Periodic porous 3D boron-doped diamond electrode for enhanced perfluorooctanoic acid degradation

•Periodic porous boron-doped diamond (PP-BDD) anodes were successfully prepared by 3D printing combined with hot-filament chemical vapor deposition (HF-CVD) technologies.•The prepared PP-BDD anode achieves a higher (kapp = 0.022 min−1) PFOA kinetics compared with the conventional 2D-BDD anode (kapp = 0.006 min−1).•The unique periodic pore structure enables PP-BDD higher EASA than 2D-BDD and increase the mass transfer efficiency.