A novel capillary microphotoreactor (MPR) packed with TiO₂-coated glass beads was developed in this work and its photocatalytic performance was evaluated using degradation of methylene blue (MB) as a model reaction. As compared to conventional wall-coated MPR, the use of glass beads as packing material not only provides a larger surface area for catalyst immobilization and shortens the mass transfer route, but also introduces flow perturbation. An appropriate size of glass beads should be chosen for packing because there is a tradeoff between increased catalysts coating area and decreased light penetration. It was found out that nearly 100 % degradation efficiency could be achieved in 80# glass beads packed MPR within short residence time (20 s), which was more than 2 orders of magnitude larger than value obtained in wall-coated MPR under the same operational conditions. Moreover, the packed MPR showed good durability, which declined by about 17 % after 6 h of operation and then remained stable for next 19.5 h.

新型TiO ₂填充的毛细管微光反应器（MPR）。在这项工作中开发了涂有涂层的玻璃珠，并使用亚甲基蓝（MB）的降解作为模型反应来评估其光催化性能。与常规的壁涂MPR相比，玻璃珠作为填充材料的使用不仅为催化剂固定提供了更大的表面积，缩短了传质路线，而且还引入了流动扰动。应该选择适当尺寸的玻璃珠进行包装，因为要在增加催化剂涂层面积和降低光穿透率之间进行权衡。结果发现，在短停留时间（20 s）内，填充80＃玻璃珠的MPR可以达到近100％的降解效率，这比相同操作条件下壁涂MPR所获得的值大2个数量级。情况。而且，