The results of a laboratory-scale study of an environmentally friendly water treatment method are presented, where the dyes in the industrial textile wastewater were removed by photocatalytic process. ZnO-TiO2 nanopar...The results of a laboratory-scale study of an environmentally friendly water treatment method are presented, where the dyes in the industrial textile wastewater were removed by photocatalytic process. ZnO-TiO2 nanoparticles as photocatalyst has been prepared via sol-gel technique. Several factors were studied in order to find the conditions that could be used to synthesize this photocatalyst for optimum degradation of Indigo Carmine dye in aqueous solutions. The optimum condition for preparation of ZnO-TiO2 mixed oxide are 1.5 TiO2/ZnO, 4 C2HsOH/TIP, 4 H20/TIP, 0.3 HNO3/TIP molar ratios, without aging, 550 ℃ calcination temperature for 5 hrs at which the surface area and the photocatalytic activity are 186.1 m^2/g and 96.1, respectively. Generally, the photocatalytic activity of the samples prepared by sol-gel technique is the highest activity. Details of the synthesis procedure and results of the characterization studies of the produced xerogel are presented in this paper.展开更多
文摘The results of a laboratory-scale study of an environmentally friendly water treatment method are presented, where the dyes in the industrial textile wastewater were removed by photocatalytic process. ZnO-TiO2 nanoparticles as photocatalyst has been prepared via sol-gel technique. Several factors were studied in order to find the conditions that could be used to synthesize this photocatalyst for optimum degradation of Indigo Carmine dye in aqueous solutions. The optimum condition for preparation of ZnO-TiO2 mixed oxide are 1.5 TiO2/ZnO, 4 C2HsOH/TIP, 4 H20/TIP, 0.3 HNO3/TIP molar ratios, without aging, 550 ℃ calcination temperature for 5 hrs at which the surface area and the photocatalytic activity are 186.1 m^2/g and 96.1, respectively. Generally, the photocatalytic activity of the samples prepared by sol-gel technique is the highest activity. Details of the synthesis procedure and results of the characterization studies of the produced xerogel are presented in this paper.
