首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Capillary microchannel-based microreactors with highly durable ZnO/TiO2 nanorod arrays for rapid, high efficiency and continuous-flow photocatalysis
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Capillary microchannel-based microreactors with highly durable ZnO/TiO2 nanorod arrays for rapid, high efficiency and continuous-flow photocatalysis

机译:基于毛细管微通道的微反应器,具有高度耐用的ZnO / TiO2纳米棒阵列,可进行快速,高效和连续流式光催化

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摘要

A novel, highly durable capillary-based photocatalytic microreactor containing TiO2 nanoparticle-coated ZnO nanorod arrays grown on the inner wall of the capillaries (1WC) was successfully constructed simply by pumping a TiO2 sol into capillaries containing preformed ZnO nanorod arrays. Methylene blue was used as a model organic compound to evaluate the photocatalytic performance of the capillary microreactors (CMs). The CMs containing ZnO/TiO2 nanorod arrays showed higher photocatalytic performance than a CM containing only ZnO nanorods at the same residence time. The effect of the number of TiO2 sol coatings and the recyclable properties of the CM were investigated. These CMs showed rapid and highly efficient photocatalytic activities and the ZnO/TiO2 nanorod arrays displayed high durability during continuous recycling. The superior photocatalytic activity of the ZnO/TiO2 nanorod-modified CMs was attributed to the topographical morphology induced by the nanorod arrays, and the combination of two semiconductors decreasing the recombination rate of photoinduced electrons and holes. These CMs show the promising application of the photodegradation of organic pollutants.
机译:通过将TiO2溶胶泵入包含预制ZnO纳米棒阵列的毛细管中,成功地成功构建了一种新型,高度耐用的基于毛细管的光催化微反应器,该反应器包含在毛细管(1WC)的内壁上生长的TiO2纳米颗粒涂层的ZnO纳米棒阵列。亚甲基蓝用作模型有机化合物,以评估毛细管微反应器(CMs)的光催化性能。在相同的停留时间下,含有ZnO / TiO2纳米棒阵列的CM比仅含有ZnO纳米棒的CM表现出更高的光催化性能。研究了TiO2溶胶涂层的数量和CM的可回收性能的影响。这些CM表现出快速和高效的光催化活性,而ZnO / TiO2纳米棒阵列在连续回收期间显示出高耐久性。 ZnO / TiO2纳米棒修饰的CMs优异的光催化活性归因于纳米棒阵列诱导的形貌形态,并且两种半导体的组合降低了光致电子和空穴的复合率。这些CM显示出有机污染物的光降解的有前途的应用。

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