DOI: https://doi.org/10.55373/mjchem.v25i3.368

Keywords: Molybdenum disulphide; response surface methodology; photodegradation; perfluorooctanoic acid

Abstract

In this research work, molybdenum disulphide-graphene oxide (MoS2-GO) was synthesized to be a promising photocatalyst for the degradation of perfluorooctanoic acid (PFOA) by using a photoreactor equipped with an 18-watt fluorescent lamp. Box–Behnken design (BBD) was applied to optimize parameters such as mixing ratio MoS2 in GO (A: 0% ,7.5% ,15%), pH (B: 2, 6, 10), catalyst dose (C: 5 mg, 12.5 mg, 20 mg), and contact time (D: 10 min, 65 min, 120 min). The highest PFOA degradation efficiency of 87.5% was observed for mixing ratio MoS2 with GO (%), pH, catalyst dose, and contact time were 15%, pH 6, 12.5 mg, 120 min, respectively. Besides, dual interactions such as AC, BD and CD were identified to be significant in this BBD model. The optimization from this study demonstrated a superior photodegradation of PFOA in fewer trials, which was time saving and cost effective. Therefore, the results of this research may pave the way for more important applications down the road, including the treatment of actual wastewater, elimination of organic pollutants, and minimization of chemical discharge.