Highly active Fe-doped ZIF-۸ nanocatalyst in electrochemical degradation of pharmaceutical pollutant in neutral environment

In this study, zeolitic imidazolate framework (ZIF-۸) nanocatalyst was synthesized by the thermal solvent method and doped by Fe species through wet impregnation technique. The nanocatalysts were applied for the degradation of Phenazopyridine Hydrochloride (PHP) through the heterogeneous Electro-Fenton (HEF) process. The nanocatalysts were characterized by XRD, BET-BJH, FT-IR, FE-SEM, TEM, and acidimetric-alkalimetric titration techniques. The results showed the high surface area (۱۳۳۵ m۲g-۱) and homogenous dispersion of Fe species. The influence of different operating conditions was investigated, including pH level, nanocatalyst concentration, applied current, and PHP concentration. The optimum conditions for the HEF system over the Fe-ZIF-۸ nanocatalyst were pH=۷, ۰.۲ g L-۱ of the Fe-ZIF-۸ nanocatalyst, ۱۰۰ mA, and ۱۰ ppm of PHP concentration, which resulted in ۹۹% PHP removal. The developed nanocatalyst had high reusability for the PHP removal in the HEF process. The results confirm the high potential of ZIF-۸ nanocatalyst for pharmaceutical wastewater treatment through the HEF process.

کلیدواژه ها:

Water treatment ، Electro-Fenton ، nanocatalyst ، Metal-organic framework ، ZIF-۸