Study of structural and optical properties of anthocyanin- modified TiO2 for the purpose of photodegradation

Journal of Chemical Reactivity and Synthesis

دوره 9، شماره 2، شهریور 2019، صفحه 80-100   

نویسندگان

Marzieh Ataie Dila؛ Azadeh Haghighat zadeh^*

Department of Physics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

چکیده

In this research, dye – sensitization method was used to improve the photocatalytic activity of titanium dioxide dye using natural pigment of anthocyanin. Product morphology were studied by scanning electron microscopy (SEM) and phase identification using X-ray diffraction (XRD) analysis. Spectroscopic analysis of the matter was performed using FT-IR spectrometer and UV-Vis spectrophotometer. Analysis of DRS was used to study the optical properties of the samples. The results of XRD and SEM showed that the surface modification of titanium dioxide with pigments has no effect on the crystalline phase and morphology of particle. Analysis of DRS showed that dye – sensitization caused reduction in energy gap and can shift the absorption edge of TiO₂ to the visible region. The photocatalytic activity of the modified TiO₂ was studied by measuring the degradation percent of methylene blue under visible light irradiation and the effect of various parameters on the amount of degradation of methylene blue too.

کلیدواژه‌ها

Photoreaction؛ Catalysts/Catalysis؛ Titanium dioxide؛ Dye- modified