Materials and Fabrication of Photocatalytic Hollow Fibers and Hollow Fiber Membranes

Photocatalysis is widely used for toxic air and water pollutant degradation, water slitting and H2 production, and the reduction of CO2 to useful hydrocarbons. Hollow fibers (HFs) have been widely used as photocatalyst immobilizers for advanced oxidation and reduction applications under batch conditions, with active semiconductors either applied on their surface or incorporated into their matrix. Photocatalytic hollow fiber membranes (HFMs), the porous version of the above-mentioned fibers, which exhibit dual functionality in the degradation and physical separation of contaminants, are currently applied under flow conditions for wastewater recycling and reuse. This work provides a concise overview of all the studies encountered in the literature on photocatalytic HFs and HFMs, categorizes them with respect to their materials and fabrication methods and aspires to serve as a guide for anyone wanting to prepare and use them in photocatalytic batch or flow reactors.