Fe2O3-loaded activated carbon fiber/polymer materials and their photocatalytic activity for methylene blue mineralization by combined heterogeneous-homogeneous photocatalytic processes

•Fe2O3-activated carbon felts was prepared for adsorption-photodegradation of dyes.•Simultaneous mineralization of MB and oxalic acid occurred under UV-irradiation.•Methylene blue adsorption was better fitted to the Langmuir model.•Increasing amount of Fe2O3 decreased the SBET and methylene blue adsorption capacity.•Photodegraded amount of MB was increased with increasing the Fe2O3 content.