Kinetic studies of dexamethasone degradation in aqueous solution via a photocatalytic UV/HO/MgO process.

Wastewaters discharged from different industries and hospitals may contain pharmaceuticals, especially dexamethasone (DEX). Thus, we applied the UV/HO photocatalytic method in the presence of the MgO nanoparticles to remove dexamethasone from synthetic wastewater. Moreover, the effects of parameters such as pH (3-11), hydrogen peroxide concentration (1-8 mM), initial DEX concentration (5-30 mg/L), and catalyst dosage (0.

Step-scheme BiVO/WO heterojunction photocatalyst under visible LED light irradiation removing 4-chlorophenol in aqueous solutions.

In the present study, photodegradation of 4-chlorophenol (4-CP) using a step-scheme BiVO/WO heterostructure under visible LED light irradiation (Vis LED) from aqueous solutions was investigated. The photocatalyst was synthesized through the hydrothermal process and characterized physically and chemically via X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), energy-dispersive X-ray (EDX), and Brunnauer-Emmett-Teller (BET) techniques. The effects of the operational parameters i.