Synthesis of iron-doped TiO2 for degradation of reactive Orange16

In this study the optimum conditions for preparing the iron-doped tio2 nanoparticles were investigated. sampleswere synthesized by sol–gel impregnation method. three effective parameters were optimized using taguchimethod, consisted of: (i) atomic ratios of fe to ti; (ii) sintering temperature; (iii) sintering time. the characterizationof samples was determined using x-ray diffraction, bet- specific surface area, uv- vis reflectance spectra (drs) andscanning electron microscope (sem). the xrd patterns of the samples indicated the existence of anatase crystalphase 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 thedegradation of ro 16 (ro 16) dye under uv irradiation. the results illustrated that the photocatalytic activity ofiron-doped tio2 wasmore than pure tio2, because of the smaller crystal size, grater bet surface area and higher lightabsorption ability.