Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid in Aqueous Solution Using Mn-doped ZnO/Graphene Nanocomposite Under LED Radiation

摘要: Chemical pesticides and herbicides are one of the most important pollutants in urban, agricultural industrial wastewaters. Improper discharge these compounds into water bodies’ cause harmful effects on both environment human health. In this study, photocatalytic degradation 2,4-Dichlorophenoxyacetic acid (usually called 2,4-D) was investigated using Mn-doped zinc oxide/graphene nanocomposite under light emitting diodes (LED) radiation. FTIR, AFM, DLS, Zeta potential, XRD, SEM techniques were used to determine characteristics nanocomposite. The process-related parameters, such as amount nanocomposite, initial pH, 2,4-D concentrations, contact time, studied. results showed that efficiency decreased with an increase concentration 2,4-D, while increased by increasing pH nano-catalyst content. 66.2% could be photocatalytically degraded LED radiation at optimal conditions (pH 5, Zn 10 mg L−1, nano-composite 2 g L−1, time 120 min). Findings experimental study concluded photocatalysis efficiently remove herbicide from aqueous media.