A flow reactor has been found to be advantageous for a photocatalytic reaction due to enhanced transport phenomena and photon transfer. A fluoropolymer is a promising material for fabricating a photocatalytic flow reactor because it is transparent, commercially available, and inexpensive. However, its high hydrophobicity and chemically inert nature makes it difficult to coat photocatalysts. In this work, we successfully developed a protocol to immobilize photocatalysts (TiO₂–P25) onto the wall of a perfluoroalkoxy alkane tubing. The immobilization was enabled by the initial depositions of polydopamine and polyethyleneimine (PEI) layers. Then, through an ionic interaction, P25 was immobilized onto the PEI layer. A layer-by-layer PEI–P25 assembly yielded a high photocatalyst loading, which in turn enhanced the photocatalytic activity significantly. A continuous-flow operation of the photocatalytic methylene blue decolorization was demonstrated with negligible leaching of the photocatalysts and minimal loss in activity over time. A transport phenomenon inside the tubular reactor was modeled to elucidate the effect of the process parameters on kinetic and adsorption parameters. This simply fabricated flow reactor shows a great potential for photocatalytic applications.

中文翻译：

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使用多巴胺辅助固定在氟聚合物管上的连续流动光催化反应器的简单制造

由于增强的传输现象和光子转移，已发现流动反应器有利于光催化反应。含氟聚合物是用于制造光催化流动反应器的有前途的材料，因为它透明、可商购且价格低廉。然而，其高疏水性和化学惰性使其难以涂覆光催化剂。在这项工作中，我们成功开发了一种固定光催化剂（TiO ₂–P25) 到全氟烷氧基烷烃管壁上。通过聚多巴胺和聚乙烯亚胺 (PEI) 层的初始沉积来实现固定化。然后，通过离子相互作用，P25 被固定在 PEI 层上。逐层的PEI-P25组装产生了高光催化剂负载，从而显着提高了光催化活性。证明了光催化亚甲基蓝脱色的连续流动操作，光催化剂的浸出可忽略不计，并且随着时间的推移活性损失最小。对管式反应器内的传输现象进行建模，以阐明工艺参数对动力学和吸附参数的影响。这种简单制造的流动反应器显示出光催化应用的巨大潜力。