Abstract
In this study the optimum conditions for preparing the iron-doped TiO2 nanoparticles were investigated. Samples were synthesized by sol–gel impregnation method. Three effective parameters were optimized using Taguchi method, consisted of: (i) atomic ratios of Fe to Ti; (ii) sintering temperature; (iii) sintering time. The characterization of samples was determined using X-ray diffraction, BET- specific surface area, UV- Vis reflectance spectra (DRS) and scanning electron microscope (SEM). The XRD patterns of the samples indicated the existence of anatase crystal phase in structure. UV- Vis reflectance spectra showed an enhancement in light absorbance in the visible region (wavelength > 400 nm) for iron-doped samples. The photocatalytic activity of samples was investigated by the degradation of RO 16 (RO 16) dye under UV irradiation. The results illustrated that the photocatalytic activity of iron-doped TiO2 was more than pure TiO2, because of the smaller crystal size, grater BET surface area and higher light absorption ability.
Highlights
Nowadays, increasing consumption of the wide variety of synthetic dyes in fabric dyeing, paper printing, color photography and product industrial contamination from the effluents has become significantly warning day by day
Photodegradation of various azo-dyes have been reported like RO 16 (RO 16) (Figure 1)
The aim of the present study is to synthesize conditions of Fe/Ti mixed oxides such as sintering temperature, sintering time and atomic ratios of Fe to Ti have seldom been optimized by Taguchi method, which is our motivation behind this study
Summary
Nowadays, increasing consumption of the wide variety of synthetic dyes in fabric dyeing, paper printing, color photography and product industrial contamination from the effluents has become significantly warning day by day. Azo-dyes build a high portion of synthetic dyes. Photodegradation of various azo-dyes have been reported like RO 16 (RO 16) (Figure 1). They are more poisonous and resistant to destroy by biological treatment methods [1,2,3,4]. The heterogeneous photocatalytic process has been a rapidly growing research area for the purification and complete mineralization of organic pollutants in industrial waste water and air [5]. The unique properties of titanium dioxide (TiO2) such as high photocatalytic activity, high chemical stability and low toxicity have made it a suitable photocatalyst in recent decades [6]. The other, is to extend its photocatalytic activity into the visible light
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