3：Er〜（3+）复合材料，据称该材料通过上转换将可见光波长转换为UV辐射。然后将这些紫外线光子与TiO_2组分光催化降解苯酚有关。但是，根据现有文献，我相信YAlO_3：Er〜（3+）在其实验条件下不能通过上转换发射大量的UV。该声明在ES＆T中的出现，对类似的关于可见光到UV上转换材料的效率的误导性声明提供了不当的验证，这些声明在过去9年中已出现在影响较小的期刊上。在此，总结了过去有关YAlO_3：Er〜（3+）上转换的文献，并提供了ICPB行为的另一种解释。

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  • 来源
    《Environmental Science & Technology》 |2015年第21期|13075-13076|共2页
  • 作者

    Ezra L. Cates;

  • 作者单位

    Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29631, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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