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Iron-modified titanium dioxide nanostructured catalyst was synthesized by sol-gel method. Due to the important impacts of surface properties on the catalytic activity, the catalyst surface is investigated. To have a complete characterization of the catalyst, TEM, SEM, XPS, XRF, XRD, BET, and TGA-DTA techniques were

Antibiotic pollution via wastewaters has led to many environmental problems. In this work, to remove ciprofloxacin which is an antibiotic from water, foil photocatalyst of zinc oxide nanowires doped with copper and cerium oxides was applied under UV light irradiation. An empirical model was developed to determine the photocatalyst activity using response surface methodology. The independent variables were the concentrations of precursors, copper and cerium nitrates in the coating solution. The F‐value and p‐value of the model showed the accuracy of the model. The statistical analysis indicated that copper oxide had larger effect on the response than cerium oxide. The optimized catalyst was determined and characterized using ICP, XRD, SEM and MIP techniques. The results of this work which are comparable to those of the previous studies have the advantage of easy separation of the photocatalyst from water without using a centrifuge.

CuO/WO3/TiO2 photocatalyst was prepared by applying the sol-gel combustion method. It was characterized by X-Ray uorescence spectroscopy, X-Ray di raction, X-Ray photoelectron spectroscopy, porosimetry, and scanning electron microscopy techniques. The activity of CuO/WO 3 /TiO 2 was investigated for the photocatalytic degradation of phenol wastewater. Operating conditions of batch experiments, such as initial concentration of phenol, photocatalyst dose, amount of H2O2, and pH, were optimized. Rate constants of the pseudo rst-order reaction for several photocatalysts were determined (TiO2: 0.0054 min 1 , WO3/TiO2: 0.0071 min 1 , CuO/TiO2: 0.0118 min 1 , CuO/WO 3 /TiO 2 : 0.0621 min 1). The CuO/WO 3 /TiO 2 had the best performance, and its rate constant was 11.5 times greater than TiO 2. The CuO/WO 3 /TiO 2 activity was considerable under sun light. The activity of CuO/WO3/TiO2 for 4-chlorophenol and 3-phenyl-1-propanol degradation was also successful.