ß‐Ga 2 O 3 Nanorod Synthesis with a One‐step Microwave Irradiation Hydrothermal Method and its Efficient Photocatalytic Degradation for Perfluorooctanoic Acid

ß‐Ga 2 O 3 nanorod was first directly prepared by the microwave irradiation hydrothermal way without any subsequent heat treatments, and its characterizations were analyzed by X‐ray diffraction (XRD), scanning electron microscope (SEM), high‐resolution transmission electron microscope (HRTEM), UV–Vis diffuse reflection spectroscopy techniques, and also its photocatalytic degradation for perfluorooctanoic acid (PFOA) was investigated. XRD patterns revealed that ß‐Ga 2 O 3 crystallization increased with the enhancement of microwave power and the adding of active carbon (AC). PFOA, as an environmental and persistent pollutant, is hard decomposed by hydroxyl radicals (HO·); however, it is facilely destroyed by ß‐Ga 2 O 3 photocatalytic reaction in an anaerobic atmosphere. The important factors such as pH , ß‐Ga 2 O 3 dosage and bubbling atmosphere were researched, and the degradation and defluorination was 98.8% and 56.2%, respectively. Reductive atmosphere reveals that photoinduced electron may be the major reactant for PFOA. Furthermore, the degradation kinetics for PFOA was simulated and constant and half‐life was calculated, respectively.