Advanced oxidation procedures using heterogeneous semiconductor photocatalysts have been regarded as one of the most promising approaches for the remediation of environmental pollution. In this study, hexagonal boron nitride (BN) was synthesized using the chemical vapor deposition method, and to further improve its photocatalytic properties, nitrogen-doped reduced graphene oxide (NRGO) was composited. This was achieved by varying the ratios via hydrothermal synthesis at 180 °C for 12 h to form BN
NRGO nanocomposites, which were used for the photocatalytic degradation of perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA). These composites were characterized using FTIR, SEM-EDX, UV–VIS, and Raman spectroscopy to investigate their physicochemical and optical properties. The as-synthesized BN
NRGO (1–3) photocatalyst ratio achieved 56% removal efficiency of PFOA and 82% of PFOS after 150 min of irradiation. The efficiency of the photocatalyst was determined by optimizing catalyst dosage and pH. Optimal degradation of 72% PFOA and 99% PFOS was achieved at a pH of 2 and a catalyst dosage of 100 mg. A decrease was observed with an increase in pH from 8 to 10, where PFOA decreased from 72% to 18% and PFOS decreased from 99% to 51%. The phytotoxicity of the degradation products shows no phytotoxic effects on Lactuca sativa. Thus, the degradation pathway for PFOA and PFOS by BN
NRGO nanocomposites was attributed to the hole-initiated reaction.
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